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1.11 ! millert 1: /* $OpenBSD: at.c,v 1.10 1997/03/03 03:31:10 millert Exp $ */
1.1 deraadt 2: /* $NetBSD: at.c,v 1.4 1995/03/25 18:13:31 glass Exp $ */
3:
4: /*
1.7 millert 5: * at.c : Put file into atrun queue
6: * Copyright (C) 1993, 1994 Thomas Koenig
1.1 deraadt 7: *
1.7 millert 8: * Atrun & Atq modifications
9: * Copyright (C) 1993 David Parsons
1.1 deraadt 10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. The name of the author(s) may not be used to endorse or promote
17: * products derived from this software without specific prior written
18: * permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1.7 millert 23: * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
1.1 deraadt 24: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27: * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: /* System Headers */
33: #include <sys/types.h>
1.7 millert 34: #include <sys/param.h>
1.1 deraadt 35: #include <sys/stat.h>
36: #include <sys/wait.h>
37: #include <ctype.h>
38: #include <dirent.h>
39: #include <errno.h>
40: #include <fcntl.h>
41: #include <pwd.h>
42: #include <signal.h>
43: #include <stddef.h>
44: #include <stdio.h>
45: #include <stdlib.h>
46: #include <string.h>
47: #include <time.h>
48: #include <unistd.h>
1.7 millert 49: #include <utmp.h>
50: #include <locale.h>
51:
52: #if (MAXLOGNAME-1) > UT_NAMESIZE
53: #define LOGNAMESIZE UT_NAMESIZE
54: #else
55: #define LOGNAMESIZE (MAXLOGNAME-1)
56: #endif
1.1 deraadt 57:
58: /* Local headers */
59: #include "at.h"
60: #include "panic.h"
61: #include "parsetime.h"
1.7 millert 62: #include "perm.h"
1.1 deraadt 63: #include "pathnames.h"
64: #define MAIN
65: #include "privs.h"
66:
67: /* Macros */
68: #define ALARMC 10 /* Number of seconds to wait for timeout */
69:
70: #define TIMESIZE 50
71:
1.7 millert 72: enum { ATQ, ATRM, AT, BATCH, CAT }; /* what program we want to run */
73:
1.1 deraadt 74: /* File scope variables */
75: #ifndef lint
1.11 ! millert 76: static char rcsid[] = "$OpenBSD: at.c,v 1.10 1997/03/03 03:31:10 millert Exp $";
1.1 deraadt 77: #endif
78:
79: char *no_export[] =
80: {
81: "TERM", "TERMCAP", "DISPLAY", "_"
82: };
83: static send_mail = 0;
84:
85: /* External variables */
1.7 millert 86:
1.1 deraadt 87: extern char **environ;
88: int fcreated;
89: char *namep;
90: char atfile[FILENAME_MAX];
91:
1.7 millert 92: char *atinput = (char *)0; /* where to get input from */
1.1 deraadt 93: char atqueue = 0; /* which queue to examine for jobs (atq) */
94: char atverify = 0; /* verify time instead of queuing job */
95:
96: /* Function declarations */
1.7 millert 97:
98: static void sigc __P((int));
99: static void alarmc __P((int));
1.1 deraadt 100: static char *cwdname __P((void));
1.7 millert 101: static void writefile __P((time_t, char));
1.1 deraadt 102: static void list_jobs __P((void));
103:
104: /* Signal catching functions */
105:
106: static void
107: sigc(signo)
108: int signo;
109: {
1.7 millert 110: /* If the user presses ^C, remove the spool file and exit. */
1.1 deraadt 111: if (fcreated) {
112: PRIV_START
1.7 millert 113: (void)unlink(atfile);
1.1 deraadt 114: PRIV_END
115: }
116:
117: exit(EXIT_FAILURE);
118: }
119:
120: static void
121: alarmc(signo)
122: int signo;
123: {
1.7 millert 124: /* Time out after some seconds. */
1.1 deraadt 125: panic("File locking timed out");
126: }
127:
128: /* Local functions */
129:
130: static char *
131: cwdname()
132: {
1.7 millert 133: /*
134: * Read in the current directory; the name will be overwritten on
135: * subsequent calls.
