Import Upstream version 1.8.5

[hcoop/debian/openafs.git] / src / scout / scout.c

/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 *
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * Scout: A quick and (semi-)dirty attempt at the old CMU vopcon.
 *------------------------------------------------------------------------*/

#include <afsconfig.h>
#include <afs/param.h>

#include <roken.h>

#undef  IN
#include <afs/gtxwindows.h>             /*Generic window package */
#include <afs/gtxobjects.h>             /*Object definitions */
#include <afs/gtxtextobj.h>             /*Text object interface */
#include <afs/gtxlightobj.h>    /*Light object interface */
#include <afs/gtxcurseswin.h>   /*Curses window package */
#include <afs/gtxdumbwin.h>             /*Dumb terminal window package */
#include <afs/gtxX11win.h>              /*X11 window package */
#include <afs/gtxframe.h>               /*Frame package */
#include <afs/gtxinput.h>
#include <afs/cmd.h>            /*Command interpretation library */
#include <afs/fsprobe.h>                /*Interface for fsprobe module */
#include <afs/afsutil.h>

/*
 * Command line parameter indicies.
 */
#define P_SERVER    0
#define P_BASE      1
#if 0
#define P_PACKAGE   2
#endif /* 0 */
#define P_FREQ      2
#define P_HOST      3
#define P_ATTENTION 4
#define P_DEBUG     5
#define P_WIDTHS    6

/*
  * Define the default width in chars for each light object on the mini-line.
  */
#define LIGHTOBJ_CONN_WIDTH      5
#define LIGHTOBJ_FETCH_WIDTH    10
#define LIGHTOBJ_STORE_WIDTH    10
#define LIGHTOBJ_WK_WIDTH        5
#define LIGHTOBJ_SRVNAME_WIDTH  13
#define LIGHTOBJ_DISK_WIDTH     12

/*
 * Define column width indices.
 */
#define COL_CONN        0
#define COL_FETCH       1
#define COL_STORE       2
#define COL_WK          3
#define COL_SRVNAME     4
#define COL_DISK        5

/*
 * Define the types of justification we can perform.
 */
#define SCOUT_RIGHT_JUSTIFY     0
#define SCOUT_LEFT_JUSTIFY      1
#define SCOUT_CENTER            2

/*
 * Define the types of truncation we can perform.
 */
#define SCOUT_LEFT_TRUNC        0
#define SCOUT_RIGHT_TRUNC       1

/*
 * Define whether the value passed is a labeled disk quantity.
 */
#define SCOUT_ISNT_LDISK        0
#define SCOUT_IS_LDISK          1

/*
  * We sometimes use index-base pointers, so we need a distinguished
  * NIL value.
  */
#define SCOUT_NIL  (-1)

/*
  * Structure describing everything you want to know about a FileServer
  * disk.
  */
struct scout_disk {
    int prev;                   /*Index of previous list entry */
    int next;                   /*Index of next list entry */
    int active;                 /*Is this disk known to exist? */
    char *name;                 /*Single-letter disk name */
    struct onode *disk_lp;      /*Ptr to disk light object */
};

/*
  * Structure defining all the objects in the Scout line (or lines)
  * for each server being watched.  Note that scout_disk linked list
  * for used disks is ordered alphabetically.
  */
struct mini_line {
    /*
     * Information on server location & configuration.
     */
    struct sockaddr_in skt;     /*Server's socket info */
    int numDisks;               /*Number of disks used */
    /*
     * Screen location info.
     */
    int base_line;              /*Line number on the screen */
    int num_lines;              /*Number of lines of info */
    /*
     * Associated light objects.
     */
    struct onode *currConns_lp; /*Number of current connections */
    struct onode *fetches_lp;   /*Number of data fetches */
    struct onode *stores_lp;    /*Number of data stores */
    struct onode *workstations_lp;      /*Workstation info */
    struct onode *srvName_lp;   /*Server name */
    struct scout_disk disks[VOLMAXPARTS];       /*Info on all the disks */
    int used_head;              /*Index of first used disk struct */
    int used_tail;              /*Index of last used disk struct */
    int free_head;              /*Index of first free disk struct */
    int free_tail;              /*Index of last free disk struct */
};

/*
  * Structure defining the contents of the Scout screen.
  */
struct mini_screen {
    int numServers;             /*Number of servers being watched */
    int base_line_num;          /*Base mini-line number */
    struct mini_line *line;     /*Array of screen lines */
};

static char pn[] = "scout";     /*Program name */
static int scout_debug = 0;     /*Is debugging turned on? */
static FILE *scout_debugfd;     /*Debugging file descriptor */
static int scout_gtx_initialized = 0;   /*Has gtx been initialized? */
static struct mini_screen scout_screen; /*Mini-screen itself */
static int scout_probefreq;     /*Probe frequency in seconds */
static char scout_basename[64]; /*Base server name */
static char scout_hostname[128];        /*Name of machine we're running on */
static int scout_showhostname = 0;      /*Show name of machine we're on? */
static char scout_blankline[256];       /*Blank line */
static struct gwin *scout_gwin; /*Window to use */
static struct gtx_frame *scout_frame;   /*Frame to use */
static struct onode *scout_banner0_lp;  /*Banner light, line 0 */
static struct onode *scout_banner1_lp;  /*Banner light, line 1 */
static struct onode *scout_banner2_lp;  /*Banner light, line 2 */
static int scout_DiskLightLeftCol = 0;  /*Column for leftmost disk light */
static struct gwin_sizeparams scout_frameDims;  /*Frame dimensions */

static int scout_col_width[] = { LIGHTOBJ_CONN_WIDTH,
    LIGHTOBJ_FETCH_WIDTH,
    LIGHTOBJ_STORE_WIDTH,
    LIGHTOBJ_WK_WIDTH,
    LIGHTOBJ_SRVNAME_WIDTH,
    LIGHTOBJ_DISK_WIDTH
};

/*
  * Attention thresholds & modes.
  */
#define SCOUT_ATTN_NOTUSED  (-1)
#define SCOUT_DISKM_PCUSED    0
#define SCOUT_DISKM_MINFREE   1

static int scout_attn_conn = SCOUT_ATTN_NOTUSED;
static int scout_attn_fetch = SCOUT_ATTN_NOTUSED;
static int scout_attn_store = SCOUT_ATTN_NOTUSED;
static int scout_attn_workstations = SCOUT_ATTN_NOTUSED;
static int scout_attn_disk_mode = SCOUT_DISKM_PCUSED;
static int scout_attn_disk_minfree = 1000;
static float scout_attn_disk_pcused = 0.95;
static char scout_attn_disk_pcusedstr[8] = "95";

/*
  * Some strings we'll be using over and over again.
  */
static char scout_Banner[256];
static const char *scout_label[] =
    { "Conn", "Fetch", "Store", "Ws", "", "Disk attn" };
static const char *scout_underline[] =
    { "----", "--------", "--------", "-----", "", "----------" };


/*------------------------------------------------------------------------
 * scout_CleanExit
 *
 * Description:
 *      Exits cleanly from the Scout.  If gtx has not yet been initialized,
 *      then we simply call exit() with the value provided.  Otherwise,
 *      we call the appropriate gtx routine to exit cleanly from gtx, which
 *      must reset the terminal or window.  We also close the debugging
 *      file descriptor, if one has been opened.
 *
 * Arguments:
 *      int a_exitval : Value with which to exit the program.
 *
 * Returns:
 *      Void.
 *
 * Environment:
 *      Actions depend on scout_gtx_initialized.
 *
 * Side Effects:
 *      This routine will always exit Scout.
 *------------------------------------------------------------------------*/

static void
scout_CleanExit(int a_exitval)
{                               /*scout_CleanExit */

    static char rn[] = "scout_CleanExit";       /*Routine name */

    if (scout_debugfd != (FILE *) 0) {
        fprintf(scout_debugfd, "[%s] Closing debugging file\n", rn);
        fclose(scout_debugfd);
    }

    if (scout_gtx_initialized) {
        gtxframe_exitValue = a_exitval;
        gtxframe_ExitCmd((void *)(&gtxframe_exitValue), NULL);
    } else
        exit(a_exitval);

}                               /*scout_CleanExit */

/*------------------------------------------------------------------------
 * mini_initLightObject
 *
 * Description:
 *      Create and initialize a light onode according to the given
 *      parameters.
 *
 * Arguments:
 *      char *a_name       : Ptr to the light's string name.
 *      int a_x            : X offset.
 *      int a_y            : Y offset.
 *      int a_width        : Width in chars.
 *      struct gwin *a_win : Ptr to window structure.
 *
 * Returns:
 *      Ptr to new light onode on success,
 *      A null pointer otherwise.
 *
 * Environment:
 *      See above.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static struct onode *
mini_initLightObject(char *a_name, int a_x, int a_y, int a_width, struct gwin *a_win)
{                               /*mini_initLightObject */

    static char rn[] = "mini_initLightObject";  /*Routine name */
    struct onode *newlightp;    /*Ptr to new light onode */
    /*We only support curses right now */
    struct gator_light_crparams light_crparams; /*Light creation params */
    char *truncname;            /*Truncated name, if needed */
    int name_len;               /*True length of name */

    if (scout_debug) {
        fprintf(scout_debugfd,
                "[%s] Called for name '%s', [%d, %d], %d-char field\n", rn,
                a_name, a_x, a_y, a_width);
        fflush(scout_debugfd);
    }
    newlightp = NULL;

