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comparison lib-src/fakemail.c @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 /* sendmail-like interface to /bin/mail for system V,
2 Copyright (C) 1985, 1994 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.28. */
22
23 #define NO_SHORTNAMES
24 #include <../src/config.h>
25
26 #if defined (BSD) && !defined (BSD4_1) && !defined (USE_FAKEMAIL)
27 /* This program is not used in BSD, so just avoid loader complaints. */
28 int
29 main (int argc, char *argv[])
30 {
31 return 0;
32 }
33 #elif defined (LINUX)
34 #include <stdio.h>
35 #include <stdlib.h>
36 int
37 main (int argc, char *argv[])
38 {
39 /* Linux /bin/mail, if it exists, is NOT the Unix v7 mail that
40 fakemail depends on! This causes garbled mail. Better to
41 output an error message. */
42 fprintf (stderr, "Sorry, fakemail does not work on Linux.\n");
43 fprintf (stderr, "Make sure you have the sendmail program, and\n");
44 fprintf (stderr, "set the Lisp variable `sendmail-program' to point\n");
45 fprintf (stderr, "to the path of the sendmail binary.\n");
46 return 1;
47 }
48 #else /* not BSD 4.2 (or newer) */
49 #ifdef MSDOS
50 int
51 main (int argc, char *argv[])
52 {
53 return 0;
54 }
55 #else /* not MSDOS */
56 /* This conditional contains all the rest of the file. */
57
58 /* These are defined in config in some versions. */
59
60 #ifdef static
61 #undef static
62 #endif
63
64 #ifdef read
65 #undef read
66 #undef write
67 #undef open
68 #undef close
69 #endif
70
71 #include <stdio.h>
72 #if __STDC__ || defined(STDC_HEADERS)
73 #include <stdlib.h>
74 #include <unistd.h>
75 #endif
76 #include <string.h>
77 #include <ctype.h>
78 #include <time.h>
79 #include <pwd.h>
80
81 /* Type definitions */
82
83 #define boolean int
84 #define true 1
85 #define false 0
86
87 /* Various lists */
88
89 struct line_record
90 {
91 char *string;
92 struct line_record *continuation;
93 };
94 typedef struct line_record *line_list;
95
96 struct header_record
97 {
98 line_list text;
99 struct header_record *next;
100 struct header_record *previous;
101 };
102 typedef struct header_record *header;
103
104 struct stream_record
105 {
106 FILE *handle;
107 int (*action)(FILE *);
108 struct stream_record *rest_streams;
109 };
110 typedef struct stream_record *stream_list;
111
112 /* A `struct linebuffer' is a structure which holds a line of text.
113 * `readline' reads a line from a stream into a linebuffer
114 * and works regardless of the length of the line.
115 */
116
117 struct linebuffer
118 {
119 long size;
120 char *buffer;
121 };
122
123 struct linebuffer lb;
124
125 #define new_list() \
126 ((line_list) xmalloc (sizeof (struct line_record)))
127 #define new_header() \
128 ((header) xmalloc (sizeof (struct header_record)))
129 #define new_stream() \
130 ((stream_list) xmalloc (sizeof (struct stream_record)))
131 #define alloc_string(nchars) \
132 ((char *) xmalloc ((nchars) + 1))
133
134 /* Global declarations */
135
136 #define BUFLEN 1024
137 #define KEYWORD_SIZE 256
138 #define FROM_PREFIX "From"
139 #define MY_NAME "fakemail"
140 #define NIL ((line_list) NULL)
141 #define INITIAL_LINE_SIZE 200
142
143 #ifndef MAIL_PROGRAM_NAME
144 #define MAIL_PROGRAM_NAME "/bin/mail"
145 #endif
146
147 static CONST char *my_name;
148 static char *the_date;
149 static char *the_user;
150 static line_list file_preface;
151 static stream_list the_streams;
152 static boolean no_problems = true;
153
154 #if !__STDC__ && !defined(STDC_HEADERS)
155 extern FILE *popen ();
156 extern int fclose (), pclose ();
157 extern char *malloc (), *realloc ();
158 #endif
159
160 #ifdef CURRENT_USER
161 extern struct passwd *getpwuid ();
162 extern unsigned short geteuid ();
163 static struct passwd *my_entry;
164 #define cuserid(s) \
165 (my_entry = getpwuid (((int) geteuid ())), \
166 my_entry->pw_name)
167 #endif
168
169 /* Utilities */
170
171 /* Print error message. `s1' is printf control string, `s2' is arg for it. */
172
173 static void
174 error (CONST char *s1, CONST char *s2)
175 {
176 printf ("%s: ", my_name);
177 printf (s1, s2);
178 printf ("\n");
179 no_problems = false;
180 }
181
182 /* Print error message and exit. */
183
184 static void
185 fatal (CONST char *s1, CONST char *s2)
186 {
187 error (s1, s2);
188 exit (1);
189 }
190
191 /* Like malloc but get fatal error if memory is exhausted. */
192
193 static char *
194 xmalloc (size_t size)
195 {
196 char *result = malloc (((unsigned) size));
197 if (result == ((char *) NULL))
198 fatal ("virtual memory exhausted", (char *) 0);
199 return result;
200 }
201
202 static char *
203 xrealloc (char *ptr, size_t size)
204 {
205 char *result = realloc (ptr, ((unsigned) size));
206 if (result == ((char *) NULL))
207 fatal ("virtual memory exhausted", (char *) 0);
208 return result;
209 }
210
211 /* Initialize a linebuffer for use */
212
213 static void
214 init_linebuffer (struct linebuffer *linebuffer)
215 {
216 linebuffer->size = INITIAL_LINE_SIZE;
217 linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE));
218 }
219
220 /* Read a line of text from `stream' into `linebuffer'.
