| 1 | # |
| 2 | |
| 3 | #include "rcv.h" |
| 4 | #include <sys/stat.h> |
| 5 | #include <errno.h> |
| 6 | |
| 7 | /* |
| 8 | * Mail -- a mail program |
| 9 | * |
| 10 | * File I/O. |
| 11 | */ |
| 12 | |
| 13 | static char *SccsId = "@(#)fio.c 1.8 %G%"; |
| 14 | |
| 15 | /* |
| 16 | * Set up the input pointers while copying the mail file into |
| 17 | * /tmp. |
| 18 | */ |
| 19 | |
| 20 | setptr(ibuf) |
| 21 | FILE *ibuf; |
| 22 | { |
| 23 | register int c; |
| 24 | register char *cp, *cp2; |
| 25 | register int count, s, l; |
| 26 | off_t offset; |
| 27 | char linebuf[LINESIZE]; |
| 28 | char wbuf[LINESIZE]; |
| 29 | int maybe, mestmp, flag, inhead; |
| 30 | struct message this; |
| 31 | extern char tempSet[]; |
| 32 | |
| 33 | if ((mestmp = opentemp(tempSet)) < 0) |
| 34 | exit(1); |
| 35 | msgCount = 0; |
| 36 | offset = 0; |
| 37 | s = 0; |
| 38 | l = 0; |
| 39 | maybe = 1; |
| 40 | flag = MUSED|MNEW; |
| 41 | for (;;) { |
| 42 | cp = linebuf; |
| 43 | c = getc(ibuf); |
| 44 | while (c != EOF && c != '\n') { |
| 45 | if (cp - linebuf >= BUFSIZ - 1) { |
| 46 | ungetc(c, ibuf); |
| 47 | *cp = 0; |
| 48 | break; |
| 49 | } |
| 50 | *cp++ = c; |
| 51 | c = getc(ibuf); |
| 52 | } |
| 53 | *cp = 0; |
| 54 | if (cp == linebuf && c == EOF) { |
| 55 | this.m_flag = flag; |
| 56 | flag = MUSED|MNEW; |
| 57 | this.m_offset = offsetof(offset); |
| 58 | this.m_block = blockof(offset); |
| 59 | this.m_size = s; |
| 60 | this.m_lines = l; |
| 61 | if (append(&this, mestmp)) { |
| 62 | perror(tempSet); |
| 63 | exit(1); |
| 64 | } |
| 65 | fclose(ibuf); |
| 66 | makemessage(mestmp); |
| 67 | close(mestmp); |
| 68 | return; |
| 69 | } |
| 70 | count = cp - linebuf + 1; |
| 71 | for (cp = linebuf; *cp;) |
| 72 | putc(*cp++, otf); |
| 73 | putc('\n', otf); |
| 74 | if (ferror(otf)) { |
| 75 | perror("/tmp"); |
| 76 | exit(1); |
| 77 | } |
| 78 | if (maybe && linebuf[0] == 'F' && ishead(linebuf)) { |
| 79 | msgCount++; |
| 80 | this.m_flag = flag; |
| 81 | flag = MUSED|MNEW; |
| 82 | inhead = 1; |
| 83 | this.m_block = blockof(offset); |
| 84 | this.m_offset = offsetof(offset); |
| 85 | this.m_size = s; |
| 86 | this.m_lines = l; |
| 87 | s = 0; |
| 88 | l = 0; |
| 89 | if (append(&this, mestmp)) { |
| 90 | perror(tempSet); |
| 91 | exit(1); |
| 92 | } |
| 93 | } |
| 94 | if (linebuf[0] == 0) |
| 95 | inhead = 0; |
| 96 | if (inhead && index(linebuf, ':')) { |
| 97 | cp = linebuf; |
| 98 | cp2 = wbuf; |
| 99 | while (isalpha(*cp)) |
| 100 | *cp2++ = *cp++; |
| 101 | *cp2 = 0; |
| 102 | if (icequal(wbuf, "status")) { |
| 103 | cp = index(linebuf, ':'); |
| 104 | if (index(cp, 'R')) |
| 105 | flag |= MREAD; |
| 106 | if (index(cp, 'O')) |
| 107 | flag &= ~MNEW; |
| 108 | inhead = 0; |
| 109 | } |
| 110 | } |
| 111 | offset += count; |
| 112 | s += count; |
| 113 | l++; |
| 114 | maybe = 0; |
| 115 | if (linebuf[0] == 0) |
| 116 | maybe = 1; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /* |
| 121 | * Drop the passed line onto the passed output buffer. |
| 122 | * If a write error occurs, return -1, else the count of |
| 123 | * characters written, including the newline. |
| 124 | */ |
| 125 | |
| 126 | putline(obuf, linebuf) |
| 127 | FILE *obuf; |
| 128 | char *linebuf; |
| 129 | { |
| 130 | register int c; |
| 131 | |
