| 1 | /* sendmail-like interface to /bin/mail for system V, |
| 2 | Copyright (C) 1985, 1994, 1999, 2001, 2002, 2003, 2004, |
| 3 | 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | Author: Bill Rozas <jinx@martigny.ai.mit.edu> |
| 6 | (according to ack.texi) |
| 7 | |
| 8 | This file is part of GNU Emacs. |
| 9 | |
| 10 | GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation, either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | GNU Emacs is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | |
| 24 | #define _XOPEN_SOURCE 500 /* for cuserid */ |
| 25 | |
| 26 | #ifdef HAVE_CONFIG_H |
| 27 | #include <config.h> |
| 28 | #endif |
| 29 | |
| 30 | #if defined (BSD_SYSTEM) && !defined (USE_FAKEMAIL) |
| 31 | /* This program isnot used in BSD, so just avoid loader complaints. */ |
| 32 | int |
| 33 | main () |
| 34 | { |
| 35 | return 0; |
| 36 | } |
| 37 | #else /* not BSD 4.2 (or newer) */ |
| 38 | #ifdef MSDOS |
| 39 | int |
| 40 | main () |
| 41 | { |
| 42 | return 0; |
| 43 | } |
| 44 | #else /* not MSDOS */ |
| 45 | /* This conditional contains all the rest of the file. */ |
| 46 | |
| 47 | /* These are defined in config in some versions. */ |
| 48 | |
| 49 | #ifdef static |
| 50 | #undef static |
| 51 | #endif |
| 52 | |
| 53 | #ifdef WINDOWSNT |
| 54 | #include "ntlib.h" |
| 55 | #endif |
| 56 | |
| 57 | #include <stdio.h> |
| 58 | #include <string.h> |
| 59 | #include <ctype.h> |
| 60 | #include <time.h> |
| 61 | #include <pwd.h> |
| 62 | |
| 63 | /* This is to declare cuserid. */ |
| 64 | #ifdef HAVE_UNISTD_H |
| 65 | #include <unistd.h> |
| 66 | #endif |
| 67 | \f |
| 68 | /* Type definitions */ |
| 69 | |
| 70 | #define boolean int |
| 71 | #define true 1 |
| 72 | #define false 0 |
| 73 | |
| 74 | #define TM_YEAR_BASE 1900 |
| 75 | |
| 76 | /* Nonzero if TM_YEAR is a struct tm's tm_year value that causes |
| 77 | asctime to have well-defined behavior. */ |
| 78 | #ifndef TM_YEAR_IN_ASCTIME_RANGE |
| 79 | # define TM_YEAR_IN_ASCTIME_RANGE(tm_year) \ |
| 80 | (1000 - TM_YEAR_BASE <= (tm_year) && (tm_year) <= 9999 - TM_YEAR_BASE) |
| 81 | #endif |
| 82 | |
| 83 | /* Various lists */ |
| 84 | |
| 85 | struct line_record |
| 86 | { |
| 87 | char *string; |
| 88 | struct line_record *continuation; |
| 89 | }; |
| 90 | typedef struct line_record *line_list; |
| 91 | |
| 92 | struct header_record |
| 93 | { |
| 94 | line_list text; |
| 95 | struct header_record *next; |
| 96 | struct header_record *previous; |
| 97 | }; |
| 98 | typedef struct header_record *header; |
| 99 | |
| 100 | struct stream_record |
| 101 | { |
| 102 | FILE *handle; |
| 103 | int (*action)(); |
| 104 | struct stream_record *rest_streams; |
| 105 | }; |
| 106 | typedef struct stream_record *stream_list; |
| 107 | |
| 108 | /* A `struct linebuffer' is a structure which holds a line of text. |
| 109 | * `readline' reads a line from a stream into a linebuffer |
| 110 | * and works regardless of the length of the line. |
| 111 | */ |
| 112 | |
| 113 | struct linebuffer |
| 114 | { |
| 115 | long size; |
| 116 | char *buffer; |
| 117 | }; |
| 118 | |
| 119 | struct linebuffer lb; |
| 120 | |
| 121 | #define new_list() \ |
| 122 | ((line_list) xmalloc (sizeof (struct line_record))) |
| 123 | #define new_header() \ |
| 124 | ((header) xmalloc (sizeof (struct header_record))) |
