Commit | Line | Data |
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6b3ee98a | 1 | /* sendmail-like interface to /bin/mail for system V, |
3a22ee35 | 2 | Copyright (C) 1985, 1994 Free Software Foundation, Inc. |
6b3ee98a RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
518dd722 JB |
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 | |
530715fe | 8 | the Free Software Foundation; either version 2, or (at your option) |
518dd722 JB |
9 | any later version. |
10 | ||
6b3ee98a | 11 | GNU Emacs is distributed in the hope that it will be useful, |
518dd722 JB |
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 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
6b3ee98a RS |
19 | |
20 | ||
21 | #define NO_SHORTNAMES | |
18160b98 | 22 | #include <../src/config.h> |
6b3ee98a RS |
23 | |
24 | #if defined (BSD) && !defined (BSD4_1) && !defined (USE_FAKEMAIL) | |
25 | /* This program isnot used in BSD, so just avoid loader complaints. */ | |
340ff9de | 26 | void |
6b3ee98a RS |
27 | main () |
28 | { | |
29 | } | |
30 | #else /* not BSD 4.2 (or newer) */ | |
26528bbc | 31 | #ifdef MSDOS |
340ff9de | 32 | void |
26528bbc RS |
33 | main () |
34 | { | |
35 | } | |
36 | #else /* not MSDOS */ | |
6b3ee98a RS |
37 | /* This conditional contains all the rest of the file. */ |
38 | ||
39 | /* These are defined in config in some versions. */ | |
40 | ||
41 | #ifdef static | |
42 | #undef static | |
43 | #endif | |
44 | ||
45 | #ifdef read | |
46 | #undef read | |
47 | #undef write | |
48 | #undef open | |
49 | #undef close | |
50 | #endif | |
51 | ||
52 | #include <stdio.h> | |
53 | #include <string.h> | |
54 | #include <ctype.h> | |
55 | #include <time.h> | |
56 | #include <pwd.h> | |
57 | \f | |
58 | /* Type definitions */ | |
59 | ||
60 | #define boolean int | |
61 | #define true 1 | |
62 | #define false 0 | |
63 | ||
64 | /* Various lists */ | |
65 | ||
66 | struct line_record | |
67 | { | |
68 | char *string; | |
69 | struct line_record *continuation; | |
70 | }; | |
71 | typedef struct line_record *line_list; | |
72 | ||
73 | struct header_record | |
74 | { | |
75 | line_list text; | |
76 | struct header_record *next; | |
77 | struct header_record *previous; | |
78 | }; | |
79 | typedef struct header_record *header; | |
80 | ||
81 | struct stream_record | |
82 | { | |
83 | FILE *handle; | |
84 | int (*action)(); | |
85 | struct stream_record *rest_streams; | |
86 | }; | |
87 | typedef struct stream_record *stream_list; | |
88 | ||
89 | /* A `struct linebuffer' is a structure which holds a line of text. | |
90 | * `readline' reads a line from a stream into a linebuffer | |
91 | * and works regardless of the length of the line. | |
92 | */ | |
93 | ||
94 | struct linebuffer | |
95 | { | |
96 | long size; | |
97 | char *buffer; | |
98 | }; | |
99 | ||
100 | struct linebuffer lb; | |
101 | ||
102 | #define new_list() \ | |
103 | ((line_list) xmalloc (sizeof (struct line_record))) | |
104 | #define new_header() \ | |
105 | ((header) xmalloc (sizeof (struct header_record))) | |
106 | #define new_stream() \ | |
107 | ((stream_list) xmalloc (sizeof (struct stream_record))) | |
108 | #define alloc_string(nchars) \ | |
109 | ((char *) xmalloc ((nchars) + 1)) | |
110 | \f | |
111 | /* Global declarations */ | |
112 | ||
113 | #define BUFLEN 1024 | |
114 | #define KEYWORD_SIZE 256 | |
115 | #define FROM_PREFIX "From" | |
116 | #define MY_NAME "fakemail" | |
117 | #define NIL ((line_list) NULL) | |
118 | #define INITIAL_LINE_SIZE 200 | |
119 | ||
120 | #ifndef MAIL_PROGRAM_NAME | |
121 | #define MAIL_PROGRAM_NAME "/bin/mail" | |
122 | #endif | |
123 | ||
124 | static char *my_name; | |
125 | static char *the_date; | |
126 | static char *the_user; | |
127 | static line_list file_preface; | |
128 | static stream_list the_streams; | |
129 | static boolean no_problems = true; | |
130 | ||
