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6b3ee98a RS |
1 | /* sendmail-like interface to /bin/mail for system V, |
2 | Copyright (C) 1985 Free Software Foundation, Inc. | |
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 | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
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. */ | |
26 | main () | |
27 | { | |
28 | } | |
29 | #else /* not BSD 4.2 (or newer) */ | |
30 | /* This conditional contains all the rest of the file. */ | |
31 | ||
32 | /* These are defined in config in some versions. */ | |
33 | ||
34 | #ifdef static | |
35 | #undef static | |
36 | #endif | |
37 | ||
38 | #ifdef read | |
39 | #undef read | |
40 | #undef write | |
41 | #undef open | |
42 | #undef close | |
43 | #endif | |
44 | ||
45 | #include <stdio.h> | |
46 | #include <string.h> | |
47 | #include <ctype.h> | |
48 | #include <time.h> | |
49 | #include <pwd.h> | |
50 | \f | |
51 | /* Type definitions */ | |
52 | ||
53 | #define boolean int | |
54 | #define true 1 | |
55 | #define false 0 | |
56 | ||
57 | /* Various lists */ | |
58 | ||
59 | struct line_record | |
60 | { | |
61 | char *string; | |
62 | struct line_record *continuation; | |
63 | }; | |
64 | typedef struct line_record *line_list; | |
65 | ||
66 | struct header_record | |
67 | { | |
68 | line_list text; | |
69 | struct header_record *next; | |
70 | struct header_record *previous; | |
71 | }; | |
72 | typedef struct header_record *header; | |
73 | ||
74 | struct stream_record | |
75 | { | |
76 | FILE *handle; | |
77 | int (*action)(); | |
78 | struct stream_record *rest_streams; | |
79 | }; | |
80 | typedef struct stream_record *stream_list; | |
81 | ||
82 | /* A `struct linebuffer' is a structure which holds a line of text. | |
83 | * `readline' reads a line from a stream into a linebuffer | |
84 | * and works regardless of the length of the line. | |
85 | */ | |
86 | ||
87 | struct linebuffer | |
88 | { | |
89 | long size; | |
90 | char *buffer; | |
91 | }; | |
92 | ||
93 | struct linebuffer lb; | |
94 | ||
95 | #define new_list() \ | |
96 | ((line_list) xmalloc (sizeof (struct line_record))) | |
97 | #define new_header() \ | |
98 | ((header) xmalloc (sizeof (struct header_record))) | |
99 | #define new_stream() \ | |
100 | ((stream_list) xmalloc (sizeof (struct stream_record))) | |
101 | #define alloc_string(nchars) \ | |
102 | ((char *) xmalloc ((nchars) + 1)) | |
103 | \f | |
104 | /* Global declarations */ | |
105 | ||
106 | #define BUFLEN 1024 | |
107 | #define KEYWORD_SIZE 256 | |
108 | #define FROM_PREFIX "From" | |
109 | #define MY_NAME "fakemail" | |
110 | #define NIL ((line_list) NULL) | |
111 | #define INITIAL_LINE_SIZE 200 | |
112 | ||
113 | #ifndef MAIL_PROGRAM_NAME | |
114 | #define MAIL_PROGRAM_NAME "/bin/mail" | |
115 | #endif | |
116 | ||
117 | static char *my_name; | |
118 | static char *the_date; | |
119 | static char *the_user; | |
120 | static line_list file_preface; | |
121 | static stream_list the_streams; | |
122 | static boolean no_problems = true; | |
123 | ||
124 | extern FILE *popen (); | |
125 | extern int fclose (), pclose (); | |
126 | extern char *malloc (), *realloc (); | |
127 | ||
128 | #ifdef CURRENT_USER | |
129 | extern struct passwd *getpwuid (); | |
130 | extern unsigned short geteuid (); | |
131 | static struct passwd *my_entry; | |
132 | #define cuserid(s) \ | |
133 | (my_entry = getpwuid (((int) geteuid ())), \ | |
134 | my_entry->pw_name) | |
135 | #endif | |
136 | \f | |
137 | /* Utilities */ | |
138 | ||
139 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ | |
140 | ||
141 | static void | |
142 | error (s1, s2) | |
143 | char *s1, *s2; | |
144 | { | |
145 | printf ("%s: ", my_name); | |
146 | printf (s1, s2); | |
147 | printf ("\n"); | |
