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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) */ | |
26528bbc RS |
30 | #ifdef MSDOS |
31 | main () | |
32 | { | |
33 | } | |
34 | #else /* not MSDOS */ | |
6b3ee98a RS |
35 | /* This conditional contains all the rest of the file. */ |
36 | ||
37 | /* These are defined in config in some versions. */ | |
38 | ||
39 | #ifdef static | |
40 | #undef static | |
41 | #endif | |
42 | ||
43 | #ifdef read | |
44 | #undef read | |
45 | #undef write | |
46 | #undef open | |
47 | #undef close | |
48 | #endif | |
49 | ||
50 | #include <stdio.h> | |
51 | #include <string.h> | |
52 | #include <ctype.h> | |
53 | #include <time.h> | |
54 | #include <pwd.h> | |
55 | \f | |
56 | /* Type definitions */ | |
57 | ||
58 | #define boolean int | |
59 | #define true 1 | |
60 | #define false 0 | |
61 | ||
62 | /* Various lists */ | |
63 | ||
64 | struct line_record | |
65 | { | |
66 | char *string; | |
67 | struct line_record *continuation; | |
68 | }; | |
69 | typedef struct line_record *line_list; | |
70 | ||
71 | struct header_record | |
72 | { | |
73 | line_list text; | |
74 | struct header_record *next; | |
75 | struct header_record *previous; | |
76 | }; | |
77 | typedef struct header_record *header; | |
78 | ||
79 | struct stream_record | |
80 | { | |
81 | FILE *handle; | |
82 | int (*action)(); | |
83 | struct stream_record *rest_streams; | |
84 | }; | |
85 | typedef struct stream_record *stream_list; | |
86 | ||
87 | /* A `struct linebuffer' is a structure which holds a line of text. | |
88 | * `readline' reads a line from a stream into a linebuffer | |
89 | * and works regardless of the length of the line. | |
90 | */ | |
91 | ||
92 | struct linebuffer | |
93 | { | |
94 | long size; | |
95 | char *buffer; | |
96 | }; | |
97 | ||
98 | struct linebuffer lb; | |
99 | ||
100 | #define new_list() \ | |
101 | ((line_list) xmalloc (sizeof (struct line_record))) | |
102 | #define new_header() \ | |
103 | ((header) xmalloc (sizeof (struct header_record))) | |
104 | #define new_stream() \ | |
105 | ((stream_list) xmalloc (sizeof (struct stream_record))) | |
106 | #define alloc_string(nchars) \ | |
107 | ((char *) xmalloc ((nchars) + 1)) | |
108 | \f | |
109 | /* Global declarations */ | |
110 | ||
111 | #define BUFLEN 1024 | |
112 | #define KEYWORD_SIZE 256 | |
113 | #define FROM_PREFIX "From" | |
114 | #define MY_NAME "fakemail" | |
115 | #define NIL ((line_list) NULL) | |
116 | #define INITIAL_LINE_SIZE 200 | |
117 | ||
118 | #ifndef MAIL_PROGRAM_NAME | |
119 | #define MAIL_PROGRAM_NAME "/bin/mail" | |
120 | #endif | |
121 | ||
122 | static char *my_name; | |
123 | static char *the_date; | |
124 | static char *the_user; | |
125 | static line_list file_preface; | |
126 | static stream_list the_streams; | |
127 | static boolean no_problems = true; | |
128 | ||
129 | extern FILE *popen (); | |
130 | extern int fclose (), pclose (); | |
131 | extern char *malloc (), *realloc (); | |
132 | ||
133 | #ifdef CURRENT_USER | |
134 | extern struct passwd *getpwuid (); | |
135 | extern unsigned short geteuid (); | |
136 | static struct passwd *my_entry; | |
137 | #define cuserid(s) \ | |
138 | (my_entry = getpwuid (((int) geteuid ())), \ | |
139 | my_entry->pw_name) | |
140 | #endif | |
141 | \f | |
142 | /* Utilities */ | |
143 | ||
144 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ | |
145 | ||
146 | static void | |
147 | error (s1, s2) | |
148 | char *s1, *s2; | |
149 | { | |
150 | printf ("%s: ", my_name); | |
151 | printf (s1, s2); | |
152 | printf ("\n"); | |
153 | no_problems = false; | |
154 | } | |
155 | ||
156 | /* Print error message and exit. */ | |
157 | ||
158 | static void | |
159 | fatal (s1, s2) | |
160 | char *s1, *s2; | |