131 | extern FILE *popen (); | |
132 | extern int fclose (), pclose (); | |
133 | extern char *malloc (), *realloc (); | |
134 | ||
135 | #ifdef CURRENT_USER | |
136 | extern struct passwd *getpwuid (); | |
137 | extern unsigned short geteuid (); | |
138 | static struct passwd *my_entry; | |
139 | #define cuserid(s) \ | |
140 | (my_entry = getpwuid (((int) geteuid ())), \ | |
141 | my_entry->pw_name) | |
142 | #endif | |
143 | \f | |
144 | /* Utilities */ | |
145 | ||
146 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ | |
147 | ||
148 | static void | |
149 | error (s1, s2) | |
150 | char *s1, *s2; | |
151 | { | |
152 | printf ("%s: ", my_name); | |
153 | printf (s1, s2); | |
154 | printf ("\n"); | |
155 | no_problems = false; | |
156 | } | |
157 | ||
158 | /* Print error message and exit. */ | |
159 | ||
160 | static void | |
161 | fatal (s1, s2) | |
162 | char *s1, *s2; | |
163 | { | |
164 | error (s1, s2); | |
165 | exit (1); | |
166 | } | |
167 | ||
168 | /* Like malloc but get fatal error if memory is exhausted. */ | |
169 | ||
170 | static char * | |
171 | xmalloc (size) | |
172 | int size; | |
173 | { | |
174 | char *result = malloc (((unsigned) size)); | |
175 | if (result == ((char *) NULL)) | |
176 | fatal ("virtual memory exhausted", 0); | |
177 | return result; | |
178 | } | |
179 | ||
180 | static char * | |
181 | xrealloc (ptr, size) | |
182 | char *ptr; | |
183 | int size; | |
184 | { | |
185 | char *result = realloc (ptr, ((unsigned) size)); | |
186 | if (result == ((char *) NULL)) | |
187 | fatal ("virtual memory exhausted"); | |
188 | return result; | |
189 | } | |
190 | \f | |
191 | /* Initialize a linebuffer for use */ | |
192 | ||
193 | void | |
194 | init_linebuffer (linebuffer) | |
195 | struct linebuffer *linebuffer; | |
196 | { | |
197 | linebuffer->size = INITIAL_LINE_SIZE; | |
198 | linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE)); | |
199 | } | |
200 | ||
201 | /* Read a line of text from `stream' into `linebuffer'. | |
202 | * Return the length of the line. | |
203 | */ | |
204 | ||
205 | long | |
206 | readline (linebuffer, stream) | |
207 | struct linebuffer *linebuffer; | |
208 | FILE *stream; | |
209 | { | |
210 | char *buffer = linebuffer->buffer; | |
211 | char *p = linebuffer->buffer; | |
212 | char *end = p + linebuffer->size; | |
213 | ||
214 | while (true) | |
215 | { | |
216 | int c = getc (stream); | |
217 | if (p == end) | |
218 | { | |
219 | linebuffer->size *= 2; | |
220 | buffer = ((char *) xrealloc (buffer, linebuffer->size)); | |
f3309b68 | 221 | p = buffer + (p - linebuffer->buffer); |
1ddb6978 | 222 | end = buffer + linebuffer->size; |
6b3ee98a RS |
223 | linebuffer->buffer = buffer; |
224 | } | |
225 | if (c < 0 || c == '\n') | |
226 | { | |
227 | *p = 0; | |
228 | break; | |
229 | } | |
230 | *p++ = c; | |
231 | } | |
232 | ||
233 | return p - buffer; | |
234 | } | |
235 | \f | |
236 | char * | |
237 | get_keyword (field, rest) | |
238 | register char *field; | |
239 | char **rest; | |
240 | { | |
241 | static char keyword[KEYWORD_SIZE]; | |
242 | register char *ptr; | |
243 | register char c; | |
244 | ||
245 | ptr = &keyword[0]; | |
246 | c = *field++; | |
247 | if ((isspace (c)) || (c == ':')) | |
248 | return ((char *) NULL); | |
249 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
250 | while (((c = *field++) != ':') && (!(isspace (c)))) | |
251 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
252 | *ptr++ = '\0'; | |
253 | while (isspace (c)) c = *field++; | |
254 | if (c != ':') return ((char *) NULL); | |
255 | *rest = field; | |
256 | return &keyword[0]; | |
257 | } | |
258 | ||
259 | boolean | |
260 | has_keyword (field) | |
261 | char *field; | |
262 | { | |
263 | char *ignored; | |
264 | return (get_keyword (field, &ignored) != ((char *) NULL)); | |
265 | } | |
266 | ||
267 | char * | |
