/* Client process that communicates with GNU Emacs acting as server.
- Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 1986-1987, 1994, 1999-2011 Free Software Foundation, Inc.
This file is part of GNU Emacs.
# define CLOSE_SOCKET closesocket
# define INITIALIZE() (initialize_sockets ())
+char *w32_getenv (char *);
+#define egetenv(VAR) w32_getenv(VAR)
+
#else /* !WINDOWSNT */
# include "syswait.h"
# define WCONTINUED 8
# endif
+#define egetenv(VAR) getenv(VAR)
+
#endif /* !WINDOWSNT */
#undef signal
#include <stdarg.h>
#include <ctype.h>
#include <stdio.h>
-#include "getopt.h"
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <getopt.h>
+#include <unistd.h>
#include <pwd.h>
#include <sys/stat.h>
char *(getcwd) (char *, size_t);
#endif
-#ifdef WINDOWSNT
-char *w32_getenv (char *);
-#define egetenv(VAR) w32_getenv(VAR)
-#else
-#define egetenv(VAR) getenv(VAR)
-#endif
-
#ifndef VERSION
#define VERSION "unspecified"
#endif
/* Additional space when allocating buffers for filenames, etc. */
#define EXTRA_SPACE 100
+/* Use this to suppress gcc's `...may be used before initialized' warnings. */
+#ifdef lint
+# define IF_LINT(Code) Code
+#else
+# define IF_LINT(Code) /* empty */
+#endif
+
\f
/* Name used to invoke this program. */
-char *progname;
+const char *progname;
/* 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 don't print messages for successful operations. --quiet. */
+int quiet = 0;
+
/* Nonzero means args are expressions to be evaluated. --eval. */
int eval = 0;
/* PID of the Emacs server process. */
int emacs_pid = 0;
-void print_help_and_exit (void) NO_RETURN;
-void fail (void) NO_RETURN;
+static void print_help_and_exit (void) NO_RETURN;
+static void fail (void) NO_RETURN;
struct option longopts[] =
{
{ "no-wait", no_argument, NULL, 'n' },
+ { "quiet", no_argument, NULL, 'q' },
{ "eval", no_argument, NULL, 'e' },
{ "help", no_argument, NULL, 'H' },
{ "version", no_argument, NULL, 'V' },
\f
/* Like malloc but get fatal error if memory is exhausted. */
-long *
+static long *
xmalloc (unsigned int size)
{
long *result = (long *) malloc (size);
return result;
}
-/* Like strdup but get a fatal error if memory is exhausted. */
-
-char *
-xstrdup (const char *s)
-{
- char *result = strdup (s);
- if (result == NULL)
- {
- perror ("strdup");
- exit (EXIT_FAILURE);
- }
- return result;
-}
-
/* From sysdep.c */
#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
#define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP)
#endif
#endif
-#ifndef IS_ANY_SEP
-#define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_))
-#endif
+char *get_current_dir_name (void);
/* Return the current working directory. Returns NULL on errors.
Any other returned value must be freed with free. This is used
get_current_dir_name (void)
{
char *buf;
- char *pwd;
+ const char *pwd;
struct stat dotstat, pwdstat;
/* If PWD is accurate, use it instead of calling getwd. PWD is
sometimes a nicer name, and using it may avoid a fatal error if a
#ifdef WINDOWSNT
+/* Like strdup but get a fatal error if memory is exhausted. */
+
+char *
+xstrdup (const char *s)
+{
+ char *result = strdup (s);
+ if (result == NULL)
+ {
+ perror ("strdup");
+ exit (EXIT_FAILURE);
+ }
+ return result;
+}
+
#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
/* Retrieve an environment variable from the Emacs subkeys of the registry.
/*
getenv wrapper for Windows
- This is needed to duplicate Emacs's behavior, which is to look for environment
- variables in the registry if they don't appear in the environment.
-*/
+ Value is allocated on the heap, and can be free'd.
