1 /* 2 * at.c : Put file into atrun queue 3 * Copyright (C) 1993, 1994 Thomas Koenig 4 * 5 * Atrun & Atq modifications 6 * Copyright (C) 1993 David Parsons 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. The name of the author(s) may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.bin/at/at.c,v 1.30 2007/09/21 01:55:11 kevlo Exp $ 29 */ 30 31 #define _USE_BSD 1 32 33 /* System Headers */ 34 35 #include <sys/param.h> 36 #include <sys/stat.h> 37 #include <sys/time.h> 38 #include <sys/wait.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <langinfo.h> 45 #include <locale.h> 46 #include <pwd.h> 47 #include <signal.h> 48 #include <stddef.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <time.h> 53 #include <unistd.h> 54 55 /* Local headers */ 56 57 #include "at.h" 58 #include "panic.h" 59 #include "parsetime.h" 60 #include "perm.h" 61 62 #define MAIN 63 #include "privs.h" 64 65 /* Macros */ 66 67 #ifndef ATJOB_DIR 68 #define ATJOB_DIR "/usr/spool/atjobs/" 69 #endif 70 71 #ifndef LFILE 72 #define LFILE ATJOB_DIR ".lockfile" 73 #endif 74 75 #ifndef ATJOB_MX 76 #define ATJOB_MX 255 77 #endif 78 79 #define ALARMC 10 /* Number of seconds to wait for timeout */ 80 81 #define SIZE 255 82 #define TIMESIZE 50 83 84 enum { ATQ, ATRM, AT, BATCH, CAT }; /* what program we want to run */ 85 86 /* File scope variables */ 87 88 const char *no_export[] = 89 { 90 "TERM", "TERMCAP", "DISPLAY", "_" 91 } ; 92 static int send_mail = 0; 93 94 /* External variables */ 95 uid_t real_uid, effective_uid; 96 gid_t real_gid, effective_gid; 97 98 extern char **environ; 99 int fcreated; 100 char atfile[sizeof(ATJOB_DIR) + 14] = ATJOB_DIR; 101 102 char *atinput = NULL; /* where to get input from */ 103 char atqueue = 0; /* which queue to examine for jobs (atq) */ 104 char atverify = 0; /* verify time instead of queuing job */ 105 char *namep; 106 107 /* Function declarations */ 108 109 static void sigc(int signo); 110 static void alarmc(int signo); 111 static char *cwdname(void); 112 static void writefile(time_t runtimer, char queue); 113 static void list_jobs(long *, int); 114 static long nextjob(void); 115 static time_t ttime(const char *arg); 116 static char * timer2str(time_t runtimer); 117 static int in_job_list(long, long *, int); 118 static long *get_job_list(int, char *[], int *); 119 120 /* Signal catching functions */ 121 122 static void 123 sigc(int signo __unused) 124 { 125 /* If the user presses ^C, remove the spool file and exit 126 */ 127 if (fcreated) 128 { 129 PRIV_START 130 unlink(atfile); 131 PRIV_END 132 } 133 134 _exit(EXIT_FAILURE); 135 } 136 137 static void 138 alarmc(int signo __unused) 139 { 140 char buf[1024]; 141 142 /* Time out after some seconds. */ 143 strlcpy(buf, namep, sizeof(buf)); 144 strlcat(buf, ": file locking timed out\n", sizeof(buf)); 145 write(STDERR_FILENO, buf, strlen(buf)); 146 sigc(0); 147 } 148 149 /* Local functions */ 150 151 static char * 152 cwdname(void) 153 { 154 /* Read in the current directory; the name will be overwritten on 155 * subsequent calls. 