/* Deal with the X Resource Manager.
- Copyright (C) 1990 Free Software Foundation.
+ Copyright (C) 1990, 1993 Free Software Foundation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
+the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
/* Written by jla, 4/90 */
+#ifdef emacs
+#include <config.h>
+#endif
+
+#include <stdio.h>
+
+#if 1 /* I'd really appreciate it if this code could go away... -JimB */
+/* this avoids lossage in the `dual-universe' headers on AT&T SysV X11 */
+#ifdef USG5
+#define SYSV
+#include <unistd.h>
+#endif /* USG5 */
+
+#endif /* 1 */
+
+/* This should be included before the X include files; otherwise, we get
+ warnings about redefining NULL under BSD 4.3. */
+#include <sys/param.h>
+
#include <X11/Xlib.h>
#include <X11/Xatom.h>
+#if 0
#include <X11/Xos.h>
+#endif
#include <X11/X.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
-#include <sys/param.h>
+#ifdef VMS
+#include "vms-pwd.h"
+#else
#include <pwd.h>
+#endif
#include <sys/stat.h>
-#include <sys/types.h>
-#ifdef emacs
-#include "config.h"
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 256
+#endif
+
+#if !defined(S_ISDIR) && defined(S_IFDIR)
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
extern char *getenv ();
-extern uid_t getuid ();
+
+/* This does cause trouble on AIX. I'm going to take the comment at
+ face value. */
+#if 0
+extern short getuid (); /* If this causes portability problems,
+ I think we should just delete it; it'll
+ default to `int' anyway. */
+#endif
+
+#if defined (__bsdi__) || defined (DECLARE_GETPWUID_WITH_UID_T)
+extern struct passwd *getpwuid (uid_t);
+extern struct passwd *getpwnam (const char *);
+#else
extern struct passwd *getpwuid ();
extern struct passwd *getpwnam ();
+#endif
+
+/* Make sure not to #include anything after these definitions. Let's
+ not step on anyone's prototypes. */
+#ifdef emacs
+#define malloc xmalloc
+#define realloc xrealloc
+#define free xfree
+#endif
+
+char *x_get_string_resource ();
+static int file_p ();
+
+\f
+/* X file search path processing. */
+
+
+/* The string which gets substituted for the %C escape in XFILESEARCHPATH
+ and friends, or zero if none was specified. */
+char *x_customization_string;
+
+
+/* Return the value of the emacs.customization (Emacs.Customization)
+ resource, for later use in search path decoding. If we find no
+ such resource, return zero. */
+char *
+x_get_customization_string (db, name, class)
+ XrmDatabase db;
+ char *name, *class;
+{
+ char *full_name
+ = (char *) alloca (strlen (name) + sizeof ("customization") + 3);
+ char *full_class
+ = (char *) alloca (strlen (class) + sizeof ("Customization") + 3);
+ char *result;
+
+ sprintf (full_name, "%s.%s", name, "customization");
+ sprintf (full_class, "%s.%s", class, "Customization");
+
+ result = x_get_string_resource (db, full_name, full_class);
+
+ if (result)
+ {
+ char *copy = (char *) malloc (strlen (result) + 1);
+ strcpy (copy, result);
+ return copy;
+ }
+ else
+ return 0;
+}
+
+
+/* Expand all the Xt-style %-escapes in STRING, whose length is given
+ by STRING_LEN. Here are the escapes we're supposed to recognize:
+
+ %N The value of the application's class name
+ %T The value of the type parameter ("app-defaults" in this
+ context)
+ %S The value of the suffix parameter ("" in this context)
+ %L The language string associated with the specified display
+ (We use the "LANG" environment variable here, if it's set.)
+ %l The language part of the display's language string
+ (We treat this just like %L. If someone can tell us what
+ we're really supposed to do, dandy.)
+ %t The territory part of the display's language string
+ (This never gets used.)
+ %c The codeset part of the display's language string
+ (This never gets used either.)
+ %C The customization string retrieved from the resource
+ database associated with display.
+ (This is x_customization_string.)