| 125 | #define new_stream() \ |
| 126 | ((stream_list) xmalloc (sizeof (struct stream_record))) |
| 127 | #define alloc_string(nchars) \ |
| 128 | ((char *) xmalloc ((nchars) + 1)) |
| 129 | \f |
| 130 | /* Global declarations */ |
| 131 | |
| 132 | #define BUFLEN 1024 |
| 133 | #define KEYWORD_SIZE 256 |
| 134 | #define FROM_PREFIX "From" |
| 135 | #define MY_NAME "fakemail" |
| 136 | #define NIL ((line_list) NULL) |
| 137 | #define INITIAL_LINE_SIZE 200 |
| 138 | |
| 139 | #ifndef MAIL_PROGRAM_NAME |
| 140 | #define MAIL_PROGRAM_NAME "/bin/mail" |
| 141 | #endif |
| 142 | |
| 143 | static char *my_name; |
| 144 | static char *the_date; |
| 145 | static char *the_user; |
| 146 | static line_list file_preface; |
| 147 | static stream_list the_streams; |
| 148 | static boolean no_problems = true; |
| 149 | |
| 150 | extern FILE *popen (); |
| 151 | extern int fclose (), pclose (); |
| 152 | |
| 153 | #ifdef CURRENT_USER |
| 154 | extern struct passwd *getpwuid (); |
| 155 | extern unsigned short geteuid (); |
| 156 | static struct passwd *my_entry; |
| 157 | #define cuserid(s) \ |
| 158 | (my_entry = getpwuid (((int) geteuid ())), \ |
| 159 | my_entry->pw_name) |
| 160 | #endif |
| 161 | \f |
| 162 | /* Utilities */ |
| 163 | |
| 164 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ |
| 165 | |
| 166 | static void |
| 167 | error (s1, s2) |
| 168 | char *s1, *s2; |
| 169 | { |
| 170 | printf ("%s: ", my_name); |
| 171 | printf (s1, s2); |
| 172 | printf ("\n"); |
| 173 | no_problems = false; |
| 174 | } |
| 175 | |
| 176 | /* Print error message and exit. */ |
| 177 | |
| 178 | static void |
| 179 | fatal (s1) |
| 180 | char *s1; |
| 181 | { |
| 182 | error ("%s", s1); |
| 183 | exit (EXIT_FAILURE); |
| 184 | } |
| 185 | |
| 186 | /* Like malloc but get fatal error if memory is exhausted. */ |
| 187 | |
| 188 | static long * |
| 189 | xmalloc (size) |
| 190 | int size; |
| 191 | { |
| 192 | long *result = (long *) malloc (((unsigned) size)); |
| 193 | if (result == ((long *) NULL)) |
| 194 | fatal ("virtual memory exhausted"); |
| 195 | return result; |
| 196 | } |
| 197 | |
| 198 | static long * |
| 199 | xrealloc (ptr, size) |
| 200 | long *ptr; |
| 201 | int size; |
| 202 | { |
| 203 | long *result = (long *) realloc (ptr, ((unsigned) size)); |
| 204 | if (result == ((long *) NULL)) |
| 205 | fatal ("virtual memory exhausted"); |
| 206 | return result; |
| 207 | } |
| 208 | \f |
| 209 | /* Initialize a linebuffer for use */ |
| 210 | |
| 211 | void |
| 212 | init_linebuffer (linebuffer) |
| 213 | struct linebuffer *linebuffer; |
| 214 | { |
| 215 | linebuffer->size = INITIAL_LINE_SIZE; |
| 216 | linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE)); |
| 217 | } |
| 218 | |
| 219 | /* Read a line of text from `stream' into `linebuffer'. |
| 220 | Return the length of the line. */ |
| 221 | |
| 222 | long |
| 223 | readline (linebuffer, stream) |
| 224 | struct linebuffer *linebuffer; |
| 225 | 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 ((long *)buffer, linebuffer->size)); |
| 238 | p = buffer + (p - linebuffer->buffer); |
| 239 | end = buffer + linebuffer->size; |
| 240 | linebuffer->buffer = buffer; |
| 241 | } |
| 242 | if (c < 0 || c == '\n') |
| 243 | { |
| 244 | *p = 0; |
| 245 | break; |
| 246 | } |