156 */ 157 static char *ptr = NULL; 158 static size_t size = SIZE; 159 160 if (ptr == NULL) 161 if ((ptr = malloc(size)) == NULL) 162 errx(EXIT_FAILURE, "virtual memory exhausted"); 163 164 while (1) 165 { 166 if (ptr == NULL) 167 panic("out of memory"); 168 169 if (getcwd(ptr, size-1) != NULL) 170 return ptr; 171 172 if (errno != ERANGE) 173 perr("cannot get directory"); 174 175 free (ptr); 176 size += SIZE; 177 if ((ptr = malloc(size)) == NULL) 178 errx(EXIT_FAILURE, "virtual memory exhausted"); 179 } 180 } 181 182 static long 183 nextjob(void) 184 { 185 long jobno; 186 FILE *fid; 187 188 if ((fid = fopen(ATJOB_DIR ".SEQ", "r+")) != NULL) { 189 if (fscanf(fid, "%5lx", &jobno) == 1) { 190 rewind(fid); 191 jobno = (1+jobno) % 0xfffff; /* 2^20 jobs enough? */ 192 fprintf(fid, "%05lx\n", jobno); 193 } 194 else 195 jobno = EOF; 196 fclose(fid); 197 return jobno; 198 } 199 else if ((fid = fopen(ATJOB_DIR ".SEQ", "w")) != NULL) { 200 fprintf(fid, "%05lx\n", jobno = 1); 201 fclose(fid); 202 return 1; 203 } 204 return EOF; 205 } 206 207 static void 208 writefile(time_t runtimer, char queue) 209 { 210 /* This does most of the work if at or batch are invoked for writing a job. 211 */ 212 long jobno; 213 char *ap, *ppos, *mailname; 214 struct passwd *pass_entry; 215 struct stat statbuf; 216 int fdes, lockdes, fd2; 217 FILE *fp, *fpin; 218 struct sigaction act; 219 char **atenv; 220 int ch; 221 mode_t cmask; 222 struct flock lock; 223 224 setlocale(LC_TIME, ""); 225 226 /* Install the signal handler for SIGINT; terminate after removing the 227 * spool file if necessary 228 */ 229 act.sa_handler = sigc; 230 sigemptyset(&(act.sa_mask)); 231 act.sa_flags = 0; 232 233 sigaction(SIGINT, &act, NULL); 234 235 /* Loop over all possible file names for running something at this 236 * particular time, see if a file is there; the first empty slot at any 237 * particular time is used. Lock the file LFILE first to make sure 238 * we're alone when doing this. 239 */ 240 241 PRIV_START 242 243 if ((lockdes = open(LFILE, O_WRONLY | O_CREAT, S_IWUSR | S_IRUSR)) < 0) 244 perr("cannot open lockfile " LFILE); 245 246 lock.l_type = F_WRLCK; lock.l_whence = SEEK_SET; lock.l_start = 0; 247 lock.l_len = 0; 248 249 act.sa_handler = alarmc; 250 sigemptyset(&(act.sa_mask)); 251 act.sa_flags = 0; 252 253 /* Set an alarm so a timeout occurs after ALARMC seconds, in case 254 * something is seriously broken. 255 */ 256 sigaction(SIGALRM, &act, NULL); 257 alarm(ALARMC); 258 fcntl(lockdes, F_SETLKW, &lock); 259 alarm(0); 260 261 if ((jobno = nextjob()) == EOF) 262 perr("cannot generate job number"); 263 264 ppos = atfile + strlen(atfile); 265 snprintf(ppos, sizeof(atfile) - strlen(atfile), "%c%5lx%8lx", queue, 266 jobno, (unsigned long) (runtimer/60)); 267 268 for(ap=ppos; *ap != '\0'; ap ++) 269 if (*ap == ' ') 270 *ap = '0'; 271 272 if (stat(atfile, &statbuf) != 0) 273 if (errno != ENOENT) 274 perr("cannot access " ATJOB_DIR); 275 276 /* Create the file. The x bit is only going to be set after it has 277 * been completely written out, to make sure it is not executed in the 278 * meantime. To make sure they do not get deleted, turn off their r 279 * bit. Yes, this is a kluge. 280 */ 281 cmask = umask(S_IRUSR | S_IWUSR | S_IXUSR); 282 if ((fdes = creat(atfile, O_WRONLY)) == -1) 283 perr("cannot create atjob file"); 284 285 if ((fd2 = dup(fdes)) <0) 286 perr("error in dup() of job file"); 287 288 if(fchown(fd2, real_uid, real_gid) != 0) 289 perr("cannot give away file"); 290 291 PRIV_END 292 293 /* We no longer need suid root; now we just need to be able to write 294 * to the directory, if necessary. 