/* Client process that communicates with GNU Emacs acting as server.
- Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001
+ Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2003, 2004
Free Software Foundation, Inc.
This file is part of GNU Emacs.
#define NO_SHORTNAMES
-#include <../src/config.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
#undef signal
-#include <ctype.h>
+#include <ctype.h>
#include <stdio.h>
#include <getopt.h>
#ifdef HAVE_UNISTD_H
# include <pwd.h>
#endif /* not VMS */
+#include <signal.h>
+#include <errno.h>
+
+\f
char *getenv (), *getwd ();
char *getcwd ();
/* Name used to invoke this program. */
char *progname;
+/* The first argument to main. */
+int main_argc;
+
+/* The second argument to main. */
+char **main_argv;
+
/* Nonzero means don't wait for a response from Emacs. --no-wait. */
int nowait = 0;
+/* Nonzero means args are expressions to be evaluated. --eval. */
+int eval = 0;
+
+/* The display on which Emacs should work. --display. */
+char *display = NULL;
+
+/* Nonzero means open a new Emacs frame on the current terminal. */
+int frame = 0;
+
+/* If non-NULL, the name of an editor to fallback to if the server
+ is not running. --alternate-editor. */
+const char * alternate_editor = NULL;
+
+/* If non-NULL, the filename of the UNIX socket. */
+char *socket_name = NULL;
+
void print_help_and_exit ();
struct option longopts[] =
{
{ "no-wait", no_argument, NULL, 'n' },
+ { "eval", no_argument, NULL, 'e' },
{ "help", no_argument, NULL, 'H' },
{ "version", no_argument, NULL, 'V' },
- { "alternate-editor",required_argument, NULL, 'a' },
- { 0 }
+ { "tty", no_argument, NULL, 't' },
+ { "alternate-editor", required_argument, NULL, 'a' },
+ { "socket-name", required_argument, NULL, 's' },
+ { "display", required_argument, NULL, 'd' },
+ { 0, 0, 0, 0 }
};
-
-const char * alternate_editor = NULL;
-
/* Decode the options from argv and argc.
The global variable `optind' will say how many arguments we used up. */
while (1)
{
int opt = getopt_long (argc, argv,
- "VHna:", longopts, 0);
+ "VHnea:s:d:t", longopts, 0);
if (opt == EOF)
break;
alternate_editor = getenv ("ALTERNATE_EDITOR");
-
+
switch (opt)
{
case 0:
/* If getopt returns 0, then it has already processed a
long-named option. We should do nothing. */
break;
-
+
case 'a':
alternate_editor = optarg;
break;
-
+
+ case 's':
+ socket_name = optarg;
+ break;
+
+ case 'd':
+ display = optarg;
+ break;
+
case 'n':
nowait = 1;
break;
+ case 'e':
+ eval = 1;
+ break;
+
case 'V':
- fprintf (stderr, "emacsclient %s\n", VERSION);
- exit (1);
+ printf ("emacsclient %s\n", VERSION);
+ exit (0);
break;
+ case 't':
+ frame = 1;
+ break;
+
case 'H':
- default:
print_help_and_exit ();
+ break;
+
+ default:
+ fprintf (stderr, "Try `%s --help' for more information\n", progname);
+ exit (1);
+ break;
}
}
+
+ if (frame) {
+ nowait = 0;
+ display = 0;
+ }
+
}
void
print_help_and_exit ()
{
- fprintf (stderr,
- "Usage: %s [-a ALTERNATE-EDITOR] [-n] [--no-wait] [+LINE[:COLUMN]] FILENAME\n",
- progname);
- fprintf (stderr,
- "Or %s --version\n",
- progname);
- fprintf (stderr,
- "Report bugs to bug-gnu-emacs@gnu.org.\n");
- exit (1);
+ printf (
+ "Usage: %s [OPTIONS] FILE...\n\
+Tell the Emacs server to visit the specified files.\n\
+Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\
+\n\
+The following OPTIONS are accepted:\n\
+-V, --version Just print a version info and return\n\
+-H, --help Print this usage information message\n\
+-t, --tty Open a new Emacs frame on the current terminal\n\
+-n, --no-wait Don't wait for the server to return\n\
+-e, --eval Evaluate the FILE arguments as ELisp expressions\n\
+-d, --display=DISPLAY Visit the file in the given display\n\
+-s, --socket-name=FILENAME\n\
+ Set the filename of the UNIX socket for communication\n\
+-a, --alternate-editor=EDITOR\n\
+ Editor to fallback to if the server is not running\n\
+\n\
+Report bugs to bug-gnu-emacs@gnu.org.\n", progname);
+ exit (0);
}
-/* Return a copy of NAME, inserting a &
- before each &, each space, and any initial -.