136: */
137: static char path[MAXPATHLEN];
1.1 deraadt 138:
1.7 millert 139: return (getcwd(path, sizeof(path)));
140: }
1.1 deraadt 141:
1.7 millert 142: static int
143: nextjob()
144: {
145: int jobno;
146: FILE *fid;
1.1 deraadt 147:
1.7 millert 148: if ((fid = fopen(_PATH_SEQFILE, "r+")) != (FILE*)0) {
149: if (fscanf(fid, "%5x", &jobno) == 1) {
150: (void)rewind(fid);
151: jobno = (1+jobno) % 0xfffff; /* 2^20 jobs enough? */
152: (void)fprintf(fid, "%05x\n", jobno);
153: } else
154: jobno = EOF;
155: (void)fclose(fid);
156: return (jobno);
157: } else if ((fid = fopen(_PATH_SEQFILE, "w")) != (FILE*)0) {
158: (void)fprintf(fid, "%05x\n", jobno = 1);
159: (void)fclose(fid);
160: return (1);
1.1 deraadt 161: }
1.7 millert 162: return (EOF);
1.1 deraadt 163: }
164:
165: static void
166: writefile(runtimer, queue)
167: time_t runtimer;
168: char queue;
169: {
170: /*
171: * This does most of the work if at or batch are invoked for
172: * writing a job.
173: */
1.7 millert 174: int jobno;
1.1 deraadt 175: char *ap, *ppos, *mailname;
176: struct passwd *pass_entry;
177: struct stat statbuf;
178: int fdes, lockdes, fd2;
179: FILE *fp, *fpin;
180: struct sigaction act;
181: char **atenv;
182: int ch;
183: mode_t cmask;
184: struct flock lock;
185:
1.7 millert 186: (void)setlocale(LC_TIME, "");
187:
1.1 deraadt 188: /*
189: * Install the signal handler for SIGINT; terminate after removing the
190: * spool file if necessary
191: */
192: act.sa_handler = sigc;
193: sigemptyset(&(act.sa_mask));
194: act.sa_flags = 0;
195:
196: sigaction(SIGINT, &act, NULL);
197:
1.7 millert 198: (void)strcpy(atfile, _PATH_ATJOBS);
199: ppos = atfile + strlen(atfile);
1.1 deraadt 200:
201: /*
202: * Loop over all possible file names for running something at this
1.7 millert 203: * particular time, see if a file is there; the first empty slot at
204: * any particular time is used. Lock the file _PATH_LOCKFILE first
205: * to make sure we're alone when doing this.
1.1 deraadt 206: */
207:
208: PRIV_START
209:
1.7 millert 210: if ((lockdes = open(_PATH_LOCKFILE, O_WRONLY | O_CREAT, S_IWUSR | S_IRUSR)) < 0)
1.1 deraadt 211: perr2("Cannot open lockfile ", _PATH_LOCKFILE);
212:
213: lock.l_type = F_WRLCK;
214: lock.l_whence = SEEK_SET;
215: lock.l_start = 0;
216: lock.l_len = 0;
217:
218: act.sa_handler = alarmc;
219: sigemptyset(&(act.sa_mask));
220: act.sa_flags = 0;
221:
222: /*
223: * Set an alarm so a timeout occurs after ALARMC seconds, in case
224: * something is seriously broken.