    /*
     * Set up the creation parameters according to the information we've
     * received.
     */
    light_crparams.onode_params.cr_type = GATOR_OBJ_LIGHT;
    name_len = strlen(a_name);
    if (scout_debug)
        fprintf(scout_debugfd, "[%s] Name '%s' has %d chars\n", rn, a_name,
                name_len);
    if (name_len <= a_width)
        sprintf(light_crparams.onode_params.cr_name, "%s", a_name);
    else {
        /*
         * We need to truncate the given name, leaving a `*' at the end to
         * show us it's been truncated.
         */
        truncname = light_crparams.onode_params.cr_name;
        strncpy(truncname, a_name, a_width - 1);
        truncname[a_width - 1] = '*';
        truncname[a_width] = 0;
    }
    light_crparams.onode_params.cr_x = a_x;
    light_crparams.onode_params.cr_y = a_y;
    light_crparams.onode_params.cr_width = a_width;
    light_crparams.onode_params.cr_height = 1;
    light_crparams.onode_params.cr_window = a_win;
    light_crparams.onode_params.cr_home_obj = NULL;
    light_crparams.onode_params.cr_prev_obj = NULL;
    light_crparams.onode_params.cr_parent_obj = NULL;
    light_crparams.onode_params.cr_helpstring = NULL;

    light_crparams.appearance = 0;
    light_crparams.flashfreq = 0;
    sprintf(light_crparams.label, "%s", a_name);
    light_crparams.label_x = 0;
    light_crparams.label_y = 0;

    newlightp =
        gator_objects_create((struct onode_createparams *)(&light_crparams));

    /*
     * Return the news, happy or not.
     */
    return (newlightp);

}                               /*mini_initLightObject */

/*------------------------------------------------------------------------
 * scout_initDiskLightObjects
 *
 * Description:
 *      Create and initialize all Scout light objects for a server's
 *      disks.
 *
 * Arguments:
 *      struct scout_disk *a_line : Ptr to the server object line.
 *      struct gwin *a_win        : Ptr to window structure.
 *
 * Returns:
 *      0 on success,
 *      -1 otherwise.
 *
 * Environment:
 *      See above.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static int
scout_initDiskLightObjects(struct mini_line *a_line, struct gwin *a_win)
{                               /*scout_initDiskLightObjects */

    static char rn[] = "scout_initDiskLightObjects";    /*Routine name */
    struct scout_disk *curr_disk;       /*Ptr to current disk being set up */
    int i;                      /*Loop variable */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*
     * Set up the base linked list fields.
     */
    a_line->used_head = SCOUT_NIL;
    a_line->used_tail = SCOUT_NIL;
    a_line->free_head = 0;
    a_line->free_tail = VOLMAXPARTS - 1;

    /*
     * Sweep through the disk structures, creating the light objects and
     * marking them all as free.
     */
    curr_disk = a_line->disks;
    for (i = 0; i < VOLMAXPARTS; i++) {
        /*
         * Create the disk light object.
         */
        if ((curr_disk->disk_lp = mini_initLightObject("Disk",  /*Object name */
                                                       0,       /*X value */
                                                       0,       /*Y value */
                                                       scout_col_width[COL_DISK],       /*Width */
                                                       a_win))  /*Window */
            == NULL) {
            fprintf(stderr, "[%s:%s] Can't create disk %d light object\n", pn,
                    rn, i);
            return (-1);
        }

        /*
         * Set the other fields in the disk records; Note that in the
         * fencepost cases, the prev and next pointers will have to be
         * fixed.
         */
        curr_disk->prev = i - 1;
        curr_disk->next = i + 1;
        curr_disk->active = 0;
        curr_disk->name = "";

        /*
         * Bump up to the next disk structure.
         */
        curr_disk++;

    }                           /*for each disk structure */

    /*
     * We made it all the way through.  Fix the fencepost pointers, set
     * the overall pointers, then return success.
     */
    a_line->disks[0].prev = SCOUT_NIL;
    a_line->disks[VOLMAXPARTS - 1].next = SCOUT_NIL;

    return (0);

}                               /*scout_initDiskLightObjects */


/*------------------------------------------------------------------------
 * mini_justify
 *
 * Description:
 *      Place the chars in the source buffer into the target buffer
 *      with the desired justification, either centered, left-justified
 *      or right-justified.  Also, support inidication of truncation
 *      with a star (*), either on the left or right of the string,
 *      and whether we're justifying a labeled disk quantity.
 *
 * Arguments:
 *      char *a_srcbuff     : Ptr to source char buffer.
 *      char *a_dstbuff     : Ptr to dest char buffer.
 *      int a_dstwidth      : Width of dest buffer in chars.
 *      int a_justification : Kind of justification.
 *      int a_rightTrunc    : If non-zero, place the truncation char
 *                            on the right of the string.  Otherwise,
 *                            place it on the left.
 *      int a_isLabeledDisk : Is this a labeled disk quantity?
 *
 * Returns:
 *      0 on success,
 *      -1 otherwise.
 *
 * Environment:
 *      All it needs to know is exported by the fsprobe module, namely
 *      the data structure where the probe results are stored.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

int
mini_justify(char *a_srcbuff, char *a_dstbuff, int a_dstwidth,
             int a_justification, int a_rightTrunc,
             int a_isLabeledDisk)
{                               /*mini_justify */

    static char rn[] = "mini_justify";  /*Routine name */
    int leftpad_chars;          /*# of chars for left-padding */
    int num_src_chars;          /*# of chars in source */
    int true_num_src_chars;     /*# src chars before truncation */
    int trunc_needed;           /*Is truncation needed? */
    char diskChar = 0;          /*Disk name prefix */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called with '%s', dest width=%d\n", rn,
                a_srcbuff, a_dstwidth);
        fflush(scout_debugfd);
    }

    /*
     * Remember the disk label, if we've been passed such a thing.
     */
    if (a_isLabeledDisk)
        diskChar = *a_srcbuff;

    /*
     * If the destination width will overrun the gtx string storage,
     * we automatically shorten up.
     */
    if (a_dstwidth > GATOR_LABEL_CHARS) {
        if (scout_debug) {
            fprintf(scout_debugfd,
                    "[%s] Dest width (%d) > gtx buflen (%d), shrinking dest width\n",
                    rn, a_dstwidth, GATOR_LABEL_CHARS);
            fflush(scout_debugfd);
        }
        a_dstwidth = GATOR_LABEL_CHARS;
    }

    /*
     * If our source string is too long, prepare for truncation.
     */
    true_num_src_chars = strlen(a_srcbuff);
    if (true_num_src_chars >= a_dstwidth) {
        trunc_needed = 1;
        num_src_chars = a_dstwidth - 1;
        leftpad_chars = 0;
        if (!a_rightTrunc)
            a_srcbuff += (true_num_src_chars - num_src_chars);
    } else {
        trunc_needed = 0;
        num_src_chars = true_num_src_chars;

        /*
         * Compute the necessary left-padding.
         */
        switch (a_justification) {

        case SCOUT_RIGHT_JUSTIFY:
            leftpad_chars = (a_dstwidth - 1) - num_src_chars;
            break;

        case SCOUT_LEFT_JUSTIFY:
            /*
             * This is the really easy one.
             */
            leftpad_chars = 0;
            break;

        case SCOUT_CENTER:
            leftpad_chars = ((a_dstwidth - 1) - num_src_chars) / 2;
            break;

        default:
            fprintf(stderr, "[%s] Illegal justification command: %d", rn,
                    a_justification);
            return (-1);
        }                       /*Switch on justification type */
    }

    /*
     * Clear out the dest buffer, then place the source string at the
     * appropriate padding location.  Remember to place a string
     * terminator at the end of the dest buffer, plus whatever truncation
     * may be needed.  If we're left-truncating, we've already shifted
     * the src buffer appropriately.
     */
    strncpy(a_dstbuff, scout_blankline, a_dstwidth);
    strncpy(a_dstbuff + leftpad_chars, a_srcbuff, num_src_chars);
    *(a_dstbuff + a_dstwidth - 1) = '\0';
    if (trunc_needed) {
        if (a_rightTrunc)
            *(a_dstbuff + a_dstwidth - 2) = '*';        /*Truncate on the right */
        else {
            if (a_isLabeledDisk) {
                *a_dstbuff = diskChar;
                *(a_dstbuff + 1) = ':';
                *(a_dstbuff + 2) = '*'; /*Truncate on the left, disk */
            } else
                *a_dstbuff = '*';       /*Truncate on the left, non-disk */
        }
    }

    /*Handle truncations */
    /*
     * Return the good news.
     */
    return (0);

}                               /*mini_justify */

/*------------------------------------------------------------------------
 * scout_SetNonDiskLightLine
 *
 * Description:
 *      Given a mini-line and a line number, place all non-disk lights
 *      on that line.
 *
 * Arguments:
 *      struct mini_line *a_srvline : Ptr to server descriptor.
 *      int a_linenum               : Line number to move to.
 *
 * Returns:
 *      Nothing.
 *
 * Environment:
 *      The light's location is stored not only in the onode, but in
 *      the light's rock, so we have to change both sets of value.
 *
 * Side Effects:
 *      As described.
 *------------------------------------------------------------------------*/

static void
scout_SetNonDiskLightLine(struct mini_line *a_srvline, int a_linenum)
{                               /*scout_SetNonDiskLightLine */

    struct gator_lightobj *nondisk_lightdata;   /*Non-disk light data field */
    struct gwin_strparams *nondisk_strparams;   /*Associated string params */

    /*
     * Do the exact same operation for each non-disk light in the record.
     */
    a_srvline->currConns_lp->o_y = a_linenum;
    nondisk_lightdata =
        (struct gator_lightobj *)(a_srvline->currConns_lp->o_data);
    nondisk_strparams = (struct gwin_strparams *)(nondisk_lightdata->llrock);
    nondisk_strparams->y = a_linenum;

    a_srvline->fetches_lp->o_y = a_linenum;
    nondisk_lightdata =
        (struct gator_lightobj *)(a_srvline->fetches_lp->o_data);
    nondisk_strparams = (struct gwin_strparams *)(nondisk_lightdata->llrock);
    nondisk_strparams->y = a_linenum;

    a_srvline->stores_lp->o_y = a_linenum;
    nondisk_lightdata =
        (struct gator_lightobj *)(a_srvline->stores_lp->o_data);
    nondisk_strparams = (struct gwin_strparams *)(nondisk_lightdata->llrock);
    nondisk_strparams->y = a_linenum;

    a_srvline->workstations_lp->o_y = a_linenum;
    nondisk_lightdata =
        (struct gator_lightobj *)(a_srvline->workstations_lp->o_data);
    nondisk_strparams = (struct gwin_strparams *)(nondisk_lightdata->llrock);
    nondisk_strparams->y = a_linenum;

    a_srvline->srvName_lp->o_y = a_linenum;
    nondisk_lightdata =
        (struct gator_lightobj *)(a_srvline->srvName_lp->o_data);
    nondisk_strparams = (struct gwin_strparams *)(nondisk_lightdata->llrock);
    nondisk_strparams->y = a_linenum;