| 247 | *p++ = c; |
| 248 | } |
| 249 | |
| 250 | return p - buffer; |
| 251 | } |
| 252 | \f |
| 253 | /* Extract a colon-terminated keyword from the string FIELD. |
| 254 | Return that keyword as a string stored in a static buffer. |
| 255 | Store the address of the rest of the string into *REST. |
| 256 | |
| 257 | If there is no keyword, return NULL and don't alter *REST. */ |
| 258 | |
| 259 | char * |
| 260 | get_keyword (field, rest) |
| 261 | register char *field; |
| 262 | char **rest; |
| 263 | { |
| 264 | static char keyword[KEYWORD_SIZE]; |
| 265 | register char *ptr; |
| 266 | register int c; |
| 267 | |
| 268 | ptr = &keyword[0]; |
| 269 | c = (unsigned char) *field++; |
| 270 | if (isspace (c) || c == ':') |
| 271 | return ((char *) NULL); |
| 272 | *ptr++ = (islower (c) ? toupper (c) : c); |
| 273 | while (((c = (unsigned char) *field++) != ':') && ! isspace (c)) |
| 274 | *ptr++ = (islower (c) ? toupper (c) : c); |
| 275 | *ptr++ = '\0'; |
| 276 | while (isspace (c)) |
| 277 | c = (unsigned char) *field++; |
| 278 | if (c != ':') |
| 279 | return ((char *) NULL); |
| 280 | *rest = field; |
| 281 | return &keyword[0]; |
| 282 | } |
| 283 | |
| 284 | /* Nonzero if the string FIELD starts with a colon-terminated keyword. */ |
| 285 | |
| 286 | boolean |
| 287 | has_keyword (field) |
| 288 | char *field; |
| 289 | { |
| 290 | char *ignored; |
| 291 | return (get_keyword (field, &ignored) != ((char *) NULL)); |
| 292 | } |
| 293 | |
| 294 | /* Store the string FIELD, followed by any lines in THE_LIST, |
| 295 | into the buffer WHERE. |
| 296 | Concatenate lines, putting just a space between them. |
| 297 | Delete everything contained in parentheses. |
| 298 | When a recipient name contains <...>, we discard |
| 299 | everything except what is inside the <...>. |
| 300 | |
| 301 | We don't pay attention to overflowing WHERE; |
| 302 | the caller has to make it big enough. */ |
| 303 | |
| 304 | char * |
| 305 | add_field (the_list, field, where) |
| 306 | line_list the_list; |
| 307 | register char *field, *where; |
| 308 | { |
| 309 | register char c; |
| 310 | while (true) |
| 311 | { |
| 312 | char *this_recipient_where; |
| 313 | int in_quotes = 0; |
| 314 | |
| 315 | *where++ = ' '; |
| 316 | this_recipient_where = where; |
| 317 | |
| 318 | while ((c = *field++) != '\0') |
| 319 | { |
| 320 | if (c == '\\') |
| 321 | *where++ = c; |
| 322 | else if (c == '"') |
| 323 | { |
| 324 | in_quotes = ! in_quotes; |
| 325 | *where++ = c; |
| 326 | } |
| 327 | else if (in_quotes) |
| 328 | *where++ = c; |
| 329 | else if (c == '(') |
| 330 | { |
| 331 | while (*field && *field != ')') ++field; |
| 332 | if (! (*field++)) break; /* no close */ |
| 333 | continue; |
| 334 | } |
| 335 | else if (c == ',') |
| 336 | { |
| 337 | *where++ = ' '; |
| 338 | /* When we get to the end of one recipient, |
| 339 | don't discard it if the next one has <...>. */ |
| 340 | this_recipient_where = where; |
| 341 | } |
| 342 | else if (c == '<') |
| 343 | /* Discard everything we got before the `<'. */ |
| 344 | where = this_recipient_where; |
| 345 | else if (c == '>') |
| 346 | /* Discard the rest of this name that follows the `>'. */ |
| 347 | { |
| 348 | while (*field && *field != ',') ++field; |
| 349 | if (! (*field++)) break; /* no comma */ |
| 350 | continue; |