| 132 | c = strlen(linebuf); |
| 133 | fputs(linebuf, obuf); |
| 134 | putc('\n', obuf); |
| 135 | if (ferror(obuf)) |
| 136 | return(-1); |
| 137 | return(c+1); |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * Quickly read a line from the specified input into the line |
| 142 | * buffer; return characters read. |
| 143 | */ |
| 144 | |
| 145 | freadline(ibuf, linebuf) |
| 146 | register FILE *ibuf; |
| 147 | register char *linebuf; |
| 148 | { |
| 149 | register int c; |
| 150 | register char *cp; |
| 151 | |
| 152 | c = getc(ibuf); |
| 153 | cp = linebuf; |
| 154 | while (c != '\n' && c != EOF) { |
| 155 | if (c == 0) { |
| 156 | c = getc(ibuf); |
| 157 | continue; |
| 158 | } |
| 159 | if (cp - linebuf >= BUFSIZ-1) { |
| 160 | *cp = 0; |
| 161 | return(cp - linebuf + 1); |
| 162 | } |
| 163 | *cp++ = c; |
| 164 | c = getc(ibuf); |
| 165 | } |
| 166 | if (c == EOF && cp == linebuf) |
| 167 | return(0); |
| 168 | *cp = 0; |
| 169 | return(cp - linebuf + 1); |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Read up a line from the specified input into the line |
| 174 | * buffer. Return the number of characters read. Do not |
| 175 | * include the newline at the end. |
| 176 | */ |
| 177 | |
| 178 | readline(ibuf, linebuf) |
| 179 | FILE *ibuf; |
| 180 | char *linebuf; |
| 181 | { |
| 182 | register char *cp; |
| 183 | register int c; |
| 184 | |
| 185 | do { |
| 186 | clearerr(ibuf); |
| 187 | c = getc(ibuf); |
| 188 | for (cp = linebuf; c != '\n' && c != EOF; c = getc(ibuf)) { |
| 189 | if (c == 0) |
| 190 | continue; |
| 191 | if (cp - linebuf < LINESIZE-2) |
| 192 | *cp++ = c; |
| 193 | } |
| 194 | } while (ferror(ibuf) && ibuf == stdin); |
| 195 | *cp = 0; |
| 196 | if (c == EOF && cp == linebuf) |
| 197 | return(0); |
| 198 | return(cp - linebuf + 1); |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * Return a file buffer all ready to read up the |
| 203 | * passed message pointer. |
| 204 | */ |
| 205 | |
| 206 | FILE * |
| 207 | setinput(mp) |
| 208 | register struct message *mp; |
| 209 | { |
| 210 | off_t off; |
| 211 | |
| 212 | fflush(otf); |
| 213 | off = mp->m_block; |
| 214 | off <<= 9; |
| 215 | off += mp->m_offset; |
| 216 | if (fseek(itf, off, 0) < 0) { |
| 217 | perror("fseek"); |
| 218 | panic("temporary file seek"); |
| 219 | } |
| 220 | return(itf); |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Take the data out of the passed ghost file and toss it into |
| 225 | * a dynamically allocated message structure. |
| 226 | */ |
| 227 | |
| 228 | makemessage(f) |
| 229 | { |
| 230 | register struct message *m; |
| 231 | register char *mp; |
| 232 | register count; |
| 233 | |
| 234 | mp = calloc((unsigned) (msgCount + 1), sizeof *m); |
| 235 | if (mp == NOSTR) { |
| 236 | printf("Insufficient memory for %d messages\n", msgCount); |
| 237 | exit(1); |
| 238 | } |
| 239 | if (message != (struct message *) 0) |
| 240 | cfree((char *) message); |
| 241 | message = (struct message *) mp; |
| 242 | dot = message; |
| 243 | lseek(f, 0L, 0); |
| 244 | while (count = read(f, mp, BUFSIZ)) |
| 245 | mp += count; |
| 246 | for (m = &message[0]; m < &message[msgCount]; m++) { |
| 247 | m->m_size = (m+1)->m_size; |
| 248 | m->m_lines = (m+1)->m_lines; |
| 249 | m->m_flag = (m+1)->m_flag; |
| 250 | } |