148 | no_problems = false; | |
149 | } | |
150 | ||
151 | /* Print error message and exit. */ | |
152 | ||
153 | static void | |
154 | fatal (s1, s2) | |
155 | char *s1, *s2; | |
156 | { | |
157 | error (s1, s2); | |
158 | exit (1); | |
159 | } | |
160 | ||
161 | /* Like malloc but get fatal error if memory is exhausted. */ | |
162 | ||
163 | static char * | |
164 | xmalloc (size) | |
165 | int size; | |
166 | { | |
167 | char *result = malloc (((unsigned) size)); | |
168 | if (result == ((char *) NULL)) | |
169 | fatal ("virtual memory exhausted", 0); | |
170 | return result; | |
171 | } | |
172 | ||
173 | static char * | |
174 | xrealloc (ptr, size) | |
175 | char *ptr; | |
176 | int size; | |
177 | { | |
178 | char *result = realloc (ptr, ((unsigned) size)); | |
179 | if (result == ((char *) NULL)) | |
180 | fatal ("virtual memory exhausted"); | |
181 | return result; | |
182 | } | |
183 | \f | |
184 | /* Initialize a linebuffer for use */ | |
185 | ||
186 | void | |
187 | init_linebuffer (linebuffer) | |
188 | struct linebuffer *linebuffer; | |
189 | { | |
190 | linebuffer->size = INITIAL_LINE_SIZE; | |
191 | linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE)); | |
192 | } | |
193 | ||
194 | /* Read a line of text from `stream' into `linebuffer'. | |
195 | * Return the length of the line. | |
196 | */ | |
197 | ||
198 | long | |
199 | readline (linebuffer, stream) | |
200 | struct linebuffer *linebuffer; | |
201 | FILE *stream; | |
202 | { | |
203 | char *buffer = linebuffer->buffer; | |
204 | char *p = linebuffer->buffer; | |
205 | char *end = p + linebuffer->size; | |
206 | ||
207 | while (true) | |
208 | { | |
209 | int c = getc (stream); | |
210 | if (p == end) | |
211 | { | |
212 | linebuffer->size *= 2; | |
213 | buffer = ((char *) xrealloc (buffer, linebuffer->size)); | |
214 | p += buffer - linebuffer->buffer; | |
215 | end += buffer - linebuffer->buffer; | |
216 | linebuffer->buffer = buffer; | |
217 | } | |
218 | if (c < 0 || c == '\n') | |
219 | { | |
220 | *p = 0; | |
221 | break; | |
222 | } | |
223 | *p++ = c; | |
224 | } | |
225 | ||
226 | return p - buffer; | |
227 | } | |
228 | \f | |
229 | char * | |
230 | get_keyword (field, rest) | |
231 | register char *field; | |
232 | char **rest; | |
233 | { | |
234 | static char keyword[KEYWORD_SIZE]; | |
235 | register char *ptr; | |
236 | register char c; | |
237 | ||
238 | ptr = &keyword[0]; | |
239 | c = *field++; | |
240 | if ((isspace (c)) || (c == ':')) | |
241 | return ((char *) NULL); | |
242 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
243 | while (((c = *field++) != ':') && (!(isspace (c)))) | |
244 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
245 | *ptr++ = '\0'; | |
246 | while (isspace (c)) c = *field++; | |
247 | if (c != ':') return ((char *) NULL); | |
248 | *rest = field; | |
249 | return &keyword[0]; | |
250 | } | |
251 | ||
252 | boolean | |
253 | has_keyword (field) | |
254 | char *field; | |
255 | { | |
256 | char *ignored; | |
257 | return (get_keyword (field, &ignored) != ((char *) NULL)); | |
258 | } | |
259 | ||
260 | char * | |
261 | add_field (the_list, field, where) | |
262 | line_list the_list; | |
263 | register char *field, *where; | |
264 | { | |
265 | register char c; | |
266 | while (true) | |
267 | { | |
268 | *where++ = ' '; | |
269 | while ((c = *field++) != '\0') | |
270 | { | |
271 | if (c == '(') | |
272 | { | |
273 | while (*field && *field != ')') ++field; | |
274 | if (! (*field++)) break; /* no closer */ | |
275 | if (! (*field)) break; /* closerNULL */ | |
276 | c = *field; | |
277 | } | |
278 | *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c); | |
279 | } | |
280 | if (the_list == NIL) break; | |
281 | field = the_list->string; | |
282 | the_list = the_list->continuation; | |