| 351 | } |
| 352 | else |
| 353 | *where++ = c; |
| 354 | } |
| 355 | if (the_list == NIL) break; |
| 356 | field = the_list->string; |
| 357 | the_list = the_list->continuation; |
| 358 | } |
| 359 | return where; |
| 360 | } |
| 361 | \f |
| 362 | line_list |
| 363 | make_file_preface () |
| 364 | { |
| 365 | char *the_string, *temp; |
| 366 | long idiotic_interface; |
| 367 | struct tm *tm; |
| 368 | long prefix_length; |
| 369 | long user_length; |
| 370 | long date_length; |
| 371 | line_list result; |
| 372 | |
| 373 | prefix_length = strlen (FROM_PREFIX); |
| 374 | time (&idiotic_interface); |
| 375 | /* Convert to a string, checking for out-of-range time stamps. |
| 376 | Don't use 'ctime', as that might dump core if the hardware clock |
| 377 | is set to a bizarre value. */ |
| 378 | tm = localtime (&idiotic_interface); |
| 379 | if (! (tm && TM_YEAR_IN_ASCTIME_RANGE (tm->tm_year) |
| 380 | && (the_date = asctime (tm)))) |
| 381 | fatal ("current time is out of range"); |
| 382 | /* the_date has an unwanted newline at the end */ |
| 383 | date_length = strlen (the_date) - 1; |
| 384 | the_date[date_length] = '\0'; |
| 385 | temp = cuserid ((char *) NULL); |
| 386 | user_length = strlen (temp); |
| 387 | the_user = alloc_string (user_length + 1); |
| 388 | strcpy (the_user, temp); |
| 389 | the_string = alloc_string (3 + prefix_length |
| 390 | + user_length |
| 391 | + date_length); |
| 392 | temp = the_string; |
| 393 | strcpy (temp, FROM_PREFIX); |
| 394 | temp = &temp[prefix_length]; |
| 395 | *temp++ = ' '; |
| 396 | strcpy (temp, the_user); |
| 397 | temp = &temp[user_length]; |
| 398 | *temp++ = ' '; |
| 399 | strcpy (temp, the_date); |
| 400 | result = new_list (); |
| 401 | result->string = the_string; |
| 402 | result->continuation = ((line_list) NULL); |
| 403 | return result; |
| 404 | } |
| 405 | |
| 406 | void |
| 407 | write_line_list (the_list, the_stream) |
| 408 | register line_list the_list; |
| 409 | FILE *the_stream; |
| 410 | { |
| 411 | for ( ; |
| 412 | the_list != ((line_list) NULL) ; |
| 413 | the_list = the_list->continuation) |
| 414 | { |
| 415 | fputs (the_list->string, the_stream); |
| 416 | putc ('\n', the_stream); |
| 417 | } |
| 418 | return; |
| 419 | } |
| 420 | \f |
| 421 | int |
| 422 | close_the_streams () |
| 423 | { |
| 424 | register stream_list rem; |
| 425 | for (rem = the_streams; |
| 426 | rem != ((stream_list) NULL); |
| 427 | rem = rem->rest_streams) |
| 428 | no_problems = (no_problems && |
| 429 | ((*rem->action) (rem->handle) == 0)); |
| 430 | the_streams = ((stream_list) NULL); |
| 431 | return (no_problems ? EXIT_SUCCESS : EXIT_FAILURE); |
| 432 | } |
| 433 | |
| 434 | void |
| 435 | add_a_stream (the_stream, closing_action) |
| 436 | FILE *the_stream; |
| 437 | int (*closing_action)(); |
| 438 | { |
| 439 | stream_list old = the_streams; |
| 440 | the_streams = new_stream (); |
| 441 | the_streams->handle = the_stream; |
| 442 | the_streams->action = closing_action; |
| 443 | the_streams->rest_streams = old; |
| 444 | return; |
| 445 | } |
| 446 | |
| 447 | int |
| 448 | my_fclose (the_file) |
| 449 | FILE *the_file; |
| 450 | { |
| 451 | putc ('\n', the_file); |
| 452 | fflush (the_file); |
| 453 | return fclose (the_file); |
| 454 | } |
| 455 | |
| 456 | boolean |
| 457 | open_a_file (name) |
