mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-26 10:49:33 +00:00
349 lines
7.8 KiB
C
349 lines
7.8 KiB
C
/* 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_SOCKETS) && ! defined (NO_SOCKETS_IN_FILE_SYSTEM)
|
||
/* 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;
|
||
|
||
int
|
||
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 ();
|
||
char *getcwd ();
|
||
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,
|
||
"%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);
|
||
}
|
||
if ((out = fdopen (s, "r+")) == NULL)
|
||
{
|
||
fprintf (stderr, "%s: ", argv[0]);
|
||
perror ("fdopen");
|
||
exit (1);
|
||
}
|
||
|
||
#ifdef BSD
|
||
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, 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);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#else /* This is the SYSV IPC section */
|
||
|
||
#include <sys/types.h>
|
||
#include <sys/ipc.h>
|
||
#include <sys/msg.h>
|
||
#include <sys/utsname.h>
|
||
#include <stdio.h>
|
||
|
||
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;
|
||
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);
|
||
#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
|
||
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, "%s: %s\n", argv[0], 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, "%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);
|
||
}
|
||
/*
|
||
* 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 */
|