283 | } | |
284 | return where; | |
285 | } | |
286 | \f | |
287 | line_list | |
288 | make_file_preface () | |
289 | { | |
290 | char *the_string, *temp; | |
291 | long idiotic_interface; | |
292 | long prefix_length; | |
293 | long user_length; | |
294 | long date_length; | |
295 | line_list result; | |
296 | ||
297 | prefix_length = strlen (FROM_PREFIX); | |
298 | time (&idiotic_interface); | |
299 | the_date = ctime (&idiotic_interface); | |
300 | /* the_date has an unwanted newline at the end */ | |
301 | date_length = strlen (the_date) - 1; | |
302 | the_date[date_length] = '\0'; | |
303 | temp = cuserid ((char *) NULL); | |
304 | user_length = strlen (temp); | |
305 | the_user = alloc_string (user_length + 1); | |
306 | strcpy (the_user, temp); | |
307 | the_string = alloc_string (3 + prefix_length + | |
308 | user_length + | |
309 | date_length); | |
310 | temp = the_string; | |
311 | strcpy (temp, FROM_PREFIX); | |
312 | temp = &temp[prefix_length]; | |
313 | *temp++ = ' '; | |
314 | strcpy (temp, the_user); | |
315 | temp = &temp[user_length]; | |
316 | *temp++ = ' '; | |
317 | strcpy (temp, the_date); | |
318 | result = new_list (); | |
319 | result->string = the_string; | |
320 | result->continuation = ((line_list) NULL); | |
321 | return result; | |
322 | } | |
323 | ||
324 | void | |
325 | write_line_list (the_list, the_stream) | |
326 | register line_list the_list; | |
327 | FILE *the_stream; | |
328 | { | |
329 | for ( ; | |
330 | the_list != ((line_list) NULL) ; | |
331 | the_list = the_list->continuation) | |
332 | { | |
333 | fputs (the_list->string, the_stream); | |
334 | putc ('\n', the_stream); | |
335 | } | |
336 | return; | |
337 | } | |
338 | \f | |
339 | int | |
340 | close_the_streams () | |
341 | { | |
342 | register stream_list rem; | |
343 | for (rem = the_streams; | |
344 | rem != ((stream_list) NULL); | |
345 | rem = rem->rest_streams) | |
346 | no_problems = (no_problems && | |
347 | ((*rem->action) (rem->handle) == 0)); | |
348 | the_streams = ((stream_list) NULL); | |
349 | return (no_problems ? 0 : 1); | |
350 | } | |
351 | ||
352 | void | |
353 | add_a_stream (the_stream, closing_action) | |
354 | FILE *the_stream; | |
355 | int (*closing_action)(); | |
356 | { | |
357 | stream_list old = the_streams; | |
358 | the_streams = new_stream (); | |
359 | the_streams->handle = the_stream; | |
360 | the_streams->action = closing_action; | |
361 | the_streams->rest_streams = old; | |
362 | return; | |
363 | } | |
364 | ||
365 | int | |
366 | my_fclose (the_file) | |
367 | FILE *the_file; | |
368 | { | |
369 | putc ('\n', the_file); | |
370 | fflush (the_file); | |
371 | return fclose (the_file); | |
372 | } | |
373 | ||
374 | boolean | |
375 | open_a_file (name) | |
376 | char *name; | |
377 | { | |
378 | FILE *the_stream = fopen (name, "a"); | |
379 | if (the_stream != ((FILE *) NULL)) | |
380 | { | |
381 | add_a_stream (the_stream, my_fclose); | |
382 | if (the_user == ((char *) NULL)) | |
383 | file_preface = make_file_preface (); | |
384 | write_line_list (file_preface, the_stream); | |
385 | return true; | |
386 | } | |
387 | return false; | |
388 | } | |
389 | ||
390 | void | |
391 | put_string (s) | |
392 | char *s; | |
393 | { | |
394 | register stream_list rem; | |
395 | for (rem = the_streams; | |
396 | rem != ((stream_list) NULL); | |
397 | rem = rem->rest_streams) | |
398 | fputs (s, rem->handle); | |
399 | return; | |
400 | } | |
401 | ||
402 | void | |
a492a5b9 RS |
403 | put_line (string) |
404 | char *string; | |
6b3ee98a RS |
405 | { |
406 | register stream_list rem; | |
407 | for (rem = the_streams; | |
408 | rem != ((stream_list) NULL); | |
409 | rem = rem->rest_streams) | |
410 | { | |
a492a5b9 RS |
411 | char *s = string; |
412 | int column = 0; | |