225: */
226: sigaction(SIGALRM, &act, NULL);
227: alarm(ALARMC);
228: fcntl(lockdes, F_SETLKW, &lock);
229: alarm(0);
230:
1.7 millert 231: if ((jobno = nextjob()) == EOF)
232: perr("Cannot generate job number");
233:
1.8 millert 234: (void)snprintf(ppos, sizeof(atfile) - (ppos - atfile),
235: "%c%5x%8x", queue, jobno, (unsigned) (runtimer/60));
1.1 deraadt 236:
1.7 millert 237: for (ap = ppos; *ap != '\0'; ap++)
238: if (*ap == ' ')
239: *ap = '0';
240:
241: if (stat(atfile, &statbuf) != 0)
242: if (errno != ENOENT)
243: perr2("Cannot access ", _PATH_ATJOBS);
1.1 deraadt 244:
245: /*
246: * Create the file. The x bit is only going to be set after it has
247: * been completely written out, to make sure it is not executed in
248: * the meantime. To make sure they do not get deleted, turn off
249: * their r bit. Yes, this is a kluge.
250: */
251: cmask = umask(S_IRUSR | S_IWUSR | S_IXUSR);
1.8 millert 252: if ((fdes = open(atfile, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR)) == -1)
1.1 deraadt 253: perr("Cannot create atjob file");
254:
255: if ((fd2 = dup(fdes)) < 0)
256: perr("Error in dup() of job file");
257:
1.7 millert 258: if (fchown(fd2, real_uid, real_gid) != 0)
1.1 deraadt 259: perr("Cannot give away file");
260:
261: PRIV_END
262:
263: /*
264: * We've successfully created the file; let's set the flag so it
265: * gets removed in case of an interrupt or error.
266: */
267: fcreated = 1;
268:
269: /* Now we can release the lock, so other people can access it */
270: lock.l_type = F_UNLCK;
271: lock.l_whence = SEEK_SET;
272: lock.l_start = 0;
273: lock.l_len = 0;
1.7 millert 274: (void)fcntl(lockdes, F_SETLKW, &lock);
275: (void)close(lockdes);
1.1 deraadt 276:
277: if ((fp = fdopen(fdes, "w")) == NULL)
278: panic("Cannot reopen atjob file");
279:
280: /*
1.5 millert 281: * Get the userid to mail to, first by trying getlogin(), which reads
282: * /etc/utmp, then from $LOGNAME or $USER, finally from getpwuid().
1.1 deraadt 283: */
284: mailname = getlogin();
1.5 millert 285: if (mailname == NULL && (mailname = getenv("LOGNAME")) == NULL)
286: mailname = getenv("USER");
1.1 deraadt 287:
1.7 millert 288: if ((mailname == NULL) || (mailname[0] == '\0') ||
289: (strlen(mailname) > LOGNAMESIZE) || (getpwnam(mailname) == NULL)) {
290: pass_entry = getpwuid(real_uid);
1.1 deraadt 291: if (pass_entry != NULL)
292: mailname = pass_entry->pw_name;
293: }
294:
295: if (atinput != (char *) NULL) {
296: fpin = freopen(atinput, "r", stdin);
297: if (fpin == NULL)
298: perr("Cannot open input file");
299: }
1.7 millert 300: (void)fprintf(fp, "#!/bin/sh\n# atrun uid=%u gid=%u\n# mail %*s %d\n",
301: real_uid, real_gid, LOGNAMESIZE, mailname, send_mail);
1.1 deraadt 302:
303: /* Write out the umask at the time of invocation */
1.7 millert 304: (void)fprintf(fp, "umask %o\n", cmask);
1.1 deraadt 305:
306: /*
307: * Write out the environment. Anything that may look like a special
308: * character to the shell is quoted, except for \n, which is done
309: * with a pair of "'s. Dont't export the no_export list (such as
310: * TERM or DISPLAY) because we don't want these.
