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0
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1 /* sendmail-like interface to /bin/mail for system V,
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2 Copyright (C) 1985, 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
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26 #if defined (BSD) && !defined (BSD4_1) && !defined (USE_FAKEMAIL)
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27 /* This program isnot used in BSD, so just avoid loader complaints. */
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28 void
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29 main ()
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30 {
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31 }
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32 #elif defined (LINUX)
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33 #include <stdio.h>
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34 #include <stdlib.h>
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35 void
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36 main ()
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37 {
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38 /* Linux /bin/mail, if it exists, is NOT the Unix v7 mail that
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39 fakemail depends on! This causes garbled mail. Better to
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40 output an error message. */
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41 fprintf (stderr, "Sorry, fakemail does not work on Linux.\n");
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42 fprintf (stderr, "Make sure you have the sendmail program, and\n");
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43 fprintf (stderr, "set the Lisp variable `sendmail-program' to point\n");
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44 fprintf (stderr, "to the path of the sendmail binary.\n");
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45 exit (1);
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46 }
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47 #else /* not BSD 4.2 (or newer) */
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48 #ifdef MSDOS
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49 main ()
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50 {
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51 }
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52 #else /* not MSDOS */
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53 /* This conditional contains all the rest of the file. */
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54
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55 /* These are defined in config in some versions. */
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56
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57 #ifdef static
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58 #undef static
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59 #endif
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60
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61 #ifdef read
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62 #undef read
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63 #undef write
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64 #undef open
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65 #undef close
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66 #endif
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67
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68 #include <stdio.h>
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69 #if __STDC__ || defined(STDC_HEADERS)
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70 #include <stdlib.h>
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71 #include <unistd.h>
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72 #endif
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73 #include <string.h>
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74 #include <ctype.h>
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75 #include <time.h>
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76 #include <pwd.h>
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77
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78 /* Type definitions */
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79
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80 #define boolean int
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81 #define true 1
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82 #define false 0
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83
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84 /* Various lists */
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85
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86 struct line_record
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87 {
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88 char *string;
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89 struct line_record *continuation;
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90 };
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91 typedef struct line_record *line_list;
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92
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93 struct header_record
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94 {
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95 line_list text;
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96 struct header_record *next;
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97 struct header_record *previous;
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98 };
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99 typedef struct header_record *header;
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100
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101 struct stream_record
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102 {
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103 FILE *handle;
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104 int (*action)();
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105 struct stream_record *rest_streams;
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106 };
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107 typedef struct stream_record *stream_list;
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108
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109 /* A `struct linebuffer' is a structure which holds a line of text.
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110 * `readline' reads a line from a stream into a linebuffer
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111 * and works regardless of the length of the line.
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112 */
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113
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114 struct linebuffer
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115 {
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116 long size;
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117 char *buffer;
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118 };
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119
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120 struct linebuffer lb;
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121
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122 #define new_list() \
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123 ((line_list) xmalloc (sizeof (struct line_record)))
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124 #define new_header() \
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125 ((header) xmalloc (sizeof (struct header_record)))
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126 #define new_stream() \
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127 ((stream_list) xmalloc (sizeof (struct stream_record)))
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128 #define alloc_string(nchars) \
