1 /* sendmail-like interface to /bin/mail for system V,
2 Copyright (C) 1985, 1994 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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)
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.
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. */
21 /* Synched up with: FSF 19.28. */
26 #if defined (BSD) && !defined (BSD4_1) && !defined (USE_FAKEMAIL)
27 /* This program is not used in BSD, so just avoid loader complaints. */
29 main (int argc, char *argv[])
37 main (int argc, char *argv[])
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");
48 #else /* not BSD 4.2 (or newer) */
50 /* These are defined in config in some versions. */
64 #if __STDC__ || defined(STDC_HEADERS)
73 /* Type definitions */
84 struct line_record *continuation;
86 typedef struct line_record *line_list;
91 struct header_record *next;
92 struct header_record *previous;
94 typedef struct header_record *header;
99 int (*action)(FILE *);
100 struct stream_record *rest_streams;
102 typedef struct stream_record *stream_list;
104 /* A `struct linebuffer' is a structure which holds a line of text.
105 * `readline' reads a line from a stream into a linebuffer
106 * and works regardless of the length of the line.
115 struct linebuffer lb;
118 ((line_list) xmalloc (sizeof (struct line_record)))
119 #define new_header() \
120 ((header) xmalloc (sizeof (struct header_record)))
121 #define new_stream() \
122 ((stream_list) xmalloc (sizeof (struct stream_record)))
123 #define alloc_string(nchars) \
124 ((char *) xmalloc ((nchars) + 1))
126 /* Global declarations */
129 #define KEYWORD_SIZE 256
130 #define FROM_PREFIX "From"
131 #define MY_NAME "fakemail"
132 #define NIL ((line_list) NULL)
133 #define INITIAL_LINE_SIZE 200
135 #ifndef MAIL_PROGRAM_NAME
136 #define MAIL_PROGRAM_NAME "/bin/mail"
139 static const char *my_name;
140 static char *the_date;
141 static char *the_user;
142 static line_list file_preface;
143 static stream_list the_streams;
144 static boolean no_problems = true;
146 #if !__STDC__ && !defined(STDC_HEADERS)
147 extern FILE *popen ();
148 extern int fclose (), pclose ();
149 extern char *malloc (), *realloc ();
153 extern struct passwd *getpwuid ();
154 extern unsigned short geteuid ();
155 static struct passwd *my_entry;
157 (my_entry = getpwuid ((int) geteuid ()), \
163 /* Print error message. `s1' is printf control string, `s2' is arg for it. */
166 error (const char *s1, const char *s2)
168 printf ("%s: ", my_name);
174 /* Print error message and exit. */
177 fatal (const char *s1, const char *s2)
183 /* Like malloc but get fatal error if memory is exhausted. */
186 xmalloc (size_t size)
188 void *result = malloc (size);
190 fatal ("virtual memory exhausted", (char *) 0);
195 xrealloc (void *ptr, size_t size)
197 void *result = realloc (ptr, size);
199 fatal ("virtual memory exhausted", (char *) 0);
203 /* Initialize a linebuffer for use */
206 init_linebuffer (struct linebuffer *linebuffer)
208 linebuffer->size = INITIAL_LINE_SIZE;
209 linebuffer->buffer = (char *) xmalloc (INITIAL_LINE_SIZE);
212 /* Read a line of text from `stream' into `linebuffer'.
213 * Return the length of the line.
217 readline (struct linebuffer *linebuffer, FILE *stream)
219 char *buffer = linebuffer->buffer;
220 char *p = linebuffer->buffer;
221 char *end = p + linebuffer->size;
225 int c = getc (stream);
228 linebuffer->size *= 2;
229 buffer = (char *) xrealloc (buffer, linebuffer->size);
230 p = buffer + (p - linebuffer->buffer);
231 end = buffer + linebuffer->size;
232 linebuffer->buffer = buffer;
234 if (c < 0 || c == '\n')
246 get_keyword (register char *field, char **rest)
248 static char keyword[KEYWORD_SIZE];
254 if ((isspace ((int) (unsigned char) c)) || (c == ':'))
255 return (char *) NULL;
256 *ptr++ = ((islower ((int) (unsigned char) c)) ?