295 */ 296 297 REDUCE_PRIV(DAEMON_UID, DAEMON_GID) 298 299 /* We've successfully created the file; let's set the flag so it 300 * gets removed in case of an interrupt or error. 301 */ 302 fcreated = 1; 303 304 /* Now we can release the lock, so other people can access it 305 */ 306 lock.l_type = F_UNLCK; lock.l_whence = SEEK_SET; lock.l_start = 0; 307 lock.l_len = 0; 308 fcntl(lockdes, F_SETLKW, &lock); 309 close(lockdes); 310 311 if((fp = fdopen(fdes, "w")) == NULL) 312 panic("cannot reopen atjob file"); 313 314 /* Get the userid to mail to, first by trying getlogin(), 315 * then from LOGNAME, finally from getpwuid(). 316 */ 317 mailname = getlogin(); 318 if (mailname == NULL) 319 mailname = getenv("LOGNAME"); 320 321 if ((mailname == NULL) || (mailname[0] == '\0') 322 || (strlen(mailname) >= MAXLOGNAME) || (getpwnam(mailname)==NULL)) 323 { 324 pass_entry = getpwuid(real_uid); 325 if (pass_entry != NULL) 326 mailname = pass_entry->pw_name; 327 } 328 329 if (atinput != NULL) 330 { 331 fpin = freopen(atinput, "r", stdin); 332 if (fpin == NULL) 333 perr("cannot open input file"); 334 } 335 fprintf(fp, "#!/bin/sh\n# atrun uid=%ld gid=%ld\n# mail %*s %d\n", 336 (long) real_uid, (long) real_gid, MAXLOGNAME - 1, mailname, 337 send_mail); 338 339 /* Write out the umask at the time of invocation 340 */ 341 fprintf(fp, "umask %lo\n", (unsigned long) cmask); 342 343 /* Write out the environment. Anything that may look like a 344 * special character to the shell is quoted, except for \n, which is 345 * done with a pair of "'s. Don't export the no_export list (such 346 * as TERM or DISPLAY) because we don't want these. 347 */ 348 for (atenv= environ; *atenv != NULL; atenv++) 349 { 350 int export = 1; 351 char *eqp; 352 353 eqp = strchr(*atenv, '='); 354 if (ap == NULL) 355 eqp = *atenv; 356 else 357 { 358 size_t i; 359 for (i=0; i<NELEM(no_export); i++) 360 { 361 export = export 362 && (strncmp(*atenv, no_export[i], 363 (size_t) (eqp-*atenv)) != 0); 364 } 365 eqp++; 366 } 367 368 if (export) 369 { 370 fwrite(*atenv, sizeof(char), eqp-*atenv, fp); 371 for(ap = eqp;*ap != '\0'; ap++) 372 { 373 if (*ap == '\n') 374 fprintf(fp, "\"\n\""); 375 else 376 { 377 if (!isalnum(*ap)) { 378 switch (*ap) { 379 case '%': case '/': case '{': case '[': 380 case ']': case '=': case '}': case '@': 381 case '+': case '#': case ',': case '.': 382 case ':': case '-': case '_': 383 break; 384 default: 385 fputc('\\', fp); 386 break; 387 } 388 } 389 fputc(*ap, fp); 390 } 391 } 392 fputs("; export ", fp); 393 fwrite(*atenv, sizeof(char), eqp-*atenv -1, fp); 394 fputc('\n', fp); 395 396 } 397 } 398 /* Cd to the directory at the time and write out all the 399 * commands the user supplies from stdin. 400 */ 401 fprintf(fp, "cd "); 402 for (ap = cwdname(); *ap != '\0'; ap++) 403 { 404 if (*ap == '\n') 405 fprintf(fp, "\"\n\""); 406 else 407 { 408 if (*ap != '/' && !isalnum(*ap)) 409 fputc('\\', fp); 410 411 fputc(*ap, fp); 412 } 413 } 414 /* Test cd's exit status: die if the original directory has been 415 * removed, become unreadable or whatever 416 */ 417 fprintf(fp, " || {\n\t echo 'Execution directory " 418 "inaccessible' >&2\n\t exit 1\n}\n"); 419 420 while((ch = getchar()) != EOF) 421 fputc(ch, fp); 422 423 fprintf(fp, "\n"); 424 if (ferror(fp)) 425 panic("output error"); 426 427 if (ferror(stdin)) 428 panic("input error"); 429 430 fclose(fp); 