X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/c0acc3e1cd36b203b6c1c37241fe634c5cfa3a54..041470d2d9125f8459708b39da8e29c4c51fb70e:/lib-src/emacsclient.c diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c index 5f1a41a502..11946ff2ec 100644 --- a/lib-src/emacsclient.c +++ b/lib-src/emacsclient.c @@ -1,11 +1,11 @@ /* Client process that communicates with GNU Emacs acting as server. - Copyright (C) 1986, 1987 Free Software Foundation, Inc. + Copyright (C) 1986, 1987, 1994, 1999 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 1, or (at your option) +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, @@ -15,21 +15,149 @@ 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ +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 -#ifdef close -#undef close +#include <../src/config.h> +#undef signal + +#include +#include +#ifdef HAVE_UNISTD_H +#include #endif +char *getenv (), *getwd (); +char *getcwd (); -#if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC) -#include +/* 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, "emacsclient %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, + "Or %s --version\n", + progname); + fprintf (stderr, + "Report bugs to bug-gnu-emacs@gnu.org.\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; +{ + long *result = (long *) malloc (size); + if (result == NULL) + { + perror ("malloc"); + exit (1); + } + return result; +} + +#if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) main (argc, argv) int argc; @@ -43,39 +171,38 @@ main (argc, argv) #else /* HAVE_SOCKETS or HAVE_SYSVIPC */ -#if ! defined (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 #include -extern int sys_nerr; -extern char *sys_errlist[]; +extern char *strerror (); extern int errno; +int main (argc, argv) int argc; char **argv; { - char system_name[32]; + char *system_name; + int system_name_length; int s, i; - FILE *out; + FILE *out, *in; struct sockaddr_un server; char *homedir, *cwd, *str; char string[BUFSIZ]; - char *getenv (), *getwd (); - int geteuid (); + progname = argv[0]; - if (argc < 2) - { - fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]); - exit (1); - } + /* 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 @@ -88,25 +215,45 @@ main (argc, argv) exit (1); } server.sun_family = AF_UNIX; + + { + 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; + } + } + #ifndef SERVER_HOME_DIR { struct stat statbfr; - gethostname (system_name, sizeof (system_name)); sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name); if (stat (server.sun_path, &statbfr) == -1) { if (errno == ENOENT) fprintf (stderr, - "Can't find socket; have you started the server?\n"); + "%s: can't find socket; have you started the server?\n", + argv[0]); else - perror ("stat"); + fprintf (stderr, "%s: can't stat %s: %s\n", + argv[0], server.sun_path, strerror (errno)); exit (1); } - if (statbfr.st_uid != geteuid()) + if (statbfr.st_uid != geteuid ()) { - fprintf (stderr, "Illegal socket owner\n"); + fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); exit (1); } } @@ -117,15 +264,19 @@ main (argc, argv) exit (1); } strcpy (server.sun_path, homedir); - strcat (server.sun_path, "/.emacs_server"); + strcat (server.sun_path, "/.emacs-server-"); + strcat (server.sun_path, system_name); #endif - if (connect (s, &server, strlen (server.sun_path) + 2) < 0) + 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]); @@ -133,43 +284,72 @@ main (argc, argv) 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], string, - (errno < sys_nerr) ? sys_errlist[errno] : "unknown error"); + fprintf (stderr, "%s: %s (%s)\n", argv[0], +#ifdef BSD_SYSTEM + string, +#else + "Cannot get current working directory", +#endif + strerror (errno)); exit (1); } - for (i = 1; i < argc; i++) + 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); + fprintf (out, "%s/", quote_file_name (cwd)); } else if (*argv[i] != '/') - fprintf (out, "%s/", cwd); - fprintf (out, "%s ", argv[i]); + fprintf (out, "%s/", quote_file_name (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); - rewind (out); /* re-read the output */ - str = fgets (string, BUFSIZ, out); - - /* Now, wait for an answer and print any messages. */ + /* 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, out)) + while (str = fgets (string, BUFSIZ, in)) printf ("%s", str); - - exit (0); + + return 0; } #else /* This is the SYSV IPC section */ @@ -177,7 +357,13 @@ main (argc, argv) #include #include #include +#include #include +#include +extern int errno; + +char *getwd (), *getcwd (), *getenv (); +struct utsname system_name; main (argc, argv) int argc; @@ -185,23 +371,28 @@ main (argc, argv) { int s; key_t key; - struct msgbuf * msgp = - (struct msgbuf *) malloc (sizeof *msgp + BUFSIZ); + /* 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; - char *getwd (), *getcwd (), *getenv (); - if (argc < 2) - { - fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]); - exit (1); - } + 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 + * Create a message queue using ~/.emacs-server as the path for ftok */ if ((homedir = getenv ("HOME")) == NULL) { @@ -209,10 +400,17 @@ main (argc, argv) exit (1); } strcpy (buf, homedir); - strcat (buf, "/.emacs_server"); +#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); + s = msgget (key, 0600 | IPC_CREAT); if (s == -1) { fprintf (stderr, "%s: ", argv[0]); @@ -221,7 +419,7 @@ main (argc, argv) } /* Determine working dir, so we can prefix it to all the arguments. */ -#ifdef BSD +#ifdef BSD_SYSTEM temp = getwd (gwdirb); #else temp = getcwd (gwdirb, sizeof gwdirb); @@ -238,49 +436,110 @@ main (argc, argv) } else { - fprintf (stderr, cwd); +#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; - argc--; argv++; + used = 0; + + if (nowait) + { + strcat (msgp->mtext, "-nowait "); + used += 8; + } + + argc -= optind; + argv += optind; + while (argc) { - if (*argv[0] == '+') + int need_cwd = 0; + char *modified_arg = argv[0]; + + if (*modified_arg == '+') { - char *p = argv[0] + 1; + char *p = modified_arg + 1; while (*p >= '0' && *p <= '9') p++; if (*p != 0) - strcat (msgp->mtext, cwd); + 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)); } - else if (*argv[0] != '/') - strcat (msgp->mtext, cwd); - strcat (msgp->mtext, argv[0]); + 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); + exit (1); + } +#endif msgp->mtype = 1; if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) { - fprintf (stderr, "%s: ", argv[0]); + fprintf (stderr, "%s: ", progname); perror ("msgsnd"); exit (1); } - /* - * Now, wait for an answer - */ + + /* 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%s\n", buf); + 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 */