221 * Return the length of the line.
222 */
223
224 static long
225 readline (struct linebuffer *linebuffer, FILE *stream)
226 {
227 char *buffer = linebuffer->buffer;
228 char *p = linebuffer->buffer;
229 char *end = p + linebuffer->size;
230
231 while (true)
232 {
233 int c = getc (stream);
234 if (p == end)
235 {
236 linebuffer->size *= 2;
237 buffer = ((char *) xrealloc ((char *) buffer,
238 (size_t) (linebuffer->size)));
239 p = buffer + (p - linebuffer->buffer);
240 end = buffer + linebuffer->size;
241 linebuffer->buffer = buffer;
242 }
243 if (c < 0 || c == '\n')
244 {
245 *p = 0;
246 break;
247 }
248 *p++ = c;
249 }
250
251 return p - buffer;
252 }
253
254 static char *
255 get_keyword (register char *field, char **rest)
256 {
257 static char keyword[KEYWORD_SIZE];
258 register char *ptr;
259 register char c;
260
261 ptr = &keyword[0];
262 c = *field++;
263 if ((isspace ((int) (unsigned char) c)) || (c == ':'))
264 return (char *) NULL;
265 *ptr++ = ((islower ((int) (unsigned char) c)) ?
266 (toupper ((int) (unsigned char) c)) : c);
267 while (((c = *field++) != ':') &&
268 (!(isspace ((int) (unsigned char) c))))
269 *ptr++ = ((islower ((int) (unsigned char) c)) ?
270 (toupper ((int) (unsigned char) c)) : c);
271 *ptr++ = '\0';
272 while (isspace ((int) (unsigned char) c)) c = *field++;
273 if (c != ':') return (char *) NULL;
274 *rest = field;
275 return &keyword[0];
276 }
277
278 static boolean
279 has_keyword (char *field)
280 {
281 char *ignored;
282 return (get_keyword (field, &ignored) != ((char *) NULL));
283 }
284
285 static char *
286 add_field (line_list the_list, register char *field, register char *where)
287 {
288 register char c;
289 while (true)
290 {
291 *where++ = ' ';
292 while ((c = *field++) != '\0')
293 {
294 if (c == '(')
295 {
296 while (*field && *field != ')') ++field;
297 if (! (*field++)) break; /* no closer */
298 if (! (*field)) break; /* closerNULL */
299 c = *field;
300 }
301 *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c);
302 }
303 if (the_list == NIL) break;
304 field = the_list->string;
305 the_list = the_list->continuation;
306 }
307 return where;
308 }
309
310 static line_list
311 make_file_preface (void)
312 {
313 char *the_string, *temp;
314 long idiotic_interface;
315 long prefix_length;
316 long user_length;
317 long date_length;
318 line_list result;
319
320 prefix_length = strlen (FROM_PREFIX);
321 time (&idiotic_interface);
322 the_date = ctime (&idiotic_interface);
323 /* the_date has an unwanted newline at the end */
324 date_length = strlen (the_date) - 1;
325 the_date[date_length] = '\0';
326 #ifdef WINDOWSNT
327 temp = "(null)";
328 #else
329 temp = cuserid ((char *) NULL);
330 #endif
331 user_length = strlen (temp);
332 the_user = alloc_string ((size_t) (user_length + 1));
333 strcpy (the_user, temp);
334 the_string = alloc_string ((size_t) (3 + prefix_length +
335 user_length +
336 date_length));
337 temp = the_string;
338 strcpy (temp, FROM_PREFIX);
339 temp = &temp[prefix_length];
340 *temp++ = ' ';
341 strcpy (temp, the_user);
342 temp = &temp[user_length];
343 *temp++ = ' ';
344 strcpy (temp, the_date);
345 result = new_list ();
346 result->string = the_string;
347 result->continuation = ((line_list) NULL);
348 return result;
349 }
350
351 static void
352 write_line_list (register line_list the_list, FILE *the_stream)
353 {
354 for ( ;
355 the_list != ((line_list) NULL) ;
356 the_list = the_list->continuation)
357 {
358 fputs (the_list->string, the_stream);
359 putc ('\n', the_stream);
360 }
361 return;
362 }
363
364 static int
365 close_the_streams (void)
366 {
367 register stream_list rem;
368 for (rem = the_streams;
369 rem != ((stream_list) NULL);
370 rem = rem->rest_streams)
371 no_problems = (no_problems &&
