/* 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. 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 3 of the License, 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. If not, see . */ #define NO_SHORTNAMES #ifdef HAVE_CONFIG_H #include #endif #ifdef WINDOWSNT /* config.h defines these, which disables sockets altogether! */ # undef _WINSOCKAPI_ # undef _WINSOCK_H # include # include # include # include # define NO_SOCKETS_IN_FILE_SYSTEM # define HSOCKET SOCKET # define CLOSE_SOCKET closesocket # define INITIALIZE() (initialize_sockets ()) #else /* !WINDOWSNT */ # include "syswait.h" # ifdef HAVE_INET_SOCKETS # include # endif # include # define INVALID_SOCKET -1 # define HSOCKET int # define CLOSE_SOCKET close # define INITIALIZE() # ifndef WCONTINUED # define WCONTINUED 8 # endif #endif /* !WINDOWSNT */ #undef signal #include #include #include #include "getopt.h" #ifdef HAVE_UNISTD_H #include #endif #ifdef WINDOWSNT # include #else /* not WINDOWSNT */ # include #endif /* not WINDOWSNT */ #include #include #include char *getenv (), *getwd (); char *(getcwd) (); #ifdef WINDOWSNT char *w32_getenv (); #define egetenv(VAR) w32_getenv(VAR) #else #define egetenv(VAR) getenv(VAR) #endif #ifndef VERSION #define VERSION "unspecified" #endif #ifndef EXIT_SUCCESS #define EXIT_SUCCESS 0 #endif #ifndef EXIT_FAILURE #define EXIT_FAILURE 1 #endif #ifndef FALSE #define FALSE 0 #endif #ifndef TRUE #define TRUE 1 #endif #ifndef NO_RETURN #define NO_RETURN #endif /* Additional space when allocating buffers for filenames, etc. */ #define EXTRA_SPACE 100 /* Name used to invoke this program. */ 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 args are expressions to be evaluated. --eval. */ int eval = 0; /* Nonzero means don't open a new frame. Inverse of --create-frame. */ int current_frame = 1; /* Nonzero means open a new graphical frame. */ int window_system = 0; /* The display on which Emacs should work. --display. */ char *display = NULL; /* Nonzero means open a new Emacs frame on the current terminal. */ int tty = 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; const char *start_timeout = NULL; int start_timeout_int = -1; /* If non-NULL, the filename of the UNIX socket. */ char *socket_name = NULL; /* If non-NULL, the filename of the authentication file. */ char *server_file = NULL; /* FIX-ME: saved_server_file is just a trick to keep the code similar to the CVS code until E and J had changed their minds. */ char saved_server_file[MAX_PATH+1]; /* PID of the Emacs server process. */ int emacs_pid = 0; void print_help_and_exit () NO_RETURN; struct option longopts[] = { { "no-wait", no_argument, NULL, 'n' }, { "eval", no_argument, NULL, 'e' }, { "help", no_argument, NULL, 'H' }, { "version", no_argument, NULL, 'V' }, { "tty", no_argument, NULL, 't' }, { "nw", no_argument, NULL, 't' }, { "create-frame", no_argument, NULL, 'c' }, { "alternate-editor", required_argument, NULL, 'a' }, { "start-timeout", required_argument, NULL, 'o' }, #ifndef NO_SOCKETS_IN_FILE_SYSTEM { "socket-name", required_argument, NULL, 's' }, #endif { "server-file", required_argument, NULL, 'f' }, #ifndef WINDOWSNT { "display", required_argument, NULL, 'd' }, #endif { "parent-id", required_argument, NULL, 'p' }, { 0, 0, 0, 0 } }; /* Like malloc but get fatal error if memory is exhausted. */ long * xmalloc (size) unsigned int size; { long *result = (long *) malloc (size); if (result == NULL) { perror ("malloc"); exit (EXIT_FAILURE); } 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) /* From lisp.h */ #ifndef DIRECTORY_SEP #define DIRECTORY_SEP '/' #endif #ifndef IS_DIRECTORY_SEP #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) #endif #ifndef IS_DEVICE_SEP #ifndef DEVICE_SEP #define IS_DEVICE_SEP(_c_) 0 #else #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) #endif #endif #ifndef IS_ANY_SEP #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) #endif /* Return the current working directory. Returns NULL on errors. Any other returned value must be freed with free. This is used only when get_current_dir_name is not defined on the system. */ char* get_current_dir_name () { char *buf; 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 parent directory is searchable but not readable. */ if ((pwd = egetenv ("PWD")) != 0 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) && stat (pwd, &pwdstat) == 0 && stat (".", &dotstat) == 0 && dotstat.st_ino == pwdstat.st_ino && dotstat.st_dev == pwdstat.st_dev #ifdef MAXPATHLEN && strlen (pwd) < MAXPATHLEN #endif ) { buf = (char *) xmalloc (strlen (pwd) + 1); if (!buf) return NULL; strcpy (buf, pwd); } #ifdef HAVE_GETCWD else { size_t buf_size = 1024; buf = (char *) xmalloc (buf_size); if (!buf) return NULL; for (;;) { if (getcwd (buf, buf_size) == buf) break; if (errno != ERANGE) { int tmp_errno = errno; free (buf); errno = tmp_errno; return NULL; } buf_size *= 2; buf = (char *) realloc (buf, buf_size); if (!buf) return NULL; } } #else else { /* We need MAXPATHLEN here. */ buf = (char *) xmalloc (MAXPATHLEN + 1); if (!buf) return NULL; if (getwd (buf) == NULL) { int tmp_errno = errno; free (buf); errno = tmp_errno; return NULL; } } #endif return buf; } #endif void message (int is_error, char *message, ...); void inform (char *message, ...); void