X-Git-Url: http://git.hcoop.net/bpt/emacs.git/blobdiff_plain/5497dfdb4bec817ca60828f1937ba06d36a4f744..aa0b6932977826d7effb3e4509cf70fee33670bc:/lib-src/emacsclient.c diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c dissimilarity index 67% index c6181bd271..943053b3c0 100644 --- a/lib-src/emacsclient.c +++ b/lib-src/emacsclient.c @@ -1,545 +1,818 @@ -/* Client process that communicates with GNU Emacs acting as server. - Copyright (C) 1986, 1987, 1994 Free Software Foundation, Inc. - -This file is part of GNU Emacs. - -GNU Emacs 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 2, or (at your option) -any later version. - -GNU Emacs is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Emacs; see the file COPYING. If not, write to -the Free Software Foundation, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - - -#define NO_SHORTNAMES -#include <../src/config.h> -#undef read -#undef write -#undef open -#undef close -#undef signal - -#include -#include -#ifdef STDC_HEADERS -#include -#endif -#ifdef HAVE_UNISTD_H -#include -#endif - -char *getenv (), *getwd (); -char *getcwd (); - -/* This is defined with -D from the compilation command, - which extracts it from ../lisp/version.el. */ - -#ifndef VERSION -#define VERSION "unspecified" -#endif - -/* Name used to invoke this program. */ -char *progname; - -/* Nonzero means don't wait for a response from Emacs. --no-wait. */ -int nowait = 0; - -void print_help_and_exit (); - -struct option longopts[] = -{ - { "no-wait", no_argument, NULL, 'n' }, - { "help", no_argument, NULL, 'H' }, - { "version", no_argument, NULL, 'V' }, - { 0 } -}; - -/* Decode the options from argv and argc. - The global variable `optind' will say how many arguments we used up. */ - -void -decode_options (argc, argv) - int argc; - char **argv; -{ - while (1) - { - int opt = getopt_long (argc, argv, - "VHn", longopts, 0); - - if (opt == EOF) - break; - - switch (opt) - { - case 0: - /* If getopt returns 0, then it has already processed a - long-named option. We should do nothing. */ - break; - - case 'n': - nowait = 1; - break; - - case 'V': - fprintf (stderr, "Version %s\n", VERSION); - exit (1); - break; - - case 'H': - default: - print_help_and_exit (); - } - } -} - -void -print_help_and_exit () -{ - fprintf (stderr, - "Usage: %s [-n] [--no-wait] [+LINENUMBER] FILENAME\n", - progname); - fprintf (stderr, - "Report bugs to bug-gnu-emacs@prep.ai.mit.edu.\n"); - exit (1); -} - -/* Return a copy of NAME, inserting a & - before each &, each space, and any initial -. - Change spaces to underscores, too, so that the - return value never contains a space. */ - -char * -quote_file_name (name) - char *name; -{ - char *copy = (char *) malloc (strlen (name) * 2 + 1); - char *p, *q; - - p = name; - q = copy; - while (*p) - { - if (*p == ' ') - { - *q++ = '&'; - *q++ = '_'; - p++; - } - else - { - if (*p == '&' || (*p == '-' && p == name)) - *q++ = '&'; - *q++ = *p++; - } - } - *q++ = 0; - - return copy; -} - -/* Like malloc but get fatal error if memory is exhausted. */ - -long * -xmalloc (size) - unsigned int size; -{ - char *result = (char *) malloc (size); - if (result == NULL) - { - perror ("malloc"); - exit (1); - } - return result; -} - -#if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) - -main (argc, argv) - int argc; - char **argv; -{ - fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n", - argv[0]); - fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n"); - exit (1); -} - -#else /* HAVE_SOCKETS or HAVE_SYSVIPC */ - -#if defined (HAVE_SOCKETS) && ! defined (NO_SOCKETS_IN_FILE_SYSTEM) -/* BSD code is very different from SYSV IPC code */ - -#include -#include -#include -#include -#include - -extern char *strerror (); -extern int errno; - -int -main (argc, argv) - int argc; - char **argv; -{ - char *system_name; - int system_name_length; - int s, i; - FILE *out, *in; - struct sockaddr_un server; - char *homedir, *cwd, *str; - char string[BUFSIZ]; - - progname = argv[0]; - - /* Process options. */ - decode_options (argc, argv); - - if (argc - optind < 1) - print_help_and_exit (); - - /* - * Open up an AF_UNIX socket in this person's home directory - */ - - if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) - { - fprintf (stderr, "%s: ", argv[0]); - perror ("socket"); - exit (1); - } - server.sun_family = AF_UNIX; -#ifndef SERVER_HOME_DIR - { - struct stat statbfr; - system_name_length = 32; - - while (1) - { - system_name = (char *) xmalloc (system_name_length + 1); - - /* system_name must be null-terminated string. */ - system_name[system_name_length] = '\0'; - - if (gethostname (system_name, system_name_length) == 0) - break; - - free (system_name); - system_name_length *= 2; - } - - sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name); - - if (stat (server.sun_path, &statbfr) == -1) - { - if (errno == ENOENT) - fprintf (stderr, - "%s: can't find socket; have you started the server?\n", - argv[0]); - else - fprintf (stderr, "%s: can't stat %s: %s\n", - argv[0], server.sun_path, strerror (errno)); - exit (1); - } - if (statbfr.st_uid != geteuid ()) - { - fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); - exit (1); - } - } -#else - if ((homedir = getenv ("HOME")) == NULL) - { - fprintf (stderr, "%s: No home directory\n", argv[0]); - exit (1); - } - strcpy (server.sun_path, homedir); - strcat (server.sun_path, "/.emacs-server-"); - gethostname (system_name, sizeof (system_name)); - strcat (server.sun_path, system_name); -#endif - - if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) - < 0) - { - fprintf (stderr, "%s: ", argv[0]); - perror ("connect"); - exit (1); - } - - /* We use the stream OUT to send our command to the server. */ - if ((out = fdopen (s, "r+")) == NULL) - { - fprintf (stderr, "%s: ", argv[0]); - perror ("fdopen"); - exit (1); - } - - /* We use the stream IN to read the response. - We used to use just one stream for both output and input - on the socket, but reversing direction works nonportably: - on some systems, the output appears as the first input; - on other systems it does not. */ - if ((in = fdopen (s, "r+")) == NULL) - { - fprintf (stderr, "%s: ", argv[0]); - perror ("fdopen"); - exit (1); - } - -#ifdef BSD_SYSTEM - cwd = getwd (string); -#else - cwd = getcwd (string, sizeof string); -#endif - if (cwd == 0) - { - /* getwd puts message in STRING if it fails. */ - fprintf (stderr, "%s: %s (%s)\n", argv[0], -#ifdef BSD_SYSTEM - string, -#else - "Cannot get current working directory", -#endif - strerror (errno)); - exit (1); - } - - if (nowait) - fprintf (out, "-nowait "); - - for (i = optind; i < argc; i++) - { - if (*argv[i] == '+') - { - char *p = argv[i] + 1; - while (*p >= '0' && *p <= '9') p++; - if (*p != 0) - fprintf (out, "%s/", cwd); - } - else if (*argv[i] != '/') - fprintf (out, "%s/", cwd); - - fprintf (out, "%s ", quote_file_name (argv[i])); - } - fprintf (out, "\n"); - fflush (out); - - /* Maybe wait for an answer. */ - if (nowait) - return 0; - - printf ("Waiting for Emacs..."); - fflush (stdout); - - /* Now, wait for an answer and print any messages. On some systems, - the first line we read will actually be the output we just sent. - We can't predict whether that will happen, so if it does, we - detect it by recognizing `Client: ' at the beginning. */ - - while (str = fgets (string, BUFSIZ, in)) - printf ("%s", str); - - return 0; -} - -#else /* This is the SYSV IPC section */ - -#include -#include -#include -#include -#include -#include -extern int errno; - -char *getwd (), *getcwd (), *getenv (); -struct utsname system_name; - -main (argc, argv) - int argc; - char **argv; -{ - int s; - key_t key; - /* Size of text allocated in MSGP. */ - int size_allocated = BUFSIZ; - /* Amount of text used in MSGP. */ - int used; - struct msgbuf *msgp - = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated); - struct msqid_ds * msg_st; - char *homedir, buf[BUFSIZ]; - char gwdirb[BUFSIZ]; - char *cwd; - char *temp; - - progname = argv[0]; - - /* Process options. */ - decode_options (argc, argv); - - if (argc - optind < 1) - print_help_and_exit (); - - /* - * Create a message queue using ~/.emacs-server as the path for ftok - */ - if ((homedir = getenv ("HOME")) == NULL) - { - fprintf (stderr, "%s: No home directory\n", argv[0]); - exit (1); - } - strcpy (buf, homedir); -#ifndef HAVE_LONG_FILE_NAMES - /* If file names are short, we can't fit the host name. */ - strcat (buf, "/.emacs-server"); -#else - strcat (buf, "/.emacs-server-"); - uname (&system_name); - strcat (buf, system_name.nodename); -#endif - creat (buf, 0600); - key = ftok (buf, 1); /* unlikely to be anyone else using it */ - s = msgget (key, 0600 | IPC_CREAT); - if (s == -1) - { - fprintf (stderr, "%s: ", argv[0]); - perror ("msgget"); - exit (1); - } - - /* Determine working dir, so we can prefix it to all the arguments. */ -#ifdef BSD_SYSTEM - temp = getwd (gwdirb); -#else - temp = getcwd (gwdirb, sizeof gwdirb); -#endif - - cwd = gwdirb; - if (temp != 0) - { - /* On some systems, cwd can look like `@machine/...'; - ignore everything before the first slash in such a case. */ - while (*cwd && *cwd != '/') - cwd++; - strcat (cwd, "/"); - } - else - { -#ifdef BSD_SYSTEM - fprintf (stderr, "%s: %s\n", argv[0], cwd); -#else - fprintf (stderr, "%s: Cannot get current working directory: %s\n", - argv[0], strerror (errno)); -#endif - exit (1); - } - - msgp->mtext[0] = 0; - used = 0; - - if (nowait) - { - strcat (msgp->mtext, "-nowait "); - used += 8; - } - - argc -= optind; - argv += optind; - - while (argc) - { - int need_cwd = 0; - char *modified_arg = argv[0]; - - if (*modified_arg == '+') - { - char *p = modified_arg + 1; - while (*p >= '0' && *p <= '9') p++; - if (*p != 0) - need_cwd = 1; - } - else if (*modified_arg != '/') - need_cwd = 1; - - modified_arg = quote_file_name (modified_arg); - - if (need_cwd) - used += strlen (cwd); - used += strlen (modified_arg) + 1; - while (used + 2 > size_allocated) - { - size_allocated *= 2; - msgp = (struct msgbuf *) realloc (msgp, - (sizeof (struct msgbuf) - + size_allocated)); - } - - if (need_cwd) - strcat (msgp->mtext, cwd); - - strcat (msgp->mtext, modified_arg); - strcat (msgp->mtext, " "); - argv++; argc--; - } - strcat (msgp->mtext, "\n"); -#ifdef HPUX /* HPUX has a bug. */ - if (strlen (msgp->mtext) >= 512) - { - fprintf (stderr, "%s: args too long for msgsnd\n", progname); - exit (1); - } -#endif - msgp->mtype = 1; - if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) - { - fprintf (stderr, "%s: ", progname); - perror ("msgsnd"); - exit (1); - } - - /* Maybe wait for an answer. */ - if (nowait) - return 0; - - printf ("Waiting for Emacs..."); - fflush (stdout); - - msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */ - strcpy (buf, msgp->mtext); - - printf ("\n"); - if (*buf) - printf ("%s\n", buf); - exit (0); -} - -#endif /* HAVE_SYSVIPC */ - -#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */ - -#ifndef HAVE_STRERROR -char * -strerror (errnum) - int errnum; -{ - extern char *sys_errlist[]; - extern int sys_nerr; - - if (errnum >= 0 && errnum < sys_nerr) - return sys_errlist[errnum]; - return (char *) "Unknown error"; -} - -#endif /* ! HAVE_STRERROR */ +/* Client process that communicates with GNU Emacs acting as server. + Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004, + 2005, 2006 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs 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 2, or (at your option) +any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + + +#define NO_SHORTNAMES + +#ifdef HAVE_CONFIG_H +#include +#endif + +#ifdef WINDOWSNT +#define HAVE_SOCKETS +#define NO_SOCKETS_IN_FILE_SYSTEM +#endif + +#ifdef WINDOWSNT +# define HSOCKET SOCKET +# define CLOSE_SOCKET closesocket +# define IOCTL ioctlsocket +# define INITIALIZE() (initialize_sockets ()) +typedef unsigned long IOCTL_BOOL_ARG; +#else +# define HSOCKET int +# define CLOSE_SOCKET close +# define IOCTL ioctl +# define INITIALIZE() +typedef int IOCTL_BOOL_ARG; +#endif + +#undef signal + +#include +#include +#include "getopt.h" +#ifdef HAVE_UNISTD_H +#include +#endif + +#ifdef VMS +# include "vms-pwd.h" +#else /* not VMS */ +#ifdef WINDOWSNT +# include +#else /* not WINDOWSNT */ +# include +#endif /* not WINDOWSNT */ +#endif /* not VMS */ + +char *getenv (), *getwd (); +char *(getcwd) (); + +#ifndef VERSION +#define VERSION "unspecified" +#endif + +#define SEND_STRING(data) (send_to_emacs (s, (data))) +#define SEND_QUOTED(data) (quote_file_name (s, (data))) + +#ifndef EXIT_SUCCESS +#define EXIT_SUCCESS 0 +#endif + +#ifndef EXIT_FAILURE +#define EXIT_FAILURE 1 +#endif + +#ifndef FALSE +#define FALSE 0 +#endif + +#ifndef TRUE +#define TRUE 1 +#endif + +#ifndef NO_RETURN +#define NO_RETURN +#endif + +/* Name used to invoke this program. */ +char *progname; + +/* Nonzero means don't wait for a response from Emacs. --no-wait. */ +int nowait = 0; + +/* Nonzero means args are expressions to be evaluated. --eval. */ +int eval = 0; + +/* The display on which Emacs should work. --display. */ +char *display = NULL; + +/* If non-NULL, the name of an editor to fallback to if the server + is not running. --alternate-editor. */ +const char * alternate_editor = NULL; + +/* If non-NULL, the filename of the UNIX socket. */ +char *socket_name = NULL; + +/* If non-NULL, the filename of the authentication file. */ +char *server_file = NULL; + +void print_help_and_exit () NO_RETURN; + +struct option longopts[] = +{ + { "no-wait", no_argument, NULL, 'n' }, + { "eval", no_argument, NULL, 'e' }, + { "help", no_argument, NULL, 'H' }, + { "version", no_argument, NULL, 'V' }, + { "alternate-editor", required_argument, NULL, 'a' }, + { "socket-name", required_argument, NULL, 's' }, + { "server-file", required_argument, NULL, 