268 | add_field (the_list, field, where) | |
269 | line_list the_list; | |
270 | register char *field, *where; | |
271 | { | |
272 | register char c; | |
273 | while (true) | |
274 | { | |
275 | *where++ = ' '; | |
276 | while ((c = *field++) != '\0') | |
277 | { | |
278 | if (c == '(') | |
279 | { | |
280 | while (*field && *field != ')') ++field; | |
281 | if (! (*field++)) break; /* no closer */ | |
282 | if (! (*field)) break; /* closerNULL */ | |
283 | c = *field; | |
284 | } | |
285 | *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c); | |
286 | } | |
287 | if (the_list == NIL) break; | |
288 | field = the_list->string; | |
289 | the_list = the_list->continuation; | |
290 | } | |
291 | return where; | |
292 | } | |
293 | \f | |
294 | line_list | |
295 | make_file_preface () | |
296 | { | |
297 | char *the_string, *temp; | |
298 | long idiotic_interface; | |
299 | long prefix_length; | |
300 | long user_length; | |
301 | long date_length; | |
302 | line_list result; | |
303 | ||
304 | prefix_length = strlen (FROM_PREFIX); | |
305 | time (&idiotic_interface); | |
306 | the_date = ctime (&idiotic_interface); | |
307 | /* the_date has an unwanted newline at the end */ | |
308 | date_length = strlen (the_date) - 1; | |
309 | the_date[date_length] = '\0'; | |
310 | temp = cuserid ((char *) NULL); | |
311 | user_length = strlen (temp); | |
312 | the_user = alloc_string (user_length + 1); | |
313 | strcpy (the_user, temp); | |
314 | the_string = alloc_string (3 + prefix_length + | |
315 | user_length + | |
316 | date_length); | |
317 | temp = the_string; | |
318 | strcpy (temp, FROM_PREFIX); | |
319 | temp = &temp[prefix_length]; | |
320 | *temp++ = ' '; | |
321 | strcpy (temp, the_user); | |
322 | temp = &temp[user_length]; | |
323 | *temp++ = ' '; | |
324 | strcpy (temp, the_date); | |
325 | result = new_list (); | |
326 | result->string = the_string; | |
327 | result->continuation = ((line_list) NULL); | |
328 | return result; | |
329 | } | |
330 | ||
331 | void | |
332 | write_line_list (the_list, the_stream) | |
333 | register line_list the_list; | |
334 | FILE *the_stream; | |
335 | { | |
336 | for ( ; | |
337 | the_list != ((line_list) NULL) ; | |
338 | the_list = the_list->continuation) | |
339 | { | |
340 | fputs (the_list->string, the_stream); | |
341 | putc ('\n', the_stream); | |
342 | } | |
343 | return; | |
344 | } | |
345 | \f | |
346 | int | |
347 | close_the_streams () | |
348 | { | |
349 | register stream_list rem; | |
350 | for (rem = the_streams; | |
351 | rem != ((stream_list) NULL); | |
352 | rem = rem->rest_streams) | |
353 | no_problems = (no_problems && | |
354 | ((*rem->action) (rem->handle) == 0)); | |
355 | the_streams = ((stream_list) NULL); | |
356 | return (no_problems ? 0 : 1); | |
357 | } | |
358 | ||
359 | void | |
360 | add_a_stream (the_stream, closing_action) | |
361 | FILE *the_stream; | |
362 | int (*closing_action)(); | |
363 | { | |
364 | stream_list old = the_streams; | |
365 | the_streams = new_stream (); | |
366 | the_streams->handle = the_stream; | |
367 | the_streams->action = closing_action; | |
368 | the_streams->rest_streams = old; | |
369 | return; | |
370 | } | |
371 | ||
372 | int | |
373 | my_fclose (the_file) | |
374 | FILE *the_file; | |
375 | { | |
376 | putc ('\n', the_file); | |
377 | fflush (the_file); | |
378 | return fclose (the_file); | |
379 | } | |
380 | ||
381 | boolean | |
382 | open_a_file (name) | |
383 | char *name; | |
384 | { | |
385 | FILE *the_stream = fopen (name, "a"); | |
386 | if (the_stream != ((FILE *) NULL)) | |
387 | { | |
388 | add_a_stream (the_stream, my_fclose); | |
389 | if (the_user == ((char *) NULL)) | |
390 | file_preface = make_file_preface (); | |
391 | write_line_list (file_preface, the_stream); | |
392 | return true; | |
393 | } | |
394 | return false; | |
395 | } | |
396 | ||
397 | void | |
398 | put_string (s) | |