error (char *message, ...); void fatal (char *message, ...); void wait_after_message(int); #ifdef WINDOWSNT #include "w32emacsclient.h" #endif /* WINDOWSNT */ int finish_messages (int connected) { int ret = EXIT_SUCCESS; //remove_wait_message(); trace ("enter finish_messages\n"); #ifdef WINDOWSNT trace ("HERE\n"); ret = w32_finish_messages (connected); #else fprintf (stdout, "\n"); fflush (stdout); #endif trace ("exit finish_messages\n"); return ret; } void close_message_window () { #ifdef WINDOWSNT w32_close_message_window (); #endif } void start_wait_message(char *msg) { #ifdef WINDOWSNT w32_start_wait_message(msg); #else fprintf (stdout, msg); fflush (stdout); #endif } void add_to_wait_message(char *message, ...) { char buf[2048]; char *msg = buf; va_list args; va_start (args, message); strcpy (buf, "TRACE: "); msg = strchr (buf, '\0'); vsprintf (msg, message, args); va_end (args); #ifdef MYTRACE strcat (msg, "\n"); fprintf (stdout, buf); fflush (stdout); #endif #ifdef WINDOWSNT trace ("add_to_wait_message 1"); w32_add_to_wait_message(msg); trace ("add_to_wait_message 2"); #else fprintf (stdout, msg); fflush (stdout); #endif } void add_wait_dot() { #ifdef WINDOWSNT w32_add_wait_dot(); #else add_to_wait_message("."); #endif } void wait_after_message(int milliseconds) { #ifdef WINDOWSNT w32_wait_after_message(milliseconds); #else sleep(milliseconds/1000); #endif } void inform (char *message, ...) { char buf [2048]; char *msg = buf; va_list args; va_start (args, message); vsprintf (msg, message, args); va_end (args); #ifdef WINDOWSNT w32_inform_1 (msg); #else strcat(buf, "\n"); fprintf (stdout, buf); fflush (stdout); #endif } void error (char *message, ...) { //trace ("in error 1, message=%s", message); char buf [2048]; char *msg = buf; va_list args; va_start (args, message); //trace ("in error 2"); sprintf (buf, "\n%s: ", progname); msg = strchr (buf, '\0'); //trace ("in error 3, msg=%s", msg); vsprintf (msg, message, args); va_end (args); //trace ("in error 4"); #ifdef WINDOWSNT //trace ("in error 5"); w32_error_1 (msg); #endif strcat(buf, "\n"); fprintf (stderr, buf); fflush (stderr); } void fatal (char *message, ...) { char buf[2048]; char *msg = buf; va_list args; va_start (args, message); sprintf (buf, "\n%s FATAL ERROR: ", progname); msg = strchr (buf, '\0'); vsprintf (msg, message, args); va_end (args); #ifdef WINDOWSNT w32_fatal_1 (msg); #else fprintf (stderr, buf); fflush (stderr); exit(EXIT_FAILURE); // fix-me #endif } /* Display a normal or error message. */ void message (int is_error, char *message, ...) { if (is_error) { char buf [2048]; char *msg = buf; va_list args; sprintf (buf, "\n%s: ", progname); msg = strchr (buf, '\0'); va_start (args, message); vsprintf (msg, message, args); va_end (args); #ifdef WINDOWSNT w32_message_1 (msg, is_error); #else strcat(buf, "\n"); fprintf (stderr, buf); fflush (stderr); #endif } else { //inform (message); char buf [2048]; char *msg = buf; va_list args; va_start (args, message); vsprintf (msg, message, args); va_end (args); #ifdef WINDOWSNT w32_message_2 (msg); #else fprintf (stderr, msg); fprintf (stderr, "\n"); fflush (stderr); #endif } } /* Decode the options from argv and argc. The global variable `optind' will say how many arguments we used up. */ void decode_options (argc, argv) int argc; char **argv; { alternate_editor = egetenv ("ALTERNATE_EDITOR"); #ifndef WINDOWSNT display = egetenv ("DISPLAY"); if (display && strlen (display) == 0) display = NULL; #endif char* env_start_timeout = egetenv ("EMACSCLIENT_START_TIMEOUT"); if (env_start_timeout) { start_timeout = env_start_timeout; } else { start_timeout = "5"; start_timeout = "90"; } optarg = ""; while (1) { int opt = getopt_long (argc, argv, #ifndef NO_SOCKETS_IN_FILE_SYSTEM "VHnea:o:s:f:d:tc", #else "VHnea:o:f:d:tc", #endif longopts, 0); if (opt == EOF) break; 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 'o': start_timeout = optarg; break; #ifndef NO_SOCKETS_IN_FILE_SYSTEM case 's': socket_name = optarg; break; #endif case 'f': server_file = optarg; strcpy(saved_server_file, server_file); server_file = saved_server_file; break; /* We used to disallow this argument in w32, but it seems better to allow it, for the occasional case where the user is connecting with a w32 client to a server compiled with X11 support. */ #if 1 /* !defined WINDOWS */ case 'd': display = optarg; break; #endif case 'n': nowait = 1; break; case 'e': eval = 1; break; case 'V': message (FALSE, "emacsclient %s (patched)", VERSION); exit (EXIT_SUCCESS); break; case 't': tty = 1; current_frame = 0; break; case 'c': current_frame = 0; break; case 'p': parent_id = optarg; current_frame = 0; break; case 'H': print_help_and_exit (); break; default: message (TRUE, "Try `%s --help' for more information\n", progname); exit (EXIT_FAILURE); break; } } if (start_timeout) { if (1 != sscanf(start_timeout, "%d", &start_timeout_int)) { fatal ("Invalid value to --start-timeout=%s", start_timeout); } } /* If the -c option is used (without -t) and no --display argument is provided, try $DISPLAY. Without the -c option, we used to set `display' to $DISPLAY by default, but this changed the default behavior and is sometimes inconvenient. So we force users to use "--display $DISPLAY" if they want Emacs to connect to their