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129 ((char *) xmalloc ((nchars) + 1))
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130
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131 /* Global declarations */
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132
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133 #define BUFLEN 1024
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134 #define KEYWORD_SIZE 256
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135 #define FROM_PREFIX "From"
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136 #define MY_NAME "fakemail"
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137 #define NIL ((line_list) NULL)
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138 #define INITIAL_LINE_SIZE 200
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139
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140 #ifndef MAIL_PROGRAM_NAME
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141 #define MAIL_PROGRAM_NAME "/bin/mail"
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142 #endif
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143
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144 static CONST char *my_name;
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145 static char *the_date;
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146 static char *the_user;
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147 static line_list file_preface;
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148 static stream_list the_streams;
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149 static boolean no_problems = true;
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150
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151 #if !__STDC__ && !defined(STDC_HEADERS)
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152 extern FILE *popen ();
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153 extern int fclose (), pclose ();
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154 extern char *malloc (), *realloc ();
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155 #endif
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156
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157 #ifdef CURRENT_USER
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158 extern struct passwd *getpwuid ();
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159 extern unsigned short geteuid ();
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160 static struct passwd *my_entry;
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161 #define cuserid(s) \
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162 (my_entry = getpwuid (((int) geteuid ())), \
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163 my_entry->pw_name)
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164 #endif
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165
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166 /* Utilities */
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167
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168 /* Print error message. `s1' is printf control string, `s2' is arg for it. */
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169
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170 static void
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171 error (CONST char *s1, CONST char *s2)
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172 {
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173 printf ("%s: ", my_name);
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174 printf (s1, s2);
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175 printf ("\n");
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176 no_problems = false;
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177 }
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178
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179 /* Print error message and exit. */
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180
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181 static void
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182 fatal (CONST char *s1, CONST char *s2)
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183 {
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184 error (s1, s2);
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185 exit (1);
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186 }
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187
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188 /* Like malloc but get fatal error if memory is exhausted. */
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189
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190 static char *
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191 xmalloc (size)
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192 size_t size;
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193 {
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194 char *result = malloc (((unsigned) size));
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195 if (result == ((char *) NULL))
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196 fatal ("virtual memory exhausted", (char *) 0);
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197 return result;
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198 }
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199
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200 static char *
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201 xrealloc (ptr, size)
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202 char *ptr;
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203 size_t size;
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204 {
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205 char *result = realloc (ptr, ((unsigned) size));
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206 if (result == ((char *) NULL))
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207 fatal ("virtual memory exhausted", (char *) 0);
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208 return result;
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209 }
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210
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211 /* Initialize a linebuffer for use */
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212
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213 static void
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214 init_linebuffer (struct linebuffer *linebuffer)
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215 {
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216 linebuffer->size = INITIAL_LINE_SIZE;
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217 linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE));
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218 }
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219
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220 /* Read a line of text from `stream' into `linebuffer'.
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221 * Return the length of the line.
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222 */
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223
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224 static long
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225 readline (struct linebuffer *linebuffer, FILE *stream)
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226 {
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227 char *buffer = linebuffer->buffer;
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228 char *p = linebuffer->buffer;
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229 char *end = p + linebuffer->size;
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230
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231 while (true)
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232 {
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233 int c = getc (stream);
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234 if (p == end)
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235 {
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236 linebuffer->size *= 2;