372 ((*rem->action) (rem->handle) == 0));
373 the_streams = ((stream_list) NULL);
374 return (no_problems ? 0 : 1);
375 }
376
377 static void
378 add_a_stream (FILE *the_stream, int (*closing_action)(FILE *))
379 {
380 stream_list old = the_streams;
381 the_streams = new_stream ();
382 the_streams->handle = the_stream;
383 the_streams->action = closing_action;
384 the_streams->rest_streams = old;
385 return;
386 }
387
388 static int
389 my_fclose (FILE *the_file)
390 {
391 putc ('\n', the_file);
392 fflush (the_file);
393 return fclose (the_file);
394 }
395
396 static boolean
397 open_a_file (char *name)
398 {
399 FILE *the_stream = fopen (name, "a");
400 if (the_stream != ((FILE *) NULL))
401 {
402 add_a_stream (the_stream, my_fclose);
403 if (the_user == ((char *) NULL))
404 file_preface = make_file_preface ();
405 write_line_list (file_preface, the_stream);
406 return true;
407 }
408 return false;
409 }
410
411 static void
412 put_string (char *s)
413 {
414 register stream_list rem;
415 for (rem = the_streams;
416 rem != ((stream_list) NULL);
417 rem = rem->rest_streams)
418 fputs (s, rem->handle);
419 return;
420 }
421
422 static void
423 put_line (CONST char *string)
424 {
425 register stream_list rem;
426 for (rem = the_streams;
427 rem != ((stream_list) NULL);
428 rem = rem->rest_streams)
429 {
430 CONST char *s = string;
431 int column = 0;
432
433 /* Divide STRING into lines. */
434 while (*s != 0)
435 {
436 CONST char *breakpos;
437
438 /* Find the last char that fits. */
439 for (breakpos = s; *breakpos && column < 78; ++breakpos)
440 {
441 if (*breakpos == '\t')
442 column += 8;
443 else
444 column++;
445 }
446 /* If we didn't reach end of line, break the line. */
447 if (*breakpos)
448 {
449 /* Back up to just after the last comma that fits. */
450 while (breakpos != s && breakpos[-1] != ',') --breakpos;
451
452 if (breakpos == s)
453 {
454 /* If no comma fits, move past the first address anyway. */
455 while (*breakpos != 0 && *breakpos != ',') ++breakpos;
456 if (*breakpos != 0)
457 /* Include the comma after it. */
458 ++breakpos;
459 }
460 }
461 /* Output that much, then break the line. */
462 fwrite (s, 1, breakpos - s, rem->handle);
463 column = 8;
464
465 /* Skip whitespace and prepare to print more addresses. */
466 s = breakpos;
467 while (*s == ' ' || *s == '\t') ++s;
468 if (*s != 0)
469 fputs ("\n\t", rem->handle);
470 }
471 putc ('\n', rem->handle);
472 }
473 return;
474 }
475
476 #define mail_error error
477
478 static void
479 setup_files (register line_list the_list, register char *field)
480 {
481 register char *start;
482 register char c;
483 while (true)
484 {
485 while (((c = *field) != '\0') &&
486 ((c == ' ') ||
487 (c == '\t') ||
488 (c == ',')))
489 field += 1;
490 if (c != '\0')
491 {
492 start = field;
493 while (((c = *field) != '\0') &&
494 (c != ' ') &&
495 (c != '\t') &&
496 (c != ','))
497 field += 1;
498 *field = '\0';
499 if (!open_a_file (start))
500 mail_error ("Could not open file %s", start);
501 *field = c;
502 if (c != '\0') continue;
503 }
504 if (the_list == ((line_list) NULL)) return;
505 field = the_list->string;
506 the_list = the_list->continuation;
507 }
508 }
509
510 static int
511 args_size (header the_header)
512 {
513 register header old = the_header;
514 register line_list rem;
515 register int size = 0;
516 do
517 {
518 char *field;
519 register char *keyword = get_keyword (the_header->text->string, &field);
520 if ((strcmp (keyword, "TO") == 0) ||
521 (strcmp (keyword, "CC") == 0) ||
522 (strcmp (keyword, "BCC") == 0))
523 {
524 size += 1 + strlen (field);
525 for (rem = the_header->text->continuation;
526 rem != NIL;
527 rem = rem->continuation)
528 size += 1 + strlen (rem->string);
529 }
530 the_header = the_header->next;
531 } while (the_header != old);
