fio.c revision 1.14
1 /* $NetBSD: fio.c,v 1.14 2001/12/19 00:06:11 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)fio.c 8.2 (Berkeley) 4/20/95"; 40 #else 41 __RCSID("$NetBSD: fio.c,v 1.14 2001/12/19 00:06:11 christos Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include "rcv.h" 46 #include "extern.h" 47 48 /* 49 * Mail -- a mail program 50 * 51 * File I/O. 52 */ 53 extern int wait_status; 54 extern char *tmpdir; 55 56 /* 57 * Set up the input pointers while copying the mail file into /tmp. 58 */ 59 void 60 setptr(ibuf, offset) 61 FILE *ibuf; 62 off_t offset; 63 { 64 int c, count; 65 char *cp, *cp2; 66 struct message this; 67 FILE *mestmp; 68 int maybe, inhead; 69 char linebuf[LINESIZE]; 70 int omsgCount; 71 72 /* Get temporary file. */ 73 (void)snprintf(linebuf, LINESIZE, "%s/mail.XXXXXX", tmpdir); 74 if ((c = mkstemp(linebuf)) == -1 || 75 (mestmp = Fdopen(c, "r+")) == NULL) { 76 (void)fprintf(stderr, "mail: can't open %s\n", linebuf); 77 exit(1); 78 } 79 (void)unlink(linebuf); 80 81 if (offset == 0) { 82 msgCount = 0; 83 } else { 84 /* Seek into the file to get to the new messages */ 85 (void) fseek(ibuf, offset, 0); 86 /* 87 * We need to make "offset" a pointer to the end of 88 * the temp file that has the copy of the mail file. 89 * If any messages have been edited, this will be 90 * different from the offset into the mail file. 91 */ 92 (void) fseek(otf, 0L, 2); 93 offset = ftell(otf); 94 } 95 omsgCount = msgCount; 96 maybe = 1; 97 inhead = 0; 98 this.m_flag = MUSED|MNEW; 99 this.m_size = 0; 100 this.m_lines = 0; 101 this.m_block = 0; 102 this.m_offset = 0; 103 for (;;) { 104 if (fgets(linebuf, LINESIZE, ibuf) == NULL) { 105 if (append(&this, mestmp)) { 106 perror("temporary file"); 107 exit(1); 108 } 109 makemessage(mestmp, omsgCount); 110 return; 111 } 112 count = strlen(linebuf); 113 /* 114 * Transforms lines ending in <CR><LF> to just <LF>. 115 * This allows mail to be able to read Eudora mailboxes 116 * that reside on a DOS partition. 117 */ 118 if (count >= 2 && linebuf[count-1] == '\n' && linebuf[count-2] == '\r') { 119 linebuf[count-2] = '\n'; 120 count--; 121 } 122 (void) fwrite(linebuf, sizeof *linebuf, count, otf); 123 if (ferror(otf)) { 124 perror("/tmp"); 125 exit(1); 126 } 127 if(count) 128 linebuf[count - 1] = 0; 129 if (maybe && linebuf[0] == 'F' && ishead(linebuf)) { 130 msgCount++; 131 if (append(&this, mestmp)) { 132 perror("temporary file"); 133 exit(1); 134 } 135 this.m_flag = MUSED|MNEW; 136 this.m_size = 0; 137 this.m_lines = 0; 138 this.m_block = blockof(offset); 139 this.m_offset = offsetof(offset); 140 inhead = 1; 141 } else if (linebuf[0] == 0) { 142 inhead = 0; 143 } else if (inhead) { 144 for (cp = linebuf, cp2 = "status";; cp++) { 145 if ((c = *cp2++) == 0) { 146 while (isspace((unsigned char)*cp++)) 147 ; 148 if (cp[-1] != ':') 149 break; 150 while ((c = *cp++) != '\0') 151 if (c == 'R') 152 this.m_flag |= MREAD; 153 else if (c == 'O') 154 this.m_flag &= ~MNEW; 155 inhead = 0; 156 break; 157 } 158 if (*cp != c && *cp != toupper(c)) 159 break; 160 } 161 } 162 offset += count; 163 this.m_size += count; 164 this.m_lines++; 165 maybe = linebuf[0] == 0; 166 } 167 } 168 169 /* 170 * Drop the passed line onto the passed output buffer. 171 * If a write error occurs, return -1, else the count of 172 * characters written, including the newline if requested. 