/* Communication subprocess for GNU Emacs acting as server.
- Copyright (C) 1986, 1987, 1992, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1992, 1994, 1999 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#define NO_SHORTNAMES
#include <../src/config.h>
-#undef read
-#undef write
-#undef open
-#undef close
+#include <signal.h>
#undef signal
#if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC)
#include <stdio.h>
+int
main ()
{
fprintf (stderr, "Sorry, the Emacs server is supported only on systems\n");
#else /* HAVE_SOCKETS or HAVE_SYSVIPC */
+void perror_1 ();
+void fatal_error ();
+
#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/file.h>
#include <sys/socket.h>
-#include <sys/signal.h>
#include <sys/un.h>
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifndef errno
extern int errno;
+#endif
/* Copied from src/process.c */
#ifdef FD_SET
#define FD_ZERO(p) (*(p) = 0)
#endif /* no FD_SET */
+/* This is the file name of the socket that we made. */
+
+char *socket_name;
+
+/* Name of this program. */
+
+char *progname;
+\f
+/* Handle fatal signals. */
+
+/* This is the handler. */
+
+SIGTYPE
+delete_socket (sig)
+ int sig;
+{
+ signal (sig, SIG_DFL);
+ unlink (socket_name);
+ kill (getpid (), sig);
+}
+
+/* Set up to handle all the signals. */
+
+void
+handle_signals ()
+{
+ signal (SIGHUP, delete_socket);
+ signal (SIGINT, delete_socket);
+ signal (SIGQUIT, delete_socket);
+ signal (SIGILL, delete_socket);
+ signal (SIGTRAP, delete_socket);
+#ifdef SIGABRT
+ signal (SIGABRT, delete_socket);
+#endif
+#ifdef SIGHWE
+ signal (SIGHWE, delete_socket);
+#endif
+#ifdef SIGPRE
+ signal (SIGPRE, delete_socket);
+#endif
+#ifdef SIGORE
+ signal (SIGORE, delete_socket);
+#endif
+#ifdef SIGUME
+ signal (SIGUME, delete_socket);
+#endif
+#ifdef SIGDLK
+ signal (SIGDLK, delete_socket);
+#endif
+#ifdef SIGCPULIM
+ signal (SIGCPULIM, delete_socket);
+#endif
+#ifdef SIGIOT
+ /* This is missing on some systems - OS/2, for example. */
+ signal (SIGIOT, delete_socket);
+#endif
+#ifdef SIGEMT
+ signal (SIGEMT, delete_socket);
+#endif
+ signal (SIGFPE, delete_socket);
+#ifdef SIGBUS
+ signal (SIGBUS, delete_socket);
+#endif
+ signal (SIGSEGV, delete_socket);
+#ifdef SIGSYS
+ signal (SIGSYS, delete_socket);
+#endif
+ signal (SIGTERM, delete_socket);
+#ifdef SIGXCPU
+ signal (SIGXCPU, delete_socket);
+#endif
+#ifdef SIGXFSZ
+ signal (SIGXFSZ, delete_socket);
+#endif /* SIGXFSZ */
+
+#ifdef AIX
+/* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
+ signal (SIGXCPU, delete_socket);
+#ifndef _I386
+ signal (SIGIOINT, delete_socket);
+#endif
+ signal (SIGGRANT, delete_socket);
+ signal (SIGRETRACT, delete_socket);
+ signal (SIGSOUND, delete_socket);
+ signal (SIGMSG, delete_socket);
+#endif /* AIX */
+}
+\f
+/* Print error message. `s1' is printf control string, `s2' is arg for it. */
+void
+error (s1, s2)
+ char *s1, *s2;
+{
+ fprintf (stderr, "%s: ", progname);
+ fprintf (stderr, s1, s2);
+ fprintf (stderr, "\n");
+}
+
+/* Print error message and exit. */
+void
+fatal (s1, s2)
+ char *s1, *s2;
+{
+ error (s1, s2);
+ exit (1);
+}
+
+/* Like malloc but get fatal error if memory is exhausted. */
+
+long *
+xmalloc (size)
+ unsigned int size;
+{
+ long *result = (long *) malloc (size);
+ if (result == NULL)
+ fatal ("virtual memory exhausted", 0);
+ return result;
+}
+\f
int
-main ()
+main (argc, argv)
+ int argc;
+ char **argv;
{
- char system_name[32];
+ char *system_name;
+ int system_name_length;
int s, infd;
-#ifdef __GNU_LIBRARY__
- size_t fromlen;
+#ifdef SOCKLEN_TYPE
+ SOCKLEN_TYPE fromlen;
#else
- int fromlen;
+ size_t fromlen;
#endif
struct sockaddr_un server, fromunix;
char *homedir;
char *getenv ();
#endif
+ progname = argv[0];
+
openfiles_size = 20;
openfiles = (FILE **) malloc (openfiles_size * sizeof (FILE *));
if (openfiles == 0)
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
- gethostname (system_name, sizeof (system_name));
sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name);
if (unlink (server.sun_path) == -1 && errno != ENOENT)
strcpy (server.sun_path, homedir);
strcat (server.sun_path, "/.emacs-server-");
- gethostname (system_name, sizeof (system_name));
strcat (server.sun_path, system_name);
/* Delete anyone else's old server. */
unlink (server.sun_path);
#endif
+ /* Save the socket name so we can delete it. */
+ socket_name = (char *) xmalloc (strlen (server.sun_path) + 1);
+ strcpy (socket_name, server.sun_path);
+
+ handle_signals ();
+
if (bind (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) < 0)
{
perror_1 ("bind");
#else /* This is the SYSV IPC section */
#include <sys/types.h>
-#include <sys/signal.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <setjmp.h>
Its stderr always exists--rms. */
#include <stdio.h>
+int
main ()
{
int s, infd, fromlen, ioproc;
#endif /* HAVE_SYSVIPC */
-#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
\f
/* This is like perror but puts `Error: ' at the beginning. */
+void
perror_1 (string)
char *string;
{
perror (copy);
}
+void
fatal_error (string)
char *string;
{
fprintf (stderr, string);
exit (1);
}
+#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
HCoop / bpt / emacs.git / blobdiff