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0
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1 /* Client process that communicates with GNU Emacs acting as server.
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2 Copyright (C) 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GNU Emacs; see the file COPYING. If not, write to
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18 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.28. */
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22
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23 #define NO_SHORTNAMES
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24 #include <../src/config.h>
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25 #undef read
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26 #undef write
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27 #undef open
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28 #undef close
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29 #undef signal
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30
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31 #if __STDC__ || defined(STDC_HEADERS)
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32 #include <stdlib.h>
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33 #include <unistd.h>
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34 #include <fcntl.h> /* for creat() */
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35 #include <string.h>
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36 #endif
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37
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38 #if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC)
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39 #include <stdio.h>
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40
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70
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41 main (argc, argv)
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42 int argc;
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43 char **argv;
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0
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44 {
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45 fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n",
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46 argv[0]);
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47 fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n");
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48 exit (1);
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49 }
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50
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51 #else /* HAVE_SOCKETS or HAVE_SYSVIPC */
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52
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53 #if ! defined (HAVE_SYSVIPC)
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54 /* BSD code is very different from SYSV IPC code */
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55
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56 #include <sys/types.h>
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57 #include <sys/socket.h>
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58 #include <sys/un.h>
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59 #include <sys/stat.h>
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60 #include <stdio.h>
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61 #include <errno.h>
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62
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63 extern char *strerror ();
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64 extern int errno;
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65
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70
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66 void
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67 main (argc, argv)
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68 int argc;
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69 char **argv;
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0
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70 {
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71 char system_name[256];
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72 int s, i;
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73 FILE *out;
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74 struct sockaddr_un server;
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75 char *cwd, *str;
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76 char string[BUFSIZ];
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77
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78 if (argc < 2)
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79 {
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80 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
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81 exit (1);
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82 }
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83
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84 /*
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85 * Open up an AF_UNIX socket in this person's home directory
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86 */
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87
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88 if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
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89 {
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90 fprintf (stderr, "%s: ", argv[0]);
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91 perror ("socket");
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92 exit (1);
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93 }
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94 server.sun_family = AF_UNIX;
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95 #ifndef SERVER_HOME_DIR
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96 {
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97 struct stat statbfr;
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98
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99 gethostname (system_name, sizeof (system_name));
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100 sprintf (server.sun_path, "/tmp/esrv%d-%s", (int) geteuid (), system_name);
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101
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102 if (stat (server.sun_path, &statbfr) == -1)
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103 {
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104 if (errno == ENOENT)
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105 fprintf (stderr,
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106 "Can't find socket; have you started the server?\n");
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107 else
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108 perror ("stat");
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109 exit (1);
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110 }
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111 if (statbfr.st_uid != geteuid())
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112 {
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113 fprintf (stderr, "Illegal socket owner\n");
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114 exit (1);
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115 }
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116 }
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117 #else
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118 if (getenv ("HOME") == NULL)
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119 {
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120 fprintf (stderr, "%s: No home directory\n", argv[0]);
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121 exit (1);
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122 }
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123 sprintf (server.sun_path, "/tmp/esrv%d", geteuid ());
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124 #if 0
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125 strcpy (server.sun_path, getenv ("HOME"));
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126 strcat (server.sun_path, "/.emacs_server");
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127 #endif
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128 #endif /* SERVER_HOME_DIR */
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129 if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
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130 < 0)
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131 {
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132 fprintf (stderr, "%s: ", argv[0]);
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133 perror ("connect");
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134 exit (1);
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135 }
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136 if ((out = (FILE *) fdopen (s, "r+")) == NULL)
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137 {
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138 fprintf (stderr, "%s: ", argv[0]);
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139 perror ("fdopen");
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140 exit (1);
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141 }
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142
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143 #ifdef BSD
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144 cwd = (char *) getwd (string);
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145 #else
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146 cwd = (char *) getcwd (string, sizeof (string));
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147 #endif
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148
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149 if (cwd == 0)
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150 {
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151 /* getwd puts message in STRING if it fails. */
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152 fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
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153 exit (1);
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154 }
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155
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156 for (i = 1; i < argc; i++)
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157 {
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158 if (*argv[i] == '+')
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159 {
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160 char *p = argv[i] + 1;
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161 while (*p >= '0' && *p <= '9') p++;
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162 if (*p != 0)
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163 fprintf (out, "%s/", cwd);
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164 }
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165 else if (*argv[i] != '/')
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166 fprintf (out, "%s/", cwd);
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167 fprintf (out, "%s ", argv[i]);
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168 }
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169 fprintf (out, "\n");
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170 fflush (out);
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171
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172 printf ("Waiting for Emacs...");
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173 fflush (stdout);
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174
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175 rewind (out); /* re-read the output */
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176 str = fgets (string, BUFSIZ, out);
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177
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178 /* Now, wait for an answer and print any messages. */
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179
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180 while ((str = fgets (string, BUFSIZ, out)))
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181 printf ("%s", str);
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182
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70