413 | ||
414 | /* Divide STRING into lines. */ | |
415 | while (*s != 0) | |
416 | { | |
417 | char *breakpos; | |
418 | ||
419 | /* Find the last char that fits. */ | |
420 | for (breakpos = s; *breakpos && column < 78; ++breakpos) | |
421 | { | |
422 | if (*breakpos == '\t') | |
423 | column += 8; | |
424 | else | |
425 | column++; | |
426 | } | |
427 | /* Back up to just after the last comma that fits. */ | |
428 | while (breakpos != s && breakpos[-1] != ',') --breakpos; | |
429 | if (breakpos == s) | |
430 | { | |
431 | /* If no comma fits, move past the first address anyway. */ | |
432 | while (*breakpos != 0 && *breakpos != ',') ++breakpos; | |
433 | if (*breakpos != 0) | |
434 | /* Include the comma after it. */ | |
435 | ++breakpos; | |
436 | } | |
437 | /* Output that much, then break the line. */ | |
438 | fwrite (s, 1, breakpos - s, rem->handle); | |
a492a5b9 RS |
439 | column = 8; |
440 | ||
441 | /* Skip whitespace and prepare to print more addresses. */ | |
442 | s = breakpos; | |
443 | while (*s == ' ' || *s == '\t') ++s; | |
c1380f31 RS |
444 | if (*s != 0) |
445 | fputs ("\n\t", rem->handle); | |
a492a5b9 | 446 | } |
6b3ee98a RS |
447 | putc ('\n', rem->handle); |
448 | } | |
449 | return; | |
450 | } | |
451 | \f | |
452 | #define mail_error error | |
453 | ||
454 | void | |
455 | setup_files (the_list, field) | |
456 | register line_list the_list; | |
457 | register char *field; | |
458 | { | |
459 | register char *start; | |
460 | register char c; | |
461 | while (true) | |
462 | { | |
463 | while (((c = *field) != '\0') && | |
464 | ((c == ' ') || | |
465 | (c == '\t') || | |
466 | (c == ','))) | |
467 | field += 1; | |
468 | if (c != '\0') | |
469 | { | |
470 | start = field; | |
471 | while (((c = *field) != '\0') && | |
472 | (c != ' ') && | |
473 | (c != '\t') && | |
474 | (c != ',')) | |
475 | field += 1; | |
476 | *field = '\0'; | |
477 | if (!open_a_file (start)) | |
478 | mail_error ("Could not open file %s", start); | |
479 | *field = c; | |
480 | if (c != '\0') continue; | |
481 | } | |
482 | if (the_list == ((line_list) NULL)) return; | |
483 | field = the_list->string; | |
484 | the_list = the_list->continuation; | |
485 | } | |
486 | } | |
487 | \f | |
488 | int | |
489 | args_size (the_header) | |
490 | header the_header; | |
491 | { | |
492 | register header old = the_header; | |
493 | register line_list rem; | |
494 | register int size = 0; | |
495 | do | |
496 | { | |
497 | char *field; | |
498 | register char *keyword = get_keyword (the_header->text->string, &field); | |
499 | if ((strcmp (keyword, "TO") == 0) || | |
500 | (strcmp (keyword, "CC") == 0) || | |
501 | (strcmp (keyword, "BCC") == 0)) | |
502 | { | |
503 | size += 1 + strlen (field); | |
504 | for (rem = the_header->text->continuation; | |
505 | rem != NIL; | |
506 | rem = rem->continuation) | |
507 | size += 1 + strlen (rem->string); | |
508 | } | |
509 | the_header = the_header->next; | |
510 | } while (the_header != old); | |
511 | return size; | |
512 | } | |
513 | ||
514 | parse_header (the_header, where) | |
515 | header the_header; | |
516 | register char *where; | |
517 | { | |
518 | register header old = the_header; | |
519 | do | |
520 | { | |
521 | char *field; | |
522 | register char *keyword = get_keyword (the_header->text->string, &field); | |
523 | if (strcmp (keyword, "TO") == 0) | |
524 | where = add_field (the_header->text->continuation, field, where); | |
525 | else if (strcmp (keyword, "CC") == 0) | |
526 | where = add_field (the_header->text->continuation, field, where); | |
527 | else if (strcmp (keyword, "BCC") == 0) | |
528 | { | |
529 | where = add_field (the_header->text->continuation, field, where); | |
530 | the_header->previous->next = the_header->next; | |