399 | char *s; | |
400 | { | |
401 | register stream_list rem; | |
402 | for (rem = the_streams; | |
403 | rem != ((stream_list) NULL); | |
404 | rem = rem->rest_streams) | |
405 | fputs (s, rem->handle); | |
406 | return; | |
407 | } | |
408 | ||
409 | void | |
a492a5b9 RS |
410 | put_line (string) |
411 | char *string; | |
6b3ee98a RS |
412 | { |
413 | register stream_list rem; | |
414 | for (rem = the_streams; | |
415 | rem != ((stream_list) NULL); | |
416 | rem = rem->rest_streams) | |
417 | { | |
a492a5b9 RS |
418 | char *s = string; |
419 | int column = 0; | |
420 | ||
421 | /* Divide STRING into lines. */ | |
422 | while (*s != 0) | |
423 | { | |
424 | char *breakpos; | |
425 | ||
fbffe7d9 | 426 | /* Find the last char that fits. */ |
a492a5b9 RS |
427 | for (breakpos = s; *breakpos && column < 78; ++breakpos) |
428 | { | |
429 | if (*breakpos == '\t') | |
430 | column += 8; | |
431 | else | |
432 | column++; | |
433 | } | |
fbffe7d9 RS |
434 | /* If we didn't reach end of line, break the line. */ |
435 | if (*breakpos) | |
a492a5b9 | 436 | { |
fbffe7d9 RS |
437 | /* Back up to just after the last comma that fits. */ |
438 | while (breakpos != s && breakpos[-1] != ',') --breakpos; | |
439 | ||
440 | if (breakpos == s) | |
441 | { | |
442 | /* If no comma fits, move past the first address anyway. */ | |
443 | while (*breakpos != 0 && *breakpos != ',') ++breakpos; | |
444 | if (*breakpos != 0) | |
445 | /* Include the comma after it. */ | |
446 | ++breakpos; | |
447 | } | |
a492a5b9 RS |
448 | } |
449 | /* Output that much, then break the line. */ | |
450 | fwrite (s, 1, breakpos - s, rem->handle); | |
a492a5b9 RS |
451 | column = 8; |
452 | ||
453 | /* Skip whitespace and prepare to print more addresses. */ | |
454 | s = breakpos; | |
455 | while (*s == ' ' || *s == '\t') ++s; | |
c1380f31 RS |
456 | if (*s != 0) |
457 | fputs ("\n\t", rem->handle); | |
a492a5b9 | 458 | } |
6b3ee98a RS |
459 | putc ('\n', rem->handle); |
460 | } | |
461 | return; | |
462 | } | |
463 | \f | |
464 | #define mail_error error | |
465 | ||
466 | void | |
467 | setup_files (the_list, field) | |
468 | register line_list the_list; | |
469 | register char *field; | |
470 | { | |
471 | register char *start; | |
472 | register char c; | |
473 | while (true) | |
474 | { | |
475 | while (((c = *field) != '\0') && | |
476 | ((c == ' ') || | |
477 | (c == '\t') || | |
478 | (c == ','))) | |
479 | field += 1; | |
480 | if (c != '\0') | |
481 | { | |
482 | start = field; | |
483 | while (((c = *field) != '\0') && | |
484 | (c != ' ') && | |
485 | (c != '\t') && | |
486 | (c != ',')) | |
487 | field += 1; | |
488 | *field = '\0'; | |
489 | if (!open_a_file (start)) | |
490 | mail_error ("Could not open file %s", start); | |
491 | *field = c; | |
492 | if (c != '\0') continue; | |
493 | } | |
494 | if (the_list == ((line_list) NULL)) return; | |
495 | field = the_list->string; | |
496 | the_list = the_list->continuation; | |
497 | } | |
498 | } | |
499 | \f | |
500 | int | |
501 | args_size (the_header) | |
502 | header the_header; | |
503 | { | |
504 | register header old = the_header; | |
505 | register line_list rem; | |
506 | register int size = 0; | |
507 | do | |
508 | { | |
509 | char *field; | |
510 | register char *keyword = get_keyword (the_header->text->string, &field); | |
511 | if ((strcmp (keyword, "TO") == 0) || | |
512 | (strcmp (keyword, "CC") == 0) || | |
513 | (strcmp (keyword, "BCC") == 0)) | |
514 | { | |
515 | size += 1 + strlen (field); | |
516 | for (rem = the_header->text->continuation; | |
517 | rem != NIL; | |
518 | rem = rem->continuation) | |
519 | size += 1 + strlen (rem->string); | |
520 | } | |
521 | the_header = the_header->next; | |
522 | } while (the_header != old); | |
523 | return size; | |
524 | } | |
525 | ||
526 | parse_header (the_header, where) | |
527 | header the_header; | |