- Change spaces to underscores, too, so that the
+/* In NAME, insert a & before each &, each space, each newline, and
+ any initial -. Change spaces to underscores, too, so that the
return value never contains a space. */
-char *
-quote_file_name (name)
+void
+quote_file_name (name, stream)
char *name;
+ FILE *stream;
{
char *copy = (char *) malloc (strlen (name) * 2 + 1);
char *p, *q;
*q++ = '_';
p++;
}
+ else if (*p == '\n')
+ {
+ *q++ = '&';
+ *q++ = 'n';
+ p++;
+ }
else
{
if (*p == '&' || (*p == '-' && p == name))
}
*q++ = 0;
-
- return copy;
+ fprintf (stream, copy);
+
+ free (copy);
}
/* Like malloc but get fatal error if memory is exhausted. */
defined-- exit with an errorcode.
*/
void
-fail (argc, argv)
- int argc;
- char **argv;
+fail (void)
{
if (alternate_editor)
{
- int i = optind -1 ;
- execvp (alternate_editor, argv + i);
+ int i = optind - 1;
+ execvp (alternate_editor, main_argv + i);
return;
}
else
}
}
+int emacs_pid;
+
+#ifdef nec_ews_svr4
+extern char *_sobuf ;
+#else
+#if defined (USG) || defined (DGUX)
+unsigned char _sobuf[BUFSIZ+8];
+#else
+char _sobuf[BUFSIZ];
+#endif
+#endif
+
+/* A signal handler that passes the signal to the Emacs process.
+ Useful for SIGWINCH. */
+
+SIGTYPE
+pass_signal_to_emacs (int signalnum)
+{
+ int old_errno = errno;
+
+ if (emacs_pid)
+ kill (emacs_pid, signalnum);
+
+ signal (signalnum, pass_signal_to_emacs);
+ errno = old_errno;
+}
+
+/* Set up signal handlers before opening a frame on the current tty. */
+
+void
+init_signals (void)
+{
+ /* Set up signal handlers. */
+ signal (SIGWINCH, pass_signal_to_emacs);
+
+ /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of
+ deciding which terminal the signal came from. C-g is now a
+ normal input event on secondary terminals. */
+#if 0
+ signal (SIGINT, pass_signal_to_emacs);
+ signal (SIGQUIT, pass_signal_to_emacs);
+#endif
+}
-
\f
-#if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC)
+#if !defined (HAVE_SOCKETS) || defined (NO_SOCKETS_IN_FILE_SYSTEM)
int
main (argc, 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");
+ fprintf (stderr, "on systems with Berkeley sockets.\n");
- fail (argc, argv);
+ fail ();
}
-#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 */
+#else /* HAVE_SOCKETS */
#include <sys/types.h>
#include <sys/socket.h>
return 0;
}
+/* Returns 1 if PREFIX is a prefix of STRING. */
+static int
+strprefix (char *prefix, char *string)
+{
+ int i;
+ if (! prefix)
+ return 1;
+
+ if (!string)
+ return 0;
+
+ for (i = 0; prefix[i]; i++)
+ if (!string[i] || string[i] != prefix[i])
+ return 0;
+ return 1;
+}
+
int
main (argc, argv)
int argc;
{
char *system_name;
int system_name_length;
- int s, i;
+ int s, i, needlf = 0;
FILE *out, *in;
struct sockaddr_un server;
-#ifdef SERVER_HOME_DIR
- char *homedir;
-#endif
char *cwd, *str;
char string[BUFSIZ];
+ main_argc = argc;
+ main_argv = argv;
progname = argv[0];
/* Process options. */
decode_options (argc, argv);
- if (argc - optind < 1)
- print_help_and_exit ();
+ if ((argc - optind < 1) && !eval && !frame)
+ {
+ fprintf (stderr, "%s: file name or argument required\n", progname);
+ fprintf (stderr, "Try `%s --help' for more information\n", progname);
+ exit (1);
+ }
- /*
+ /*