}                               /*scout_SetNonDiskLightLine */

/*------------------------------------------------------------------------
 * scout_RecomputeLightLocs
 *
 * Description:
 *      Given a pointer to a server record, recompute its disk light
 *      locations (and keep proper track of the number of screen lines
 *      required for the server record).
 *
 * Arguments:
 *      struct mini_line *a_srvline : Ptr to server descriptor.
 *
 * Returns:
 *      0 if anything went wrong,
 *      else the number of lines used by this server record.
 *
 * Environment:
 *      One or more records have joined or left the used light list
 *      for this server.  We're not sure which ones, so we recompute
 *      them all.  We may also have had a width change in the gtx
 *      frame.  The base_line field in the server record is guaranteed
 *      to be correct at this point.
 *
 * Side Effects:
 *      As described.
 *------------------------------------------------------------------------*/

static int
scout_RecomputeLightLocs(struct mini_line *a_srvline)
{                               /*scout_RecomputeLightLocs */

    static char rn[] = "scout_RecomputeLightLocs";      /*Routine name */
    int lights_per_line;        /*# lights/line */
    int lights_this_line;       /*# lights on cur line */
    int curr_idx;               /*Current disk light idx */
    struct scout_disk *sc_disk; /*Ptr to disk record array */
    int lines_for_server;       /*Num lines in server record */
    int curr_line;              /*Current line being filled */
    int curr_x;                 /*Current x value for light */
    struct gator_lightobj *disk_lightdata;      /*Disk light data field */
    struct gwin_strparams *disk_strparams;      /*String params for disk light */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*
     * If we haven't yet computed the column for the leftmost disk light,
     * do it now.
     */
    if (scout_DiskLightLeftCol == 0) {
        int i;
        int num_cols = sizeof(scout_col_width) / sizeof(*scout_col_width);
        scout_DiskLightLeftCol = 0;
        for (i = 0; i < (num_cols - 1); i++) {
            scout_DiskLightLeftCol += scout_col_width[i] + 1;
        }
    }

    /*
     * Calculate how many disk light objects can fit in one line.
     */
    lights_per_line =
        (scout_frameDims.maxx -
         scout_DiskLightLeftCol) / (scout_col_width[COL_DISK] + 1);
    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] %d lights per line\n", rn,
                lights_per_line);
        fflush(scout_debugfd);
    }

    /*
     * Sweep through the used disk light list, computing the location
     * for each.
     */
    lights_this_line = 0;
    curr_idx = a_srvline->used_head;
    lines_for_server = 1;
    curr_line = a_srvline->base_line;
    curr_x = scout_DiskLightLeftCol;

    while (curr_idx != SCOUT_NIL) {
        /*
         * Bump the number of lines for the server if we've already
         * filled up the current line.
         */
        if (lights_this_line >= lights_per_line) {
            lights_this_line = 0;
            lines_for_server++;
            curr_line++;
            curr_x = scout_DiskLightLeftCol;
        }

        /*Current line filled up */
        /*
         * Set the current disk light's location.
         */
        sc_disk = a_srvline->disks;
        sc_disk[curr_idx].disk_lp->o_x = curr_x;
        sc_disk[curr_idx].disk_lp->o_y = curr_line;
        disk_lightdata =
            (struct gator_lightobj *)(sc_disk[curr_idx].disk_lp->o_data);
        disk_strparams = (struct gwin_strparams *)(disk_lightdata->llrock);
        disk_strparams->x = curr_x;
        disk_strparams->y = curr_line;
        if (scout_debug) {
            fprintf(scout_debugfd,
                    "[%s] Disk light at index %d located at [%d, %d]\n", rn,
                    curr_idx, curr_x, curr_line);
            fflush(scout_debugfd);
        }

        /*
         * Record the inclusion of the light and move on to the next
         * light, if any.
         */
        lights_this_line++;
        curr_x += scout_col_width[COL_DISK] + 1;
        curr_idx = sc_disk[curr_idx].next;

    }                           /*Update each used disk light */

    /*
     * Remember to record the (possibly new) number of lines in the
     * server record before returning the value of that field.
     */
    if (a_srvline->num_lines != lines_for_server) {
        if (scout_debug) {
            fprintf(scout_debugfd,
                    "[%s] Server previously had %d screen lines; now changed\n",
                    rn, a_srvline->num_lines);
            fflush(scout_debugfd);
        }
        a_srvline->num_lines = lines_for_server;
    }

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Server has %d screen lines\n", rn,
                a_srvline->num_lines);
        fflush(scout_debugfd);
    }
    return (a_srvline->num_lines);

}                               /*scout_RecomputeLightLocs */

/*------------------------------------------------------------------------
 * scout_FindUsedDisk
 *
 * Description:
 *      Given a single-letter disk name and a pointer to the current server
 *      record, look for a used disk record with that name within the server.
 *      If we can't find one, we create and incorporate one, and return that
 *      fact to our caller.
 *
 * Arguments:
 *      char a_diskname             : Single-char disk name.
 *      struct mini_line *a_srvline : Ptr to server descriptor.
 *      int *a_record_added         : Was a new record added?
 *
 * Returns:
 *      Index of matching used disk record,
 *      SCOUT_NIL otherwise.
 *
 * Return via parameter:
 *      a_record_added set to 1 iff record was added to the used disk list.
 *
 * Environment:
 *      Used disk records are kept in alphabetical order by the single-char
 *      disk name.  Should a matching used disk record not be found, one is
 *      pulled from the free pool.
 *
 * Side Effects:
 *      An entry may be pulled off the free list and inserted into the
 *      used list.  This entry is placed in the update list for the
 *      current gtx frame (at least not by this routine).
 *------------------------------------------------------------------------*/

static int
scout_FindUsedDisk(char *a_diskname, struct mini_line *a_srvline, int *a_record_added)
{                               /*scout_FindUsedDisk */

    static char rn[] = "scout_FindUsedDisk";    /*Routine name */
    int curr_idx;               /*Disk record index */
    int append_idx;             /*Index to append after */
    int new_idx;                /*Index of new used record */
    struct scout_disk *sc_disk; /*Ptr to disk record */
    int code;                   /*Function return value */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*
     * Sweep through the used disk records, looking for a match.
     */
    curr_idx = a_srvline->used_head;
    append_idx = SCOUT_NIL;
    sc_disk = a_srvline->disks;
    if (scout_debug) {
        fprintf(scout_debugfd,
                "[%s] Scanning existing used disk entries for disk '%s'\n",
                rn, a_diskname);
        fflush(scout_debugfd);
    }
    while (curr_idx != SCOUT_NIL) {
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Disk %d is named '%s'\n", rn,
                    curr_idx, sc_disk[curr_idx].name);
            fflush(scout_debugfd);
        }
        if (strcmp(sc_disk[curr_idx].name, a_diskname) == 0) {
            /*
             * We found it!  Bug out.
             */
            if (scout_debug) {
                fprintf(scout_debugfd, "[%s] Match found\n", rn);
                fflush(scout_debugfd);
            }
            return (curr_idx);
        }

        /*
         * If we are alphabetically past the given disk name, we
         * know that we won't find it in the used disk list; we
         * also have the append index set correctly.
         */
        if (strcmp(a_diskname, sc_disk[curr_idx].name) < 0) {
            if (scout_debug) {
                fprintf(scout_debugfd, "[%s] Disk '%s' can't be here\n", rn,
                        a_diskname);
                fflush(scout_debugfd);
            }
            break;
        }

        /*
         * There's still hope we'll find it.  Move on to the next used
         * disk record, keeping this index as the best candidate so far
         * for appending a missing entry.
         */
        append_idx = curr_idx;
        curr_idx = sc_disk[curr_idx].next;
    }                           /*Look for match */

    /*
     * We didn't find the record we wanted, which means we'll pull a
     * record out of the free pool for it.  If we didn't find a place
     * to append it, we then insert it at the beginning of the queue.
     */
    if (a_srvline->free_head == SCOUT_NIL)
        return (SCOUT_NIL);
    *a_record_added = 1;
    new_idx = a_srvline->free_head;
    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Choosing free index %d for new entry\n",
                rn, new_idx);
        fflush(scout_debugfd);
    }
    a_srvline->free_head = sc_disk[new_idx].next;
    if (a_srvline->free_head == SCOUT_NIL)
        a_srvline->free_tail = SCOUT_NIL;

    /*
     * Fill in the new record.
     */
    sc_disk[new_idx].active = 0;
    sc_disk[new_idx].name = a_diskname;

    /*
     * Insert the new record where it belongs on the used disk list.
     */
    if (append_idx == SCOUT_NIL) {
        /*
         * It belongs at the beginning of the list.
         */
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Inserted at used disk head\n", rn);
            fflush(scout_debugfd);
        }
        sc_disk[new_idx].next = a_srvline->used_head;
        sc_disk[new_idx].prev = SCOUT_NIL;
        a_srvline->used_head = new_idx;
        if (a_srvline->used_tail == SCOUT_NIL)
            a_srvline->used_tail = new_idx;
    } else {
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Entry appended after index %d\n", rn,
                    append_idx);
            fflush(scout_debugfd);
        }
        sc_disk[new_idx].prev = append_idx;
        sc_disk[new_idx].next = sc_disk[append_idx].next;
        sc_disk[append_idx].next = new_idx;
        if (sc_disk[new_idx].next == SCOUT_NIL)
            a_srvline->used_tail = new_idx;
        else
            sc_disk[sc_disk[new_idx].next].prev = new_idx;
    };