'f' }, + { "display", required_argument, NULL, 'd' }, + { 0, 0, 0, 0 } +}; + +/* Decode the options from argv and argc. + The global variable `optind' will say how many arguments we used up. */ + +void +decode_options (argc, argv) + int argc; + char **argv; +{ + alternate_editor = getenv ("ALTERNATE_EDITOR"); + server_file = getenv ("EMACS_SERVER_FILE"); + + while (1) + { + int opt = getopt_long (argc, argv, + "VHnea:s:f:d:", longopts, 0); + + if (opt == EOF) + break; + + switch (opt) + { + case 0: + /* If getopt returns 0, then it has already processed a + long-named option. We should do nothing. */ + break; + + case 'a': + alternate_editor = optarg; + break; + + case 's': + socket_name = optarg; + break; + + case 'f': + server_file = optarg; + break; + + case 'd': + display = optarg; + break; + + case 'n': + nowait = 1; + break; + + case 'e': + eval = 1; + break; + + case 'V': + printf ("emacsclient %s\n", VERSION); + exit (EXIT_SUCCESS); + break; + + case 'H': + print_help_and_exit (); + break; + + default: + fprintf (stderr, "Try `%s --help' for more information\n", progname); + exit (EXIT_FAILURE); + break; + } + } +} + +void +print_help_and_exit () +{ + printf ( + "Usage: %s [OPTIONS] FILE...\n\ +Tell the Emacs server to visit the specified files.\n\ +Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ +\n\ +The following OPTIONS are accepted:\n\ +-V, --version Just print a version info and return\n\ +-H, --help Print this usage information message\n\ +-n, --no-wait Don't wait for the server to return\n\ +-e, --eval Evaluate the FILE arguments as ELisp expressions\n\ +-d, --display=DISPLAY Visit the file in the given display\n" +#ifndef NO_SOCKETS_IN_FILE_SYSTEM +"-s, --socket-name=FILENAME\n\ + Set the filename of the UNIX socket for communication\n" +#endif +"-f, --server-file=FILENAME\n\ + Set the filename of the TCP configuration file\n\ +-a, --alternate-editor=EDITOR\n\ + Editor to fallback to if the server is not running\n\ +\n\ +Report bugs to bug-gnu-emacs@gnu.org.\n", progname); + exit (EXIT_SUCCESS); +} + + +/* + Try to run a different command, or --if no alternate editor is + defined-- exit with an errorcode. +*/ +void +fail (argc, argv) + int argc; + char **argv; +{ + if (alternate_editor) + { + int i = optind - 1; + execvp (alternate_editor, argv + i); + fprintf (stderr, "%s: error executing alternate editor \"%s\"\n", + progname, alternate_editor); + } + else + { + fprintf (stderr, "%s: No socket or alternate editor. Please use:\n\n" +#if !defined (NO_SOCKETS_IN_FILE_SYSTEM) +"\t--socket-name\n" +#endif +"\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ +\t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", + progname); + } + exit (EXIT_FAILURE); +} + + +#if !defined (HAVE_SOCKETS) + +int +main (argc, argv) + int argc; + char **argv; +{ + fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n", + argv[0]); + fprintf (stderr, "on systems with Berkeley sockets.