+
+ This is needed to duplicate Emacs's behavior, which is to look for
+ environment variables in the registry if they don't appear in the
+ environment. */
char *
w32_getenv (char *envvar)
{
DWORD dwType;
if (value = getenv (envvar))
- /* Found in the environment. */
- return value;
+ /* Found in the environment. strdup it, because values returned
+ by getenv cannot be free'd. */
+ return xstrdup (value);
if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) &&
! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType)))
/* Display a normal or error message.
On Windows, use a message box if compiled as a Windows app. */
-void
-message (int is_error, const char *message, ...)
+static void message (int, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3);
+static void
+message (int is_error, const char *format, ...)
{
char msg[2048];
va_list args;
- va_start (args, message);
- vsprintf (msg, message, args);
+ va_start (args, format);
+ vsprintf (msg, format, args);
va_end (args);
#ifdef WINDOWSNT
/* Decode the options from argv and argc.
The global variable `optind' will say how many arguments we used up. */
-void
+static void
decode_options (int argc, char **argv)
{
alternate_editor = egetenv ("ALTERNATE_EDITOR");
{
int opt = getopt_long_only (argc, argv,
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
- "VHnea:s:f:d:tc",
+ "VHneqa:s:f:d:tc",
#else
- "VHnea:f:d:tc",
+ "VHneqa:f:d:tc",
#endif
longopts, 0);
eval = 1;
break;
+ case 'q':
+ quiet = 1;
+ break;
+
case 'V':
message (FALSE, "emacsclient %s\n", VERSION);
exit (EXIT_SUCCESS);
}
\f
-void
+static void
print_help_and_exit (void)
{
/* Spaces and tabs are significant in this message; they're chosen so the
use the current Emacs frame\n\
-e, --eval Evaluate the FILE arguments as ELisp expressions\n\
-n, --no-wait Don't wait for the server to return\n\
+-q, --quiet Don't display messages on success\n\
-d DISPLAY, --display=DISPLAY\n\
Visit the file in the given display\n\
--parent-id=ID Open in parent window ID, via XEmbed\n"
defined-- exit with an errorcode.
Uses argv, but gets it from the global variable main_argv.
*/
-void
+static void
fail (void)
{
if (alternate_editor)
/* On Windows, the socket library was historically separate from the standard
C library, so errors are handled differently. */
-void
+static void
sock_err_message (const char *function_name)
{
#ifdef WINDOWSNT
- the data ends in "\n", or
- the buffer is full (but this shouldn't happen)
Otherwise, we just accumulate it. */
-void
+static void
send_to_emacs (HSOCKET s, const char *data)
{
while (data)
{
- int dlen = strlen (data);
+ size_t dlen = strlen (data);
if (dlen + sblen >= SEND_BUFFER_SIZE)
{
int part = SEND_BUFFER_SIZE - sblen;
return value never contains a space.
Does not change the string. Outputs the result to S. */
-void
+static void
quote_argument (HSOCKET s, const char *str)
{
char *copy = (char *) xmalloc (strlen (str) * 2 + 1);
/* The inverse of quote_argument. Removes quoting in string STR by
modifying the string in place. Returns STR. */
-char *
+static char *
unquote_argument (char *str)
{
char *p, *q;
}
\f
-int
-file_name_absolute_p (const unsigned char *filename)
+static int
+file_name_absolute_p (const char *filename)
{
/* Sanity check, it shouldn't happen. */
if (! filename) return FALSE;
#ifdef WINDOWSNT
/* X:\xxx is always absolute. */
- if (isalpha (filename[0])
+ if (isalpha ((unsigned char) filename[0])
&& filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/'))
return TRUE;
\f
/*
* Read the information needed to set up a TCP comm channel with
- * the Emacs server: host, port, pid and authentication string.
+ * the Emacs server: host, port, and authentication string.