161 | { | |
162 | error (s1, s2); | |
163 | exit (1); | |
164 | } | |
165 | ||
166 | /* Like malloc but get fatal error if memory is exhausted. */ | |
167 | ||
168 | static char * | |
169 | xmalloc (size) | |
170 | int size; | |
171 | { | |
172 | char *result = malloc (((unsigned) size)); | |
173 | if (result == ((char *) NULL)) | |
174 | fatal ("virtual memory exhausted", 0); | |
175 | return result; | |
176 | } | |
177 | ||
178 | static char * | |
179 | xrealloc (ptr, size) | |
180 | char *ptr; | |
181 | int size; | |
182 | { | |
183 | char *result = realloc (ptr, ((unsigned) size)); | |
184 | if (result == ((char *) NULL)) | |
185 | fatal ("virtual memory exhausted"); | |
186 | return result; | |
187 | } | |
188 | \f | |
189 | /* Initialize a linebuffer for use */ | |
190 | ||
191 | void | |
192 | init_linebuffer (linebuffer) | |
193 | struct linebuffer *linebuffer; | |
194 | { | |
195 | linebuffer->size = INITIAL_LINE_SIZE; | |
196 | linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE)); | |
197 | } | |
198 | ||
199 | /* Read a line of text from `stream' into `linebuffer'. | |
200 | * Return the length of the line. | |
201 | */ | |
202 | ||
203 | long | |
204 | readline (linebuffer, stream) | |
205 | struct linebuffer *linebuffer; | |
206 | FILE *stream; | |
207 | { | |
208 | char *buffer = linebuffer->buffer; | |
209 | char *p = linebuffer->buffer; | |
210 | char *end = p + linebuffer->size; | |
211 | ||
212 | while (true) | |
213 | { | |
214 | int c = getc (stream); | |
215 | if (p == end) | |
216 | { | |
217 | linebuffer->size *= 2; | |
218 | buffer = ((char *) xrealloc (buffer, linebuffer->size)); | |
219 | p += buffer - linebuffer->buffer; | |
220 | end += buffer - linebuffer->buffer; | |
221 | linebuffer->buffer = buffer; | |
222 | } | |
223 | if (c < 0 || c == '\n') | |
224 | { | |
225 | *p = 0; | |
226 | break; | |
227 | } | |
228 | *p++ = c; | |
229 | } | |
230 | ||
231 | return p - buffer; | |
232 | } | |
233 | \f | |
234 | char * | |
235 | get_keyword (field, rest) | |
236 | register char *field; | |
237 | char **rest; | |
238 | { | |
239 | static char keyword[KEYWORD_SIZE]; | |
240 | register char *ptr; | |
241 | register char c; | |
242 | ||
243 | ptr = &keyword[0]; | |
244 | c = *field++; | |
245 | if ((isspace (c)) || (c == ':')) | |
246 | return ((char *) NULL); | |
247 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
248 | while (((c = *field++) != ':') && (!(isspace (c)))) | |
249 | *ptr++ = ((islower (c)) ? (toupper (c)) : c); | |
250 | *ptr++ = '\0'; | |
251 | while (isspace (c)) c = *field++; | |
252 | if (c != ':') return ((char *) NULL); | |
253 | *rest = field; | |
254 | return &keyword[0]; | |
255 | } | |
256 | ||
257 | boolean | |
258 | has_keyword (field) | |
259 | char *field; | |
260 | { | |
261 | char *ignored; | |
262 | return (get_keyword (field, &ignored) != ((char *) NULL)); | |
263 | } | |
264 | ||
265 | char * | |
266 | add_field (the_list, field, where) | |
267 | line_list the_list; | |
268 | register char *field, *where; | |
269 | { | |
270 | register char c; | |
271 | while (true) | |
272 | { | |
273 | *where++ = ' '; | |
274 | while ((c = *field++) != '\0') | |
275 | { | |
276 | if (c == '(') | |
277 | { | |
278 | while (*field && *field != ')') ++field; | |
279 | if (! (*field++)) break; /* no closer */ | |
280 | if (! (*field)) break; /* closerNULL */ | |
281 | c = *field; | |
282 | } | |
283 | *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c); | |
284 | } | |
285 | if (the_list == NIL) break; | |
286 | field = the_list->string; | |
287 | the_list = the_list->continuation; | |
288 | } | |
289 | return where; | |
290 | } | |
291 | \f | |
292 | line_list | |
293 | make_file_preface () | |
294 | { | |