431 432 /* Set the x bit so that we're ready to start executing 433 */ 434 435 if (fchmod(fd2, S_IRUSR | S_IWUSR | S_IXUSR) < 0) 436 perr("cannot give away file"); 437 438 close(fd2); 439 440 /* Print output. */ 441 char *timestr = timer2str(runtimer); 442 443 fprintf(stderr, "Job %ld will be executed using /bin/sh\n", jobno); 444 fprintf(stderr, "Job %ld at %s\n", jobno, timestr); 445 free(timestr); 446 } 447 448 static int 449 in_job_list(long job, long *joblist, int len) 450 { 451 int i; 452 453 for (i = 0; i < len; i++) 454 if (job == joblist[i]) 455 return 1; 456 457 return 0; 458 } 459 460 static void 461 list_jobs(long *joblist, int len) 462 { 463 /* List all a user's jobs in the queue, by looping through ATJOB_DIR, 464 * or everybody's if we are root 465 */ 466 struct passwd *pw; 467 DIR *spool; 468 struct dirent *dirent; 469 struct stat buf; 470 unsigned long ctm; 471 char queue; 472 long jobno; 473 time_t runtimer; 474 char *timestr; 475 int first=1; 476 477 setlocale(LC_TIME, ""); 478 479 PRIV_START 480 481 if (chdir(ATJOB_DIR) != 0) 482 perr("cannot change to " ATJOB_DIR); 483 484 if ((spool = opendir(".")) == NULL) 485 perr("cannot open " ATJOB_DIR); 486 487 /* Loop over every file in the directory 488 */ 489 while((dirent = readdir(spool)) != NULL) { 490 if (stat(dirent->d_name, &buf) != 0) 491 perr("cannot stat in " ATJOB_DIR); 492 493 /* See it's a regular file and has its x bit turned on and 494 * is the user's 495 */ 496 if (!S_ISREG(buf.st_mode) 497 || ((buf.st_uid != real_uid) && ! (real_uid == 0)) 498 || !(S_IXUSR & buf.st_mode || atverify)) 499 continue; 500 501 if(sscanf(dirent->d_name, "%c%5lx%8lx", &queue, &jobno, &ctm)!=3) 502 continue; 503 504 /* If jobs are given, only list those jobs */ 505 if (joblist && !in_job_list(jobno, joblist, len)) 506 continue; 507 508 if (atqueue && (queue != atqueue)) 509 continue; 510 511 /* Get datetime */ 512 runtimer = 60*(time_t) ctm; 513 timestr = timer2str(runtimer); 514 515 /* Look up owner's uid in password database file */ 516 pw = getpwuid(buf.st_uid); 517 518 if (first) { 519 printf("Date\t\t\t\tOwner\t\tQueue\tJob#\n"); 520 first=0; 521 } 522 printf("%s\t%-16s%c%s\t%ld\n", 523 timestr, 524 pw ? pw->pw_name : "???", 525 queue, 526 (S_IXUSR & buf.st_mode) ? "":"(done)", 527 jobno); 528 free(timestr); 529 } 530 closedir(spool); 531 532 PRIV_END 533 } 534 535 static void 536 process_jobs(int argc, char **argv, int what) 537 { 538 /* Delete every argument (job - ID) given 539 */ 540 int i; 541 struct stat buf; 542 DIR *spool; 543 struct dirent *dirent; 544 unsigned long ctm; 545 char queue; 546 long jobno; 547 548 PRIV_START 549 550 if (chdir(ATJOB_DIR) != 0) 551 perr("cannot change to " ATJOB_DIR); 552 553 if ((spool = opendir(".")) == NULL) 554 perr("cannot open " ATJOB_DIR); 555 556 PRIV_END 557 558 /* Loop over every file in the directory 559 */ 560 while((dirent = readdir(spool)) != NULL) { 561 562 PRIV_START 563 if (stat(dirent->d_name, &buf) != 0) 564 perr("cannot stat in " ATJOB_DIR); 565 PRIV_END 566 567 if(sscanf(dirent->d_name, "%c%5lx%8lx", &queue, &jobno, &ctm)!=3) 568 continue; 569 570 for (i=optind; i < argc; i++) { 571 if (atoi(argv[i]) == jobno) { 572 if ((buf.st_uid != real_uid) && !