| 458 | char *name; |
| 459 | { |
| 460 | FILE *the_stream = fopen (name, "a"); |
| 461 | if (the_stream != ((FILE *) NULL)) |
| 462 | { |
| 463 | add_a_stream (the_stream, my_fclose); |
| 464 | if (the_user == ((char *) NULL)) |
| 465 | file_preface = make_file_preface (); |
| 466 | write_line_list (file_preface, the_stream); |
| 467 | return true; |
| 468 | } |
| 469 | return false; |
| 470 | } |
| 471 | |
| 472 | void |
| 473 | put_string (s) |
| 474 | char *s; |
| 475 | { |
| 476 | register stream_list rem; |
| 477 | for (rem = the_streams; |
| 478 | rem != ((stream_list) NULL); |
| 479 | rem = rem->rest_streams) |
| 480 | fputs (s, rem->handle); |
| 481 | return; |
| 482 | } |
| 483 | |
| 484 | void |
| 485 | put_line (string) |
| 486 | char *string; |
| 487 | { |
| 488 | register stream_list rem; |
| 489 | for (rem = the_streams; |
| 490 | rem != ((stream_list) NULL); |
| 491 | rem = rem->rest_streams) |
| 492 | { |
| 493 | char *s = string; |
| 494 | int column = 0; |
| 495 | |
| 496 | /* Divide STRING into lines. */ |
| 497 | while (*s != 0) |
| 498 | { |
| 499 | char *breakpos; |
| 500 | |
| 501 | /* Find the last char that fits. */ |
| 502 | for (breakpos = s; *breakpos && column < 78; ++breakpos) |
| 503 | { |
| 504 | if (*breakpos == '\t') |
| 505 | column += 8; |
| 506 | else |
| 507 | column++; |
| 508 | } |
| 509 | /* If we didn't reach end of line, break the line. */ |
| 510 | if (*breakpos) |
| 511 | { |
| 512 | /* Back up to just after the last comma that fits. */ |
| 513 | while (breakpos != s && breakpos[-1] != ',') --breakpos; |
| 514 | |
| 515 | if (breakpos == s) |
| 516 | { |
| 517 | /* If no comma fits, move past the first address anyway. */ |
| 518 | while (*breakpos != 0 && *breakpos != ',') ++breakpos; |
| 519 | if (*breakpos != 0) |
| 520 | /* Include the comma after it. */ |
| 521 | ++breakpos; |
| 522 | } |
| 523 | } |
| 524 | /* Output that much, then break the line. */ |
| 525 | fwrite (s, 1, breakpos - s, rem->handle); |
| 526 | column = 8; |
| 527 | |
| 528 | /* Skip whitespace and prepare to print more addresses. */ |
| 529 | s = breakpos; |
| 530 | while (*s == ' ' || *s == '\t') ++s; |
| 531 | if (*s != 0) |
| 532 | fputs ("\n\t", rem->handle); |
| 533 | } |
| 534 | putc ('\n', rem->handle); |
| 535 | } |
| 536 | return; |
| 537 | } |
| 538 | \f |
| 539 | #define mail_error error |
| 540 | |
| 541 | /* Handle an FCC field. FIELD is the text of the first line (after |
| 542 | the header name), and THE_LIST holds the continuation lines if any. |
| 543 | Call open_a_file for each file. */ |
| 544 | |
| 545 | void |
| 546 | setup_files (the_list, field) |
| 547 | register line_list the_list; |
| 548 | register char *field; |
| 549 | { |
| 550 | register char *start; |
| 551 | register char c; |
| 552 | while (true) |
| 553 | { |
| 554 | while (((c = *field) != '\0') |
| 555 | && (c == ' ' |
| 556 | || c == '\t' |
| 557 | || c == ',')) |
| 558 | field += 1; |
| 559 | if (c != '\0') |
| 560 | { |
| 561 | start = field; |
| 562 | while (((c = *field) != '\0') |
| 563 | && c != ' ' |
| 564 | && c != '\t' |
| 565 | && c != ',') |
| 566 | field += 1; |
| 567 | *field = '\0'; |
| 568 | if (!open_a_file (start)) |
| 569 | mail_error ("Could not open file %s", start); |
| 570 | *field = c; |
| 571 | if (c != '\0') continue; |