*/
-int
+static int
get_server_config (struct sockaddr_in *server, char *authentication)
{
char dotted[32];
char *port;
- char *pid;
FILE *config = NULL;
if (file_name_absolute_p (server_file))
config = fopen (server_file, "rb");
else
{
- char *home = egetenv ("HOME");
+ const char *home = egetenv ("HOME");
if (home)
{
return FALSE;
if (fgets (dotted, sizeof dotted, config)
- && (port = strchr (dotted, ':'))
- && (pid = strchr (port, ' ')))
- {
- *port++ = '\0';
- *pid++ = '\0';
- }
+ && (port = strchr (dotted, ':')))
+ *port++ = '\0';
else
{
message (TRUE, "%s: invalid configuration info\n", progname);
fclose (config);
- emacs_pid = atoi (pid);
-
return TRUE;
}
-HSOCKET
+static HSOCKET
set_tcp_socket (void)
{
HSOCKET s;
if (! get_server_config (&server, auth_string))
return INVALID_SOCKET;
- if (server.sin_addr.s_addr != inet_addr ("127.0.0.1"))
+ if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet)
message (FALSE, "%s: connected to remote socket at %s\n",
progname, inet_ntoa (server.sin_addr));
and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT
is zero, or return 0 if NOABORT is non-zero. */
-int
-find_tty (char **tty_type, char **tty_name, int noabort)
+static int
+find_tty (const char **tty_type, const char **tty_name, int noabort)
{
- char *type = egetenv ("TERM");
- char *name = ttyname (fileno (stdout));
+ const char *type = egetenv ("TERM");
+ const char *name = ttyname (fileno (stdout));
if (!name)
{
0 - success: none of the above */
static int
-socket_status (char *socket_name)
+socket_status (char *name)
{
struct stat statbfr;
- if (stat (socket_name, &statbfr) == -1)
+ if (stat (name, &statbfr) == -1)
return 2;
if (statbfr.st_uid != geteuid ())
/* A signal handler that passes the signal to the Emacs process.
Useful for SIGWINCH. */
-SIGTYPE
+static void
pass_signal_to_emacs (int signalnum)
{
int old_errno = errno;
/* Signal handler for SIGCONT; notify the Emacs process that it can
now resume our tty frame. */
-SIGTYPE
+static void
handle_sigcont (int signalnum)
{
int old_errno = errno;
reality, we may get a SIGTSTP on C-z. Handling this signal and
notifying Emacs about it should get things under control again. */
-SIGTYPE
+static void
handle_sigtstp (int signalnum)
{
int old_errno = errno;
/* Set up signal handlers before opening a frame on the current tty. */
-void
+static void
init_signals (void)
{
/* Set up signal handlers. */
}
-HSOCKET
+static HSOCKET
set_local_socket (void)
{
HSOCKET s;
int default_sock = !socket_name;
int saved_errno = 0;
const char *server_name = "server";
- const char *tmpdir;
+ const char *tmpdir IF_LINT ( = NULL);
if (socket_name && !strchr (socket_name, '/')
&& !strchr (socket_name, '\\'))
{
tmpdir = egetenv ("TMPDIR");
if (!tmpdir)
- tmpdir = "/tmp";
+ {
+#ifdef DARWIN_OS
+#ifndef _CS_DARWIN_USER_TEMP_DIR
+#define _CS_DARWIN_USER_TEMP_DIR 65537
+#endif
+ size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0);
+ if (n > 0)
+ {
+ tmpdir = alloca (n);
+ confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir, n);
+ }
+ else
+#endif
+ tmpdir = "/tmp";
+ }
socket_name = alloca (strlen (tmpdir) + strlen (server_name)
+ EXTRA_SPACE);
sprintf (socket_name, "%s/emacs%d/%s",
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 *) egetenv ("LOGNAME");
+ const char *user_name = egetenv ("LOGNAME");
if (!user_name)
- user_name = (char *) egetenv ("USER");
+ user_name = egetenv ("USER");
if (user_name)
{
}
#endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */
-HSOCKET
+static HSOCKET
set_socket (int no_exit_if_error)
{
HSOCKET s;
/* Start the emacs daemon and try to connect to it. */
-void
+static void
start_daemon_and_retry_set_socket (void)
{
#ifndef WINDOWSNT
else
{
char emacs[] = "emacs";
- char daemon[] = "--daemon";
- char *d_argv[] = {emacs, daemon, 0 };
+ char daemon_option[] = "--daemon";
+ char *d_argv[] = {emacs, daemon_option, 0 };
if (socket_name != NULL)
{
/* Pass --daemon=socket_name as argument. */
int
main (int argc, char **argv)
{
- int i, rl, needlf = 0;
+ int rl = 0, needlf = 0;
char *cwd, *str;
char string[BUFSIZ+1];
- int null_socket_name, null_server_file, start_daemon_if_needed;
+ int null_socket_name IF_LINT ( = 0);
+ int null_server_file IF_LINT ( = 0);
+ int start_daemon_if_needed;
+ int exit_status = EXIT_SUCCESS;
main_argv = argv;
progname = argv[0];
null_server_file = (server_file == NULL);
}
- if ((emacs_socket = set_socket (alternate_editor
- || start_daemon_if_needed)) == INVALID_SOCKET)
- if (start_daemon_if_needed)
- {
- /* Reset socket_name and server_file if they were NULL
- before the set_socket call. */
- if (null_socket_name)
- socket_name = NULL;
- if (null_server_file)
- server_file = NULL;
-
- start_daemon_and_retry_set_socket ();
- }
- else
- fail ();
+ emacs_socket = set_socket (alternate_editor || start_daemon_if_needed);
+ if (emacs_socket == INVALID_SOCKET)
+ {
+ if (! start_daemon_if_needed)
+ fail ();
+
+ /* Reset socket_name and server_file if they were NULL
+ before the set_socket call. */
+ if (null_socket_name)
+ socket_name = NULL;
+ if (null_server_file)
+ server_file = NULL;
+
+ start_daemon_and_retry_set_socket ();
+ }
cwd = get_current_dir_name ();
if (cwd == 0)
frame is available. */
if (tty || (current_frame && !eval))
{
- char *tty_type, *tty_name;
+ const char *tty_type, *tty_name;
if (find_tty (&tty_type, &tty_name, !tty))
{
if ((argc - optind > 0))
{
+ int i;
for (i = optind; i < argc; i++)
{
send_to_emacs (emacs_socket, "\n");
/* Wait for an answer. */
- if (!eval && !tty && !nowait)
+ if (!eval && !tty && !nowait && !quiet)
{
printf ("Waiting for Emacs...");
needlf = 2;
fsync (1);
/* Now, wait for an answer and print any messages. */
- while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0)
+ while (exit_status == EXIT_SUCCESS)
{
char *p;
+ do
+ {
+ errno = 0;
+ rl = recv (emacs_socket, string, BUFSIZ, 0);
+ }
+ /* If we receive a signal (e.g. SIGWINCH, which we pass
+ through to Emacs), on some OSes we get EINTR and must retry. */
+ while (rl < 0 && errno == EINTR);
+
+ if (rl <= 0)
+ break;
+
string[rl] = '\0';
p = string + strlen (string) - 1;
printf ("\n");
fprintf (stderr, "*ERROR*: %s", str);
needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n';
+ exit_status = EXIT_FAILURE;
}
#ifdef SIGSTOP
else if (strprefix ("-suspend ", string))
if (needlf)
printf ("\n");
printf ("*ERROR*: Unknown message: %s", string);
- needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n';
+ needlf = string[0]
+ == '\0' ? needlf : string[strlen (string) - 1] != '\n';
}
}
fflush (stdout);
fsync (1);
+ if (rl < 0)
+ exit_status = EXIT_FAILURE;
+
CLOSE_SOCKET (emacs_socket);
- return EXIT_SUCCESS;
+ return exit_status;
}
#endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
#endif /* ! HAVE_STRERROR */
-/* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7
- (do not change this comment) */
/* emacsclient.c ends here */
HCoop / bpt / emacs.git / blobdiff