| 251 | message[msgCount].m_size = 0; |
| 252 | message[msgCount].m_lines = 0; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Append the passed message descriptor onto the temp file. |
| 257 | * If the write fails, return 1, else 0 |
| 258 | */ |
| 259 | |
| 260 | append(mp, f) |
| 261 | struct message *mp; |
| 262 | { |
| 263 | if (write(f, (char *) mp, sizeof *mp) != sizeof *mp) |
| 264 | return(1); |
| 265 | return(0); |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Delete a file, but only if the file is a plain file. |
| 270 | */ |
| 271 | |
| 272 | remove(name) |
| 273 | char name[]; |
| 274 | { |
| 275 | struct stat statb; |
| 276 | extern int errno; |
| 277 | |
| 278 | if (stat(name, &statb) < 0) |
| 279 | return(-1); |
| 280 | if ((statb.st_mode & S_IFMT) != S_IFREG) { |
| 281 | errno = EISDIR; |
| 282 | return(-1); |
| 283 | } |
| 284 | return(unlink(name)); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Terminate an editing session by attempting to write out the user's |
| 289 | * file from the temporary. |
| 290 | */ |
| 291 | |
| 292 | edstop() |
| 293 | { |
| 294 | register int gotcha, c; |
| 295 | register struct message *mp; |
| 296 | FILE *obuf; |
| 297 | |
| 298 | if (readonly) |
| 299 | return; |
| 300 | for (mp = &message[0], gotcha = 0; mp < &message[msgCount]; mp++) { |
| 301 | if (mp->m_flag & MNEW) { |
| 302 | mp->m_flag &= ~MNEW; |
| 303 | mp->m_flag |= MSTATUS; |
| 304 | } |
| 305 | if (mp->m_flag & (MODIFY|MDELETED|MSTATUS)) { |
| 306 | gotcha++; |
| 307 | break; |
| 308 | } |
| 309 | } |
| 310 | if (!gotcha) |
| 311 | return; |
| 312 | printf("\"%s\" ", editfile); |
| 313 | flush(); |
| 314 | if ((obuf = fopen(editfile, "w")) == NULL) { |
| 315 | perror(editfile); |
| 316 | reset(0); |
| 317 | } |
| 318 | c = 0; |
| 319 | for (mp = &message[0]; mp < &message[msgCount]; mp++) { |
| 320 | if ((mp->m_flag & MDELETED) != 0) |
| 321 | continue; |
| 322 | c++; |
| 323 | if (send(mp, obuf) < 0) { |
| 324 | perror(editfile); |
| 325 | reset(0); |
| 326 | } |
| 327 | } |
| 328 | fflush(obuf); |
| 329 | if (ferror(obuf)) { |
| 330 | perror(editfile); |
| 331 | reset(0); |
| 332 | } |
| 333 | if (c == 0) { |
| 334 | remove(editfile); |
| 335 | printf("removed\n"); |
| 336 | } |
| 337 | else |
| 338 | printf("complete\n"); |
| 339 | flush(); |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Empty the output buffer. |
| 344 | */ |
| 345 | |
| 346 | clrbuf(buf) |
| 347 | register FILE *buf; |
| 348 | { |
| 349 | |
| 350 | buf = stdout; |
| 351 | buf->_ptr = buf->_base; |
| 352 | buf->_cnt = BUFSIZ; |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * Open a temp file by creating, closing, unlinking, and |
| 357 | * reopening. Return the open file descriptor. |
| 358 | */ |
| 359 | |
| 360 | opentemp(file) |
| 361 | char file[]; |
| 362 | { |
| 363 | register int f; |
| 364 | |
| 365 | if ((f = creat(file, 0600)) < 0) { |
| 366 | perror(file); |
| 367 | return(-1); |
| 368 | } |
| 369 | close(f); |
| 370 | if ((f = open(file, 2)) < 0) { |
| 371 | perror(file); |
| 372 | remove(file); |
| 373 | return(-1); |
| 374 | } |
| 375 | remove(file); |
| 376 | return(f); |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * Flush the standard output. |
| 381 | */ |
| 382 | |
| 383 | flush() |
| 384 | { |