| 572 | } |
| 573 | if (the_list == ((line_list) NULL)) |
| 574 | return; |
| 575 | field = the_list->string; |
| 576 | the_list = the_list->continuation; |
| 577 | } |
| 578 | } |
| 579 | \f |
| 580 | /* Compute the total size of all recipient names stored in THE_HEADER. |
| 581 | The result says how big to make the buffer to pass to parse_header. */ |
| 582 | |
| 583 | int |
| 584 | args_size (the_header) |
| 585 | header the_header; |
| 586 | { |
| 587 | register header old = the_header; |
| 588 | register line_list rem; |
| 589 | register int size = 0; |
| 590 | do |
| 591 | { |
| 592 | char *field; |
| 593 | register char *keyword = get_keyword (the_header->text->string, &field); |
| 594 | if ((strcmp (keyword, "TO") == 0) |
| 595 | || (strcmp (keyword, "CC") == 0) |
| 596 | || (strcmp (keyword, "BCC") == 0)) |
| 597 | { |
| 598 | size += 1 + strlen (field); |
| 599 | for (rem = the_header->text->continuation; |
| 600 | rem != NIL; |
| 601 | rem = rem->continuation) |
| 602 | size += 1 + strlen (rem->string); |
| 603 | } |
| 604 | the_header = the_header->next; |
| 605 | } while (the_header != old); |
| 606 | return size; |
| 607 | } |
| 608 | |
| 609 | /* Scan the header described by the lists THE_HEADER, |
| 610 | and put all recipient names into the buffer WHERE. |
| 611 | Precede each recipient name with a space. |
| 612 | |
| 613 | Also, if the header has any FCC fields, call setup_files for each one. */ |
| 614 | |
| 615 | void |
| 616 | parse_header (the_header, where) |
| 617 | header the_header; |
| 618 | register char *where; |
| 619 | { |
| 620 | register header old = the_header; |
| 621 | do |
| 622 | { |
| 623 | char *field; |
| 624 | register char *keyword = get_keyword (the_header->text->string, &field); |
| 625 | if (strcmp (keyword, "TO") == 0) |
| 626 | where = add_field (the_header->text->continuation, field, where); |
| 627 | else if (strcmp (keyword, "CC") == 0) |
| 628 | where = add_field (the_header->text->continuation, field, where); |
| 629 | else if (strcmp (keyword, "BCC") == 0) |
| 630 | { |
| 631 | where = add_field (the_header->text->continuation, field, where); |
| 632 | the_header->previous->next = the_header->next; |
| 633 | the_header->next->previous = the_header->previous; |
| 634 | } |
| 635 | else if (strcmp (keyword, "FCC") == 0) |
| 636 | setup_files (the_header->text->continuation, field); |
| 637 | the_header = the_header->next; |
| 638 | } while (the_header != old); |
| 639 | *where = '\0'; |
| 640 | return; |
| 641 | } |
| 642 | \f |
| 643 | /* Read lines from the input until we get a blank line. |
| 644 | Create a list of `header' objects, one for each header field, |
| 645 | each of which points to a list of `line_list' objects, |
| 646 | one for each line in that field. |
| 647 | Continuation lines are grouped in the headers they continue. */ |
| 648 | |
| 649 | header |
| 650 | read_header () |
| 651 | { |
| 652 | register header the_header = ((header) NULL); |
| 653 | register line_list *next_line = ((line_list *) NULL); |
| 654 | |
| 655 | init_linebuffer (&lb); |
| 656 | |
| 657 | do |
| 658 | { |
| 659 | long length; |
| 660 | register char *line; |
| 661 | |
| 662 | readline (&lb, stdin); |
| 663 | line = lb.buffer; |
| 664 | length = strlen (line); |
| 665 | if (length == 0) break; |