+
+ Return the expanded file name if it exists and is readable, and
+ refers to %L only when the LANG environment variable is set, or
+ otherwise provided by X.
+
+ ESCAPED_SUFFIX and SUFFIX are postpended to STRING if they are
+ non-zero. %-escapes in ESCAPED_SUFFIX are expanded; STRING is left
+ alone.
+
+ Return NULL otherwise. */
static char *
-gethomedir (dirname)
- char *dirname;
+magic_file_p (string, string_len, class, escaped_suffix, suffix)
+ char *string;
+ int string_len;
+ char *class, *escaped_suffix, *suffix;
+{
+ char *lang = getenv ("LANG");
+
+ int path_size = 100;
+ char *path = (char *) malloc (path_size);
+ int path_len = 0;
+
+ char *p = string;
+
+ while (p < string + string_len)
+ {
+ /* The chunk we're about to stick on the end of result. */
+ char *next;
+ int next_len;
+
+ if (*p == '%')
+ {
+ p++;
+
+ if (p >= string + string_len)
+ next_len = 0;
+ else
+ switch (*p)
+ {
+ case '%':
+ next = "%";
+ next_len = 1;
+ break;
+
+ case 'C':
+ next = (x_customization_string
+ ? x_customization_string
+ : "");
+ next_len = strlen (next);
+ break;
+
+ case 'N':
+ next = class;
+ next_len = strlen (class);
+ break;
+
+ case 'T':
+ next = "app-defaults";
+ next_len = strlen (next);
+ break;
+
+ default:
+ case 'S':
+ next_len = 0;
+ break;
+
+ case 'L':
+ case 'l':
+ if (! lang)
+ {
+ free (path);
+ return NULL;
+ }
+
+ next = lang;
+ next_len = strlen (next);
+ break;
+
+ case 't':
+ case 'c':
+ free (path);
+ return NULL;
+ }
+ }
+ else
+ next = p, next_len = 1;
+
+ /* Do we have room for this component followed by a '\0' ? */
+ if (path_len + next_len + 1 > path_size)
+ {
+ path_size = (path_len + next_len + 1) * 2;
+ path = (char *) realloc (path, path_size);
+ }
+
+ bcopy (next, path + path_len, next_len);
+ path_len += next_len;
+
+ p++;
+
+ /* If we've reached the end of the string, append ESCAPED_SUFFIX. */
+ if (p >= string + string_len && escaped_suffix)
+ {
+ string = escaped_suffix;
+ string_len = strlen (string);
+ p = string;
+ escaped_suffix = NULL;
+ }
+ }
+
+ /* Perhaps we should add the SUFFIX now. */
+ if (suffix)
+ {
+ int suffix_len = strlen (suffix);
+
+ if (path_len + suffix_len + 1 > path_size)
+ {
+ path_size = (path_len + suffix_len + 1);
+ path = (char *) realloc (path, path_size);
+ }
+
+ bcopy (suffix, path + path_len, suffix_len);
+ path_len += suffix_len;
+ }
+
+ path[path_len] = '\0';
+
+ if (! file_p (path))
+ {
+ free (path);
+ return NULL;
+ }
+
+ return path;
+}
+
+
+static char *
+gethomedir ()
{
int uid;
struct passwd *pw;
char *ptr;
+ char *copy;
if ((ptr = getenv ("HOME")) == NULL)
{
uid = getuid ();
pw = getpwuid (uid);
}
+
if (pw)
ptr = pw->pw_dir;
- else
- {
- ptr = NULL;
- *dirname = '\0';
- }
}
- if (ptr != NULL)
- strcpy (dirname, ptr);
+ if (ptr == NULL)
+ return "/";
- dirname += strlen (dirname);
- *dirname = '/';
- dirname++;
- *dirname = '\0';
+ copy = (char *) malloc (strlen (ptr) + 2);
+ strcpy (copy, ptr);
+ strcat (copy, "/");
- return dirname;
+ return copy;
}
+
static int
file_p (path)
char *path;
{
struct stat status;
- return (access (path, R_OK) == 0 /* exists and is readable */
+ return (access (path, 4) == 0 /* exists and is readable */
&& stat (path, &status) == 0 /* get the status */
- && (status.st_mode & S_IFDIR) == 0); /* not a directory */
