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- /* 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #define NO_SHORTNAMES
- #include <../src/config.h>
- #undef read
- #undef write
- #undef open
- #undef close
- #undef signal
-
-
- #if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC)
- #include <stdio.h>
-
- 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_SYSVIPC)
- /* BSD code is very different from SYSV IPC code */
-
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/un.h>
- #include <sys/stat.h>
- #include <stdio.h>
- #include <errno.h>
-
- extern char *strerror ();
- extern int errno;
-
- main (argc, argv)
- int argc;
- char **argv;
- {
- char system_name[32];
- int s, i;
- FILE *out;
- struct sockaddr_un server;
- char *homedir, *cwd, *str;
- char string[BUFSIZ];
-
- char *getenv (), *getwd ();
- int geteuid ();
-
- if (argc < 2)
- {
- fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
- exit (1);
- }
-
- /*
- * 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;
-
- 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");
- else
- perror ("stat");
- exit (1);
- }
- if (statbfr.st_uid != geteuid())
- {
- fprintf (stderr, "Illegal socket owner\n");
- 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");
- #endif
-
- if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
- < 0)
- {
- fprintf (stderr, "%s: ", argv[0]);
- perror ("connect");
- exit (1);
- }
- if ((out = fdopen (s, "r+")) == NULL)
- {
- fprintf (stderr, "%s: ", argv[0]);
- perror ("fdopen");
- exit (1);
- }
-
- cwd = getwd (string);
- if (cwd == 0)
- {
- /* getwd puts message in STRING if it fails. */
- fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
- exit (1);
- }
-
- for (i = 1; 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 ", argv[i]);
- }
- fprintf (out, "\n");
- fflush (out);
-
- 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. */
-
- while (str = fgets (string, BUFSIZ, out))
- printf ("%s", str);
-
- exit (0);
- }
-
- #else /* This is the SYSV IPC section */
-
- #include <sys/types.h>
- #include <sys/ipc.h>
- #include <sys/msg.h>
- #include <stdio.h>
-
- char *getwd (), *getcwd (), *getenv ();
-
- 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;
- char *progname = argv[0];
-
- if (argc < 2)
- {
- fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
- exit (1);
- }
-
- /*
- * 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);
- strcat (buf, "/.emacs_server");
- 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
- 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
- {
- fprintf (stderr, cwd);
- exit (1);
- }
-
- msgp->mtext[0] = 0;
- used = 0;
- argc--; argv++;
- 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;
-
- 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, "emacsclient: args too long for msgsnd\n");
- exit (1);
- }
- #endif
- msgp->mtype = 1;
- if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
- {
- fprintf (stderr, "%s: ", progname);
- perror ("msgsnd");
- exit (1);
- }
- /*
- * Now, wait for an answer
- */
- 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);
- 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 */
-