173 */ 174 int 175 putline(obuf, linebuf, outlf) 176 FILE *obuf; 177 char *linebuf; 178 int outlf; 179 { 180 int c; 181 182 c = strlen(linebuf); 183 (void) fwrite(linebuf, sizeof *linebuf, c, obuf); 184 if (outlf) { 185 (void) putc('\n', obuf); 186 c++; 187 } 188 if (ferror(obuf)) 189 return (-1); 190 return (c); 191 } 192 193 /* 194 * Read up a line from the specified input into the line 195 * buffer. Return the number of characters read. Do not 196 * include the newline at the end. 197 */ 198 int 199 readline(ibuf, linebuf, linesize) 200 FILE *ibuf; 201 char *linebuf; 202 int linesize; 203 { 204 int n; 205 206 clearerr(ibuf); 207 if (fgets(linebuf, linesize, ibuf) == NULL) 208 return -1; 209 n = strlen(linebuf); 210 if (n > 0 && linebuf[n - 1] == '\n') 211 linebuf[--n] = '\0'; 212 return n; 213 } 214 215 /* 216 * Return a file buffer all ready to read up the 217 * passed message pointer. 218 */ 219 FILE * 220 setinput(mp) 221 struct message *mp; 222 { 223 224 fflush(otf); 225 if (fseek(itf, (long)positionof(mp->m_block, mp->m_offset), 0) < 0) 226 err(1, "fseek"); 227 return (itf); 228 } 229 230 /* 231 * Take the data out of the passed ghost file and toss it into 232 * a dynamically allocated message structure. 233 */ 234 void 235 makemessage(f, omsgCount) 236 FILE *f; 237 int omsgCount; 238 { 239 int size = (msgCount + 1) * sizeof (struct message); 240 struct message *nmessage = realloc(message, size); 241 242 if (nmessage == NULL) 243 err(1, "Insufficient memory for %d messages", msgCount); 244 if (omsgCount == 0 || message == NULL) 245 dot = nmessage; 246 else 247 dot = nmessage + (dot - message); 248 message = nmessage; 249 size -= (omsgCount + 1) * sizeof (struct message); 250 fflush(f); 251 (void) lseek(fileno(f), (off_t)sizeof *message, 0); 252 if (read(fileno(f), (char *) &message[omsgCount], size) != size) 253 errx(1, "Message temporary file corrupted"); 254 message[msgCount].m_size = 0; 255 message[msgCount].m_lines = 0; 256 Fclose(f); 257 } 258 259 /* 260 * Append the passed message descriptor onto the temp file. 261 * If the write fails, return 1, else 0 262 */ 263 int 264 append(mp, f) 265 struct message *mp; 266 FILE *f; 267 { 268 return fwrite((char *) mp, sizeof *mp, 1, f) != 1; 269 } 270 271 /* 272 * Delete a file, but only if the file is a plain file. 273 */ 274 int 275 rm(name) 276 char *name; 277 { 278 struct stat sb; 279 280 if (stat(name, &sb) < 0) 281 return(-1); 282 if (!S_ISREG(sb.st_mode)) { 283 errno = EISDIR; 284 return(-1); 285 } 286 return(unlink(name)); 287 } 288 289 static int sigdepth; /* depth of holdsigs() */ 290 static sigset_t nset, oset; 291 /* 292 * Hold signals SIGHUP, SIGINT, and SIGQUIT. 293 */ 294 void 295 holdsigs() 296 { 297 298 if (sigdepth++ == 0) { 299 sigemptyset(&nset); 300 sigaddset(&nset, SIGHUP); 301 sigaddset(&nset, SIGINT); 302 sigaddset(&nset, SIGQUIT); 303 sigprocmask(SIG_BLOCK, &nset, &oset); 304 } 305 } 306 307 /* 308 * Release signals SIGHUP, SIGINT, and SIGQUIT. 309 */ 310 void 311 relsesigs() 312 { 313 314 if (--sigdepth == 0) 315 sigprocmask(SIG_SETMASK, &oset, NULL); 316 } 317 318 /* 319 * Determine the size of the file possessed by 320 * the passed buffer. 321 */ 322 off_t 323 fsize(iob) 324 FILE *iob; 325 { 326 struct stat sbuf; 327 328 if (fstat(fileno(iob), &sbuf) < 0) 329 return 0; 330 return sbuf.st_size; 331 } 332 333 /* 334 * Evaluate the string given as a new mailbox name. 335 * Supported meta characters: 336 * % for my system mail box 337 * %user for user's system mail box 338 * # for previous file 339 * & invoker's mbox file 340 * +file file in folder directory 341 * any shell meta character 342 * Return the file name as a dynamic string. 