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237 buffer = ((char *) xrealloc ((char *) buffer,
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238 (size_t) (linebuffer->size)));
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239 p = buffer + (p - linebuffer->buffer);
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240 end = buffer + linebuffer->size;
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241 linebuffer->buffer = buffer;
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242 }
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243 if (c < 0 || c == '\n')
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244 {
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245 *p = 0;
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246 break;
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247 }
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248 *p++ = c;
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249 }
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250
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251 return p - buffer;
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252 }
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253
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254 static char *
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255 get_keyword (register char *field, char **rest)
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256 {
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257 static char keyword[KEYWORD_SIZE];
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258 register char *ptr;
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259 register char c;
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260
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261 ptr = &keyword[0];
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262 c = *field++;
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263 if ((isspace (c)) || (c == ':'))
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264 return ((char *) NULL);
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265 *ptr++ = ((islower (c)) ? (toupper (c)) : c);
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266 while (((c = *field++) != ':') && (!(isspace (c))))
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267 *ptr++ = ((islower (c)) ? (toupper (c)) : c);
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268 *ptr++ = '\0';
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269 while (isspace (c)) c = *field++;
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270 if (c != ':') return ((char *) NULL);
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271 *rest = field;
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272 return &keyword[0];
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273 }
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274
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275 static boolean
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276 has_keyword (char *field)
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277 {
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278 char *ignored;
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279 return (get_keyword (field, &ignored) != ((char *) NULL));
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280 }
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281
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282 static char *
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283 add_field (line_list the_list, register char *field, register char *where)
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284 {
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285 register char c;
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286 while (true)
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287 {
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288 *where++ = ' ';
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289 while ((c = *field++) != '\0')
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290 {
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291 if (c == '(')
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292 {
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293 while (*field && *field != ')') ++field;
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294 if (! (*field++)) break; /* no closer */
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295 if (! (*field)) break; /* closerNULL */
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296 c = *field;
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297 }
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298 *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c);
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299 }
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300 if (the_list == NIL) break;
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301 field = the_list->string;
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302 the_list = the_list->continuation;
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303 }
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304 return where;
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305 }
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306
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307 static line_list
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308 make_file_preface (void)
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309 {
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310 char *the_string, *temp;
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311 long idiotic_interface;
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312 long prefix_length;
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313 long user_length;
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314 long date_length;
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315 line_list result;
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316
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317 prefix_length = strlen (FROM_PREFIX);
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318 time (&idiotic_interface);
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319 the_date = ctime (&idiotic_interface);
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320 /* the_date has an unwanted newline at the end */
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321 date_length = strlen (the_date) - 1;
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322 the_date[date_length] = '\0';
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323 temp = cuserid ((char *) NULL);
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324 user_length = strlen (temp);
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325 the_user = alloc_string ((size_t) (user_length + 1));
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326 strcpy (the_user, temp);
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327 the_string = alloc_string ((size_t) (3 + prefix_length +
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328 user_length +
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329 date_length));
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330 temp = the_string;
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331 strcpy (temp, FROM_PREFIX);
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332 temp = &temp[prefix_length];
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333 *temp++ = ' ';
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334 strcpy (temp, the_user);
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335 temp = &temp[user_length];
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336 *temp++ = ' ';
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337 strcpy (temp, the_date);
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338 result = new_list ();
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339 result->string = the_string;
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340 result->continuation = ((line_list) NULL);