295 | char *the_string, *temp; | |
296 | long idiotic_interface; | |
297 | long prefix_length; | |
298 | long user_length; | |
299 | long date_length; | |
300 | line_list result; | |
301 | ||
302 | prefix_length = strlen (FROM_PREFIX); | |
303 | time (&idiotic_interface); | |
304 | the_date = ctime (&idiotic_interface); | |
305 | /* the_date has an unwanted newline at the end */ | |
306 | date_length = strlen (the_date) - 1; | |
307 | the_date[date_length] = '\0'; | |
308 | temp = cuserid ((char *) NULL); | |
309 | user_length = strlen (temp); | |
310 | the_user = alloc_string (user_length + 1); | |
311 | strcpy (the_user, temp); | |
312 | the_string = alloc_string (3 + prefix_length + | |
313 | user_length + | |
314 | date_length); | |
315 | temp = the_string; | |
316 | strcpy (temp, FROM_PREFIX); | |
317 | temp = &temp[prefix_length]; | |
318 | *temp++ = ' '; | |
319 | strcpy (temp, the_user); | |
320 | temp = &temp[user_length]; | |
321 | *temp++ = ' '; | |
322 | strcpy (temp, the_date); | |
323 | result = new_list (); | |
324 | result->string = the_string; | |
325 | result->continuation = ((line_list) NULL); | |
326 | return result; | |
327 | } | |
328 | ||
329 | void | |
330 | write_line_list (the_list, the_stream) | |
331 | register line_list the_list; | |
332 | FILE *the_stream; | |
333 | { | |
334 | for ( ; | |
335 | the_list != ((line_list) NULL) ; | |
336 | the_list = the_list->continuation) | |
337 | { | |
338 | fputs (the_list->string, the_stream); | |
339 | putc ('\n', the_stream); | |
340 | } | |
341 | return; | |
342 | } | |
343 | \f | |
344 | int | |
345 | close_the_streams () | |
346 | { | |
347 | register stream_list rem; | |
348 | for (rem = the_streams; | |
349 | rem != ((stream_list) NULL); | |
350 | rem = rem->rest_streams) | |
351 | no_problems = (no_problems && | |
352 | ((*rem->action) (rem->handle) == 0)); | |
353 | the_streams = ((stream_list) NULL); | |
354 | return (no_problems ? 0 : 1); | |
355 | } | |
356 | ||
357 | void | |
358 | add_a_stream (the_stream, closing_action) | |
359 | FILE *the_stream; | |
360 | int (*closing_action)(); | |
361 | { | |
362 | stream_list old = the_streams; | |
363 | the_streams = new_stream (); | |
364 | the_streams->handle = the_stream; | |
365 | the_streams->action = closing_action; | |
366 | the_streams->rest_streams = old; | |
367 | return; | |
368 | } | |
369 | ||
370 | int | |
371 | my_fclose (the_file) | |
372 | FILE *the_file; | |
373 | { | |
374 | putc ('\n', the_file); | |
375 | fflush (the_file); | |
376 | return fclose (the_file); | |
377 | } | |
378 | ||
379 | boolean | |
380 | open_a_file (name) | |
381 | char *name; | |
382 | { | |
383 | FILE *the_stream = fopen (name, "a"); | |
384 | if (the_stream != ((FILE *) NULL)) | |
385 | { | |
386 | add_a_stream (the_stream, my_fclose); | |
387 | if (the_user == ((char *) NULL)) | |
388 | file_preface = make_file_preface (); | |
389 | write_line_list (file_preface, the_stream); | |
390 | return true; | |
391 | } | |
392 | return false; | |
393 | } | |
394 | ||
395 | void | |
396 | put_string (s) | |
397 | char *s; | |
398 | { | |
399 | register stream_list rem; | |
400 | for (rem = the_streams; | |
401 | rem != ((stream_list) NULL); | |
402 | rem = rem->rest_streams) | |
403 | fputs (s, rem->handle); | |
404 | return; | |
405 | } | |
406 | ||
407 | void | |
a492a5b9 RS |
408 | put_line (string) |
409 | char *string; | |
6b3ee98a RS |
410 | { |
411 | register stream_list rem; | |
412 | for (rem = the_streams; | |
413 | rem != ((stream_list) NULL); | |
414 | rem = rem->rest_streams) | |
415 | { | |
a492a5b9 RS |
416 | char *s = string; |
417 | int column = 0; | |
418 | ||
419 | /* Divide STRING into lines. */ | |
420 | while (*s != 0) | |
421 | { | |
422 | char *breakpos; | |