\n"); + + fail (argc, argv); +} + +#else /* HAVE_SOCKETS */ + +#ifdef WINDOWSNT +# include +#else +# include +# include +# include +# include +# include +#endif + +#define AUTH_KEY_LENGTH 64 +#define SEND_BUFFER_SIZE 4096 + +extern char *strerror (); +extern int errno; + +/* Buffer to accumulate data to send in TCP connections. */ +char send_buffer[SEND_BUFFER_SIZE + 1]; +int sblen = 0; /* Fill pointer for the send buffer. */ + +/* Let's send the data to Emacs when either + - the data ends in "\n", or + - the buffer is full (but this shouldn't happen) + Otherwise, we just accumulate it. */ +void send_to_emacs (s, data) + HSOCKET s; + char *data; +{ + while (data) + { + int dlen = strlen (data); + if (dlen + sblen >= SEND_BUFFER_SIZE) + { + int part = SEND_BUFFER_SIZE - sblen; + strncpy (&send_buffer[sblen], data, part); + data += part; + sblen = SEND_BUFFER_SIZE; + } + else if (dlen) + { + strcpy (&send_buffer[sblen], data); + data = NULL; + sblen += dlen; + } + else + break; + + if (sblen == SEND_BUFFER_SIZE + || (sblen > 0 && send_buffer[sblen-1] == '\n')) + { + int sent = send (s, send_buffer, sblen, 0); + if (sent != sblen) + strcpy (send_buffer, &send_buffer[sent]); + sblen -= sent; + } + } +} + +/* In NAME, insert a & before each &, each space, each newline, and + any initial -. Change spaces to underscores, too, so that the + return value never contains a space. */ +void +quote_file_name (s, name) + HSOCKET s; + char *name; +{ + char *copy = (char *) malloc (strlen (name) * 2 + 1); + char *p, *q; + + p = name; + q = copy; + while (*p) + { + if (*p == ' ') + { + *q++ = '&'; + *q++ = '_'; + p++; + } + else if (*p == '\n') + { + *q++ = '&'; + *q++ = 'n'; + p++; + } + else + { + if (*p == '&' || (*p == '-' && p == name)) + *q++ = '&'; + *q++ = *p++; + } + } + *q++ = 0; + + SEND_STRING (copy); + + free (copy); +} + +#ifdef WINDOWSNT +/* Wrapper to make WSACleanup a cdecl, as required by atexit(). */ +void close_winsock () +{ + WSACleanup (); +} + +void initialize_sockets () +{ + WSADATA wsaData; + + /* Initialize the WinSock2 library. */ + if (WSAStartup (MAKEWORD (2, 0), &wsaData)) + { + fprintf (stderr, "%s: error initializing WinSock2", progname); + exit (EXIT_FAILURE); + } + + atexit (close_winsock); +#endif /* WINDOWSNT */ +} + +/* + * Read the information needed to set up a TCP comm channel with + * the Emacs server: host, port and authentication string. +*/ +int get_server_config (server, authentication) + struct sockaddr_in *server; + char *authentication; +{ + FILE *config; + char dotted[32]; + char *port; + + if (! (config = fopen (server_file, "rb"))) + { + char *home = getenv ("HOME"); +#ifdef WINDOWSNT + if (! home) + home = getenv ("APPDATA"); +#endif + if (home) + { + char *path = alloca (32 + strlen (home) + strlen (server_file)); + sprintf (path, "%s/.emacs.d/server/%s", home, server_file); + config = fopen (path, "rb"); + } + } + + if (! config) + return FALSE; + + if (fgets (dotted, sizeof dotted, config) + && (port = strchr (dotted, ':'))) + { + *port++ = '\0'; + } + else + { + fprintf (stderr, "%s: invalid configuration info", progname); + exit (EXIT_FAILURE); + } + + server->sin_family = AF_INET; + server->sin_addr.s_addr = inet_addr (dotted); + server->sin_port = htons (atoi (port)); + + if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) + { + fprintf (stderr, "%s: cannot read authentication info", progname); + exit (EXIT_FAILURE); + } + + fclose (config); + + return TRUE; +} + +HSOCKET +set_tcp_socket () +{ + HSOCKET s; + struct sockaddr_in server; + IOCTL_BOOL_ARG c_arg = 0; + struct linger l_arg = {1, 1}; + char auth_string[AUTH_KEY_LENGTH + 1]; + + INITIALIZE (); + + if (! get_server_config (&server, auth_string)) + return INVALID_SOCKET; + + /* + * Open up an AF_INET socket + */ + if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) + { + fprintf (stderr, "%s: ", progname); + perror ("socket"); + return INVALID_SOCKET; + } + + /* + * Set