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341 return result;
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342 }
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343
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344 static void
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345 write_line_list (register line_list the_list, FILE *the_stream)
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346 {
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347 for ( ;
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348 the_list != ((line_list) NULL) ;
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349 the_list = the_list->continuation)
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350 {
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351 fputs (the_list->string, the_stream);
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352 putc ('\n', the_stream);
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353 }
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354 return;
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355 }
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356
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357 static int
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358 close_the_streams (void)
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359 {
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360 register stream_list rem;
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361 for (rem = the_streams;
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362 rem != ((stream_list) NULL);
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363 rem = rem->rest_streams)
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364 no_problems = (no_problems &&
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365 ((*rem->action) (rem->handle) == 0));
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366 the_streams = ((stream_list) NULL);
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367 return (no_problems ? 0 : 1);
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368 }
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369
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370 static void
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371 add_a_stream (FILE *the_stream, int (*closing_action)())
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372 {
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373 stream_list old = the_streams;
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374 the_streams = new_stream ();
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375 the_streams->handle = the_stream;
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376 the_streams->action = closing_action;
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377 the_streams->rest_streams = old;
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378 return;
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379 }
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380
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381 static int
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382 my_fclose (FILE *the_file)
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383 {
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384 putc ('\n', the_file);
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385 fflush (the_file);
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386 return fclose (the_file);
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387 }
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388
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389 static boolean
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390 open_a_file (char *name)
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391 {
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392 FILE *the_stream = fopen (name, "a");
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393 if (the_stream != ((FILE *) NULL))
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394 {
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395 add_a_stream (the_stream, my_fclose);
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396 if (the_user == ((char *) NULL))
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397 file_preface = make_file_preface ();
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398 write_line_list (file_preface, the_stream);
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399 return true;
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400 }
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401 return false;
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402 }
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403
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404 static void
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405 put_string (char *s)
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406 {
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407 register stream_list rem;
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408 for (rem = the_streams;
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409 rem != ((stream_list) NULL);
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410 rem = rem->rest_streams)
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411 fputs (s, rem->handle);
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412 return;
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413 }
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414
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415 static void
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416 put_line (CONST char *string)
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417 {
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418 register stream_list rem;
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419 for (rem = the_streams;
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420 rem != ((stream_list) NULL);
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421 rem = rem->rest_streams)
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422 {
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423 CONST char *s = string;
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424 int column = 0;
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425
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426 /* Divide STRING into lines. */
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427 while (*s != 0)
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428 {
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429 CONST char *breakpos;
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430
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431 /* Find the last char that fits. */
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432 for (breakpos = s; *breakpos && column < 78; ++breakpos)
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433 {
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434 if (*breakpos == '\t')
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435 column += 8;
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436 else
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437 column++;
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438 }
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439 /* If we didn't reach end of line, break the line. */
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440 if (*breakpos)
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441 {
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442 /* Back up to just after the last comma that fits. */
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443 while (breakpos != s && breakpos[-1] != ',') --breakpos;
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444
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445 if (breakpos == s)
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446 {
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447 /* If no comma fits, move past the first address anyway. */
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|
|
448 while (*breakpos != 0 && *breakpos != ',') ++breakpos;