528 | register char *where; | |
529 | { | |
530 | register header old = the_header; | |
531 | do | |
532 | { | |
533 | char *field; | |
534 | register char *keyword = get_keyword (the_header->text->string, &field); | |
535 | if (strcmp (keyword, "TO") == 0) | |
536 | where = add_field (the_header->text->continuation, field, where); | |
537 | else if (strcmp (keyword, "CC") == 0) | |
538 | where = add_field (the_header->text->continuation, field, where); | |
539 | else if (strcmp (keyword, "BCC") == 0) | |
540 | { | |
541 | where = add_field (the_header->text->continuation, field, where); | |
542 | the_header->previous->next = the_header->next; | |
543 | the_header->next->previous = the_header->previous; | |
544 | } | |
545 | else if (strcmp (keyword, "FCC") == 0) | |
546 | setup_files (the_header->text->continuation, field); | |
547 | the_header = the_header->next; | |
548 | } while (the_header != old); | |
549 | *where = '\0'; | |
550 | return; | |
551 | } | |
552 | \f | |
553 | header | |
554 | read_header () | |
555 | { | |
556 | register header the_header = ((header) NULL); | |
557 | register line_list *next_line = ((line_list *) NULL); | |
558 | ||
559 | init_linebuffer (&lb); | |
560 | ||
561 | do | |
562 | { | |
563 | long length; | |
564 | register char *line; | |
565 | ||
566 | readline (&lb, stdin); | |
567 | line = lb.buffer; | |
568 | length = strlen (line); | |
569 | if (length == 0) break; | |
570 | ||
571 | if (has_keyword (line)) | |
572 | { | |
573 | register header old = the_header; | |
574 | the_header = new_header (); | |
575 | if (old == ((header) NULL)) | |
576 | { | |
577 | the_header->next = the_header; | |
578 | the_header->previous = the_header; | |
579 | } | |
580 | else | |
581 | { | |
582 | the_header->previous = old; | |
583 | the_header->next = old->next; | |
584 | old->next = the_header; | |
585 | } | |
586 | next_line = &(the_header->text); | |
587 | } | |
588 | ||
589 | if (next_line == ((line_list *) NULL)) | |
590 | { | |
591 | /* Not a valid header */ | |
592 | exit (1); | |
593 | } | |
594 | *next_line = new_list (); | |
595 | (*next_line)->string = alloc_string (length); | |
596 | strcpy (((*next_line)->string), line); | |
597 | next_line = &((*next_line)->continuation); | |
598 | *next_line = NIL; | |
599 | ||
600 | } while (true); | |
601 | ||
602 | return the_header->next; | |
603 | } | |
604 | \f | |
605 | void | |
606 | write_header (the_header) | |
607 | 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 | \f | |
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 | extern char *getenv (); | |
637 | ||
638 | mail_program_name = getenv ("FAKEMAILER"); | |
639 | if (!(mail_program_name && *mail_program_name)) | |
640 | mail_program_name = MAIL_PROGRAM_NAME; | |
641 | name_length = strlen (mail_program_name); | |
642 | ||
643 | my_name = MY_NAME; | |
644 | the_streams = ((stream_list) NULL); | |
645 | the_date = ((char *) NULL); | |
646 | the_user = ((char *) NULL); | |
647 | ||
648 | the_header = read_header (); | |
649 | command_line = alloc_string (name_length + args_size (the_header)); | |
650 | strcpy (command_line, mail_program_name); | |
651 | parse_header (the_header, &command_line[name_length]); | |
652 | ||
653 | the_pipe = popen (command_line, "w"); | |
654 | if (the_pipe == ((FILE *) NULL)) | |
655 | fatal ("cannot open pipe to real mailer"); | |
656 | ||
657 | add_a_stream (the_pipe, pclose); | |
658 | ||
659 | write_header (the_header); | |
660 | ||
661 | /* Dump the message itself */ | |
662 | ||
663 | while (!feof (stdin)) | |
664 | { | |
665 | size = fread (buf, 1, BUFLEN, stdin); | |
666 | buf[size] = '\0'; | |
667 | put_string (buf); | |
668 | } | |
669 | ||
670 | exit (close_the_streams ()); | |
671 | } | |
672 | ||
26528bbc | 673 | #endif /* not MSDOS */ |
6b3ee98a | 674 | #endif /* not BSD 4.2 (or newer) */ |