current display. */ if (!current_frame && !tty && !display) { display = egetenv ("DISPLAY"); #ifdef NS_IMPL_COCOA /* Under Cocoa, we don't really use displays the same way as in X, so provide a dummy. */ if (!display || strlen (display) == 0) display = "ns"; #endif } /* A null-string display is invalid. */ if (display && strlen (display) == 0) display = NULL; /* If no display is available, new frames are tty frames. */ if (!current_frame && !display) tty = 1; /* --no-wait implies --current-frame on ttys when there are file arguments or expressions given. */ if (nowait && tty && argc - optind > 0) current_frame = 1; if (current_frame) { tty = 0; window_system = 0; } if (tty) window_system = 0; } void print_help_and_exit () { /* Spaces and tabs are significant in this message; they're chosen so the message aligns properly both in a tty and in a Windows message box. Please try to preserve them; otherwise the output is very hard to read when using emacsclientw. */ message (FALSE, "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 version info and return\n\ -H, --help Print this usage information message\n\ -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ -c, --create-frame Create a new frame instead of trying to\n\ 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\ -d DISPLAY, --display=DISPLAY\n\ Visit the file in the given display\n\ --parent-id=ID Open in parent window ID, via XEmbed\n" #ifndef NO_SOCKETS_IN_FILE_SYSTEM "-s SOCKET, --socket-name=SOCKET\n\ Set filename of the UNIX socket for communication\n" #endif "-f SERVER, --server-file=SERVER\n\ Set filename of the TCP authentication file\n\ -a, --alternate-editor=EDITOR\n\ Editor to fallback to if the server is not running\n\ -o, --start-timeout=SECONDS\n\ If given wait that many seconds for emacs server\n\ after launching alternate editor\n\ \n\ This is a patched version that comes with EmacsW32+Emacs.\n\ Before reporting bugs please try the official version first.\n\ If the problem persists then follow the instructions in the\n\ official version to report the bug.\n\ Otherwise report the bug to help-emacs-windows@gnu.org.", progname); exit (EXIT_SUCCESS); } void expand_file_name ( char *file_name, char* new_file_name ) { char *cwd; char srvcwd[MAX_PATH]; char string[BUFSIZ+1]; #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 error ("%s (%s)", "Cannot get current working directory", strerror (errno)); #else error ("%s (%s)", string, strerror (errno)); #endif //fail (argc, argv); fatal("Can't get current working directory"); } #ifdef WINDOWSNT char *fname; char *p = 0; WIN32_FIND_DATA finddata; HANDLE handle; char errbuf[1024]; if (!GetFullPathName (file_name, MAXPATHLEN + 2, new_file_name, &fname)) { sprintf(errbuf, "GetFullPathName for %s", file_name); w32_sys_fatal1(errbuf); } #else /* Fix-me: The code below is for un*xes only! */ //trace ("file_name=%s", file_name); if (file_name_absolute_p (file_name)) { strcpy(new_file_name, file_name); } else { strcpy(new_file_name, cwd); strcat(new_file_name, "/"); strcat(new_file_name, file_name); } #endif } /* Get absolute path to server file */ // Save server_file because it is erased before exit when the GUI // version might still need it: void get_full_server_file(char* buf) { FILE *config = NULL; int found = 0; *buf = '\0'; //trace ("server_file=%s", server_file); if (server_file) { strcpy(saved_server_file, server_file); server_file = saved_server_file; } if (file_name_absolute_p (server_file)) { /* Must expand the file name, at least on w32! (And it can't harm on other systems.) */ expand_file_name(server_file, buf); } else { char *home = egetenv ("HOME"); if (home) { sprintf (buf, "%s/.emacs.d/server/%s", home, server_file); found = (access (buf, R_OK) == 0); } #ifdef WINDOWSNT if (!found && (home = egetenv ("APPDATA"))) { sprintf (buf, "%s/.emacs.d/server/%s", home, server_file); } #endif } } /* Launch emacs or alternate editor */ void launch_editor () { // Fix-me: buffers too small char cmd_line[MAX_PATH+16]; char full_server_file[MAX_PATH]; char *p; char mypath[MAX_PATH]; #ifdef WINDOWSNT char w32exepath[MAX_PATH]; char *emacsexe = "runemacs.exe"; char *systemexec = "systemexec.exe"; #else char *emacsexe = "emacs"; char *systemexec = "systemexec"; #endif //trace ("launch_editor"); strcpy(mypath, ""); if (server_file) { char setbuf[MAX_PATH+32]; //trace ("launch_editor call get_full_server_file"); get_full_server_file(full_server_file); strcpy(setbuf, "EMACS_SERVER_FILE="); strcat(setbuf, full_server_file); putenv(setbuf); strcpy(setbuf, "EMACSCLIENT_STARTING_SERVER=yes"); putenv(setbuf); } if (alternate_editor) { strcpy(cmd_line, alternate_editor); } else { strcpy(cmd_line, ""); if ( get_emacs_bin_dir( mypath, MAX_PATH ) ) { //strcat(mypath, "/bin/"); //fprintf (stdout, "emacs bin dir=%s\n", mypath); fflush (stdout); } if (strlen(mypath) == 0) /* Get a possibly relative path to emacs bin directory. */ { if (main_argv[0]) strcpy(mypath, main_argv[0]); char* p = strstr(mypath, "emacsclient"); if (p) { *p = '\0'; } else { strcpy(mypath, ""); } } strcpy(cmd_line, ""); if (mypath[0] != '"') strcat(cmd_line, "\""); strcat(cmd_line, mypath); strcat(cmd_line, emacsexe); if (mypath[0] != '"') strcat(cmd_line, "\""); strcpy(w32exepath, mypath); strcat(w32exepath, emacsexe); //fprintf (stdout, "w32exepath=%s\n", w32exepath); fflush (stdout); if (strlen(mypath) > 0) { if (access (w32exepath, R_OK) != 0) fatal("Can't find %s", w32exepath); //fprintf (stdout, "Jumping over execute access test\n"); fflush(stdout); /* if (access (w32exepath, X_OK) != 0) */ /* fatal("Can't execute %s", w32exepath); */ } // Fix-me: New font backend unusable yet: // strcat(cmd_line, " --disable-font-backend"); strcat(cmd_line, " -l auto-server"); } #ifdef WINDOWSNT //trace("WINDOSWNT"); { STARTUPINFO start; PROCESS_INFORMATION child; memset (&start, 0, sizeof (start)); start.cb = sizeof (start); start.dwFlags = STARTF_USESHOWWINDOW | STARTF_USECOUNTCHARS; start.wShowWindow = SW_HIDE; /* Ensure that we don't waste memory if the user has specified a huge default screen buffer for command windows. */ start.dwXCountChars = 80; start.dwYCountChars = 25; //fprintf(stdout, "CreateProcess (NULL, cmd_line, NULL, NULL, TRUE, NORMAL_PRIORITY_CLASS, NULL, NULL, &start, &child)\n"); //fprintf (stdout, "cmd_line=%s\n", cmd_line); fflush (stdout); if (!CreateProcess (NULL, cmd_line, NULL, NULL, TRUE, NORMAL_PRIORITY_CLASS, NULL, NULL, &start, &child)) { error ("Could not run %s", cmd_line); w32_sys_fatal1("CreateProcess"); } CloseHandle( child.hProcess ); CloseHandle( child.hThread ); } #else /* not WINDOWSNT */ #ifdef HAVE_WORKING_VFORK //trace("FORK"); signal(SIGCLD, SIG_IGN); /* So the fork child can finish without wait here */ switch(pid=fork()) { case -1: fatal ("fork error, still in parent - %s", strerror(errno)); case 0: //trace("forked ok, in CHILD!"); { int i = optind - 1; execvp (cmd_line, main_argv + i); } fatal ("fork, child - error executing alternate editor \"%s\": %s", cmd_line, strerror(errno)); default: //trace("forked ok, in PARENT!"); } #else /* no working fork */ //trace("NO FORK"); { char system_cmd_line[MAX_PATH*2]; if (strlen(mypath)) { strcpy(system_cmd_line, mypath); strcat(system_cmd_line, systemexec); if (access (system_cmd_line, X_OK) != 0) { fatal("Can't find %s", system_cmd_line); } } else { strcpy(system_cmd_line, systemexec); } strcat(system_cmd_line, " "); strcat(system_cmd_line, cmd_line); //trace("system_cmd_line=%s", system_cmd_line); int ret; switch (ret = system(system_cmd_line)) { case EXIT_SUCCESS: break; case EXIT_FAILURE: fatal("Error, 'system(%s)' returned EXIT_FAILURE, strerror(errno)=%s", system_cmd_line, strerror(errno)); case -1: fatal("Error, 'system(%s)' returned -1, strerror(errno)=%s", system_cmd_line, strerror(errno)); default: /* w32 ret=25: "systemexec emacs -l auto-server", where emacs is not in the path w32 ret=37: "systemexec.exe oo-spd\i386\emacs -l auto-server", where emacs is not there w32 ret=59: "xc:\path\systemexec.exe oo-spd\i386\emacs -l auto-server" */ fatal("Error, 'system(%s)' returned %d, strerror(errno)=%s", system_cmd_line, ret, strerror(errno)); } } #endif #endif //trace("after starting %s", cmd_line); } /* Try to run a different command, or --if no alternate editor is defined-- exit with an errorcode. Uses argv, but gets it from the global variable main_argv. */ void fail (void) { if (alternate_editor) { int i = optind - 1; execvp (alternate_editor, main_argv + i); message (TRUE, "%s: error executing alternate editor \"%s\"\n", progname, alternate_editor); } exit (EXIT_FAILURE); } #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) int main (argc, argv) int argc; char **argv; { main_argv = argv; progname = argv[0]; message (TRUE, "%s: Sorry, the Emacs server is supported only\n" "on systems with Berkeley sockets.\n", argv[0]); fail (); } #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ #ifdef WINDOWSNT # include #else # include # include # include #endif #define AUTH_KEY_LENGTH 64 #define SEND_BUFFER_SIZE 4096 extern char *strerror (); /* Buffer to accumulate data to send in TCP connections. */ char send_buffer[SEND_BUFFER_SIZE + 1]; int sblen = 0; /* Fill pointer for the send buffer. */ /* Socket used to communicate with the Emacs server process. */ HSOCKET emacs_socket = 0; /* On Windows, the socket library was historically separate from the standard C library, so errors are handled differently. */ void sock_err_message (function_name) char *function_name; { #ifdef WINDOWSNT char* msg = NULL; FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_ARGUMENT_ARRAY, NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); message (TRUE, "%s: %s: %s\n", progname, function_name, msg); LocalFree (msg); #else message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); #endif } /* Let's send the data to Emacs when either - the data ends in "\n", or - the buffer is full (but this shouldn't happen) Otherwise, we just accumulate it. */ void send_to_emacs (s, data) HSOCKET s; char *data; { while (data) { int dlen = strlen (data); if (dlen + sblen >= SEND_BUFFER_SIZE) { int part = SEND_BUFFER_SIZE - sblen; strncpy (&send_buffer[sblen], data, part); data += part; sblen = SEND_BUFFER_SIZE; } else if (dlen) { strcpy (&send_buffer[sblen], data); data = NULL; sblen += dlen; } else break; if (sblen == SEND_BUFFER_SIZE || (sblen > 0 && send_buffer[sblen-1] == '\n')) { int sent = send (s, send_buffer, sblen, 0); if (sent != sblen) strcpy (send_buffer, &send_buffer[sent]); sblen -= sent; } } } /* In STR, 