| 666 | |
| 667 | if (has_keyword (line)) |
| 668 | { |
| 669 | register header old = the_header; |
| 670 | the_header = new_header (); |
| 671 | if (old == ((header) NULL)) |
| 672 | { |
| 673 | the_header->next = the_header; |
| 674 | the_header->previous = the_header; |
| 675 | } |
| 676 | else |
| 677 | { |
| 678 | the_header->previous = old; |
| 679 | the_header->next = old->next; |
| 680 | old->next = the_header; |
| 681 | } |
| 682 | next_line = &(the_header->text); |
| 683 | } |
| 684 | |
| 685 | if (next_line == ((line_list *) NULL)) |
| 686 | { |
| 687 | /* Not a valid header */ |
| 688 | exit (EXIT_FAILURE); |
| 689 | } |
| 690 | *next_line = new_list (); |
| 691 | (*next_line)->string = alloc_string (length); |
| 692 | strcpy (((*next_line)->string), line); |
| 693 | next_line = &((*next_line)->continuation); |
| 694 | *next_line = NIL; |
| 695 | |
| 696 | } while (true); |
| 697 | |
| 698 | if (! the_header) |
| 699 | fatal ("input message has no header"); |
| 700 | return the_header->next; |
| 701 | } |
| 702 | \f |
| 703 | void |
| 704 | write_header (the_header) |
| 705 | header the_header; |
| 706 | { |
| 707 | register header old = the_header; |
| 708 | do |
| 709 | { |
| 710 | register line_list the_list; |
| 711 | for (the_list = the_header->text; |
| 712 | the_list != NIL; |
| 713 | the_list = the_list->continuation) |
| 714 | put_line (the_list->string); |
| 715 | the_header = the_header->next; |
| 716 | } while (the_header != old); |
| 717 | put_line (""); |
| 718 | return; |
| 719 | } |
| 720 | \f |
| 721 | int |
| 722 | main (argc, argv) |
| 723 | int argc; |
| 724 | char **argv; |
| 725 | { |
| 726 | char *command_line; |
| 727 | header the_header; |
| 728 | long name_length; |
| 729 | char *mail_program_name; |
| 730 | char buf[BUFLEN + 1]; |
| 731 | register int size; |
| 732 | FILE *the_pipe; |
| 733 | |
| 734 | extern char *getenv (); |
| 735 | |
| 736 | mail_program_name = getenv ("FAKEMAILER"); |
| 737 | if (!(mail_program_name && *mail_program_name)) |
| 738 | mail_program_name = MAIL_PROGRAM_NAME; |
| 739 | name_length = strlen (mail_program_name); |
| 740 | |
| 741 | my_name = MY_NAME; |
| 742 | the_streams = ((stream_list) NULL); |
| 743 | the_date = ((char *) NULL); |
| 744 | the_user = ((char *) NULL); |
| 745 | |
| 746 | the_header = read_header (); |
| 747 | command_line = alloc_string (name_length + args_size (the_header)); |
| 748 | strcpy (command_line, mail_program_name); |
| 749 | parse_header (the_header, &command_line[name_length]); |
| 750 | |
| 751 | the_pipe = popen (command_line, "w"); |
| 752 | if (the_pipe == ((FILE *) NULL)) |
| 753 | fatal ("cannot open pipe to real mailer"); |
| 754 | |
| 755 | add_a_stream (the_pipe, pclose); |
| 756 | |
| 757 | write_header (the_header); |
| 758 | |
| 759 | /* Dump the message itself */ |
| 760 | |
| 761 | while (!feof (stdin)) |
| 762 | { |
| 763 | size = fread (buf, 1, BUFLEN, stdin); |
| 764 | buf[size] = '\0'; |
| 765 | put_string (buf); |
| 766 | } |
| 767 | |
| 768 | exit (close_the_streams ()); |
| 769 | } |
| 770 | |
| 771 | #endif /* not MSDOS */ |
| 772 | #endif /* not BSD 4.2 (or newer) */ |
| 773 | |
| 774 | /* arch-tag: acb0afa6-315a-4c5b-b9e3-def5725c8783 |
| 775 | (do not change this comment) */ |
| 776 | |
| 777 | /* fakemail.c ends here */ |