mirror of
https://git.savannah.gnu.org/git/emacs.git
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328 lines
7.1 KiB
C
328 lines
7.1 KiB
C
/* Client process that communicates with GNU Emacs acting as server.
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Copyright (C) 1986, 1987, 1994 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define NO_SHORTNAMES
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#include <../src/config.h>
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#undef read
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#undef write
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#undef open
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#undef close
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#undef signal
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#if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC)
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#include <stdio.h>
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main (argc, argv)
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int argc;
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char **argv;
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{
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fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n",
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argv[0]);
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fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n");
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exit (1);
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}
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#else /* HAVE_SOCKETS or HAVE_SYSVIPC */
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#if ! defined (HAVE_SYSVIPC)
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/* BSD code is very different from SYSV IPC code */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <errno.h>
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extern char *strerror ();
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extern int errno;
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main (argc, argv)
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int argc;
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char **argv;
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{
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char system_name[32];
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int s, i;
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FILE *out;
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struct sockaddr_un server;
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char *homedir, *cwd, *str;
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char string[BUFSIZ];
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char *getenv (), *getwd ();
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int geteuid ();
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if (argc < 2)
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{
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fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
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exit (1);
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}
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/*
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* Open up an AF_UNIX socket in this person's home directory
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*/
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if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
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{
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fprintf (stderr, "%s: ", argv[0]);
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perror ("socket");
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exit (1);
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}
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server.sun_family = AF_UNIX;
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#ifndef SERVER_HOME_DIR
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{
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struct stat statbfr;
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gethostname (system_name, sizeof (system_name));
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sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name);
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if (stat (server.sun_path, &statbfr) == -1)
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{
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if (errno == ENOENT)
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fprintf (stderr,
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"Can't find socket; have you started the server?\n");
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else
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perror ("stat");
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exit (1);
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}
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if (statbfr.st_uid != geteuid())
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{
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fprintf (stderr, "Illegal socket owner\n");
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exit (1);
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}
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}
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#else
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if ((homedir = getenv ("HOME")) == NULL)
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{
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fprintf (stderr, "%s: No home directory\n", argv[0]);
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exit (1);
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}
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strcpy (server.sun_path, homedir);
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strcat (server.sun_path, "/.emacs_server");
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#endif
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if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
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< 0)
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{
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fprintf (stderr, "%s: ", argv[0]);
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perror ("connect");
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exit (1);
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}
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if ((out = fdopen (s, "r+")) == NULL)
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{
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fprintf (stderr, "%s: ", argv[0]);
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perror ("fdopen");
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exit (1);
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}
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cwd = getwd (string);
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if (cwd == 0)
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{
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/* getwd puts message in STRING if it fails. */
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fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
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exit (1);
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}
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for (i = 1; i < argc; i++)
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{
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if (*argv[i] == '+')
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{
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char *p = argv[i] + 1;
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while (*p >= '0' && *p <= '9') p++;
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if (*p != 0)
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fprintf (out, "%s/", cwd);
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}
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else if (*argv[i] != '/')
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fprintf (out, "%s/", cwd);
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fprintf (out, "%s ", argv[i]);
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}
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fprintf (out, "\n");
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fflush (out);
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printf ("Waiting for Emacs...");
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fflush (stdout);
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rewind (out); /* re-read the output */
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str = fgets (string, BUFSIZ, out);
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/* Now, wait for an answer and print any messages. */
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while (str = fgets (string, BUFSIZ, out))
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printf ("%s", str);
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exit (0);
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}
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#else /* This is the SYSV IPC section */
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <stdio.h>
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char *getwd (), *getcwd (), *getenv ();
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main (argc, argv)
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int argc;
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char **argv;
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{
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int s;
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key_t key;
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/* Size of text allocated in MSGP. */
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int size_allocated = BUFSIZ;
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/* Amount of text used in MSGP. */
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int used;
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struct msgbuf *msgp
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= (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated);
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struct msqid_ds * msg_st;
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char *homedir, buf[BUFSIZ];
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char gwdirb[BUFSIZ];
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char *cwd;
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char *temp;
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if (argc < 2)
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{
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fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
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exit (1);
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}
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/*
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* Create a message queue using ~/.emacs_server as the path for ftok
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*/
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if ((homedir = getenv ("HOME")) == NULL)
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{
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fprintf (stderr, "%s: No home directory\n", argv[0]);
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exit (1);
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}
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strcpy (buf, homedir);
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strcat (buf, "/.emacs_server");
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creat (buf, 0600);
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key = ftok (buf, 1); /* unlikely to be anyone else using it */
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s = msgget (key, 0600 | IPC_CREAT);
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if (s == -1)
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{
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fprintf (stderr, "%s: ", argv[0]);
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perror ("msgget");
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exit (1);
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}
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/* Determine working dir, so we can prefix it to all the arguments. */
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#ifdef BSD
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temp = getwd (gwdirb);
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#else
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temp = getcwd (gwdirb, sizeof gwdirb);
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#endif
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cwd = gwdirb;
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if (temp != 0)
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{
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/* On some systems, cwd can look like `@machine/...';
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ignore everything before the first slash in such a case. */
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while (*cwd && *cwd != '/')
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cwd++;
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strcat (cwd, "/");
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}
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else
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{
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fprintf (stderr, cwd);
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exit (1);
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}
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msgp->mtext[0] = 0;
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used = 0;
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argc--; argv++;
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while (argc)
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{
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int need_cwd = 0;
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if (*argv[0] == '+')
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{
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char *p = argv[0] + 1;
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while (*p >= '0' && *p <= '9') p++;
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if (*p != 0)
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need_cwd = 1;
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}
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else if (*argv[0] != '/')
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need_cwd = 1;
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if (need_cwd)
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used += strlen (cwd);
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used += strlen (argv[0]) + 1;
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while (used + 2 > size_allocated)
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{
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size_allocated *= 2;
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msgp = (struct msgbuf *) realloc (msgp,
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(sizeof (struct msgbuf)
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+ size_allocated));
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}
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if (need_cwd)
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strcat (msgp->mtext, cwd);
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strcat (msgp->mtext, argv[0]);
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strcat (msgp->mtext, " ");
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argv++; argc--;
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}
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strcat (msgp->mtext, "\n");
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#ifdef HPUX /* HPUX has a bug. */
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if (strlen (msgp->mtext) >= 512)
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{
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fprintf (stderr, "emacsclient: args too long for msgsnd\n");
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exit (1);
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}
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#endif
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msgp->mtype = 1;
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if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
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{
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fprintf (stderr, "%s: ", argv[0]);
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perror ("msgsnd");
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exit (1);
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}
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/*
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* Now, wait for an answer
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*/
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printf ("Waiting for Emacs...");
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fflush (stdout);
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msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */
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strcpy (buf, msgp->mtext);
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printf ("\n%s\n", buf);
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exit (0);
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}
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#endif /* HAVE_SYSVIPC */
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#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
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#ifndef HAVE_STRERROR
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char *
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strerror (errnum)
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int errnum;
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{
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extern char *sys_errlist[];
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extern int sys_nerr;
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if (errnum >= 0 && errnum < sys_nerr)
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return sys_errlist[errnum];
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return (char *) "Unknown error";
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}
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#endif /* ! HAVE_STRERROR */
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