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. Does not change the string. Outputs the result to STREAM. */ void quote_argument (s, str) HSOCKET s; char *str; { char *copy = (char *) xmalloc (strlen (str) * 2 + 1); char *p, *q; p = str; q = copy; while (*p) { if (*p == ' ') { *q++ = '&'; *q++ = '_'; p++; } else if (*p == '\n') { *q++ = '&'; *q++ = 'n'; p++; } else { if (*p == '&' || (*p == '-' && p == str)) *q++ = '&'; *q++ = *p++; } } *q++ = 0; send_to_emacs (s, copy); free (copy); } /* The inverse of quote_argument. Removes quoting in string STR by modifying the string in place. Returns STR. */ char * unquote_argument (str) char *str; { char *p, *q; if (! str) return str; p = str; q = str; while (*p) { if (*p == '&') { p++; if (*p == '&') *p = '&'; else if (*p == '_') *p = ' '; else if (*p == 'n') *p = '\n'; else if (*p == '-') *p = '-'; } *q++ = *p++; } *q = 0; return str; } /* file_name_absolute_p just checks if the file name is an absolute path. It may still need expansion if sent to another process! */ int file_name_absolute_p (filename) const unsigned char *filename; { /* Sanity check, it shouldn't happen. */ if (! filename) fatal("filename is NULL in file_name_absolute_p"); /* /xxx is always an absolute path. */ if (filename[0] == '/') return TRUE; /* Empty filenames (which shouldn't happen) are relative. */ if (filename[0] == '\0') fatal("filename is \"\" in file_name_absolute_p"); #ifdef WINDOWSNT /* X:\xxx is always absolute. */ if (isalpha (filename[0]) && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) return TRUE; /* Both \xxx and \\xxx\yyy are absolute. */ if (filename[0] == '\\' && filename[1] == '\\') return TRUE; /* \\xxx\yyy is absolute. \xxx is also absolute, but still have to be expanded on w32 if the file name should be sent to another process. FIXME: There's a corner case not dealt with, "x:y", where: 1) x is a valid drive designation (usually a letter in the A-Z range) and y is a path, relative to the current directory on drive x. This is absolute, *after* fixing the y part to include the current directory in x. 2) x is a relative file name, and y is an NTFS stream name. This is a correct relative path, but it is very unusual. The trouble is that first case items are also valid examples of the second case, i.e., "c:test" can be understood as drive:path or as file:stream. The "right" fix would involve checking whether - the current drive/partition is NTFS, - x is a valid (and accesible) drive designator, - x:y already exists as a file:stream in the current directory, - y already exists on the current directory of drive x, - the auspices are favorable, and then taking an "informed decision" based on the above. Whatever the result, Emacs currently does a very bad job of dealing with NTFS file:streams: it cannot visit them, and the only way to create one is by setting `buffer-file-name' to point to it (either manually or with emacsclient). So perhaps resorting to 1) and ignoring 2) for now is the right thing to do. Anyway, something to decide After the Release. */ #else /* /xxx is always an absolute path. */ if (filename[0] == '/') return TRUE; #endif return FALSE; } void display_last_network_error(is_fatal, fmt) int is_fatal; char* fmt; { char buf[2048]; char err[2048]; #ifdef WINDOWSNT DWORD dwError = WSAGetLastError(); w32_get_error_text(dwError, err, 2048); /* Remove \n */ err[strlen(err) - 1] = '\0'; #else strcpy(err, strerror(errno)); #endif sprintf(buf, fmt, err); if (is_fatal) fatal(buf); else error(buf); } void fatal_network_error(char* fmt) { display_last_network_error(TRUE, fmt); } void network_error(char* fmt) { display_last_network_error(FALSE, fmt); } /* * Read the information needed to set up a TCP comm channel with * the Emacs server: host, port, pid and authentication string. */ int get_server_config (server, authentication, islocal) struct sockaddr_in *server; char *authentication; int *islocal; { char dotted[32]; char *port; char *pid; FILE *config = NULL; char full_server_file[MAX_PATH]; char myhostname[255]; struct hostent *myhostent; //trace ("get_server_config call get_full_server_file"); get_full_server_file(full_server_file); //trace("full_server_file=%s", full_server_file); config = fopen (full_server_file, "rb"); if (! config) return FALSE; if (fgets (dotted, sizeof dotted, config) && (port = strchr (dotted, ':')) && (pid = strchr (port, ' '))) { *port++ = '\0'; *pid++ = '\0'; } else { message (TRUE, "%s: invalid configuration info\n", progname); exit (EXIT_FAILURE); } //trace ("dotted=%s", dotted); if (0 == strcmp("127.0.0.1", dotted)) { *islocal = 1; } else { *islocal = 0; gethostname(myhostname, 255); myhostent = gethostbyname(myhostname); if (NULL == myhostent) fatal_network_error("Error calling gethostbyname(): %s\n"); //printf("Hostname : %s\n",myhostent->h_name); /* prints the hostname */ //printf("IP Address: %s\n",inet_ntoa(*((struct in_addr *)myhostent->h_addr))); /* prints IP address */ if (0 == strcmp(dotted, inet_ntoa(*((struct in_addr *)myhostent->h_addr)))) { *islocal = 1; } else { int i = 0; struct in_addr myaddr; while (! *islocal) { u_long *address = (u_long *) myhostent->h_addr_list[i++]; if (address == 0) break; myaddr.S_un.S_addr = *address; if (0 == strcmp(dotted, inet_ntoa (myaddr))) *islocal = 1; } } } server->sin_family = AF_INET; server->sin_addr.s_addr = inet_addr (dotted); server->sin_port = htons (atoi (port)); if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) { message (TRUE, "%s: cannot read authentication info\n", progname); exit (EXIT_FAILURE); } fclose (config); emacs_pid = atoi (pid); return TRUE; } HSOCKET set_tcp_socket (silent, islocal) int silent; int *islocal; { HSOCKET s; struct sockaddr_in server; struct linger l_arg = {1, 1}; char auth_string[AUTH_KEY_LENGTH + 1]; int islocal2 = -1; if (-1 == islocal2) if (! get_server_config (&server, auth_string, &islocal2)) { return INVALID_SOCKET; } *islocal = islocal2; if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) message (FALSE, "%s: connected to remote socket at %s\n", progname, inet_ntoa (server.sin_addr)); /* * Open up an AF_INET socket */ if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) { network_error ("socket: %s"); return INVALID_SOCKET; } /* * Set up the socket */ if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) { if (!silent) network_error ("connect 1: %s"); return INVALID_SOCKET; } setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); /* * Send the authentication */ auth_string[AUTH_KEY_LENGTH] = '\0'; send_to_emacs (s, "-auth "); send_to_emacs (s, auth_string); send_to_emacs (s, "\n"); return s; } /* Returns 1 if PREFIX is a prefix of STRING. */ static int strprefix (char *prefix, char *string) { return !strncmp (prefix, string, strlen (prefix)); } #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) /* Three possibilities: 2 - can't be `stat'ed (sets errno) 1 - isn't owned by us 0 - success: none of the above */ static int socket_status (socket_name) char *socket_name; { struct stat statbfr; if (stat (socket_name, &statbfr) == -1) return 2; if (statbfr.st_uid != geteuid ()) return 1; return 0; } /* 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; } /* Signal handler for SIGCONT; notify the Emacs process that it can now resume our tty frame. */ SIGTYPE handle_sigcont (int signalnum) { int old_errno = errno; if (tcgetpgrp (1) == getpgrp ()) { /* We are in the foreground. */ send_to_emacs (emacs_socket, "-resume \n"); } else { /* We are in the background; cancel the continue. */ kill (getpid (), SIGSTOP); } signal (signalnum, handle_sigcont); errno = old_errno; } /* Signal handler for SIGTSTP; notify the Emacs process that we are going to sleep. Normally the suspend is initiated by Emacs via server-handle-suspend-tty, but if the server gets out of sync with reality, we may get a SIGTSTP on C-z. Handling this signal and notifying Emacs about it should get things under control again. */ SIGTYPE handle_sigtstp (int signalnum) { int old_errno = errno; sigset_t set; if (emacs_socket) send_to_emacs (emacs_socket, "-suspend \n"); /* Unblock this signal and call the default handler by temporarily changing the handler and resignalling. */ sigprocmask (SIG_BLOCK, NULL, &set); sigdelset (&set, signalnum); signal (signalnum, SIG_DFL); kill (getpid (), signalnum); sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ signal (signalnum, handle_sigtstp); 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 signal (SIGCONT, handle_sigcont); signal (SIGTSTP, handle_sigtstp); signal (SIGTTOU, handle_sigtstp); } HSOCKET set_local_socket (silent) int silent; { HSOCKET s; struct sockaddr_un server; /* * Open up an AF_UNIX socket in this person's home directory */ if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) { network_error ("socket: %s"); return INVALID_SOCKET; } server.sun_family = AF_UNIX; { int sock_status = 0; int default_sock = !socket_name; int saved_errno = 0; char *server_name = "server"; if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) { /* socket_name is a file name component. */ server_name = socket_name; socket_name = NULL; default_sock = 1; /* Try both UIDs. */ } if (default_sock) { socket_name = alloca (100 + strlen (server_name)); sprintf (socket_name, "/tmp/emacs%d/%s", (int) geteuid (), server_name); } if (strlen (socket_name) < sizeof (server.sun_path)) strcpy (server.sun_path, socket_name); else { message (TRUE, "%s: socket-name %s too long\n", progname, socket_name); fail (); } /* See if the socket exists, and if it's owned by us. */ sock_status = socket_status (server.sun_path); 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 *) egetenv ("LOGNAME"); if (!user_name) user_name = (char *) egetenv ("USER"); if (user_name) { struct passwd *pw = getpwnam (user_name); if (pw && (pw->pw_uid != geteuid ())) { /* We're running under su, apparently. */ socket_name = alloca (100 + strlen (server_name)); sprintf (socket_name, "/tmp/emacs%d/%s", (int) pw->pw_uid, server_name); if (strlen (socket_name) < sizeof (server.sun_path)) strcpy (server.sun_path, socket_name); else { message (TRUE, "%s: socket-name %s too long\n", progname, socket_name); exit (EXIT_FAILURE); } sock_status = socket_status (server.sun_path); saved_errno = errno; } else errno = saved_errno; } } switch (sock_status) { case 1: /* There's a socket, but it isn't owned by us. This is OK if we are root. */ if (0 != geteuid ()) { message (TRUE, "%s: Invalid socket owner\n", progname); return INVALID_SOCKET; } break; case 2: /* `stat' failed */ if (saved_errno == ENOENT) message (TRUE, "%s: can't find socket; have you started the server?