257 (toupper ((int) (unsigned char) c)) : c);
258 while (((c = *field++) != ':') &&
259 (!(isspace ((int) (unsigned char) c))))
260 *ptr++ = ((islower ((int) (unsigned char) c)) ?
261 (toupper ((int) (unsigned char) c)) : c);
263 while (isspace ((int) (unsigned char) c)) c = *field++;
264 if (c != ':') return (char *) NULL;
270 has_keyword (char *field)
273 return (get_keyword (field, &ignored) != (char *) NULL);
277 add_field (line_list the_list, register char *field, register char *where)
283 while ((c = *field++) != '\0')
287 while (*field && *field != ')') ++field;
288 if (! (*field++)) break; /* no closer */
289 if (! (*field)) break; /* closerNULL */
292 *where++ = ((c == ','||c=='>'||c=='<') ? ' ' : c);
294 if (the_list == NIL) break;
295 field = the_list->string;
296 the_list = the_list->continuation;
302 make_file_preface (void)
304 char *the_string, *temp;
305 time_t idiotic_interface;
311 prefix_length = strlen (FROM_PREFIX);
312 time (&idiotic_interface);
313 the_date = ctime (&idiotic_interface);
314 /* the_date has an unwanted newline at the end */
315 date_length = strlen (the_date) - 1;
316 if (the_date[date_length] == '\n')
317 the_date[date_length] = '\0';
321 temp = cuserid ((char *) NULL);
323 user_length = strlen (temp);
324 the_user = alloc_string ((size_t) (user_length + 1));
325 strcpy (the_user, temp);
326 the_string = alloc_string ((size_t) (3 + prefix_length +
330 strcpy (temp, FROM_PREFIX);
331 temp = &temp[prefix_length];
333 strcpy (temp, the_user);
334 temp = &temp[user_length];
336 strcpy (temp, the_date);
337 result = new_list ();
338 result->string = the_string;
339 result->continuation = ((line_list) NULL);
344 write_line_list (register line_list the_list, FILE *the_stream)
347 the_list != ((line_list) NULL) ;
348 the_list = the_list->continuation)
350 fputs (the_list->string, the_stream);
351 putc ('\n', the_stream);
357 close_the_streams (void)
359 register stream_list rem;
360 for (rem = the_streams;
361 rem != ((stream_list) NULL);
362 rem = rem->rest_streams)
363 no_problems = (no_problems &&
364 ((*rem->action) (rem->handle) == 0));
365 the_streams = ((stream_list) NULL);
366 return (no_problems ? 0 : 1);
370 add_a_stream (FILE *the_stream, int (*closing_action)(FILE *))
372 stream_list old = the_streams;
373 the_streams = new_stream ();
374 the_streams->handle = the_stream;
375 the_streams->action = closing_action;
376 the_streams->rest_streams = old;
381 my_fclose (FILE *the_file)
383 putc ('\n', the_file);
385 return fclose (the_file);
389 open_a_file (char *name)
391 FILE *the_stream = fopen (name, "a");
392 if (the_stream != ((FILE *) NULL))
394 add_a_stream (the_stream, my_fclose);
395 if (the_user == (char *) NULL)
396 file_preface = make_file_preface ();
397 write_line_list (file_preface, the_stream);
406 register stream_list rem;
407 for (rem = the_streams;
408 rem != ((stream_list) NULL);
409 rem = rem->rest_streams)
410 fputs (s, rem->handle);
415 put_line (const char *string)
417 register stream_list rem;
418 for (rem = the_streams;
419 rem != ((stream_list) NULL);
420 rem = rem->rest_streams)
422 const char *s = string;
425 /* Divide STRING into lines. */
428 const char *breakpos;
430 /* Find the last char that fits. */
431 for (breakpos = s; *breakpos && column < 78; ++breakpos)
433 if (*breakpos == '\t')
438 /* If we didn't reach end of line, break the line. */
441 /* Back up to just after the last comma that fits. */
442 while (breakpos != s && breakpos[-1] != ',') --breakpos;
446 /* If no comma fits, move past the first address anyway. */
447 while (*breakpos != 0 && *breakpos != ',') ++breakpos;