    /*
     * Add the new used disk light object to the display list for
     * the scout frame.
     */
    if (scout_debug) {
        fprintf(scout_debugfd,
                "[%s] Adding disk light at index %d to display list\n", rn,
                new_idx);
        fflush(scout_debugfd);
    }
    code = gtxframe_AddToList(scout_frame, sc_disk[new_idx].disk_lp);
    if (code) {
        if (scout_debug) {
            fprintf(scout_debugfd,
                    "[%s] Can't add to display list, code is %d\n", rn, code);
            fflush(scout_debugfd);
        }
    }
    return (new_idx);

}                               /*scout_FindUsedDisk */

/*------------------------------------------------------------------------
 * scout_RemoveInactiveDisk
 *
 * Description:
 *      Given a server record and a used disk index, remove the disk
 *      record from the used list, put it on the free list, and remove
 *      it from the gtx frame update list.
 *
 * Arguments:
 *      struct mini_line *a_srvline     : Ptr to server descriptor.
 *      int a_used_idx                  : Index of used disk record.
 *
 * Returns:
 *      Nothing.
 *
 * Environment:
 *      Formerly-used disk records are returned to the free pool.
 *
 * Side Effects:
 *      Free and used disk record lists are modified for this server.
 *      The disk record in question is pulled off the gtx update list
 *      for the frame.
 *------------------------------------------------------------------------*/

static void
scout_RemoveInactiveDisk(struct mini_line *a_srvline, int a_used_idx)
{                               /*scout_RemoveInactiveDisk */

    static char rn[] = "scout_RemoveInactiveDisk";      /*Routine name */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*code = gtxframe_RemoveFromList(scout_frame->window, lightobj); */

}                               /*scout_RemoveInactiveDisk */

/*------------------------------------------------------------------------
 * mini_PrintDiskStats
 *
 * Description:
 *      Given server indexing and light object information, a pointer
 *      to a set of statistics, and whether the probe that produced these
 *      stats succeeded or not, print out the stats in a nice way.
 *
 * Arguments:
 *      struct mini_line *a_srvline     : Ptr to server descriptor.
 *      struct ProbeViceStatistics *a_stats     : Ptr to current stats.
 *      int a_probeOK                   : Was the probe OK?
 *      int a_width_changed             : Has the frame width changed?
 *      int a_fix_line_num              : Is the line number wrong?
 *      int a_delta_line_num            : Change in line number.
 *
 * Returns:
 *      0 if something went wrong,
 *      else the number of lines taken up by this server record.
 *
 * Environment:
 *      Nothing interesting.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static int
mini_PrintDiskStats(struct mini_line *a_srvline,
                    struct ProbeViceStatistics *a_stats,
                    int a_probeOK, int a_width_changed,
                    int a_fix_line_num, int a_delta_line_num)
{                               /*mini_PrintDiskStats */

    static char rn[] = "mini_PrintDiskStats";   /*Routine name */
    char s[128];                /*String buffer */
    struct onode *curr_disklight;       /*Ptr to current disk light */
    struct onode *srvname_light;        /*Ptr to server name light */
    ViceDisk *curr_diskstat;    /*Ptr to current disk stat */
    int curr_disk;              /*Current disk stat number */
    int used_disk_idx;          /*Used disk index */
    int next_used_idx;          /*Ditto */
    int pastthreshold;          /*Was disk past threshold? */
    struct gator_lightobj *diskdata;    /*Private light data */
    struct gwin_strparams *disk_strparams;      /*String params for disk light */
    char *diskname = 0;         /*Name of disk */
    int found_idx;              /*Idx of matching disk */
    char *srv_name;             /*Server name */
    struct scout_disk *sc_disk; /*Ptr to scout disk desc */
    int fix_light_locs;         /*Recompute disk light locs? */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*
     * Remember the current server's print name, don't recompute light
     * locations yet.
     */
    srvname_light = a_srvline->srvName_lp;
    srv_name = ((struct gator_lightobj *)(srvname_light->o_data))->label;
    fix_light_locs = 0;
    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Value of a_delta_line_num is %d\n", rn,
                a_delta_line_num);
        fflush(scout_debugfd);
    }

    /*
     * If the probe failed, we simply blank out all the used disk
     * objects.  Note: a NON-ZERO value of a_probeOK implies failure.
     */
    if (a_probeOK) {
        used_disk_idx = a_srvline->used_head;
        while (used_disk_idx != SCOUT_NIL) {
            /*
             * Point to the current used disk's light, blank out its
             * contents, and make sure highlighting is turned off.  We
             * also take this opportunity to fix the line numbers if
             * needed.
             */
            curr_disklight = a_srvline->disks[used_disk_idx].disk_lp;
            diskdata = (struct gator_lightobj *)(curr_disklight->o_data);
            if (scout_debug) {
                fprintf(scout_debugfd,
                        "[%s] Prev value of disk light %d: '%s'\n", rn,
                        used_disk_idx, diskdata->label);
                fflush(scout_debugfd);
            }
            mini_justify(" ",   /*Src buffer */
                         diskdata->label,       /*Dest buffer */
                         scout_col_width[COL_DISK],     /*Dest's width */
                         SCOUT_RIGHT_JUSTIFY,   /*Right-justify */
                         SCOUT_LEFT_TRUNC,      /*Left-truncate */
                         SCOUT_ISNT_LDISK);     /*Not a labeled disk */
            gator_light_set(curr_disklight, 0);
            if (a_fix_line_num) {
                curr_disklight->o_y += a_delta_line_num;
                disk_strparams = (struct gwin_strparams *)(diskdata->llrock);
                disk_strparams->y += a_delta_line_num;
            }

            /*
             * Advance to next used disk, if any.
             */
            used_disk_idx = a_srvline->disks[used_disk_idx].next;

        }                       /*Blank out disk name field */

        /*
         * If the frame width has changed, we have to recompute all disk
         * light locations.  After that, the number of lines in the server
         * record will be accurate, and we return them.
         */
        if (a_width_changed)
            scout_RecomputeLightLocs(a_srvline);

        return (a_srvline->num_lines);

    }

    /*Probe failed for the server */
    /*
     * Probe was successful.  Sweep through the statistics records,
     * and put up all values having to do with AFS partitions.  First,
     * mark all used disk objects for this server as inactive and fix
     * their line numbers if needed.
     */
    used_disk_idx = a_srvline->used_head;
    while (used_disk_idx != SCOUT_NIL) {
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Marking used disk %d inactive\n", rn,
                    used_disk_idx);
            fflush(scout_debugfd);
        }
        sc_disk = (a_srvline->disks) + used_disk_idx;
        sc_disk->active = 0;
        used_disk_idx = sc_disk->next;
        if (a_fix_line_num) {
            sc_disk->disk_lp->o_y += a_delta_line_num;
            diskdata = (struct gator_lightobj *)(sc_disk->disk_lp->o_data);
            disk_strparams = (struct gwin_strparams *)(diskdata->llrock);
            disk_strparams->y += a_delta_line_num;
        }
    }                           /*Mark used disks inactive */

    curr_diskstat = (ViceDisk *) a_stats->Disk;
    for (curr_disk = 0; curr_disk < VOLMAXPARTS; curr_disk++) {
        /*
         * An AFS partition name must be prefixed by `/vicep`.
         */
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Disk stats at %p for disk '%s'\n",
                    rn, curr_diskstat, curr_diskstat->Name);
            fflush(scout_debugfd);
        }
        if (strncmp("/vice", curr_diskstat->Name, 5) == 0) {
            /*
             * Pull out the single-letter name (actually, abbreviation)
             * of the disk and look for such an entry in the used disks.
             */
            diskname = &curr_diskstat->Name[6];
            found_idx = scout_FindUsedDisk(diskname,    /*1-char name */
                                           a_srvline,   /*Server record */
                                           &fix_light_locs);    /*Recompute? */
            if (found_idx == SCOUT_NIL) {
                fprintf(stderr,
                        "[%s] Can't display /vicep%s on server '%s'\n", rn,
                        diskname, srv_name);
            } else {
                /*
                 * Found (or created) record for this disk.  Fill in the single-
                 * letter name of the disk followed by the number of free blocks.
                 * Turn the disk light on if the number of free blocks exceeds
                 * the threshold the user set, either % used or min free blocks.
                 */
                sprintf(s, "%s:%d", diskname, curr_diskstat->BlocksAvailable);
                if (scout_attn_disk_mode == SCOUT_DISKM_PCUSED) {
                    if ((float)
                        (curr_diskstat->TotalBlocks -
                         curr_diskstat->BlocksAvailable) /
                        (float)(curr_diskstat->TotalBlocks) >
                        scout_attn_disk_pcused)
                        pastthreshold = 1;
                    else
                        pastthreshold = 0;
                } else
                    pastthreshold =
                        (curr_diskstat->BlocksAvailable <
                         scout_attn_disk_minfree) ? 1 : 0;
                sc_disk = (a_srvline->disks) + found_idx;
                sc_disk->active = 1;
                diskdata =
                    (struct gator_lightobj *)(sc_disk->disk_lp->o_data);
                if (scout_debug) {
                    fprintf(scout_debugfd,
                            "[%s] Justifying %s for disk idx %d (prev value: '%s')\n",
                            rn, s, found_idx, diskdata->label);
                    fflush(scout_debugfd);
                }
                mini_justify(s, /*Src buffer */
                             diskdata->label,   /*Dest buffer */
                             scout_col_width[COL_DISK], /*Dest's width */
                             SCOUT_LEFT_JUSTIFY,        /*Left-justify */
                             SCOUT_LEFT_TRUNC,  /*Left-truncate */
                             SCOUT_IS_LDISK);   /*Labeled disk */

                gator_light_set(sc_disk->disk_lp, pastthreshold);

            }                   /*Found disk record */
        }

        /*Found AFS disk name */
        /*
         * Advance to the next disk statistics record.
         */
        curr_diskstat++;
    }                           /*For each statistics record */