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449 if (*breakpos != 0)
|
|
|
450 /* Include the comma after it. */
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|
451 ++breakpos;
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|
|
452 }
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|
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453 }
|
|
|
454 /* Output that much, then break the line. */
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|
|
455 fwrite (s, 1, breakpos - s, rem->handle);
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|
|
456 column = 8;
|
|
|
457
|
|
|
458 /* Skip whitespace and prepare to print more addresses. */
|
|
|
459 s = breakpos;
|
|
|
460 while (*s == ' ' || *s == '\t') ++s;
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|
|
461 if (*s != 0)
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|
462 fputs ("\n\t", rem->handle);
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463 }
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|
|
464 putc ('\n', rem->handle);
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|
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465 }
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466 return;
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|
467 }
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|
|
468
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|
|
469 #define mail_error error
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|
|
470
|
|
|
471 static void
|
|
|
472 setup_files (register line_list the_list, register char *field)
|
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473 {
|
|
|
474 register char *start;
|
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|
475 register char c;
|
|
|
476 while (true)
|
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477 {
|
|
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478 while (((c = *field) != '\0') &&
|
|
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479 ((c == ' ') ||
|
|
|
480 (c == '\t') ||
|
|
|
481 (c == ',')))
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|
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482 field += 1;
|
|
|
483 if (c != '\0')
|
|
|
484 {
|
|
|
485 start = field;
|
|
|
486 while (((c = *field) != '\0') &&
|
|
|
487 (c != ' ') &&
|
|
|
488 (c != '\t') &&
|
|
|
489 (c != ','))
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|
|
490 field += 1;
|
|
|
491 *field = '\0';
|
|
|
492 if (!open_a_file (start))
|
|
|
493 mail_error ("Could not open file %s", start);
|
|
|
494 *field = c;
|
|
|
495 if (c != '\0') continue;
|
|
|
496 }
|
|
|
497 if (the_list == ((line_list) NULL)) return;
|
|
|
498 field = the_list->string;
|
|
|
499 the_list = the_list->continuation;
|
|
|
500 }
|
|
|
501 }
|
|
|
502
|
|
|
503 static int
|
|
|
504 args_size (header the_header)
|
|
|
505 {
|
|
|
506 register header old = the_header;
|
|
|
507 register line_list rem;
|
|
|
508 register int size = 0;
|
|
|
509 do
|
|
|
510 {
|
|
|
511 char *field;
|
|
|
512 register char *keyword = get_keyword (the_header->text->string, &field);
|
|
|
513 if ((strcmp (keyword, "TO") == 0) ||
|
|
|
514 (strcmp (keyword, "CC") == 0) ||
|
|
|
515 (strcmp (keyword, "BCC") == 0))
|
|
|
516 {
|
|
|
517 size += 1 + strlen (field);
|
|
|
518 for (rem = the_header->text->continuation;
|
|
|
519 rem != NIL;
|
|
|
520 rem = rem->continuation)
|
|
|
521 size += 1 + strlen (rem->string);
|
|
|
522 }
|
|
|
523 the_header = the_header->next;
|
|
|
524 } while (the_header != old);
|
|
|
525 return size;
|
|
|
526 }
|
|
|
527
|
|
|
528 static void
|
|
|
529 parse_header (header the_header, register char *where)
|
|
|
530 {
|
|
|
531 register header old = the_header;
|
|
|
532 do
|
|
|
533 {
|
|
|
534 char *field;
|
|
|
535 register char *keyword = get_keyword (the_header->text->string, &field);
|
|
|
536 if (strcmp (keyword, "TO") == 0)
|
|
|
537 where = add_field (the_header->text->continuation, field, where);
|
|
|
538 else if (strcmp (keyword, "CC") == 0)
|
|
|
539 where = add_field (the_header->text->continuation, field, where);
|
|
|
540 else if (strcmp (keyword, "BCC") == 0)
|
|
|
541 {
|
|
|
542 where = add_field (the_header->text->continuation, field, where);
|
|
|
543 the_header->previous->next = the_header->next;
|
|
|
544 the_header->next->previous = the_header->previous;
|
|
|
545 }
|
|
|
546 else if (strcmp (keyword, "FCC") == 0)
|
|
|
547 setup_files (the_header->text->continuation, field);
|
|
|
548 the_header = the_header->next;
|
|
|
549 } while (the_header != old);
|
|
|
550 *where = '\0';
|
|
|
551 return;
|
|
|
552 }
|
|
|
553
|
|
|
554 static header
|
|
|
555 read_header (void)
|
|
|
556 {
|
|
|
557 register header the_header = ((header) NULL);
|
|
|
558 register line_list *next_line = ((line_list *) NULL);
|
|
|
559
|
|
|
560 init_linebuffer (&lb);
|
|
|
561
|
|
|
562 do
|
|
|
563 {
|
|
|
564 long length;
|
|
|
565 register char *line;
|
|
|
566
|
|
|
567 readline (&lb, stdin);
|
|
|
568 line = lb.buffer;
|
|
|
569 length = strlen (line);
|
|
|
570 if (length == 0) break;
|
|
|
571
|
|
|
572 if (has_keyword (line))
|
|
|
573 {
|
|
|
574 register header old = the_header;
|
|
|
575 the_header = new_header ();
|
|
|
576 if (old == ((header) NULL))
|
|
|
577 {
|
|
|
578 the_header->next = the_header;
|
|
|
579 the_header->previous = the_header;
|
|
|
580 }
|
|
|
581 else
|
|
|
582 {
|
|
|
583 the_header->previous = old;
|
|
|
584 the_header->next = old->next;
|
|
|
585 old->next = the_header;
|
|
|
586 }
|
|
|
587 next_line = &(the_header->text);
|
|
|
588 }
|
|
|
589
|
|
|
590 if (next_line == ((line_list *) NULL))
|
|
|
591 {
|
|
|
592 /* Not a valid header */
|
|
|
593 exit (1);
|
|
|
594 }
|
|
|
595 *next_line = new_list ();
|
|
|
596 (*next_line)->string = alloc_string ((size_t) length);
|
|
|
597 strcpy (((*next_line)->string), line);
|
|
|
598 next_line = &((*next_line)->continuation);
|
|
|
599 *next_line = NIL;
|
|
|
600
|
|
|
601 } while (true);
|
|
|
602
|
|
|
603 return the_header->next;
|
|
|
604 }
|
|
|
605
|
|
|
606 static void
|
|
|
607 write_header (header the_header)
|
|
|
608 {
|
|
|
609 register header old = the_header;
|
|
|
610 do
|
|
|
611 {
|
|
|
612 register line_list the_list;
|
|
|
613 for (the_list = the_header->text;
|
|
|
614 the_list != NIL;
|
|
|
615 the_list = the_list->continuation)
|
|
|
616 put_line (the_list->string);
|
|
|
617 the_header = the_header->next;
|
|
|
618 } while (the_header != old);
|
|
|
619 put_line ("");
|
|
|
620 return;
|
|
|
621 }
|
|
|
622
|
|
|
623 void
|
|
|
624 main (argc, argv)
|
|
|
625 int argc;
|
|
|
626 char **argv;
|
|
|
627 {
|
|
|
628 char *command_line;
|
|
|
629 header the_header;
|
|
|
630 long name_length;
|
|
|
631 char *mail_program_name;
|
|
|
632 char buf[BUFLEN + 1];
|
|
|
633 register int size;
|
|
|
634 FILE *the_pipe;
|
|
|
635
|
|
|
636 #if !(__STDC__ || defined(STDC_HEADERS))
|
|
|
637 extern char *getenv ();
|
|
|
638 #endif
|
|
|
639
|
|
|
640 mail_program_name = getenv ("FAKEMAILER");
|
|
|
641 if (!(mail_program_name && *mail_program_name))
|
|
|
642 mail_program_name = (char *) MAIL_PROGRAM_NAME;
|
|
|
643 name_length = strlen (mail_program_name);
|
|
|
644
|
|
|
645 my_name = MY_NAME;
|
|
|
646 the_streams = ((stream_list) NULL);
|
|
|
647 the_date = ((char *) NULL);
|
|
|
648 the_user = ((char *) NULL);
|
|
|
649
|
|
|
650 the_header = read_header ();
|
|
|
651 command_line = alloc_string ((size_t) (name_length +
|
|
|
652 args_size (the_header)));
|
|
|
653 strcpy (command_line, mail_program_name);
|
|
|
654 parse_header (the_header, &command_line[name_length]);
|
|
|
655
|
|
|
656 the_pipe = popen (command_line, "w");
|
|
|
657 if (the_pipe == ((FILE *) NULL))
|
|
|
658 fatal ("cannot open pipe to real mailer", (char *) 0);
|
|
|
659
|
|
|
660 add_a_stream (the_pipe, pclose);
|
|
|
661
|
|
|
662 write_header (the_header);
|
|
|
663
|
|
|
664 /* Dump the message itself */
|
|
|
665
|
|
|
666 while (!feof (stdin))
|
|
|
667 {
|
|
|
668 size = fread (buf, 1, BUFLEN, stdin);
|
|
|
669 buf[size] = '\0';
|
|
|
670 put_string (buf);
|
|
|
671 }
|
|
|
672
|
|
|
673 exit (close_the_streams ());
|
|
|
674 }
|
|
|
675
|
|
|
676 #endif /* not MSDOS */
|
|
|
677 #endif /* not BSD 4.2 (or newer) */
|