423 | ||
424 | /* Find the last char that fits. */ | |
425 | for (breakpos = s; *breakpos && column < 78; ++breakpos) | |
426 | { | |
427 | if (*breakpos == '\t') | |
428 | column += 8; | |
429 | else | |
430 | column++; | |
431 | } | |
432 | /* Back up to just after the last comma that fits. */ | |
433 | while (breakpos != s && breakpos[-1] != ',') --breakpos; | |
434 | if (breakpos == s) | |
435 | { | |
436 | /* If no comma fits, move past the first address anyway. */ | |
437 | while (*breakpos != 0 && *breakpos != ',') ++breakpos; | |
438 | if (*breakpos != 0) | |
439 | /* Include the comma after it. */ | |
440 | ++breakpos; | |
441 | } | |
442 | /* Output that much, then break the line. */ | |
443 | fwrite (s, 1, breakpos - s, rem->handle); | |
a492a5b9 RS |
444 | column = 8; |
445 | ||
446 | /* Skip whitespace and prepare to print more addresses. */ | |
447 | s = breakpos; | |
448 | while (*s == ' ' || *s == '\t') ++s; | |
c1380f31 RS |
449 | if (*s != 0) |
450 | fputs ("\n\t", rem->handle); | |
a492a5b9 | 451 | } |
6b3ee98a RS |
452 | putc ('\n', rem->handle); |
453 | } | |
454 | return; | |
455 | } | |
456 | \f | |
457 | #define mail_error error | |
458 | ||
459 | void | |
460 | setup_files (the_list, field) | |
461 | register line_list the_list; | |
462 | register char *field; | |
463 | { | |
464 | register char *start; | |
465 | register char c; | |
466 | while (true) | |
467 | { | |
468 | while (((c = *field) != '\0') && | |
469 | ((c == ' ') || | |
470 | (c == '\t') || | |
471 | (c == ','))) | |
472 | field += 1; | |
473 | if (c != '\0') | |
474 | { | |
475 | start = field; | |
476 | while (((c = *field) != '\0') && | |
477 | (c != ' ') && | |
478 | (c != '\t') && | |
479 | (c != ',')) | |
480 | field += 1; | |
481 | *field = '\0'; | |
482 | if (!open_a_file (start)) | |
483 | mail_error ("Could not open file %s", start); | |
484 | *field = c; | |
485 | if (c != '\0') continue; | |
486 | } | |
487 | if (the_list == ((line_list) NULL)) return; | |
488 | field = the_list->string; | |
489 | the_list = the_list->continuation; | |
490 | } | |
491 | } | |
492 | \f | |
493 | int | |
494 | args_size (the_header) | |
495 | header the_header; | |
496 | { | |
497 | register header old = the_header; | |
498 | register line_list rem; | |
499 | register int size = 0; | |
500 | do | |
501 | { | |
502 | char *field; | |
503 | register char *keyword = get_keyword (the_header->text->string, &field); | |
504 | if ((strcmp (keyword, "TO") == 0) || | |
505 | (strcmp (keyword, "CC") == 0) || | |
506 | (strcmp (keyword, "BCC") == 0)) | |
507 | { | |
508 | size += 1 + strlen (field); | |
509 | for (rem = the_header->text->continuation; | |
510 | rem != NIL; | |
511 | rem = rem->continuation) | |
512 | size += 1 + strlen (rem->string); | |
513 | } | |
514 | the_header = the_header->next; | |
515 | } while (the_header != old); | |
516 | return size; | |
517 | } | |
518 | ||
519 | parse_header (the_header, where) | |
520 | header the_header; | |
521 | register char *where; | |
522 | { | |
523 | register header old = the_header; | |
524 | do | |
525 | { | |
526 | char *field; | |
527 | register char *keyword = get_keyword (the_header->text->string, &field); | |
528 | if (strcmp (keyword, "TO") == 0) | |
529 | where = add_field (the_header->text->continuation, field, where); | |
530 | else if (strcmp (keyword, "CC") == 0) | |
531 | where = add_field (the_header->text->continuation, field, where); | |
532 | else if (strcmp (keyword, "BCC") == 0) | |
533 | { | |
534 | where = add_field (the_header->text->continuation, field, where); | |
535 | the_header->previous->next = the_header->next; | |
536 | the_header->next->previous = the_header->previous; | |
537 | } | |
538 | else if (strcmp (keyword, "FCC") == 0) | |