+ && (S_ISDIR (status.st_mode)) == 0); /* not a directory */
}
-#if 0
-#define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/"
-#endif
-/* Isn't this just disgusting? */
+/* Find the first element of SEARCH_PATH which exists and is readable,
+ after expanding the %-escapes. Return 0 if we didn't find any, and
+ the path name of the one we found otherwise. */
-#define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/%L/%T/%N%S:/usr/lib/X11/%l/%T/%N%S:/usr/lib/X11/%T/%N%S"
-
-static int
-decode_magic (string, file, return_path)
- char *string, *file, *return_path;
-{
- char *p = string;
- char *t = return_path;
-
- while (*p)
- {
- if (*p == '%')
- switch (*++p)
- {
- case '%':
- *t++ = '%';
- p++;
- break;
-
- case 'N':
- case 'T':
- case 'S':
- case 'L':
- case 'l':
- case 't':
- case 'c':
- default:
- p++;
- if (*t == '/' && *p == '/')
- p++;
- break;
- }
- else
- *t++ = *p++;
- }
- *t = '\0';
- strcat (return_path, file);
-
- if (file_p (return_path))
- return 1;
-
- return_path[0] = '\0';
- return 0;
-}
-
-static int
-magic_searchpath_decoder (incantation_string, file, return_path)
- char *incantation_string, *return_path, *file;
+static char *
+search_magic_path (search_path, class, escaped_suffix, suffix)
+ char *search_path, *class, *escaped_suffix, *suffix;
{
- register char *s = incantation_string;
- register char *p;
- register char string[MAXPATHLEN];
+ register char *s, *p;
- while (*s)
+ for (s = search_path; *s; s = p)
{
- p = s;
-
- while (*p && *p != ':')
- p++;
-
- if (*p == ':' && *(p + 1) == ':')
+ for (p = s; *p && *p != ':'; p++)
+ ;
+
+ if (p > s)
{
- bcopy ("%N%S", string, 5);
- if (decode_magic (string, file, return_path))
- return 1;
-
- s = p + 1;
- continue;
+ char *path = magic_file_p (s, p - s, class, escaped_suffix, suffix);
+ if (path)
+ return path;
}
-
- if (p > s)
+ else if (*p == ':')
{
- int len = p - s;
+ char *path;
- bcopy (s, string, len);
- string[len + 1] = '\0';
- if (decode_magic (string, file, return_path))
- return 1;
+ s = "%N%S";
+ path = magic_file_p (s, strlen (s), class, escaped_suffix, suffix);
+ if (path)
+ return path;
}
- if (p)
- s = p + 1;
- else
- return 0;
+ if (*p == ':')
+ p++;
}
return 0;
}
\f
+/* Producing databases for individual sources. */
+
+#define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/%L/%T/%N%C%S:/usr/lib/X11/%l/%T/%N%C%S:/usr/lib/X11/%T/%N%C%S:/usr/lib/X11/%L/%T/%N%S:/usr/lib/X11/%l/%T/%N%S:/usr/lib/X11/%T/%N%S"
+
static XrmDatabase
get_system_app (class)
char *class;
{
- XrmDatabase db;
- char path[MAXPATHLEN];
- char *p;
+ XrmDatabase db = NULL;
+ char *path;
- if ((p = getenv ("XFILESEARCHPATH")) == NULL)
- p = X_DEFAULT_SEARCH_PATH;
+ path = getenv ("XFILESEARCHPATH");
+ if (! path) path = X_DEFAULT_SEARCH_PATH;
- if (! magic_searchpath_decoder (p, class, path))
- return NULL;
+ path = search_magic_path (path, class, 0, 0);
+ if (path)
+ {
+ db = XrmGetFileDatabase (path);
+ free (path);
+ }
- db = XrmGetFileDatabase (path);
return db;
}
+
static XrmDatabase
get_fallback (display)
Display *display;
return NULL;
}
+
static XrmDatabase
get_user_app (class)
char *class;
{
- XrmDatabase db;
- char *magic_path;
- char path[MAXPATHLEN];
-
- if ((magic_path = getenv ("XUSERFILESEARCHPATH")) == NULL)
+ char *path;
+ char *file = 0;
+
+ /* Check for XUSERFILESEARCHPATH. It is a path of complete file