* Open up an AF_UNIX socket in this person's home directory
*/
{
fprintf (stderr, "%s: ", argv[0]);
perror ("socket");
- fail (argc, argv);
+ fail ();
}
-
+
server.sun_family = AF_UNIX;
{
+ char *dot;
system_name_length = 32;
while (1)
free (system_name);
system_name_length *= 2;
}
+
+ /* We always use the non-dotted host name, for simplicity. */
+ dot = index (system_name, '.');
+ if (dot)
+ *dot = '\0';
}
-#ifndef SERVER_HOME_DIR
{
int sock_status = 0;
+ int default_sock = !socket_name;
+ int saved_errno = 0;
+
+ if (default_sock)
+ {
+ socket_name = alloca (system_name_length + 100);
+ sprintf (socket_name, "/tmp/emacs%d-%s/server",
+ (int) geteuid (), system_name);
+ }
- sprintf (server.sun_path, "/tmp/esrv%d-%s", (int) geteuid (), system_name);
+ if (strlen (socket_name) < sizeof (server.sun_path))
+ strcpy (server.sun_path, socket_name);
+ else
+ {
+ fprintf (stderr, "%s: socket-name %s too long",
+ argv[0], socket_name);
+ fail ();
+ }
/* See if the socket exists, and if it's owned by us. */
sock_status = socket_status (server.sun_path);
- if (sock_status)
+ saved_errno = errno;
+ if (sock_status && default_sock)
{
/* Failing that, see if LOGNAME or USER exist and differ from
our euid. If so, look for a socket based on the UID
associated with the name. This is reminiscent of the logic
that init_editfns uses to set the global Vuser_full_name. */
-
+
char *user_name = (char *) getenv ("LOGNAME");
if (!user_name)
user_name = (char *) getenv ("USER");
-
+
if (user_name)
{
struct passwd *pw = getpwnam (user_name);
if (pw && (pw->pw_uid != geteuid ()))
{
/* We're running under su, apparently. */
- sprintf (server.sun_path, "/tmp/esrv%d-%s",
+ sprintf (socket_name, "/tmp/emacs%d-%s/server",
(int) pw->pw_uid, system_name);
+
+ if (strlen (socket_name) < sizeof (server.sun_path))
+ strcpy (server.sun_path, socket_name);
+ else
+ {
+ fprintf (stderr, "%s: socket-name %s too long",
+ argv[0], socket_name);
+ exit (1);
+ }
+
sock_status = socket_status (server.sun_path);
+ saved_errno = errno;
}
}
}
-
+
switch (sock_status)
{
case 1:
if (0 != geteuid ())
{
fprintf (stderr, "%s: Invalid socket owner\n", argv[0]);
- fail (argc, argv);
+ fail ();
}
break;
-
+
case 2:
/* `stat' failed */
- if (errno == ENOENT)
+ if (saved_errno == ENOENT)
fprintf (stderr,
- "%s: can't find socket; have you started the server?\n",
+ "%s: Can't find socket; have you started the server?\n\
+To start the server in Emacs, type \"M-x server-start\".\n",
argv[0]);
else
- fprintf (stderr, "%s: can't stat %s: %s\n",
- argv[0], server.sun_path, strerror (errno));
- fail (argc, argv);
+ fprintf (stderr, "%s: Can't stat %s: %s\n",
+ argv[0], server.sun_path, strerror (saved_errno));
+ fail ();
break;
}
}
-#else
- if ((homedir = getenv ("HOME")) == NULL)
- {
- fprintf (stderr, "%s: No home directory\n", argv[0]);
- fail (argc, argv);
- }
- strcpy (server.sun_path, homedir);
- strcat (server.sun_path, "/.emacs-server-");
- 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");
- fail (argc, argv);
+ fail ();
}
/* We use the stream OUT to send our command to the server. */
{
fprintf (stderr, "%s: ", argv[0]);
perror ("fdopen");
- fail (argc, argv);
+ fail ();
}
/* We use the stream IN to read the response.