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183 exit (0);
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0
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184 }
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185
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186 #else /* This is the SYSV IPC section */
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187
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188 #include <sys/types.h>
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189 #include <sys/ipc.h>
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190 #include <sys/msg.h>
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191 #include <stdio.h>
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192
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193 char *getwd ();
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194 #if !__STDC__ && !defined(STDC_HEADERS)
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195 char *getcwd (), *getenv ();
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196 #endif
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197
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70
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198 void
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199 main (argc, argv)
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200 int argc;
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201 char **argv;
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0
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202 {
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203 int s;
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204 key_t key;
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205 /* Size of text allocated in MSGP. */
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206 int size_allocated = BUFSIZ;
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207 /* Amount of text used in MSGP. */
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208 int used;
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209 struct msgbuf *msgp
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210 = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated);
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211 #if 0
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212 struct msqid_ds * msg_st;
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213 #endif /* 0 */
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214 char *homedir, buf[BUFSIZ];
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215 char gwdirb[BUFSIZ];
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216 char *cwd;
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217 char *temp;
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218 char progname[BUFSIZ];
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219
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220 strcpy (progname, argv[0]);
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221
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222 if (argc < 2)
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223 {
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224 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
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225 exit (1);
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226 }
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227
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228 /*
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229 * Create a message queue using ~/.emacs_server as the path for ftok
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230 */
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231 if ((homedir = getenv ("HOME")) == NULL)
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232 {
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233 fprintf (stderr, "%s: No home directory\n", argv[0]);
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234 exit (1);
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235 }
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236 strcpy (buf, homedir);
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237 strcat (buf, "/.emacs_server");
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238 creat (buf, 0600);
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239 key = ftok (buf, 1); /* unlikely to be anyone else using it */
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240 s = msgget (key, 0600 | IPC_CREAT);
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241 if (s == -1)
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242 {
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243 fprintf (stderr, "%s: ", argv[0]);
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244 perror ("msgget");
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245 exit (1);
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246 }
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247
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248 /* Determine working dir, so we can prefix it to all the arguments. */
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249 #ifdef BSD
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250 temp = getwd (gwdirb);
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251 #else
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252 temp = getcwd (gwdirb, sizeof gwdirb);
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253 #endif
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254
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255 cwd = gwdirb;
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256 if (temp != 0)
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257 {
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258 /* On some systems, cwd can look like `@machine/...';
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259 ignore everything before the first slash in such a case. */
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260 while (*cwd && *cwd != '/')
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261 cwd++;
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262 strcat (cwd, "/");
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263 }
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264 else
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265 {
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266 fprintf (stderr, cwd);
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267 exit (1);
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268 }
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269
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270 msgp->mtext[0] = 0;
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271 used = 0;
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272 argc--; argv++;
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273 while (argc)
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274 {
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275 int need_cwd = 0;
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276 char *modified_arg = argv[0];
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277 if (*modified_arg == '+')
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278 {
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279 char *p = modified_arg + 1;
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280 while (*p >= '0' && *p <= '9') p++;
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281 if (*p != 0)
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282 need_cwd = 1;
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283 }
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284 else if (*modified_arg != '/')
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285 need_cwd = 1;
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286
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287 if (need_cwd)
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288 used += strlen (cwd);
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289 used += strlen (modified_arg) + 1;
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290 while (used + 2 > size_allocated)
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291 {
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292 size_allocated *= 2;
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293 msgp = (struct msgbuf *) realloc (msgp,
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294 (sizeof (struct msgbuf)
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295 + size_allocated));
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296 }
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297 if (need_cwd)
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298 strcat (msgp->mtext, cwd);
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299
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300 strcat (msgp->mtext, modified_arg);
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301 strcat (msgp->mtext, " ");
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302 argv++; argc--;
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303 }
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304 strcat (msgp->mtext, "\n");
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305 #ifdef HPUX /* HPUX has a bug. */
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306 if (strlen (msgp->mtext) >= 512)
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307 {
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308 fprintf (stderr, "emacsclient: args too long for msgsnd\n");
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309 exit (1);
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310 }
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311 #endif
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312 msgp->mtype = 1;
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313 if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
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314 {
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315 fprintf (stderr, "%s: ", progname);
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316 perror ("msgsnd");
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317 exit (1);
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318 }
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319 /*
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320 * Now, wait for an answer
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321 */
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322 printf ("Waiting for Emacs...");
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323 fflush (stdout);
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324
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325 msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */
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326 strcpy (buf, msgp->mtext);
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327
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328 printf ("\n%s\n", buf);
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329 exit (0);
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330 }
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331
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332 #endif /* HAVE_SYSVIPC */
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333
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334 #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
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335
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336 #ifndef HAVE_STRERROR
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337 char *
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70
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338 strerror (errnum)
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339 int errnum;
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0
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340 {
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341 extern char *sys_errlist[];
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342 extern int sys_nerr;
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343
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344 if (errnum >= 0 && errnum < sys_nerr)
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345 return sys_errlist[errnum];
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346 return (char *) "Unknown error";
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347 }
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348
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349 #endif /* ! HAVE_STRERROR */
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