531 | the_header->next->previous = the_header->previous; | |
532 | } | |
533 | else if (strcmp (keyword, "FCC") == 0) | |
534 | setup_files (the_header->text->continuation, field); | |
535 | the_header = the_header->next; | |
536 | } while (the_header != old); | |
537 | *where = '\0'; | |
538 | return; | |
539 | } | |
540 | \f | |
541 | header | |
542 | read_header () | |
543 | { | |
544 | register header the_header = ((header) NULL); | |
545 | register line_list *next_line = ((line_list *) NULL); | |
546 | ||
547 | init_linebuffer (&lb); | |
548 | ||
549 | do | |
550 | { | |
551 | long length; | |
552 | register char *line; | |
553 | ||
554 | readline (&lb, stdin); | |
555 | line = lb.buffer; | |
556 | length = strlen (line); | |
557 | if (length == 0) break; | |
558 | ||
559 | if (has_keyword (line)) | |
560 | { | |
561 | register header old = the_header; | |
562 | the_header = new_header (); | |
563 | if (old == ((header) NULL)) | |
564 | { | |
565 | the_header->next = the_header; | |
566 | the_header->previous = the_header; | |
567 | } | |
568 | else | |
569 | { | |
570 | the_header->previous = old; | |
571 | the_header->next = old->next; | |
572 | old->next = the_header; | |
573 | } | |
574 | next_line = &(the_header->text); | |
575 | } | |
576 | ||
577 | if (next_line == ((line_list *) NULL)) | |
578 | { | |
579 | /* Not a valid header */ | |
580 | exit (1); | |
581 | } | |
582 | *next_line = new_list (); | |
583 | (*next_line)->string = alloc_string (length); | |
584 | strcpy (((*next_line)->string), line); | |
585 | next_line = &((*next_line)->continuation); | |
586 | *next_line = NIL; | |
587 | ||
588 | } while (true); | |
589 | ||
590 | return the_header->next; | |
591 | } | |
592 | \f | |
593 | void | |
594 | write_header (the_header) | |
595 | header the_header; | |
596 | { | |
597 | register header old = the_header; | |
598 | do | |
599 | { | |
600 | register line_list the_list; | |
601 | for (the_list = the_header->text; | |
602 | the_list != NIL; | |
603 | the_list = the_list->continuation) | |
604 | put_line (the_list->string); | |
605 | the_header = the_header->next; | |
606 | } while (the_header != old); | |
607 | put_line (""); | |
608 | return; | |
609 | } | |
610 | \f | |
611 | void | |
612 | main (argc, argv) | |
613 | int argc; | |
614 | char **argv; | |
615 | { | |
616 | char *command_line; | |
617 | header the_header; | |
618 | long name_length; | |
619 | char *mail_program_name; | |
620 | char buf[BUFLEN + 1]; | |
621 | register int size; | |
622 | FILE *the_pipe; | |
623 | ||
624 | extern char *getenv (); | |
625 | ||
626 | mail_program_name = getenv ("FAKEMAILER"); | |
627 | if (!(mail_program_name && *mail_program_name)) | |
628 | mail_program_name = MAIL_PROGRAM_NAME; | |
629 | name_length = strlen (mail_program_name); | |
630 | ||
631 | my_name = MY_NAME; | |
632 | the_streams = ((stream_list) NULL); | |
633 | the_date = ((char *) NULL); | |
634 | the_user = ((char *) NULL); | |
635 | ||
636 | the_header = read_header (); | |
637 | command_line = alloc_string (name_length + args_size (the_header)); | |
638 | strcpy (command_line, mail_program_name); | |
639 | parse_header (the_header, &command_line[name_length]); | |
640 | ||
641 | the_pipe = popen (command_line, "w"); | |
642 | if (the_pipe == ((FILE *) NULL)) | |
643 | fatal ("cannot open pipe to real mailer"); | |
644 | ||
645 | add_a_stream (the_pipe, pclose); | |
646 | ||
647 | write_header (the_header); | |
648 | ||
649 | /* Dump the message itself */ | |
650 | ||
651 | while (!feof (stdin)) | |
652 | { | |
653 | size = fread (buf, 1, BUFLEN, stdin); | |
654 | buf[size] = '\0'; | |
655 | put_string (buf); | |
656 | } | |
657 | ||
658 | exit (close_the_streams ()); | |
659 | } | |
660 | ||
661 | #endif /* not BSD 4.2 (or newer) */ |