    /*
     * We've now pulled out all the disk statistics from the probe.
     * See if any used disks that were there from the last time are
     * now gone.  If so, we remove them.
     */
    if (scout_debug) {
        fprintf(scout_debugfd,
                "[%s] Scanning used disk records for inactive entries\n", rn);
        fflush(scout_debugfd);
    }
    used_disk_idx = a_srvline->used_head;
    while (used_disk_idx != SCOUT_NIL) {
        if (scout_debug) {
            fprintf(scout_debugfd, "[%s] Examining entry at index %d\n", rn,
                    used_disk_idx);
            fflush(scout_debugfd);
        }
        sc_disk = (a_srvline->disks) + used_disk_idx;
        next_used_idx = sc_disk->next;
        if (!(sc_disk->active)) {
            scout_RemoveInactiveDisk(a_srvline, /*Server record */
                                     used_disk_idx);    /*Disk index to nuke */
            fix_light_locs = 1;
        }
        used_disk_idx = next_used_idx;

    }                           /*Remove inactive used disks */

    /*
     * If we've had to add or remove disks to/from the used list,
     * or if the frame width has changed, we recompute the light
     * locations before returning.
     */
    if (fix_light_locs || a_width_changed)
        scout_RecomputeLightLocs(a_srvline);

    /*
     * Return the (possibly new) size of the current server record.
     */
    return (a_srvline->num_lines);

}                               /*mini_PrintDiskStats */

/*------------------------------------------------------------------------
 * FS_Handler
 *
 * Description:
 *      Handler routine passed to the fsprobe module.  This handler is
 *      called immediately after a poll of all the FileServers has taken
 *      place.  Its job is to write out selected data to the scout
 *      screen.
 *
 * Arguments:
 *      None.
 *
 * Returns:
 *      0 on success,
 *      -1 otherwise.
 *
 * Environment:
 *      All it needs to know is exported by the fsprobe module, namely
 *      the data structure where the probe results are stored.
 *
 * Side Effects:
 *      Recomputes disk light locations in response to reshaping the
 *      scout window or from adding/deleting disk lights to/from
 *      individual servers.
 *------------------------------------------------------------------------*/

int
FS_Handler(void)
{                               /*FS_Handler */

    static char rn[] = "FS_Handler";    /*Routine name */
    int code;                   /*Return code */
    struct ProbeViceStatistics *curr_stats;     /*Ptr to current stats */
    int *curr_probeOK;          /*Ptr to current probeOK field */
    int curr_srvidx;            /*Current server index */
    char s[128];                /*String buffer */
    static char sblank[] = " "; /*Blank string buffer */
    char *sp;                   /*Ptr to string buffer */
    struct mini_line *curr_line;        /*Current mini-line */
    int curr_line_num;          /*Current line number */
    struct gator_lightobj *lightdata;   /*Private light data */
    int setting;                /*Light setting (on or off) */
    int old_width;              /*Keep the old width value */
    int width_changed;          /*Has the frame width changed? */
    int fix_line_num;           /*Line number needs fixing */
    int delta_line_num;         /*Change in line number */

    /*
     * See if the size of the scout frame has changed since the last
     * time.
     */
    old_width = scout_frameDims.maxx;
    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Calling wop_getdimensions\n", rn);
        fflush(scout_debugfd);
    }
    WOP_GETDIMENSIONS(scout_frame->window, &scout_frameDims);
    width_changed = (old_width == scout_frameDims.maxx) ? 0 : 1;
    if (scout_debug) {
        fprintf(scout_debugfd,
                "[%s] Frame dimensions are %d rows, %d columns\n", rn,
                scout_frameDims.maxy, scout_frameDims.maxx);
        if (width_changed)
            fprintf(scout_debugfd, "[%s] Width has changed from %d columns\n",
                    rn, old_width);
        fflush(scout_debugfd);
    }

    /*
     * Print out the selected fields for each server.  We actually change
     * the light's label to the new data.
     */
    curr_line = scout_screen.line;
    curr_stats = fsprobe_Results.stats;
    curr_probeOK = fsprobe_Results.probeOK;
    curr_line_num = curr_line->base_line;

    for (curr_srvidx = 0; curr_srvidx < scout_screen.numServers;
         curr_srvidx++) {
        /*
         * If the current server record is set up on the wrong line, fix
         * the non-disk light objects directly, and remember to fix the
         * disk light objects later on.
         */
        if (curr_line->base_line != curr_line_num) {
            fix_line_num = 1;
            delta_line_num = curr_line_num - curr_line->base_line;
            curr_line->base_line = curr_line_num;
            scout_SetNonDiskLightLine(curr_line, curr_line_num);
        } else {
            fix_line_num = 0;
            delta_line_num = 0;
        }

        lightdata =
            (struct gator_lightobj *)(curr_line->currConns_lp->o_data);
        if (*curr_probeOK == 0) {
            sp = s;
            sprintf(sp, "%d", curr_stats->CurrentConnections);
        } else
            sp = sblank;
        mini_justify(sp,        /*Src buffer */
                     lightdata->label,  /*Dest buffer */
                     scout_col_width[COL_CONN], /*Dest's width */
                     SCOUT_RIGHT_JUSTIFY,       /*Right-justify */
                     SCOUT_LEFT_TRUNC,  /*Left-truncate */
                     SCOUT_ISNT_LDISK); /*Not a labeled disk */
        if (scout_attn_conn != SCOUT_ATTN_NOTUSED
            && curr_stats->CurrentConnections >= scout_attn_conn)
            setting = 1;
        else
            setting = 0;
        gator_light_set(curr_line->currConns_lp, setting);

        lightdata = (struct gator_lightobj *)(curr_line->fetches_lp->o_data);
        if (*curr_probeOK == 0) {
            sp = s;
            sprintf(sp, "%u", curr_stats->TotalFetchs);
        } else
            sp = sblank;
        mini_justify(sp,        /*Src buffer */
                     lightdata->label,  /*Dest buffer */
                     scout_col_width[COL_FETCH],        /*Dest's width */
                     SCOUT_RIGHT_JUSTIFY,       /*Right-justify */
                     SCOUT_LEFT_TRUNC,  /*Left-truncate */
                     SCOUT_ISNT_LDISK); /*Not a labeled disk */
        if (scout_attn_fetch != SCOUT_ATTN_NOTUSED
            && curr_stats->TotalFetchs >= scout_attn_fetch)
            setting = 1;
        else
            setting = 0;
        gator_light_set(curr_line->fetches_lp, setting);

        lightdata = (struct gator_lightobj *)(curr_line->stores_lp->o_data);
        if (*curr_probeOK == 0) {
            sp = s;
            sprintf(sp, "%u", curr_stats->TotalStores);
        } else
            sp = sblank;
        mini_justify(sp,        /*Src buffer */
                     lightdata->label,  /*Dest buffer */
                     scout_col_width[COL_STORE],        /*Dest's width */
                     SCOUT_RIGHT_JUSTIFY,       /*Right-justify */
                     SCOUT_LEFT_TRUNC,  /*Left-truncate */
                     SCOUT_ISNT_LDISK); /*Not a labeled disk */
        if (scout_attn_store != SCOUT_ATTN_NOTUSED
            && curr_stats->TotalStores >= scout_attn_store)
            setting = 1;
        else
            setting = 0;
        gator_light_set(curr_line->stores_lp, setting);

        lightdata =
            (struct gator_lightobj *)(curr_line->workstations_lp->o_data);
        if (*curr_probeOK == 0) {
            sp = s;
            sprintf(sp, "%d", curr_stats->WorkStations);
        } else
            sp = sblank;
        mini_justify(sp,        /*Src buffer */
                     lightdata->label,  /*Dest buffer */
                     scout_col_width[COL_WK],   /*Dest's width */
                     SCOUT_RIGHT_JUSTIFY,       /*Right-justify */
                     SCOUT_LEFT_TRUNC,  /*Left-truncate */
                     SCOUT_ISNT_LDISK); /*Not a labeled disk */
        if (scout_attn_workstations != SCOUT_ATTN_NOTUSED
            && curr_stats->WorkStations >= scout_attn_workstations)
            setting = 1;
        else
            setting = 0;
        gator_light_set(curr_line->workstations_lp, setting);

        /*
         * We turn the server light on if there was an error in the
         * current probe (e.g., if the curr_probeOK field is non-zero.
         * (Don't forget to fix the light's line if it needs it).
         */
        setting = (*curr_probeOK) ? 1 : 0;
        gator_light_set(curr_line->srvName_lp, setting);

        /*
         * Print out the disk statistics.  The value returned is the
         * number of lines taken up by the server record (or 0 if
         * something went wrong).
         */
        code = mini_PrintDiskStats(curr_line,   /*Ptr to server line */
                                   curr_stats,  /*Fresh disk stats */
                                   *curr_probeOK,       /*Was probe OK? */
                                   width_changed,       /*Has the width changed? */
                                   fix_line_num,        /*Fix the line number? */
                                   delta_line_num);     /*Change in line number */
        if (code == 0) {
            fprintf(stderr, "[%s] Error in printing out disk statistics\n",
                    rn);
            return (-1);
        } else
            curr_line_num += code;

        /*
         * Advance the current mini_line, stats source, and probe success
         * indication.
         */
        curr_line++;
        curr_stats++;
        curr_probeOK++;

    }                           /*for each server probed */

    /*
     * Display the scout frame.
     */
    sprintf(s, "Probe %d results", fsprobe_Results.probeNum);
    gtxframe_DisplayString(scout_frame, s);
    WOP_DISPLAY(scout_gwin);

    /*
     * Return the happy news.
     */
    return (0);

}                               /*FS_Handler */

/*------------------------------------------------------------------------
 * init_mini_line
 *
 * Description:
 *      Initialize each line in the mini_screen.
 *
 * Arguments:
 *      struct sockaddr_in *a_skt : Ptr to server socket info.
 *      int a_lineNum;            : Line number being created.
 *      struct mini_line *a_line  : Ptr to mini_line to set up.
 *      char *a_srvname           : Printable server name.
 *
 * Returns:
 *      0 on success,
 *      Error value otherwise.
 *
 * Environment:
 *      Nothing interesting.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static int
init_mini_line(struct sockaddr_in *a_skt, int a_lineNum,
               struct mini_line *a_line, char *a_srvname)
{                               /*init_mini_line */

    static char rn[] = "init_mini_line";        /*Routine name */
    int curr_x;                 /*Current X position */
    int curr_y;                 /*Current Y position */
    char s[128];                /*Scratch buffer */
    int code;                   /*Return code */
    struct gator_lightobj *lightdata;   /*Private light data */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called for base line %d\n", rn,
                a_lineNum);
        fflush(scout_debugfd);
    }