532 return size;
533 }
534
535 static void
536 parse_header (header the_header, register char *where)
537 {
538 register header old = the_header;
539 do
540 {
541 char *field;
542 register char *keyword = get_keyword (the_header->text->string, &field);
543 if (strcmp (keyword, "TO") == 0)
544 where = add_field (the_header->text->continuation, field, where);
545 else if (strcmp (keyword, "CC") == 0)
546 where = add_field (the_header->text->continuation, field, where);
547 else if (strcmp (keyword, "BCC") == 0)
548 {
549 where = add_field (the_header->text->continuation, field, where);
550 the_header->previous->next = the_header->next;
551 the_header->next->previous = the_header->previous;
552 }
553 else if (strcmp (keyword, "FCC") == 0)
554 setup_files (the_header->text->continuation, field);
555 the_header = the_header->next;
556 } while (the_header != old);
557 *where = '\0';
558 return;
559 }
560
561 static header
562 read_header (void)
563 {
564 register header the_header = ((header) NULL);
565 register line_list *next_line = ((line_list *) NULL);
566
567 init_linebuffer (&lb);
568
569 do
570 {
571 long length;
572 register char *line;
573
574 readline (&lb, stdin);
575 line = lb.buffer;
576 length = strlen (line);
577 if (length == 0) break;
578
579 if (has_keyword (line))
580 {
581 register header old = the_header;
582 the_header = new_header ();
583 if (old == ((header) NULL))
584 {
585 the_header->next = the_header;
586 the_header->previous = the_header;
587 }
588 else
589 {
590 the_header->previous = old;
591 the_header->next = old->next;
592 old->next = the_header;
593 }
594 next_line = &(the_header->text);
595 }
596
597 if (next_line == ((line_list *) NULL))
598 {
599 /* Not a valid header */
600 exit (1);
601 }
602 *next_line = new_list ();
603 (*next_line)->string = alloc_string ((size_t) length);
604 strcpy (((*next_line)->string), line);
605 next_line = &((*next_line)->continuation);
606 *next_line = NIL;
607
608 } while (true);
609
610 return the_header->next;
611 }
612
613 static void
614 write_header (header the_header)
615 {
616 register header old = the_header;
617 do
618 {
619 register line_list the_list;
620 for (the_list = the_header->text;
621 the_list != NIL;
622 the_list = the_list->continuation)
623 put_line (the_list->string);
624 the_header = the_header->next;
625 } while (the_header != old);
626 put_line ("");
627 return;
628 }
629
630 int
631 main (int argc, char *argv[])
632 {
633 char *command_line;
634 header the_header;
635 long name_length;
636 char *mail_program_name;
637 char buf[BUFLEN + 1];
638 register int size;
639 FILE *the_pipe;
640
641 #if !(__STDC__ || defined(STDC_HEADERS))
642 extern char *getenv ();
643 #endif
644
645 mail_program_name = getenv ("FAKEMAILER");
646 if (!(mail_program_name && *mail_program_name))
647 mail_program_name = (char *) MAIL_PROGRAM_NAME;
648 name_length = strlen (mail_program_name);
649
650 my_name = MY_NAME;
651 the_streams = ((stream_list) NULL);
652 the_date = ((char *) NULL);
653 the_user = ((char *) NULL);
654
655 the_header = read_header ();
656 command_line = alloc_string ((size_t) (name_length +
657 args_size (the_header)));
658 strcpy (command_line, mail_program_name);
659 parse_header (the_header, &command_line[name_length]);
660
661 the_pipe = popen (command_line, "w");
662 if (the_pipe == ((FILE *) NULL))
663 fatal ("cannot open pipe to real mailer", (char *) 0);
664
665 add_a_stream (the_pipe, pclose);
666
667 write_header (the_header);
668
669 /* Dump the message itself */
670
671 while (!feof (stdin))
672 {
673 size = fread (buf, 1, BUFLEN, stdin);
674 buf[size] = '\0';
675 put_string (buf);
676 }
677
678 return close_the_streams ();
679 }
680
681 #endif /* not MSDOS */
682 #endif /* not BSD 4.2 (or newer) */