449 /* Include the comma after it. */
453 /* Output that much, then break the line. */
454 fwrite (s, 1, breakpos - s, rem->handle);
457 /* Skip whitespace and prepare to print more addresses. */
459 while (*s == ' ' || *s == '\t') ++s;
461 fputs ("\n\t", rem->handle);
463 putc ('\n', rem->handle);
468 #define mail_error error
471 setup_files (register line_list the_list, register char *field)
473 register char *start;
477 while (((c = *field) != '\0') &&
485 while (((c = *field) != '\0') &&
491 if (!open_a_file (start))
492 mail_error ("Could not open file %s", start);
494 if (c != '\0') continue;
496 if (the_list == ((line_list) NULL)) return;
497 field = the_list->string;
498 the_list = the_list->continuation;
503 args_size (header the_header)
505 register header old = the_header;
506 register line_list rem;
507 register int size = 0;
511 register char *keyword = get_keyword (the_header->text->string, &field);
512 if ((strcmp (keyword, "TO") == 0) ||
513 (strcmp (keyword, "CC") == 0) ||
514 (strcmp (keyword, "BCC") == 0))
516 size += 1 + strlen (field);
517 for (rem = the_header->text->continuation;
519 rem = rem->continuation)
520 size += 1 + strlen (rem->string);
522 the_header = the_header->next;
523 } while (the_header != old);
528 parse_header (header the_header, register char *where)
530 register header old = the_header;
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)
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;
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);
556 register header the_header = ((header) NULL);
557 register line_list *next_line = ((line_list *) NULL);
559 init_linebuffer (&lb);
566 readline (&lb, stdin);
568 length = strlen (line);
569 if (length == 0) break;
571 if (has_keyword (line))
573 register header old = the_header;
574 the_header = new_header ();
575 if (old == ((header) NULL))
577 the_header->next = the_header;
578 the_header->previous = the_header;
582 the_header->previous = old;
583 the_header->next = old->next;
584 old->next = the_header;
586 next_line = &(the_header->text);
589 if (next_line == ((line_list *) NULL))
591 /* Not a valid header */
594 *next_line = new_list ();
595 (*next_line)->string = alloc_string ((size_t) length);
596 strcpy (((*next_line)->string), line);
597 next_line = &((*next_line)->continuation);
602 return the_header->next;
606 write_header (header the_header)
608 register header old = the_header;
611 register line_list the_list;
612 for (the_list = the_header->text;
614 the_list = the_list->continuation)
615 put_line (the_list->string);
616 the_header = the_header->next;
617 } while (the_header != old);
623 main (int argc, char *argv[])
628 char *mail_program_name;
629 char buf[BUFLEN + 1];
633 mail_program_name = getenv ("FAKEMAILER");
634 if (!(mail_program_name && *mail_program_name))
635 mail_program_name = (char *) MAIL_PROGRAM_NAME;
636 name_length = strlen (mail_program_name);
639 the_streams = ((stream_list) NULL);
640 the_date = (char *) NULL;
641 the_user = (char *) NULL;
643 the_header = read_header ();
644 command_line = alloc_string ((size_t) (name_length +
645 args_size (the_header)));
646 strcpy (command_line, mail_program_name);
647 parse_header (the_header, &command_line[name_length]);
649 the_pipe = popen (command_line, "w");
650 if (the_pipe == ((FILE *) NULL))
651 fatal ("cannot open pipe to real mailer", (char *) NULL);
653 add_a_stream (the_pipe, pclose);
655 write_header (the_header);
657 /* Dump the message itself */
659 while (!feof (stdin))
661 size = fread (buf, 1, BUFLEN, stdin);
666 return close_the_streams ();
669 #endif /* not BSD 4.2 (or newer) */