    /*
     * Fill in the top fields (except the disk fields, which will be
     * done elsewhere), then create the light onodes.
     */
    memcpy((char *)&(a_line->skt), (char *)a_skt, sizeof(struct sockaddr_in));
    a_line->numDisks = 0;
    a_line->base_line = a_lineNum + scout_screen.base_line_num;
    a_line->num_lines = 1;

    curr_x = 1;
    curr_y = a_line->base_line;
    if ((a_line->currConns_lp =
         mini_initLightObject("Conns", curr_x, curr_y, scout_col_width[COL_CONN],
                              scout_gwin))
        == NULL) {
        fprintf(stderr, "[%s:%s] Can't create currConns light object\n", pn,
                rn);
        return (-1);
    }
    curr_x += scout_col_width[COL_CONN] + 1;

    if ((a_line->fetches_lp =
         mini_initLightObject("Fetches", curr_x, curr_y, scout_col_width[COL_FETCH],
                              scout_frame->window))
        == NULL) {
        fprintf(stderr, "[%s:%s] Can't create fetches light object\n", pn,
                rn);
        return (-1);
    }
    curr_x += scout_col_width[COL_FETCH] + 1;

    if ((a_line->stores_lp =
         mini_initLightObject("Stores", curr_x, curr_y, scout_col_width[COL_STORE],
                              scout_frame->window))
        == NULL) {
        fprintf(stderr, "[%s:%s] Can't create stores light object\n", pn, rn);
        return (-1);
    }
    curr_x += scout_col_width[COL_STORE] + 1;

    if ((a_line->workstations_lp =
         mini_initLightObject("WrkStn", curr_x, curr_y, scout_col_width[COL_WK],
                              scout_frame->window))
        == NULL) {
        fprintf(stderr, "[%s:%s] Can't create workstations light object\n",
                pn, rn);
        return (-1);
    }
    curr_x += scout_col_width[COL_WK] + 1;

    if ((a_line->srvName_lp =
         mini_initLightObject(a_srvname, curr_x, curr_y,
                              scout_col_width[COL_SRVNAME], scout_frame->window))
        == NULL) {
        fprintf(stderr, "[%s:%s] Can't create server name light object\n", pn,
                rn);
        return (-1);
    }
    sprintf(s, "%s", a_srvname);
    lightdata = (struct gator_lightobj *)(a_line->srvName_lp->o_data);
    code = mini_justify(s,      /*Src buffer */
                        lightdata->label,       /*Dest buffer */
                        scout_col_width[COL_SRVNAME],   /*Dest's width */
                        SCOUT_CENTER,   /*Centered */
                        SCOUT_RIGHT_TRUNC,      /*Right-truncate */
                        SCOUT_ISNT_LDISK);      /*Not a labeled disk */
    if (code) {
        fprintf(stderr,
                "[%s] Can't center server name inside of light object\n", rn);
        return (code);
    }

    if (scout_initDiskLightObjects(a_line, scout_frame->window)) {
        fprintf(stderr, "[%s:%s] Can't create disk light objects\n", pn, rn);
        return (-1);
    }

    /*
     * Finally, return the happy news.
     */
    return (0);

}                               /*init_mini_line */

/*------------------------------------------------------------------------
 * execute_scout
 *
 * Description:
 *      Workhorse routine that starts up the FileServer probe.
 *
 * Arguments:
 *      int a_numservers                : Length of above list.
 *      struct cmd_item *a_srvname      : List of FileServer machines to
 *                                        monitor.
 *      int a_pkg                       : Window package to use.
 *
 * Returns:
 *      0 on success,
 *      Error value otherwise.
 *
 * Environment:
 *      Nothing interesting.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static int
execute_scout(int a_numservers, struct cmd_item *a_srvname, int a_pkg)
{                               /*execute_scout */

    static char rn[] = "execute_scout"; /*Routine name */
    static char fullsrvname[128];       /*Full server name */
    int code;           /*Return code */
    struct sockaddr_in *FSSktArray;     /*Server socket array */
    int sktbytes;               /*Num bytes in above */
    struct sockaddr_in *curr_skt;       /*Ptr to current socket */
    struct cmd_item *curr_item; /*Ptr to current cmd item */
    struct hostent *he;         /*Host entry */
    struct mini_line *mini_lines;       /*Ptr to all mini-lines */
    struct mini_line *curr_line;        /*Ptr to current line */
    int i;                      /*Generic loop variable */
    int mini_line_bytes;        /*Num bytes in mini_lines */
    struct timeval tv;          /*Time structure */
    int linenum;                /*Current mini-line number */
#if 0
    PROCESS pid;                /*Main LWP process ID */
    PROCESS gxlistener_ID;      /*Input Server LWP process ID */
#endif /* 0 */
    struct gator_lightobj *lightdata;   /*Private light data */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    /*
     * We have to initialize LWP support before we start up any of
     * our packages.
     */
#if 0
    code = LWP_InitializeProcessSupport(LWP_NORMAL_PRIORITY, &pid);
    if (code) {
        fprintf(stderr, "[%s:%s] Can't initialize LWP\n", pn, rn);
        scout_CleanExit(code);
    }
#endif /* 0 */

    /*
     * Initialize the gtx package.
     */
#if 0
    fprintf(stderr, "[%s:%s] Starting up gtx package\n", pn, rn);
#endif /* 0 */
    scout_gwin = gtx_Init(0,    /*Don't start up InputServer yet */
                          -1);  /*Type of window package */
    if (scout_gwin == NULL) {
        fprintf(stderr, "[%s:%s] Call to gtx_Init() failed!\n", pn, rn);
        return (-1);
    }

    /*
     * Remember we've set up gtx so we can exit cleanly from now on.
     */
    scout_gtx_initialized = 1;

    /*
     * Create the frame everything will go into, set it up as our only
     * frame for this window.
     */
    scout_frame = gtxframe_Create();
    if (scout_frame == (struct gtx_frame *)0) {
        fprintf(stderr, "[%s:%s] Call to gtxframe_Create() failed!\n", pn,
                rn);
        return (-1);
    }
    gtxframe_SetFrame(scout_gwin, scout_frame);
    WOP_GETDIMENSIONS(scout_frame->window, &scout_frameDims);

    /*
     * Allocate an array of sockets to describe each FileServer we'll be
     * watching.
     */
    sktbytes = a_numservers * sizeof(struct sockaddr_in);
    FSSktArray = calloc(1, sktbytes);
    if (FSSktArray == (struct sockaddr_in *)0) {
        fprintf(stderr,
                "[%s] Can't malloc() %d sockaddrs (%d bytes) for the given servers\n",
                rn, a_numservers, sktbytes);
        scout_CleanExit(-1);
    }

    /*
     * Sweep through the server names provided, filling in the socket
     * info for each.  Take into account the fact that we may have a
     * base name associated for each.
     */
    curr_item = a_srvname;
    curr_skt = FSSktArray;
    while (curr_item) {
        if (*scout_basename == '\0')
            sprintf(fullsrvname, "%s", curr_item->data);
        else
            sprintf(fullsrvname, "%s.%s", curr_item->data, scout_basename);
        he = hostutil_GetHostByName(fullsrvname);
        if (he == NULL) {
            fprintf(stderr, "[%s] Can't get host info for '%s'\n", rn,
                    fullsrvname);
            return (-1);
        }
        memcpy(&(curr_skt->sin_addr.s_addr), he->h_addr, 4);
        curr_skt->sin_family = AF_INET;
        curr_skt->sin_port = htons(7000);       /* FileServer port */

        /*
         * Bump our pointers.
         */
        curr_item = curr_item->next;
        curr_skt++;

    }                           /*Build socket entry for each server */

    /*
     * Create the set of mini-lines, one per server.
     */
    mini_line_bytes = a_numservers * sizeof(struct mini_line);
    mini_lines = calloc(1, mini_line_bytes);
    if (mini_lines == (struct mini_line *)0) {
        fprintf(stderr, "[%s] Can't malloc() %d bytes for %d screen lines\n",
                rn, mini_line_bytes, a_numservers);
        return (-1);
    }

    /*
     * Set up each line in the mini_lines, creating and initializing
     * its light objects.
     */
    scout_screen.base_line_num = 4;
    curr_line = mini_lines;
    curr_skt = FSSktArray;
    linenum = 0;
    curr_item = a_srvname;
    gtxframe_ClearList(scout_frame);

    /*
     * Create the light objects that server as banner lines.  Remember
     * to take into account the server basename, if any, and the name
     * of the host that scout if running on, if that's wanted.
     */
    if (scout_showhostname) {
        if (*scout_basename == '\0')
            sprintf(scout_Banner, "[%s] %s", scout_hostname, "Scout");
        else
            sprintf(scout_Banner, "[%s] Scout for %s", scout_hostname,
                    scout_basename);
    } else {
        if (*scout_basename == '\0')
            sprintf(scout_Banner, "%s", " Scout");
        else
            sprintf(scout_Banner, " Scout for %s", scout_basename);
    }
    scout_banner0_lp = mini_initLightObject("Banner 0", /*Light name */
                                            0, /*X*/ 0, /*Y*/ scout_frameDims.maxx,     /*Width */
                                            scout_gwin);        /*Window */
    if (scout_banner0_lp != NULL) {
        lightdata = (struct gator_lightobj *)(scout_banner0_lp->o_data);
        mini_justify(scout_Banner, lightdata->label, scout_frameDims.maxx,
                     SCOUT_CENTER, SCOUT_RIGHT_TRUNC, SCOUT_ISNT_LDISK);
        gator_light_set(scout_banner0_lp, 1);
        gtxframe_AddToList(scout_frame, scout_banner0_lp);