(real_uid == 0)) 573 errx(EXIT_FAILURE, "%s: not owner", argv[i]); 574 switch (what) { 575 case ATRM: 576 577 PRIV_START 578 579 if (unlink(dirent->d_name) != 0) 580 perr(dirent->d_name); 581 582 PRIV_END 583 584 break; 585 586 case CAT: 587 { 588 FILE *fp; 589 int ch; 590 591 PRIV_START 592 593 fp = fopen(dirent->d_name,"r"); 594 595 PRIV_END 596 597 if (!fp) { 598 perr("cannot open file"); 599 } 600 while((ch = getc(fp)) != EOF) { 601 putchar(ch); 602 } 603 fclose(fp); 604 } 605 break; 606 607 default: 608 errx(EXIT_FAILURE, "internal error, process_jobs = %d", 609 what); 610 } 611 } 612 } 613 } 614 closedir(spool); 615 } /* delete_jobs */ 616 617 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 618 619 static time_t 620 ttime(const char *arg) 621 { 622 /* 623 * This is pretty much a copy of stime_arg1() from touch.c. I changed 624 * the return value and the argument list because it's more convenient 625 * (IMO) to do everything in one place. - Joe Halpin 626 */ 627 struct timeval tv[2]; 628 time_t now; 629 struct tm *t; 630 int yearset; 631 char *p; 632 633 if (gettimeofday(&tv[0], NULL)) 634 panic("Cannot get current time"); 635 636 /* Start with the current time. */ 637 now = tv[0].tv_sec; 638 if ((t = localtime(&now)) == NULL) 639 panic("localtime"); 640 /* [[CC]YY]MMDDhhmm[.SS] */ 641 if ((p = strchr(arg, '.')) == NULL) 642 t->tm_sec = 0; /* Seconds defaults to 0. */ 643 else { 644 if (strlen(p + 1) != 2) 645 goto terr; 646 *p++ = '\0'; 647 t->tm_sec = ATOI2(p); 648 } 649 650 yearset = 0; 651 switch(strlen(arg)) { 652 case 12: /* CCYYMMDDhhmm */ 653 t->tm_year = ATOI2(arg); 654 t->tm_year *= 100; 655 yearset = 1; 656 /* FALLTHROUGH */ 657 case 10: /* YYMMDDhhmm */ 658 if (yearset) { 659 yearset = ATOI2(arg); 660 t->tm_year += yearset; 661 } else { 662 yearset = ATOI2(arg); 663 t->tm_year = yearset + 2000; 664 } 665 t->tm_year -= 1900; /* Convert to UNIX time. */ 666 /* FALLTHROUGH */ 667 case 8: /* MMDDhhmm */ 668 t->tm_mon = ATOI2(arg); 669 --t->tm_mon; /* Convert from 01-12 to 00-11 */ 670 t->tm_mday = ATOI2(arg); 671 t->tm_hour = ATOI2(arg); 672 t->tm_min = ATOI2(arg); 673 break; 674 default: 675 goto terr; 676 } 677 678 t->tm_isdst = -1; /* Figure out DST. */ 679 tv[0].tv_sec = tv[1].tv_sec = mktime(t); 680 if (tv[0].tv_sec != -1) 681 return tv[0].tv_sec; 682 else 683 terr: 684 panic( 685 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); 686 } 687 688 /* The caller must free up the memory. */ 689 static char * 690 timer2str(time_t runtimer) 691 { 692 struct tm runtime; 693 char *timestr; 694 size_t rv; 695 696 timestr = malloc(TIMESIZE); 697 if (timestr == NULL) 698 panic("out of memory"); 699 700 runtime = *localtime(&runtimer); 701 rv = strftime(timestr, TIMESIZE, nl_langinfo(D_T_FMT), &runtime); 702 if (rv == 0) 703 panic("TIMESIZE too low"); 704 705 return (timestr); 706 } 707 708 static long * 709 get_job_list(int argc, char *argv[], int *joblen) 710 { 711 int i, len; 712 long *joblist; 713 char *ep; 714 715 joblist = NULL; 716 len = argc; 717 if (len > 0) { 718 if ((joblist = malloc(len * sizeof(*joblist))) == NULL) 719 panic("out of memory"); 720 721 for (i = 0; i < argc; i++) { 722 errno = 0; 723 if ((joblist[i] = strtol(argv[i], &ep, 10)) < 0 || 724 ep == argv[i] || *ep != '\0' || errno) 725 panic("invalid job number"); 726 } 727 } 728 729 *joblen = len; 730 return joblist; 731 } 732 733 int 734 main(int argc, char **argv) 735 { 736 int c; 737 char queue = DEFAULT_AT_QUEUE; 738 char queue_set = 0; 739 char *pgm; 740 741 int program = AT; /* our default program */ 742 const char *options = "q:f:t:rmvldbc"; /* default options for at */ 743 time_t timer; 744 long *joblist; 745 int joblen; 746 747 joblist = NULL; 748 joblen = 0; 749 timer = -1; 750 RELINQUISH_PRIVS 751 752 /* Eat any leading paths 753 */ 754 if ((pgm = strrchr(argv[0], '/')) == NULL) 755 pgm = argv[0]; 756 else 757 pgm++; 758 759 namep = pgm; 760 761 /* find out what this program is supposed to do 762 */ 763 if (strcmp(pgm, "atq") == 0) { 764 program = ATQ; 765 options = "q:v"; 766 } 767 else if (strcmp(pgm, "atrm") == 0) { 768 program = ATRM; 769 options = ""; 770 } 771 else if (strcmp(pgm, "batch") == 0) { 772 program = BATCH; 773 options = "f:q:mv"; 774 } 775 776 /* process whatever options we can process 777 */ 778 opterr=1; 779 while ((c=getopt(argc, argv, options)) != -1) 780 switch (c) { 781 case 'v': /* verify time settings */ 782 atverify = 1; 783 break; 784 785 case 'm': /* send mail when job is complete */ 786 send_mail = 1; 787 break; 788 789 case 'f': 790 atinput = optarg; 791 break; 792 793 case 'q': /* specify queue */ 794 if (strlen(optarg) > 1) 795 usage(); 796 797 atqueue = queue = *optarg; 798 if (!(islower(queue)||isupper(queue))) 799 usage(); 800 801 queue_set = 1; 802 break; 803 804 case 'd': 805 warnx("-d is deprecated; use -r instead"); 806 /* FALLTHROUGH */ 807 808 case 'r': 809 if (program != AT) 810 usage(); 811 812 program = ATRM; 813 options = ""; 814 break; 815 816 case 't': 817 if (program != AT) 818 usage(); 819 timer = ttime(optarg); 820 break; 821 822 case 'l': 823 if (program != AT) 824 usage(); 825 826 program = ATQ; 827 options = "q:"; 828 break; 829 830 case 'b': 831 if (program != AT) 832 usage(); 833 834 program = BATCH; 835 options = "f:q:mv"; 836 break; 837 838 case 'c': 839 program = CAT; 840 options = ""; 841 break; 842 843 default: 844 usage(); 845 break; 846 } 847 /* end of options eating 848 */ 849 850 /* select our program 851 */ 852 if(!check_permission()) 853 errx(EXIT_FAILURE, "you do not have permission to use this program"); 854 switch (program) { 855 case ATQ: 856 857 REDUCE_PRIV(DAEMON_UID, DAEMON_GID) 858 859 if (queue_set == 0) 860 joblist = get_job_list(argc - optind, argv + optind, &joblen); 861 list_jobs(joblist, joblen); 862 break; 863 864 case ATRM: 865 866 REDUCE_PRIV(DAEMON_UID, DAEMON_GID) 867 868 process_jobs(argc, argv, ATRM); 869 break; 870 871 case CAT: 872 873 process_jobs(argc, argv, CAT); 874 break; 875 876 case AT: 877 /* 878 * If timer is > -1, then the user gave the time with -t. In that 879 * case, it's already been set. If not, set it now. 880 */ 881 if (timer == -1) 882 timer = parsetime(argc, argv); 883 884 if (atverify) 885 { 886 struct tm *tm = localtime(&timer); 887 fprintf(stderr, "%s\n", asctime(tm)); 888 } 889 writefile(timer, queue); 890 break; 891 892 case BATCH: 893 if (queue_set) 894 queue = toupper(queue); 895 else 896 queue = DEFAULT_BATCH_QUEUE; 897 898 if (argc > optind) 899 timer = parsetime(argc, argv); 900 else 901 timer = time(NULL); 902 903 if (atverify) 904 { 905 struct tm *tm = localtime(&timer); 906 fprintf(stderr, "%s\n", asctime(tm)); 907 } 908 909 writefile(timer, queue); 910 break; 911 912 default: 913 panic("internal error"); 914 break; 915 } 916 exit(EXIT_SUCCESS); 917 } 918