X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/3cf8c6aa0170bc33d95e6ae67f9155b04a7dd285..463f55eece32211d04d8c3f50179b767753a4649:/lib-src/emacsclient.c diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c index d63ab3c5d1..180a79768d 100644 --- a/lib-src/emacsclient.c +++ b/lib-src/emacsclient.c @@ -1,5 +1,5 @@ /* Client process that communicates with GNU Emacs acting as server. - Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001 + Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -57,20 +57,29 @@ 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; + void print_help_and_exit (); 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' }, - { 0 } + { "display", required_argument, NULL, 'd' }, + { 0, 0, 0, 0 } }; - -const char * alternate_editor = NULL; - /* Decode the options from argv and argc. The global variable `optind' will say how many arguments we used up. */ @@ -82,7 +91,7 @@ decode_options (argc, argv) while (1) { int opt = getopt_long (argc, argv, - "VHna:", longopts, 0); + "VHnea:d:", longopts, 0); if (opt == EOF) break; @@ -100,18 +109,31 @@ decode_options (argc, argv) alternate_editor = optarg; break; + case 'd': + display = optarg; + break; + case 'n': nowait = 1; break; + case 'e': + eval = 1; + break; + case 'V': - fprintf (stderr, "emacsclient %s\n", VERSION); - exit (1); + printf ("emacsclient %s\n", VERSION); + exit (0); break; case 'H': - default: print_help_and_exit (); + break; + + default: + fprintf (stderr, "Try `%s --help' for more information\n", progname); + exit (1); + break; } } } @@ -119,15 +141,22 @@ decode_options (argc, argv) void print_help_and_exit () { - fprintf (stderr, - "Usage: %s [-a ALTERNATE-EDITOR] [-n] [--no-wait] [+LINE[:COLUMN]] FILENAME\n", - progname); - fprintf (stderr, - "Or %s --version\n", - progname); - fprintf (stderr, - "Report bugs to bug-gnu-emacs@gnu.org.\n"); - exit (1); + 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\ +-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 (0); } /* Return a copy of NAME, inserting a & @@ -208,7 +237,7 @@ fail (argc, argv) -#if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) +#if !defined (HAVE_SOCKETS) || defined (NO_SOCKETS_IN_FILE_SYSTEM) int main (argc, argv) @@ -217,15 +246,12 @@ main (argc, 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"); + fprintf (stderr, "on systems with Berkeley sockets.\n"); fail (argc, argv); } -#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 */ +#else /* HAVE_SOCKETS */ #include #include @@ -266,9 +292,6 @@ main (argc, argv) int s, i, needlf = 0; FILE *out, *in; struct sockaddr_un server; -#ifdef SERVER_HOME_DIR - char *homedir; -#endif char *cwd, *str; char string[BUFSIZ]; @@ -278,7 +301,11 @@ main (argc, argv) decode_options (argc, argv); if (argc - optind < 1) - print_help_and_exit (); + { + fprintf (stderr, "%s: file name or argument required\n", progname); + fprintf (stderr, "Try `%s --help' for more information\n", progname); + exit (1); + } /* * Open up an AF_UNIX socket in this person's home directory @@ -294,6 +321,7 @@ main (argc, argv) server.sun_family = AF_UNIX; { + char *dot; system_name_length = 32; while (1) @@ -309,13 +337,17 @@ main (argc, argv) free (system_name); system_name_length *= 2; } + + /* We always use the non-dotted host name, for simplicity. */ + dot = index (system_name, '.'); + if (dot) + *dot = '\0'; } -#ifndef SERVER_HOME_DIR { int sock_status = 0; - sprintf (server.sun_path, "/tmp/esrv%d-%s", (int) geteuid (), system_name); + sprintf (server.sun_path, "/tmp/emacs%d-%s/server", (int) geteuid (), system_name); /* See if the socket exists, and if it's owned by us. */ sock_status = socket_status (server.sun_path); @@ -359,7 +391,8 @@ main (argc, argv) /* `stat' failed */ if (errno == ENOENT) fprintf (stderr, - "%s: can't find socket; have you started the server?\n", + "%s: can't find socket; have you started the server?\n\ +To start the server in Emacs, type \"M-x server-start\".\n", argv[0]); else fprintf (stderr, "%s: can't stat %s: %s\n", @@ -368,16 +401,6 @@ main (argc, argv) break; } } -#else - if ((homedir = getenv ("HOME")) == NULL) - { - fprintf (stderr, "%s: No home directory\n", argv[0]); - fail (argc, argv); - } - strcpy (server.sun_path, homedir); - strcat (server.sun_path, "/.emacs-server-"); - strcat (server.sun_path, system_name); -#endif if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) < 0) @@ -407,19 +430,19 @@ main (argc, argv) fail (argc, argv); } -#ifdef BSD_SYSTEM - cwd = getwd (string); -#else +#ifdef HAVE_GETCWD cwd = getcwd (string, sizeof string); +#else + cwd = getwd (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 +#ifdef HAVE_GETCWD "Cannot get current working directory", +#else + string, #endif strerror (errno)); fail (argc, argv); @@ -428,9 +451,17 @@ main (argc, argv) if (nowait) fprintf (out, "-nowait "); + if (eval) + fprintf (out, "-eval "); + + if (display) + fprintf (out, "-display %s ", quote_file_name (display)); + for (i = optind; i < argc; i++) { - if (*argv[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++; @@ -449,8 +480,11 @@ main (argc, argv) if (nowait) return 0; - printf ("Waiting for Emacs..."); - needlf = 2; + if (!eval) + { + printf ("Waiting for Emacs..."); + needlf = 2; + } fflush (stdout); /* Now, wait for an answer and print any messages. */ @@ -469,183 +503,7 @@ main (argc, argv) 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 - fail (argc, argv); - } - - 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 (isdigit (*p) || *p == ':') - p++; - if (*p != 0) - need_cwd = 1; - } - else if (*modified_arg != '/') - need_cwd = 1; - - modified_arg = quote_file_name (modified_arg); - - if (need_cwd) - /* Overestimate in case we have to quote something in CWD. */ - used += 2 * 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, quote_file_name (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); - fail (argc, argv); - } -#endif - msgp->mtype = 1; - if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) - { - fprintf (stderr, "%s: ", progname); - perror ("msgsnd"); - fail (argc, argv); - } - - /* 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 */ +#endif /* HAVE_SOCKETS */ #ifndef HAVE_STRERROR char *