        /*Debugging */
        if (scout_debug)
            fprintf(scout_debugfd, "[%s] Scout label is '%s', %" AFS_SIZET_FMT " chars\n", rn,
                    lightdata->label, strlen(lightdata->label));
    }

    scout_banner1_lp = mini_initLightObject("Banner 1", /*Light name */
                                            0, /*X*/ 2, /*Y*/ scout_frameDims.maxx,     /*Width */
                                            scout_gwin);        /*Window */
    if (scout_banner1_lp != NULL) {
        char attn_label[256];
        if (scout_attn_disk_mode == SCOUT_DISKM_PCUSED) {
            snprintf(attn_label, sizeof(attn_label), "%s: > %s%% used",
                     scout_label[5], scout_attn_disk_pcusedstr);
        } else {
            snprintf(attn_label, sizeof(attn_label), "%s: < %d blocks free",
                     scout_label[5], scout_attn_disk_minfree);
        }
        snprintf(scout_Banner, sizeof(scout_Banner),
                 "%*s %*s %*s %*s %*s %s",
                 scout_col_width[0], scout_label[0],
                 scout_col_width[1], scout_label[1],
                 scout_col_width[2], scout_label[2],
                 scout_col_width[3], scout_label[3],
                 scout_col_width[4], scout_label[4],
                 attn_label);

        lightdata = (struct gator_lightobj *)(scout_banner1_lp->o_data);
        mini_justify(scout_Banner, lightdata->label, scout_frameDims.maxx,
                     SCOUT_LEFT_JUSTIFY, SCOUT_RIGHT_TRUNC,
                     SCOUT_ISNT_LDISK);

        gtxframe_AddToList(scout_frame, scout_banner1_lp);
    }

    scout_banner2_lp = mini_initLightObject("Banner 2", /*Light name */
                                            0, /*X*/ 3, /*Y*/ scout_frameDims.maxx,     /*Width */
                                            scout_gwin);        /*Window */
    if (scout_banner2_lp != NULL) {
        snprintf(scout_Banner, sizeof(scout_Banner),
                 "%*s %*s %*s %*s %*s %s",
                 scout_col_width[0], scout_underline[0],
                 scout_col_width[1], scout_underline[1],
                 scout_col_width[2], scout_underline[2],
                 scout_col_width[3], scout_underline[3],
                 scout_col_width[4], scout_underline[4],
                 scout_underline[5]);

        lightdata = (struct gator_lightobj *)(scout_banner2_lp->o_data);
        mini_justify(scout_Banner, lightdata->label,
                     scout_frameDims.maxx, SCOUT_LEFT_JUSTIFY,
                     SCOUT_RIGHT_TRUNC, SCOUT_ISNT_LDISK);
        gtxframe_AddToList(scout_frame, scout_banner2_lp);
    }

    for (i = 0; i < a_numservers; i++) {
        code = init_mini_line(curr_skt, linenum, curr_line, curr_item->data);
        if (code) {
            fprintf(stderr, "[%s] Can't initialize line for server %d\n", rn,
                    i);
            return (-1);
        }
        curr_skt++;
        curr_line++;
        linenum++;
        curr_item = curr_item->next;
    }

    /*
     * Now that all lines have been set up, we feed in the light items
     * created.  Note: the disk lights are entered at a later time,
     * as they enter the used disk list for each server.
     */
    curr_line = mini_lines;
    for (i = 0; i < a_numservers; i++) {
        code = gtxframe_AddToList(scout_frame, curr_line->currConns_lp);
        if (code) {
            fprintf(stderr,
                    "[%s] Can't add client connections light to display list\n",
                    rn);
            return (code);
        }

        code = gtxframe_AddToList(scout_frame, curr_line->fetches_lp);
        if (code) {
            fprintf(stderr,
                    "[%s] Can't add fetches light to frame display list\n",
                    rn);
            return (code);
        }

        code = gtxframe_AddToList(scout_frame, curr_line->stores_lp);
        if (code) {
            fprintf(stderr,
                    "[%s] Can't add stores light to frame display list\n",
                    rn);
            return (code);
        }

        code = gtxframe_AddToList(scout_frame, curr_line->workstations_lp);
        if (code) {
            fprintf(stderr,
                    "[%s] Can't add workstation light to display list\n", rn);
            return (code);
        }

        code = gtxframe_AddToList(scout_frame, curr_line->srvName_lp);
        if (code) {
            fprintf(stderr,
                    "[%s] Can't add server name light to display list\n", rn);
            return (code);
        }

        /*
         * Move down to the next server record.
         */
        curr_line++;

    }                           /*Add lights in server records to display list */

#if 0
    /*
     * Set up the minimal keymap.
     */
    code = keymap_BindToString(scout_frame->keymap,     /*Ptr to keymap */
                               "e",     /*Key to bind */
                               ExitCmd, /*Cmd to execute */
                               NULL,    /*Name */
                               NULL);   /*Ptr to rock */
    if (code) {
        fprintf(stderr, "[%s] Can't bind key `e', code is %d\n", rn, code);
        return (code);
    }
#endif /* 0 */

    /*
     * Finish setting up the overall mini_screen structure.
     */
    scout_screen.numServers = a_numservers;
    scout_screen.line = mini_lines;
    WOP_GETDIMENSIONS(scout_frame->window, &scout_frameDims);

    /*
     * Start up the fsprobe package, which will gather FileServer
     * statistics for us on a regular basis.
     */
    gtxframe_DisplayString(scout_frame,
                           "Establishing File Server connection(s)...");
    code = fsprobe_Init(a_numservers,   /*Num FileServers to probe */
                        FSSktArray,     /*FileServer socket array */
                        scout_probefreq,        /*Probe frequency */
                        FS_Handler,     /*Handler routine */
                        0);     /*Turn debugging output off */
#if 0
    scout_debug);               /*Turn debugging output off */
#endif /* 0 */
    if (code) {
        fprintf(stderr, "[%s] Error returned by fsprobe_Init: %d\n", rn,
                code);
        return (-1);
    }


    /*
     * Start up the input server LWP for our window.
     */
#if 0
    code = LWP_CreateProcess(gtx_InputServer,   /*Fcn to start up */
                             8192,      /*Stack size in bytes */
                             LWP_NORMAL_PRIORITY,       /*Priority */
                             (void *)scout_gwin,        /*Params: Ptr to window */
                             "gx-listener",     /*Name to use */
                             &gxlistener_ID);   /*Returned LWP process ID */
#endif /* 0 */

    code = (int)(intptr_t)gtx_InputServer(scout_gwin);
    if (code) {
        fprintf(stderr,
                "[%s] Error exit from gtx_InputServer(), error is %d\n", rn,
                code);
        scout_CleanExit(code);
    }

    /*
     * We fall into a loop, sleeping forever.
     */
    while (1) {
        tv.tv_sec = 60 * 60;    /*Sleep for an hour at a time */
        tv.tv_usec = 0;
        select(0,       /*Num fds */
               0,       /*Descriptors ready for reading */
               0,       /*Descriptors ready for writing */
               0,       /*Descriptors with exceptional conditions */
               &tv);    /*Timeout structure */
    }                           /*Sleep forever */

#if 0
    /*
     * How did we get here?  Oh, well, clean up our windows and
     * return sweetness and light anyway.
     */
    WOP_CLEANUP(&scout_gwin);
    return (0);
#endif /* 0 */

}                               /*execute_scout */

/*------------------------------------------------------------------------
 * countServers
 *
 * Description:
 *      Given a pointer to the list of servers we'll be polling,
 *      compute the length of the list.
 *
 * Arguments:
 *      struct cmd_item *a_firstItem : Ptr to first item in list.
 *
 * Returns:
 *      Length of the above list.
 *
 * Environment:
 *      Nothing interesting.
 *
 * Side Effects:
 *      As advertised.
 *------------------------------------------------------------------------*/

static int countServers(struct cmd_item *a_firstItem)
{                               /*countServers */

    int list_len;               /*List length */
    struct cmd_item *curr_item; /*Ptr to current item */

    list_len = 0;
    curr_item = a_firstItem;

    /*
     * Count 'em up.
     */
    while (curr_item) {
        list_len++;
        curr_item = curr_item->next;
    }

    /*
     * Return our tally.
     */
    return (list_len);

}                               /*countServers */

/*------------------------------------------------------------------------
 * scout_AdoptThresholds
 *
 * Description:
 *      Parse and adopt one or more threshold values, as read off the
 *      command line.
 *
 * Arguments:
 *      struct cmd_item *a_thresh_item : Ptr to item on command-line
 *                                       threshold list.
 *
 * Returns:
 *      Nothing (but may exit the entire program on error!)
 *
 * Environment:
 *      Valid keywords are:
 *          conn, disk, fetch, store, ws
 *      The disk value, if it has a % sign, signifies that attention
 *      will be triggered when the disk is more than that percentage
 *      full; otherwise, it will specify the minimum number of free
 *      blocks.
 *
 * Side Effects:
 *      As specified.
 *------------------------------------------------------------------------*/

static void scout_AdoptThresholds(struct cmd_item *a_thresh_item)
{                               /*scout_AdoptThresholds */

    static char rn[] = "scout_AdoptThresholds"; /*Routine name */
    struct cmd_item *curr_item; /*Current item */
    char *curr_name;            /*Current name half of pair */
    char *curr_value;           /*Current value half of pair */
    int diskval_len;            /*Length of disk attn value */

    curr_item = a_thresh_item;
    while (curr_item) {
        /*
         * If there isn't a corresponding value for the current
         * attention field, bitch & die.
         */
        if (curr_item->next == (struct cmd_item *)0) {
            printf("[%s] No threshold value given for '%s'\n", rn,
                   curr_item->data);
            scout_CleanExit(-1);
        }

        curr_name = curr_item->data;
        curr_value = curr_item->next->data;