+ names, not directories. */
+ if (((path = getenv ("XUSERFILESEARCHPATH"))
+ && (file = search_magic_path (path, class, 0, 0)))
+
+ /* Check for APPLRESDIR; it is a path of directories. In each,
+ we have to search for LANG/CLASS and then CLASS. */
+ || ((path = getenv ("XAPPLRESDIR"))
+ && ((file = search_magic_path (path, class, "/%L/%N", 0))
+ || (file = search_magic_path (path, class, "/%N", 0))))
+
+ /* Check in the home directory. This is a bit of a hack; let's
+ hope one's home directory doesn't contain any %-escapes. */
+ || (path = gethomedir (),
+ ((file = search_magic_path (path, class, "%L/%N", 0))
+ || (file = search_magic_path (path, class, "%N", 0)))))
{
- char homedir[MAXPATHLEN];
- char *default_magic;
- char *p;
-
- gethomedir (homedir);
-
- if ((p = getenv ("XAPPLRESDIR")) == NULL)
- {
- default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N";
- magic_path = (char *) alloca ((3 * strlen (homedir))
- + strlen (default_magic));
- sprintf (magic_path, default_magic, homedir, homedir, homedir);
- }
- else
- {
- default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N:%s/%%N";
- magic_path = (char *) alloca ((3 * strlen (p))
- + strlen (default_magic)
- + strlen (homedir));
- sprintf (magic_path, default_magic, p, p, p, homedir);
- }
+ XrmDatabase db = XrmGetFileDatabase (file);
+ free (file);
+ return db;
}
-
- if (! magic_searchpath_decoder (magic_path, class, path))
+ else
return NULL;
-
- db = XrmGetFileDatabase (path);
- return db;
}
+
static XrmDatabase
get_user_db (display)
Display *display;
XrmDatabase db;
char *xdefs;
+#ifdef PBaseSize /* Cheap way to test for X11R4 or later. */
xdefs = XResourceManagerString (display);
+#else
+ xdefs = display->xdefaults;
+#endif
+
if (xdefs != NULL)
db = XrmGetStringDatabase (xdefs);
else
{
- char xdefault[MAXPATHLEN];
+ char *home;
+ char *xdefault;
- gethomedir (xdefault);
+ home = gethomedir ();
+ xdefault = (char *) malloc (strlen (home) + sizeof (".Xdefaults"));
+ strcpy (xdefault, home);
strcat (xdefault, ".Xdefaults");
db = XrmGetFileDatabase (xdefault);
+ free (home);
+ free (xdefault);
+ }
+
+#ifdef HAVE_XSCREENRESOURCESTRING
+ /* Get the screen-specific resources too. */
+ xdefs = XScreenResourceString (DefaultScreenOfDisplay (display));
+ if (xdefs != NULL)
+ {
+ XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db);
+ XFree (xdefs);
}
+#endif
return db;
}
{
XrmDatabase db;
char *p;
- char path[MAXPATHLEN];
+ char *path = 0, *home = 0, *host = 0;
if ((p = getenv ("XENVIRONMENT")) == NULL)
{
- gethomedir (path);
- strcat (path, ".Xdefaults-");
- gethostname (path + strlen (path), MAXPATHLEN - strlen (path));
+ home = gethomedir ();
+
+ {
+ int host_size = 100;
+ host = (char *) malloc (host_size);
+
+ for (;;)
+ {
+ host[host_size - 1] = '\0';
+ gethostname (host, host_size - 1);
+ if (strlen (host) < host_size - 1)
+ break;
+ host = (char *) realloc (host, host_size *= 2);
+ }
+ }
+
+ path = (char *) malloc (strlen (home)
+ + sizeof (".Xdefaults-")
+ + strlen (host));
+ sprintf (path, "%s%s%s", home, ".Xdefaults-", host);
p = path;
}
db = XrmGetFileDatabase (p);
+
+ if (path) free (path);
+ if (home) free (home);
+ if (host) free (host);
+
return db;
}
\f
+/* External interface. */
+
/* Types of values that we can find in a database */