539 | setup_files (the_header->text->continuation, field); | |
540 | the_header = the_header->next; | |
541 | } while (the_header != old); | |
542 | *where = '\0'; | |
543 | return; | |
544 | } | |
545 | \f | |
546 | header | |
547 | read_header () | |
548 | { | |
549 | register header the_header = ((header) NULL); | |
550 | register line_list *next_line = ((line_list *) NULL); | |
551 | ||
552 | init_linebuffer (&lb); | |
553 | ||
554 | do | |
555 | { | |
556 | long length; | |
557 | register char *line; | |
558 | ||
559 | readline (&lb, stdin); | |
560 | line = lb.buffer; | |
561 | length = strlen (line); | |
562 | if (length == 0) break; | |
563 | ||
564 | if (has_keyword (line)) | |
565 | { | |
566 | register header old = the_header; | |
567 | the_header = new_header (); | |
568 | if (old == ((header) NULL)) | |
569 | { | |
570 | the_header->next = the_header; | |
571 | the_header->previous = the_header; | |
572 | } | |
573 | else | |
574 | { | |
575 | the_header->previous = old; | |
576 | the_header->next = old->next; | |
577 | old->next = the_header; | |
578 | } | |
579 | next_line = &(the_header->text); | |
580 | } | |
581 | ||
582 | if (next_line == ((line_list *) NULL)) | |
583 | { | |
584 | /* Not a valid header */ | |
585 | exit (1); | |
586 | } | |
587 | *next_line = new_list (); | |
588 | (*next_line)->string = alloc_string (length); | |
589 | strcpy (((*next_line)->string), line); | |
590 | next_line = &((*next_line)->continuation); | |
591 | *next_line = NIL; | |
592 | ||
593 | } while (true); | |
594 | ||
595 | return the_header->next; | |
596 | } | |
597 | \f | |
598 | void | |
599 | write_header (the_header) | |
600 | header the_header; | |
601 | { | |
602 | register header old = the_header; | |
603 | do | |
604 | { | |
605 | register line_list the_list; | |
606 | for (the_list = the_header->text; | |
607 | the_list != NIL; | |
608 | the_list = the_list->continuation) | |
609 | put_line (the_list->string); | |
610 | the_header = the_header->next; | |
611 | } while (the_header != old); | |
612 | put_line (""); | |
613 | return; | |
614 | } | |
615 | \f | |
616 | void | |
617 | main (argc, argv) | |
618 | int argc; | |
619 | char **argv; | |
620 | { | |
621 | char *command_line; | |
622 | header the_header; | |
623 | long name_length; | |
624 | char *mail_program_name; | |
625 | char buf[BUFLEN + 1]; | |
626 | register int size; | |
627 | FILE *the_pipe; | |
628 | ||
629 | extern char *getenv (); | |
630 | ||
631 | mail_program_name = getenv ("FAKEMAILER"); | |
632 | if (!(mail_program_name && *mail_program_name)) | |
633 | mail_program_name = MAIL_PROGRAM_NAME; | |
634 | name_length = strlen (mail_program_name); | |
635 | ||
636 | my_name = MY_NAME; | |
637 | the_streams = ((stream_list) NULL); | |
638 | the_date = ((char *) NULL); | |
639 | the_user = ((char *) NULL); | |
640 | ||
641 | the_header = read_header (); | |
642 | command_line = alloc_string (name_length + args_size (the_header)); | |
643 | strcpy (command_line, mail_program_name); | |
644 | parse_header (the_header, &command_line[name_length]); | |
645 | ||
646 | the_pipe = popen (command_line, "w"); | |
647 | if (the_pipe == ((FILE *) NULL)) | |
648 | fatal ("cannot open pipe to real mailer"); | |
649 | ||
650 | add_a_stream (the_pipe, pclose); | |
651 | ||
652 | write_header (the_header); | |
653 | ||
654 | /* Dump the message itself */ | |
655 | ||
656 | while (!feof (stdin)) | |
657 | { | |
658 | size = fread (buf, 1, BUFLEN, stdin); | |
659 | buf[size] = '\0'; | |
660 | put_string (buf); | |
661 | } | |
662 | ||
663 | exit (close_the_streams ()); | |
664 | } | |
665 | ||
26528bbc | 666 | #endif /* not MSDOS */ |
6b3ee98a | 667 | #endif /* not BSD 4.2 (or newer) */ |