up the socket + */ + if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) + { + fprintf (stderr, "%s: ", progname); + perror ("connect"); + return INVALID_SOCKET; + } + + IOCTL (s, FIONBIO, &c_arg); + setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); + + /* + * Send the authentication + */ + auth_string[AUTH_KEY_LENGTH] = '\0'; + + SEND_STRING ("-auth "); + SEND_STRING (auth_string); + SEND_STRING ("\n"); + + return s; +} + +#if !defined (NO_SOCKETS_IN_FILE_SYSTEM) + +/* Three possibilities: + 2 - can't be `stat'ed (sets errno) + 1 - isn't owned by us + 0 - success: none of the above */ + +static int +socket_status (socket_name) + char *socket_name; +{ + struct stat statbfr; + + if (stat (socket_name, &statbfr) == -1) + return 2; + + if (statbfr.st_uid != geteuid ()) + return 1; + + return 0; +} + +HSOCKET +set_local_socket () +{ + HSOCKET s; + struct sockaddr_un server; + + /* + * Open up an AF_UNIX socket in this person's home directory + */ + + if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) + { + fprintf (stderr, "%s: ", progname); + perror ("socket"); + return INVALID_SOCKET; + } + + server.sun_family = AF_UNIX; + + { + int sock_status = 0; + int default_sock = !socket_name; + int saved_errno; + char *server_name = "server"; + + if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) + { /* socket_name is a file name component. */ + server_name = socket_name; + socket_name = NULL; + default_sock = 1; /* Try both UIDs. */ + } + + if (default_sock) + { + socket_name = alloca (100 + strlen (server_name)); + sprintf (socket_name, "/tmp/emacs%d/%s", + (int) geteuid (), server_name); + } + + if (strlen (socket_name) < sizeof (server.sun_path)) + strcpy (server.sun_path, socket_name); + else + { + fprintf (stderr, "%s: socket-name %s too long", + progname, socket_name); + exit (EXIT_FAILURE); + } + + /* See if the socket exists, and if it's owned by us. */ + sock_status = socket_status (server.sun_path); + saved_errno = errno; + if (sock_status && default_sock) + { + /* Failing that, see if LOGNAME or USER exist and differ from + our euid. If so, look for a socket based on the UID + associated with the name. This is reminiscent of the logic + that init_editfns uses to set the global Vuser_full_name. */ + + char *user_name = (char *) getenv ("LOGNAME"); + + if (!user_name) + user_name = (char *) getenv ("USER"); + + if (user_name) + { + struct passwd *pw = getpwnam (user_name); + + if (pw && (pw->pw_uid != geteuid ())) + { + /* We're running under su, apparently. */ + socket_name = alloca (100 + strlen (server_name)); + sprintf (socket_name, "/tmp/emacs%d/%s", + (int) pw->pw_uid, server_name); + + if (strlen (socket_name) < sizeof (server.sun_path)) + strcpy (server.sun_path, socket_name); + else + { + fprintf (stderr, "%s: socket-name %s too long", + progname, socket_name); + exit (EXIT_FAILURE); + } + + sock_status = socket_status (server.sun_path); + saved_errno = errno; + } + else + errno = saved_errno; + } + } + + switch (sock_status) + { + case 1: + /* There's a socket, but it isn't owned by us. This is OK if + we are root. */ + if (0 != geteuid ()) + { + fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); + return INVALID_SOCKET; + } + break; + + case 2: + /* `stat' failed */ + if (saved_errno == ENOENT) + fprintf (stderr, + "%s: can't find socket; have you started the server?\n\ +To start the server in Emacs, type \"M-x server-start\".