| 385 | fflush(stdout); |
| 386 | fflush(stderr); |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Determine the size of the file possessed by |
| 391 | * the passed buffer. |
| 392 | */ |
| 393 | |
| 394 | off_t |
| 395 | fsize(iob) |
| 396 | FILE *iob; |
| 397 | { |
| 398 | register int f; |
| 399 | struct stat sbuf; |
| 400 | |
| 401 | f = fileno(iob); |
| 402 | if (fstat(f, &sbuf) < 0) |
| 403 | return(0); |
| 404 | return(sbuf.st_size); |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | * Take a file name, possibly with shell meta characters |
| 409 | * in it and expand it by using "sh -c echo filename" |
| 410 | * Return the file name as a dynamic string. |
| 411 | */ |
| 412 | |
| 413 | char * |
| 414 | expand(name) |
| 415 | char name[]; |
| 416 | { |
| 417 | char xname[BUFSIZ]; |
| 418 | char cmdbuf[BUFSIZ]; |
| 419 | register int pid, l, rc; |
| 420 | register char *cp, *Shell; |
| 421 | int s, pivec[2], (*sigint)(); |
| 422 | struct stat sbuf; |
| 423 | |
| 424 | if (!anyof(name, "~{[*?$`'\"\\")) |
| 425 | return(name); |
| 426 | /* sigint = signal(SIGINT, SIG_IGN); */ |
| 427 | if (pipe(pivec) < 0) { |
| 428 | perror("pipe"); |
| 429 | /* signal(SIGINT, sigint) */ |
| 430 | return(name); |
| 431 | } |
| 432 | sprintf(cmdbuf, "echo %s", name); |
| 433 | if ((pid = vfork()) == 0) { |
| 434 | Shell = value("SHELL"); |
| 435 | if (Shell == NOSTR) |
| 436 | Shell = SHELL; |
| 437 | close(pivec[0]); |
| 438 | close(1); |
| 439 | dup(pivec[1]); |
| 440 | close(pivec[1]); |
| 441 | close(2); |
| 442 | execl(Shell, Shell, "-c", cmdbuf, 0); |
| 443 | _exit(1); |
| 444 | } |
| 445 | if (pid == -1) { |
| 446 | perror("fork"); |
| 447 | close(pivec[0]); |
| 448 | close(pivec[1]); |
| 449 | return(NOSTR); |
| 450 | } |
| 451 | close(pivec[1]); |
| 452 | l = read(pivec[0], xname, BUFSIZ); |
| 453 | close(pivec[0]); |
| 454 | while (wait(&s) != pid); |
| 455 | ; |
| 456 | s &= 0377; |
| 457 | if (s != 0 && s != SIGPIPE) { |
| 458 | fprintf(stderr, "\"Echo\" failed\n"); |
| 459 | goto err; |
| 460 | } |
| 461 | if (l < 0) { |
| 462 | perror("read"); |
| 463 | goto err; |
| 464 | } |
| 465 | if (l == 0) { |
| 466 | fprintf(stderr, "\"%s\": No match\n", name); |
| 467 | goto err; |
| 468 | } |
| 469 | if (l == BUFSIZ) { |
| 470 | fprintf(stderr, "Buffer overflow expanding \"%s\"\n", name); |
| 471 | goto err; |
| 472 | } |
| 473 | xname[l] = 0; |
| 474 | for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--) |
| 475 | ; |
| 476 | *++cp = '\0'; |
| 477 | if (any(' ', xname) && stat(xname, &sbuf) < 0) { |
| 478 | fprintf(stderr, "\"%s\": Ambiguous\n", name); |
| 479 | goto err; |
| 480 | } |
| 481 | /* signal(SIGINT, sigint) */ |
| 482 | return(savestr(xname)); |
| 483 | |
| 484 | err: |
| 485 | /* signal(SIGINT, sigint); */ |
| 486 | return(NOSTR); |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * A nicer version of Fdopen, which allows us to fclose |
| 491 | * without losing the open file. |
| 492 | */ |
| 493 | |
| 494 | FILE * |
| 495 | Fdopen(fildes, mode) |
| 496 | char *mode; |
| 497 | { |
| 498 | register int f; |
| 499 | FILE *fdopen(); |
| 500 | |
| 501 | f = dup(fildes); |
| 502 | if (f < 0) { |
| 503 | perror("dup"); |
| 504 | return(NULL); |
| 505 | } |
| 506 | return(fdopen(f, mode)); |
| 507 | } |