#define XrmStringType "String" /* String representation */
/* Load X resources based on the display and a possible -xrm option. */
XrmDatabase
-x_load_resources (display, xrm_string, myclass)
+x_load_resources (display, xrm_string, myname, myclass)
Display *display;
- char *xrm_string, *myclass;
+ char *xrm_string, *myname, *myclass;
{
char *xdefs;
+ XrmDatabase user_database;
XrmDatabase rdb;
XrmDatabase db;
XrmInitialize ();
rdb = XrmGetStringDatabase ("");
+ user_database = get_user_db (display);
+
+ /* Figure out what the "customization string" is, so we can use it
+ to decode paths. */
+ if (x_customization_string)
+ free (x_customization_string);
+ x_customization_string
+ = x_get_customization_string (user_database, myname, myclass);
+
/* Get application system defaults */
db = get_system_app (myclass);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* get User defaults */
- db = get_user_db (display);
- if (db != NULL)
- XrmMergeDatabases (db, &rdb);
+ if (user_database != NULL)
+ XrmMergeDatabases (user_database, &rdb);
/* Get Environment defaults. */
db = get_environ_db ();
return rdb;
}
+
/* Retrieve the value of the resource specified by NAME with class CLASS
and of type TYPE from database RDB. The value is returned in RET_VALUE. */
&& (type == expected_type))
{
if (type == x_rm_string)
- (char *) ret_value->addr = value.addr;
+ ret_value->addr = (char *) value.addr;
else
bcopy (value.addr, ret_value->addr, ret_value->size);
return (char *) 0;
}
\f
+/* Stand-alone test facilities. */
+
#ifdef TESTRM
-#include <stdio.h>
-#include "arg-list.h"
+
+typedef char **List;
+#define arg_listify(len, list) (list)
+#define car(list) (*(list))
+#define cdr(list) (list + 1)
+#define NIL(list) (! *(list))
+#define free_arglist(list)
+
+static List
+member (elt, list)
+ char *elt;
+ List list;
+{
+ List p;
+
+ for (p = list; ! NIL (p); p = cdr (p))
+ if (! strcmp (elt, car (p)))
+ return p;
+
+ return p;
+}
static void
fatal (msg, prog, x1, x2, x3, x4, x5)
char **argv;
{
Display *display;
- char *displayname, *resource_string, *class;
+ char *displayname, *resource_string, *class, *name;
XrmDatabase xdb;
- List *arg_list, *lp;
+ List arg_list, lp;
arg_list = arg_listify (argc, argv);
else
class = "Emacs";
- free_arglist (arg_list);
-
+ lp = member ("-n", arg_list);
+ if (! NIL (lp))
+ name = car (cdr (lp));
+ else
+ name = "emacs";
+ free_arglist (arg_list);
if (!(display = XOpenDisplay (displayname)))
fatal ("Can't open display '%s'\n", XDisplayName (displayname));
- xdb = x_load_resources (display, resource_string, class);
+ xdb = x_load_resources (display, resource_string, name, class);
-#if 0
/* In a real program, you'd want to also do this: */
display->db = xdb;
-#endif
while (1)
{
- char line[90];
+ char query_name[90];
+ char query_class[90];
+
+ printf ("Name: ");
+ gets (query_name);
- printf ("String: ");
- gets (line);
- if (strlen (line))
+ if (strlen (query_name))
{
- char *value = x_get_string_resource (xdb, line, class);
+ char *value;
+
+ printf ("Class: ");
+ gets (query_class);
+
+ value = x_get_string_resource (xdb, query_name, query_class);
if (value != NULL)
- printf ("\t%s: %s\n\n", line, value);
+ printf ("\t%s(%s): %s\n\n", query_name, query_class, value);
else
printf ("\tNo Value.\n\n");
}
HCoop / bpt / emacs.git / blobdiff