343 */ 344 char * 345 expand(name) 346 char *name; 347 { 348 char xname[PATHSIZE]; 349 char cmdbuf[PATHSIZE]; /* also used for file names */ 350 int pid, l; 351 char *cp, *shell; 352 int pivec[2]; 353 struct stat sbuf; 354 355 /* 356 * The order of evaluation is "%" and "#" expand into constants. 357 * "&" can expand into "+". "+" can expand into shell meta characters. 358 * Shell meta characters expand into constants. 359 * This way, we make no recursive expansion. 360 */ 361 switch (*name) { 362 case '%': 363 findmail(name[1] ? name + 1 : myname, xname); 364 return savestr(xname); 365 case '#': 366 if (name[1] != 0) 367 break; 368 if (prevfile[0] == 0) { 369 printf("No previous file\n"); 370 return NOSTR; 371 } 372 return savestr(prevfile); 373 case '&': 374 if (name[1] == 0 && (name = value("MBOX")) == NOSTR) 375 name = "~/mbox"; 376 /* fall through */ 377 } 378 if (name[0] == '+' && getfold(cmdbuf) >= 0) { 379 snprintf(xname, PATHSIZE, "%s/%s", cmdbuf, name + 1); 380 name = savestr(xname); 381 } 382 /* catch the most common shell meta character */ 383 if (name[0] == '~' && (name[1] == '/' || name[1] == '\0')) { 384 snprintf(xname, PATHSIZE, "%s%s", homedir, name + 1); 385 name = savestr(xname); 386 } 387 if (!anyof(name, "~{[*?$`'\"\\")) 388 return name; 389 if (pipe(pivec) < 0) { 390 perror("pipe"); 391 return name; 392 } 393 snprintf(cmdbuf, PATHSIZE, "echo %s", name); 394 if ((shell = value("SHELL")) == NOSTR) 395 shell = _PATH_CSHELL; 396 pid = start_command(shell, 0, -1, pivec[1], "-c", cmdbuf, NOSTR); 397 if (pid < 0) { 398 close(pivec[0]); 399 close(pivec[1]); 400 return NOSTR; 401 } 402 close(pivec[1]); 403 l = read(pivec[0], xname, PATHSIZE); 404 close(pivec[0]); 405 if (wait_child(pid) < 0 && WTERMSIG(wait_status) != SIGPIPE) { 406 fprintf(stderr, "\"%s\": Expansion failed.\n", name); 407 return NOSTR; 408 } 409 if (l < 0) { 410 perror("read"); 411 return NOSTR; 412 } 413 if (l == 0) { 414 fprintf(stderr, "\"%s\": No match.\n", name); 415 return NOSTR; 416 } 417 if (l == PATHSIZE) { 418 fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name); 419 return NOSTR; 420 } 421 xname[l] = '\0'; 422 for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--) 423 ; 424 cp[1] = '\0'; 425 if (strchr(xname, ' ') && stat(xname, &sbuf) < 0) { 426 fprintf(stderr, "\"%s\": Ambiguous.\n", name); 427 return NOSTR; 428 } 429 return savestr(xname); 430 } 431 432 /* 433 * Determine the current folder directory name. 434 */ 435 int 436 getfold(name) 437 char *name; 438 { 439 char *folder; 440 441 if ((folder = value("folder")) == NOSTR) 442 return (-1); 443 if (*folder == '/') { 444 strncpy(name, folder, PATHSIZE - 1); 445 name[PATHSIZE - 1] = '\0' ; 446 } 447 else 448 snprintf(name, PATHSIZE, "%s/%s", homedir, folder); 449 return (0); 450 } 451 452 /* 453 * Return the name of the dead.letter file. 454 */ 455 char * 456 getdeadletter() 457 { 458 char *cp; 459 460 if ((cp = value("DEAD")) == NOSTR || (cp = expand(cp)) == NOSTR) 461 cp = expand("~/dead.letter"); 462 else if (*cp != '/') { 463 char buf[PATHSIZE]; 464 465 (void) snprintf(buf, PATHSIZE, "~/%s", cp); 466 cp = expand(buf); 467 } 468 return cp; 469 } 470
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