\n\ To start the server in Emacs, type \"M-x server-start\".\n", progname); else message (TRUE, "%s: can't stat %s: %s\n", progname, server.sun_path, strerror (saved_errno)); return INVALID_SOCKET; } } if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) < 0) { if (!silent) network_error ("connect 2: %s"); return INVALID_SOCKET; } return s; } #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ HSOCKET set_socket (silent, islocal) int silent; int *islocal; { HSOCKET s; int islocal2; INITIALIZE (); *islocal = 1; islocal2 = 1; #ifndef NO_SOCKETS_IN_FILE_SYSTEM /* Explicit --socket-name argument. */ if (socket_name) { s = set_local_socket (silent); //if ((s != INVALID_SOCKET) || alternate_editor) return s; message (TRUE, "%s: error accessing socket \"%s\"\n", progname, socket_name); exit (EXIT_FAILURE); } #endif /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ if (!server_file) server_file = egetenv ("EMACS_SERVER_FILE"); if (server_file) { s = set_tcp_socket (silent, &islocal2); *islocal = islocal2; //if ((s != INVALID_SOCKET) || alternate_editor) return s; message (TRUE, "%s: error accessing server file \"%s\"\n", progname, server_file); exit (EXIT_FAILURE); } #ifndef NO_SOCKETS_IN_FILE_SYSTEM /* Implicit local socket. */ s = set_local_socket (silent); if (s != INVALID_SOCKET) return s; #endif /* Implicit server file. */ server_file = "server"; s = set_tcp_socket (silent, &islocal2); *islocal = islocal2; //if ((s != INVALID_SOCKET) || alternate_editor) return s; return INVALID_SOCKET; /* No implicit or explicit socket, and no alternate editor. */ message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" #ifndef NO_SOCKETS_IN_FILE_SYSTEM "\t--socket-name\n" #endif "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", progname); exit (EXIT_FAILURE); } void give_focus () { #ifdef WINDOWSNT w32_give_focus (); #endif } int main (argc, argv) int argc; char **argv; { int i, rl, needlf = 0; char *cwd, *str; char string[BUFSIZ+1]; int connected = 0; // Fix-me: set connected value main_argv = argv; progname = argv[0]; /* Process options. */ decode_options (argc, argv); //trace ("argc=%d, optind=%d, eval=%d\n", argc, optind, eval); if ((argc - optind < 1) && !eval) { if (0 && !tty && !window_system) { message (TRUE, "%s: file name or argument required\n" "Try `%s --help' for more information\n", progname, progname); exit (EXIT_FAILURE); } } /* if ((emacs_socket = set_socket ()) == INVALID_SOCKET) */ /* fail (); */ /* No message box popups when we wait. */ int islocal = 1; //trace("connect_to_server"); if ((emacs_socket = set_socket ( alternate_editor || (start_timeout_int > 0) , &islocal)) == INVALID_SOCKET) { //trace ("no old socket"); if (alternate_editor || (islocal && (start_timeout_int > 0))) { launch_editor(); } else { if (islocal) { error("The requested local Emacs server is not running"); } else { error("The requested Emacs remote server is not running"); } //return 0; goto teardown; } start_wait_message("Waiting for Emacs server to start ."); while ( ((emacs_socket = set_socket ( 1 != start_timeout_int, &islocal )) == INVALID_SOCKET) && (start_timeout_int-- > 0) ) { if (start_timeout_int == 0) { error("Timeout waiting for server"); goto teardown; } else { add_wait_dot(); wait_after_message(1000); } if (g_bExitRequested) //return 0; goto teardown; } add_to_wait_message(" connected."); connected = 1; } cwd = get_current_dir_name (); if (cwd == 0) { /* getwd puts message in STRING if it fails. */ message (TRUE, "%s: %s\n", progname, "Cannot get current working directory"); fail (); } give_focus (); if ((argc - optind < 1) && !eval && !window_system) { /* If there is nothing to do just raise the selected frame */ send_to_emacs (emacs_socket, "-eval (raise-frame) "); } /* Send over our environment. */ if (!current_frame) { extern char **environ; int i; for (i = 0; environ[i]; i++) { char *name = xstrdup (environ[i]); char *value = strchr (name, '='); send_to_emacs (emacs_socket, "-env "); quote_argument (emacs_socket, environ[i]); send_to_emacs (emacs_socket, " "); } } /* Send over our current directory. */ if (!current_frame) { send_to_emacs (emacs_socket, "-dir "); quote_argument (emacs_socket, cwd); send_to_emacs (emacs_socket, "/"); send_to_emacs (emacs_socket, " "); } retry: trace ("retry: current_frame=%d, display=%s, window_system=%d, tty=%d\n", current_frame, display, window_system, tty); if (nowait) send_to_emacs (emacs_socket, "-nowait "); if (current_frame) send_to_emacs (emacs_socket, "-current-frame "); if (display) { send_to_emacs (emacs_socket, "-display "); quote_argument (emacs_socket, display); send_to_emacs (emacs_socket, " "); } if (tty) { trace ("is tty"); char *type = egetenv ("TERM"); char *tty_name = NULL; #ifndef WINDOWSNT tty_name = ttyname (fileno (stdin)); #endif if (! tty_name) { message (TRUE, "%s: could not get terminal name\n", progname); fail (); } if (! type) { message (TRUE, "%s: please set the TERM variable to your terminal type\n", progname); fail (); } if (! strcmp (type, "eterm")) { /* This causes nasty, MULTI_KBOARD-related input lockouts. */ message (TRUE, "%s: opening a frame in an Emacs term buffer" " is not supported\n", progname); fail (); } #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) init_signals (); #endif send_to_emacs (emacs_socket, "-tty "); quote_argument (emacs_socket, tty_name); send_to_emacs (emacs_socket, " "); quote_argument (emacs_socket, type); send_to_emacs (emacs_socket, " "); } if (window_system) send_to_emacs (emacs_socket, "-window-system "); if ((argc - optind > 0)) { for (i = optind; i < argc; i++) { int relative = 0; if (eval) { /* Don't prepend cwd or anything like that. */ send_to_emacs (emacs_socket, "-eval "); quote_argument (emacs_socket, argv[i]); send_to_emacs (emacs_socket, " "); continue; } trace ("argv[i]=%s", argv[i]); if (*argv[i] == '+') { char *p = argv[i] + 1; while (isdigit ((unsigned char) *p) || *p == ':') p++; if (*p == 0) { send_to_emacs (emacs_socket, "-position "); quote_argument (emacs_socket, argv[i]); send_to_emacs (emacs_socket, " "); continue; } else relative = 1; } else if (! file_name_absolute_p (argv[i])) #ifndef WINDOWSNT relative = 1; #else /* Call GetFullPathName so filenames of the form X:Y, where X is a valid drive designator, are interpreted as drive:path, not file:stream, and treated as absolute. The user can still pass a file:stream if desired (for example, .\X:Y), but it is not very useful, as Emacs currently does a very bad job of dealing wih NTFS streams. */ { char *filename = (char *) xmalloc (MAX_PATH); DWORD size; size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); if (size > 0 && size < MAX_PATH) argv[i] = filename; else { relative = 1; free (filename); } } #endif send_to_emacs (emacs_socket, "-file "); if (relative) { quote_argument (emacs_socket, cwd); send_to_emacs (emacs_socket, "/"); } trace ("argv[i] => emacs %s", argv[i]); quote_argument (emacs_socket, argv[i]); send_to_emacs (emacs_socket, " "); } } else if ((argc - optind < 1) && !eval) { /* Do not wait if there are no arguments */ nowait = 1; } else { trace ("before !tty && !window_system"); if (!tty && !window_system) { while ((str = fgets (string, BUFSIZ, stdin))) { trace ("in while"); if (eval) send_to_emacs (emacs_socket, "-eval "); else send_to_emacs (emacs_socket, "-file "); quote_argument (emacs_socket, str); } send_to_emacs (emacs_socket, " "); } } send_to_emacs (emacs_socket, "\n"); trace ("before Wait for an answer."); /* Wait for an answer. */ //finish_messages (connected); // Remove window if (!eval && !tty && !nowait) { trace ("before add_to_wait_message for an answer."); add_to_wait_message ("Waiting for Emacs..."); trace ("Before wait_after_message"); wait_after_message(1000); trace ("Before close_message_window"); close_message_window (); trace ("after add_to_wait_message for an answer."); needlf = 2; } fflush (stdout); fsync (1); /* Now, wait for an answer and print any messages. */ trace ("before while."); while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) { trace ("while rl"); char *p; string[rl] = '\0'; p = string + strlen (string) - 1; while (p > string && *p == '\n') *p-- = 0; if (strprefix ("-emacs-pid ", string)) { /* -emacs-pid PID: The process id of the Emacs process. */ emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); } else if (strprefix ("-window-system-unsupported ", string)) { /* -window-system-unsupported: Emacs was compiled without X support. Try again on the terminal. */ window_system = 0; nowait = 0; tty = 1; goto retry; } else if (strprefix ("-print ", string)) { /* -print STRING: Print STRING on the terminal. */ str = unquote_argument (string + strlen ("-print ")); if (needlf) add_to_wait_message ("\n"); add_to_wait_message ("%s", str); needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; } else if (strprefix ("-error ", string)) { /* -error DESCRIPTION: Signal an error on the terminal. */ str = unquote_argument (string + strlen ("-error ")); if (needlf) add_to_wait_message ("\n"); fprintf (stderr, "*ERROR*: %s", str); add_to_wait_message ("*ERROR*: %s", str); needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; } #ifdef SIGSTOP else if (strprefix ("-suspend ", string)) { /* -suspend: Suspend this terminal, i.e., stop the process. */ if (needlf) add_to_wait_message ("\n"); needlf = 0; kill (0, SIGSTOP); } #endif else { /* Unknown command. */ if (needlf) add_to_wait_message ("\n"); add_to_wait_message ("*ERROR*: Unknown message: %s", string); needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; } } trace ("after wait loop"); if (needlf) add_to_wait_message ("\n"); fflush (stdout); fsync (1); CLOSE_SOCKET (emacs_socket); //return EXIT_SUCCESS; teardown: // Eh? ; int exitval = finish_messages (connected); /* Kai Tetzlaff's patch is applied below. His comment on it: If connected is different from 0, emacs_socket will always also be != INVALID_SOCKET. The original GNU version returns a non zero value only when called without a file name. So by doing the socket check and by using exitval the patched version is already doing more checking than the GNU original. My comment: I prefer his original version since it is a bit easier to understand. */ // if (connected) if (connected || INVALID_SOCKET != emacs_socket) exit(exitval); else exit(EXIT_FAILURE); } #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ #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 */ /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 (do not change this comment) */ /* emacsclient.c ends here */