{
fprintf (stderr, "%s: ", argv[0]);
perror ("fdopen");
- fail (argc, argv);
+ fail ();
}
-#ifdef BSD_SYSTEM
- cwd = getwd (string);
-#else
+#ifdef HAVE_GETCWD
cwd = getcwd (string, sizeof string);
+#else
+ cwd = getwd (string);
#endif
if (cwd == 0)
{
/* getwd puts message in STRING if it fails. */
+
+#ifdef HAVE_GETCWD
fprintf (stderr, "%s: %s (%s)\n", argv[0],
-#ifdef BSD_SYSTEM
- string,
+ "Cannot get current working directory", strerror (errno));
#else
- "Cannot get current working directory",
+ fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
#endif
- strerror (errno));
- fail (argc, argv);
+ fail ();
}
if (nowait)
fprintf (out, "-nowait ");
- for (i = optind; i < argc; i++)
- {
- if (*argv[i] == '+')
- {
- char *p = argv[i] + 1;
- while (isdigit ((unsigned char) *p) || *p == ':') p++;
- if (*p != 0)
- fprintf (out, "%s/", quote_file_name (cwd));
- }
- else if (*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);
-
- /* 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, in))
- 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>
-#include <errno.h>
-extern int errno;
-
-char *getwd (), *getcwd (), *getenv ();
-struct utsname system_name;
+ if (eval)
+ fprintf (out, "-eval ");
-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;
-
- 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
- */
- if ((homedir = getenv ("HOME")) == NULL)
+ if (display)
{
- fprintf (stderr, "%s: No home directory\n", argv[0]);
- exit (1);
+ fprintf (out, "-display ");
+ quote_file_name (display, out);
+ fprintf (out, " ");
}
- 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)
+
+ if (frame)
{
- fprintf (stderr, "%s: ", argv[0]);
- perror ("msgget");
- exit (1);
+ char *tty_name = ttyname (fileno (stdin));
+ if (! tty_name)
+ fail ();
+
+ init_signals ();
+
+ fprintf (out, "-tty ");
+ quote_file_name (tty_name, out);
+ fprintf (out, " ");
+ quote_file_name (getenv("TERM"), out);
+ fprintf (out, " ");
}
-
- /* Determine working dir, so we can prefix it to all the arguments. */
-#ifdef BSD_SYSTEM
- temp = getwd (gwdirb);
-#else
- temp = getcwd (gwdirb, sizeof gwdirb);
-#endif
-
- cwd = gwdirb;
- if (temp != 0)
+
+ if ((argc - optind > 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, "/");
+ for (i = optind; i < argc; i++)
+ {
+ if (eval)
+ ; /* Don't prepend any cwd or anything like that. */
+ else if (*argv[i] == '+')
+ {
+ char *p = argv[i] + 1;
+ while (isdigit ((unsigned char) *p) || *p == ':') p++;
+ if (*p != 0)
+ {
+ quote_file_name (cwd, out);
+ fprintf (out, "/");
+ }
+ }
+ else if (*argv[i] != '/')
+ {
+ quote_file_name (cwd, out);
+ fprintf (out, "/");
+ }
+
+ quote_file_name (argv[i], out);
+ fprintf (out, " ");
+ }
}
else
{
-#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
- fail (argc, argv);
+ if (!frame)
+ {
+ while ((str = fgets (string, BUFSIZ, stdin)))
+ {
+ quote_file_name (str, out);
+ }
+ fprintf (out, " ");
+ }
}
+
+ fprintf (out, "\n");
+ fflush (out);
- msgp->mtext[0] = 0;
- used = 0;
-
+ /* Maybe wait for an answer. */
if (nowait)
{
- strcat (msgp->mtext, "-nowait ");
- used += 8;
+ return 0;
}
- argc -= optind;
- argv += optind;
-
- while (argc)
- {
- int need_cwd = 0;
- char *modified_arg = argv[0];
-
- if (*modified_arg == '+')
- {
- char *p = modified_arg + 1;
- while (isdigit (*p) || *p == ':')
- p++;
- if (*p != 0)
- 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));
- }
-
- 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)
+ if (!eval && !frame)
{
- fprintf (stderr, "%s: args too long for msgsnd\n", progname);
- fail (argc, argv);
+ printf ("Waiting for Emacs...");
+ needlf = 2;
}
-#endif
- msgp->mtype = 1;
- if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
+ fflush (stdout);
+
+ /* Now, wait for an answer and print any messages. */
+ while ((str = fgets (string, BUFSIZ, in)))
{
- fprintf (stderr, "%s: ", progname);
- perror ("msgsnd");
- fail (argc, argv);
+ if (frame)
+ {
+ if (strprefix ("emacs-pid ", str))
+ {
+ emacs_pid = strtol (string + strlen ("emacs-pid"), NULL, 10);
+ }
+ }
+ else
+ {
+ if (needlf == 2)
+ printf ("\n");
+ printf ("%s", str);
+ needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n';
+ }
}
- /* Maybe wait for an answer. */
- if (nowait)
- return 0;
-
- printf ("Waiting for Emacs...");
+ if (needlf)
+ printf ("\n");
fflush (stdout);
- msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */
- strcpy (buf, msgp->mtext);
-
- printf ("\n");
- if (*buf)
- printf ("%s\n", buf);
- exit (0);
+ return 0;
}
-#endif /* HAVE_SYSVIPC */
-
-#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
+#endif /* HAVE_SOCKETS */
\f
#ifndef HAVE_STRERROR
char *
}
#endif /* ! HAVE_STRERROR */
+
+/* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7
+ (do not change this comment) */
HCoop / bpt / emacs.git / blobdiff