        if (strcmp(curr_name, "conn") == 0) {
            if (scout_debug) {
                fprintf(scout_debugfd,
                        "[%s] Setting conn attn value to %d (default %d)\n",
                        rn, atoi(curr_value), scout_attn_conn);
                fflush(scout_debugfd);
            }
            scout_attn_conn = atoi(curr_value);
        } else if (strcmp(curr_name, "disk") == 0) {
            /*
             * If there's a '%' as the last character in the value,
             * we use percentage mode.
             */
            diskval_len = strlen(curr_value);
            if (curr_value[diskval_len - 1] == '%') {
                curr_value[diskval_len - 1] = '\0';
                if (scout_debug) {
                    fprintf(scout_debugfd,
                            "[%s] New disk attn value: 0.%s used (default %f)\n",
                            rn, curr_value, scout_attn_disk_pcused);
                    fflush(scout_debugfd);
                }
                sprintf(scout_attn_disk_pcusedstr, "%s", curr_value);
                scout_attn_disk_pcused =
                    ((float)(atoi(curr_value))) / ((float)(100));
            } /*Percentage mode */
            else {
                if (scout_debug) {
                    fprintf(scout_debugfd,
                            "[%s] New disk attn value: %s min free (default %f)\n",
                            rn, curr_value, scout_attn_disk_pcused);
                    fflush(scout_debugfd);
                }
                scout_attn_disk_mode = SCOUT_DISKM_MINFREE;
                scout_attn_disk_minfree = atoi(curr_value);
            }                   /*Min free blocks mode */
        } else if (strcmp(curr_name, "fetch") == 0) {
            if (scout_debug) {
                fprintf(scout_debugfd,
                        "[%s] Setting fetch attn value to %d (default %d)\n",
                        rn, atoi(curr_value), scout_attn_fetch);
                fflush(scout_debugfd);
            }
            scout_attn_fetch = atoi(curr_value);
        } else if (strcmp(curr_name, "store") == 0) {
            if (scout_debug) {
                fprintf(scout_debugfd,
                        "[%s] Setting store attn value to %d (default %d)\n",
                        rn, atoi(curr_value), scout_attn_store);
                fflush(scout_debugfd);
            }
            scout_attn_store = atoi(curr_value);
        } else if (strcmp(curr_name, "ws") == 0) {
            if (scout_debug) {
                fprintf(scout_debugfd,
                        "[%s] Setting workstation attn value to %d (default %d)\n",
                        rn, atoi(curr_value), scout_attn_workstations);
                fflush(scout_debugfd);
            }
            scout_attn_workstations = atoi(curr_value);
        } else {
            printf("[%s] Unknown attention item: '%s'\n", rn,
                   curr_item->data);
            scout_CleanExit(-1);
        }

        /*
         * Advance past the just-processed pair.
         */
        curr_item = curr_item->next->next;

    }                           /*Interpret each name-value pair */

}                               /*scout_AdoptThresholds */

/**
 * Setup the user specified column widths.
 *
 * The column widths specifies the number of digits which
 * will be displayed without truncation.  The column widths
 * are given in the same order in which they are displayed,
 * from left to right. Not all columns need to be specified
 * on the command line. The default column widths for those
 * columns not specified. Column widths can not be set smaller
 * than the heading underline.
 *
 * @param[in] a_width_item      command line width item list
 */
void
scout_SetColumnWidths(struct cmd_item *a_width_item)
{
    int i;
    int width;
    int num_cols = sizeof(scout_col_width) / sizeof(*scout_col_width);

    for (i = 0; a_width_item && i < num_cols; i++) {
        width = atoi(a_width_item->data);
        if (width > 0) {
            int min_width = strlen(scout_underline[i]);
            if (min_width) {
               width = max(width, min_width);
            }
            scout_col_width[i] = width + 1;
        }
        a_width_item = a_width_item->next;
    }
    if (a_width_item) {
        fprintf(stderr, "Too many values given for -columnwidths\n");
        scout_CleanExit(1);
    }
}

/*------------------------------------------------------------------------
 * scoutInit
 *
 * Description:
 *      Routine called when Scout is invoked, responsible for basic
 *      initialization, command line parsing, and calling the
 *      routine that does all the work.
 *
 * Arguments:
 *      as      : Command syntax descriptor.
 *      arock   : Associated rock (not used here).
 *
 * Returns:
 *      Zero (but may exit the entire program on error!)
 *
 * Environment:
 *      Nothing interesting.
 *
 * Side Effects:
 *      Initializes this program.
 *------------------------------------------------------------------------*/

static int scoutInit(struct cmd_syndesc *as, void *arock)
{                               /*scoutInit */

    static char rn[] = "scoutInit";     /*Routine name */
    int code;                   /*Return code */
    int wpkg_to_use;            /*Window package to use */
    int server_count;           /*Number of servers to watch */
    char *debug_filename;       /*Name of debugging output file */

    if (scout_debug) {
        fprintf(scout_debugfd, "[%s] Called\n", rn);
        fflush(scout_debugfd);
    }

    if (as->parms[P_DEBUG].items != 0) {
        scout_debug = 1;
        debug_filename = as->parms[P_DEBUG].items->data;
        scout_debugfd = fopen(debug_filename, "w");
        if (scout_debugfd == (FILE *) 0) {
            printf("[%s] Can't open debugging file '%s'!\n", rn,
                   debug_filename);
            scout_CleanExit(-1);
        }
        fprintf(scout_debugfd, "[%s] Writing to Scout debugging file '%s'\n",
                rn, debug_filename);
    }
#if 0
    wpkg_to_use = atoi(as->parms[P_PACKAGE].items->data);
#endif /* 0 */
    wpkg_to_use = 2;            /*Always use curses for now */
#if 0
    fprintf(stderr, "[%s:%s] Using graphics package %d: ", pn, rn,
            wpkg_to_use);
    switch (wpkg_to_use) {
    case GATOR_WIN_CURSES:
        fprintf(stderr, "curses\n");
        break;
    case GATOR_WIN_DUMB:
        fprintf(stderr, "dumb terminal\n");
        break;
    case GATOR_WIN_X11:
        fprintf(stderr, "X11\n");
        break;
    default:
        fprintf(stderr, "Illegal graphics package: %d\n", wpkg_to_use);
        scout_CleanExit(-1);
    }                           /*end switch (wpkg_to_use) */
#endif /* 0 */

    if (as->parms[P_FREQ].items != 0)
        scout_probefreq = atoi(as->parms[P_FREQ].items->data);
    else
        scout_probefreq = 60;

    /*
     * See if we've been fed a base server name.
     */
    if (as->parms[P_BASE].items != 0)
        sprintf(scout_basename, "%s", as->parms[P_BASE].items->data);
    else
        *scout_basename = '\0';

    /*
     * Count the number of servers we've been asked to monitor.
     */
    server_count = countServers(as->parms[P_SERVER].items);

    /*
     * Create a line of blanks, a generally-useful thing.
     */
    sprintf(scout_blankline, "%255s", " ");

    /*
     * Pull in the name of the host we're executing on if we've been
     * asked to.  If we can't get the name, we provide a default.
     */
    if (as->parms[P_HOST].items != 0) {
        scout_showhostname = 1;
        *scout_hostname = '\0';
        code = gethostname(scout_hostname, 128);
        if (code)
            sprintf(scout_hostname, "%s", "*No Hostname*");
    }

    /*
     * Pull in any and all attention/highlighting thresholds.
     */
    if (as->parms[P_ATTENTION].items != 0)
        scout_AdoptThresholds(as->parms[P_ATTENTION].items);

    if (as->parms[P_WIDTHS].items != 0) {
        scout_SetColumnWidths(as->parms[P_WIDTHS].items);
    }

    /*
     * Now, drive the sucker.
     */
    code = execute_scout(server_count,  /*Num servers */
                         as->parms[P_SERVER].items,     /*Ptr to srv names */
                         wpkg_to_use);  /*Graphics pkg */
    if (code) {
        fprintf(stderr, "[%s] Error executing scout: %d\n", rn, code);
        scout_CleanExit(-1);
    }

    /*
     * We initialized (and ran) correctly, so return the good news.
     */
    return (0);

}                               /*scoutInit */

#include "AFS_component_version_number.c"

int
main(int argc, char **argv)
{                               /*main */

    afs_int32 code;     /*Return code */
    struct cmd_syndesc *ts;     /*Ptr to cmd line syntax descriptor */

#ifdef  AFS_AIX32_ENV
    /*
     * The following signal action for AIX is necessary so that in case of a
     * crash (i.e. core is generated) we can include the user's data section
     * in the core dump. Unfortunately, by default, only a partial core is
     * generated which, in many cases, isn't too useful.
     */
    struct sigaction nsa;

    sigemptyset(&nsa.sa_mask);
    nsa.sa_handler = SIG_DFL;
    nsa.sa_flags = SA_FULLDUMP;
    sigaction(SIGSEGV, &nsa, NULL);
#endif
    /*
     * Set up the commands we understand.
     */
    ts = cmd_CreateSyntax("initcmd", scoutInit, NULL, 0, "initialize the program");
    cmd_AddParm(ts, "-server", CMD_LIST, CMD_REQUIRED,
                "FileServer name(s) to monitor");
    cmd_AddParm(ts, "-basename", CMD_SINGLE, CMD_OPTIONAL,
                "base server name");
#if 0
    cmd_AddParm(ts, "-package", CMD_SINGLE, CMD_REQUIRED,
                "Graphics package to use");
#endif /* 0 */
    cmd_AddParm(ts, "-frequency", CMD_SINGLE, CMD_OPTIONAL,
                "poll frequency, in seconds");
    cmd_AddParm(ts, "-host", CMD_FLAG, CMD_OPTIONAL,
                "show name of host you're running on");
    cmd_AddParm(ts, "-attention", CMD_LIST, CMD_OPTIONAL,
                "specify attention (highlighting) level");
    cmd_AddParm(ts, "-debug", CMD_SINGLE, CMD_OPTIONAL,
                "turn debugging output on to the named file");
    cmd_AddParm(ts, "-columnwidths", CMD_LIST, CMD_OPTIONAL,
                "specify column widths");

    /*
     * Parse command-line switches & execute the test, then get the heck
     * out of here.
     */
    code = cmd_Dispatch(argc, argv);
    if (code) {
#if 0
        fprintf(stderr, "[%s:%s] Call to cmd_Dispatch() failed; code is %d\n",
                pn, rn, code);
#endif /* 0 */
        scout_CleanExit(1);
    } else
        scout_CleanExit(0);

    return 0; /* not reachable */
}                               /*main */