\n", + progname); + else + fprintf (stderr, "%s: can't stat %s: %s\n", + progname, server.sun_path, strerror (saved_errno)); + return INVALID_SOCKET; + } + } + + if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) + < 0) + { + fprintf (stderr, "%s: ", progname); + perror ("connect"); + return INVALID_SOCKET; + } + + return s; +} +#endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ + +HSOCKET +set_socket () +{ + if (server_file) + return set_tcp_socket (); + else +#ifndef NO_SOCKETS_IN_FILE_SYSTEM + return set_local_socket (); +#else + { + server_file = "server"; + return set_tcp_socket (); + } +#endif +} + +int +main (argc, argv) + int argc; + char **argv; +{ + HSOCKET s; + int i, rl, needlf = 0; + char *cwd; + char string[BUFSIZ+1]; + + progname = argv[0]; + + /* Process options. */ + decode_options (argc, argv); + + if ((argc - optind < 1) && !eval) + { + fprintf (stderr, "%s: file name or argument required\n", progname); + fprintf (stderr, "Try `%s --help' for more information\n", progname); + exit (EXIT_FAILURE); + } + + if ((s = set_socket ()) == INVALID_SOCKET) + fail (argc, argv); + +#ifdef HAVE_GETCWD + cwd = getcwd (string, sizeof string); +#else + cwd = getwd (string); +#endif + if (cwd == 0) + { + /* getwd puts message in STRING if it fails. */ +#ifdef HAVE_GETCWD + fprintf (stderr, "%s: %s (%s)\n", progname, + "Cannot get current working directory", strerror (errno)); +#else + fprintf (stderr, "%s: %s (%s)\n", progname, string, strerror (errno)); +#endif + fail (argc, argv); + } + + if (nowait) + SEND_STRING ("-nowait "); + + if (eval) + SEND_STRING ("-eval "); + + if (display) + { + SEND_STRING ("-display "); + SEND_QUOTED (display); + SEND_STRING (" "); + } + + if ((argc - optind > 0)) + { + for (i = optind; i < argc; i++) + { + if (eval) + ; /* Don't prepend any cwd or anything like that. */ + else if (*argv[i] == '+') + { + char *p = argv[i] + 1; + while (isdigit ((unsigned char) *p) || *p == ':') p++; + if (*p != 0) + { + SEND_QUOTED (cwd); + SEND_STRING ("/"); + } + } +#ifndef WINDOWSNT + else if (*argv[i] != '/') +#else + else if ((*argv[i] != '/') + /* Absolute paths can also start with backslash + or drive letters. */ + && (*argv[i] != '\\') + && (!islower (tolower (*argv[i])) + || (argv[i][1] != ':'))) +#endif + { + SEND_QUOTED (cwd); + SEND_STRING ("/"); + } + + SEND_QUOTED (argv[i]); + SEND_STRING (" "); + } + } + else + { + while (fgets (string, BUFSIZ, stdin)) + { + SEND_QUOTED (string); + } + SEND_STRING (" "); + } + + SEND_STRING ("\n"); + + /* Maybe wait for an answer. */ + if (!nowait) + { + if (!eval) + { + printf ("Waiting for Emacs..."); + needlf = 2; + } + fflush (stdout); + + /* Now, wait for an answer and print any messages. */ + while ((rl = recv (s, string, BUFSIZ, 0)) > 0) + { + string[rl] = '\0'; + if (needlf == 2) + printf ("\n"); + printf ("%s", string); + needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; + } + + if (needlf) + printf ("\n"); + fflush (stdout); + } + + CLOSE_SOCKET (s); + return EXIT_SUCCESS; +} + +#endif /* HAVE_SOCKETS */ + +#ifndef HAVE_STRERROR +char * +strerror (errnum) + int errnum; +{ + extern char *sys_errlist[]; + extern int sys_nerr; + + if (errnum >= 0 && errnum < sys_nerr) + return sys_errlist[errnum]; + return (char *) "Unknown error"; +} + +#endif /* ! HAVE_STRERROR */ + +/* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 + (do not change this comment) */ + +/* emacsclient.c ends here */