311: */
312: for (atenv = environ; *atenv != NULL; atenv++) {
313: int export = 1;
314: char *eqp;
315:
316: eqp = strchr(*atenv, '=');
317: if (ap == NULL)
318: eqp = *atenv;
319: else {
320: int i;
321:
322: for (i = 0;i < sizeof(no_export) /
323: sizeof(no_export[0]); i++) {
324: export = export
325: && (strncmp(*atenv, no_export[i],
326: (size_t) (eqp - *atenv)) != 0);
327: }
328: eqp++;
329: }
330:
331: if (export) {
1.7 millert 332: (void)fwrite(*atenv, sizeof(char), eqp - *atenv, fp);
1.1 deraadt 333: for (ap = eqp; *ap != '\0'; ap++) {
334: if (*ap == '\n')
1.7 millert 335: (void)fprintf(fp, "\"\n\"");
1.1 deraadt 336: else {
1.7 millert 337: if (!isalnum(*ap)) {
338: switch (*ap) {
339: case '%': case '/': case '{':
340: case '[': case ']': case '=':
341: case '}': case '@': case '+':
342: case '#': case ',': case '.':
343: case ':': case '-': case '_':
344: break;
345: default:
346: (void)fputc('\\', fp);
347: break;
348: }
349: }
350: (void)fputc(*ap, fp);
1.1 deraadt 351: }
352: }
1.7 millert 353: (void)fputs("; export ", fp);
354: (void)fwrite(*atenv, sizeof(char), eqp - *atenv - 1, fp);
355: (void)fputc('\n', fp);
356: }
357: }
358: /*
359: * Cd to the directory at the time and write out all the
360: * commands the user supplies from stdin.
361: */
362: (void)fputs("cd ", fp);
363: for (ap = cwdname(); *ap != '\0'; ap++) {
364: if (*ap == '\n')
365: fprintf(fp, "\"\n\"");
366: else {
367: if (*ap != '/' && !isalnum(*ap))
368: (void)fputc('\\', fp);
1.1 deraadt 369:
1.7 millert 370: (void)fputc(*ap, fp);
1.1 deraadt 371: }
372: }
373: /*
1.7 millert 374: * Test cd's exit status: die if the original directory has been
375: * removed, become unreadable or whatever.
1.1 deraadt 376: */
1.7 millert 377: (void)fprintf(fp, " || {\n\t echo 'Execution directory inaccessible' >&2\n\t exit 1\n}\n");
1.1 deraadt 378:
1.3 millert 379: if ((ch = getchar()) == EOF)
380: panic("Input error");
381:
382: do {
1.7 millert 383: (void)fputc(ch, fp);
1.3 millert 384: } while ((ch = getchar()) != EOF);
1.1 deraadt 385:
1.7 millert 386: (void)fprintf(fp, "\n");
1.1 deraadt 387: if (ferror(fp))
388: panic("Output error");
389:
390: if (ferror(stdin))
391: panic("Input error");
392:
1.7 millert 393: (void)fclose(fp);
1.1 deraadt 394:
395: /*
396: * Set the x bit so that we're ready to start executing
397: */
398: if (fchmod(fd2, S_IRUSR | S_IWUSR | S_IXUSR) < 0)
399: perr("Cannot give away file");
400:
1.7 millert 401: (void)close(fd2);
402: (void)fprintf(stderr, "Job %d will be executed using /bin/sh\n", jobno);
1.1 deraadt 403: }
404:
405: static void
406: list_jobs()
407: {
408: /*
409: * List all a user's jobs in the queue, by looping through
410: * _PATH_ATJOBS, or everybody's if we are root
411: */
412: struct passwd *pw;
413: DIR *spool;
414: struct dirent *dirent;
415: struct stat buf;
416: struct tm runtime;
417: unsigned long ctm;
418: char queue;
1.7 millert 419: int jobno;
1.1 deraadt 420: time_t runtimer;
421: char timestr[TIMESIZE];
422: int first = 1;
423:
424: PRIV_START
425:
1.7 millert 426: if (chdir(_PATH_ATJOBS) != 0)
1.1 deraadt 427: perr2("Cannot change to ", _PATH_ATJOBS);
428:
429: if ((spool = opendir(".")) == NULL)
430: perr2("Cannot open ", _PATH_ATJOBS);
431:
432: /* Loop over every file in the directory */
433: while ((dirent = readdir(spool)) != NULL) {
434: if (stat(dirent->d_name, &buf) != 0)
435: perr2("Cannot stat in ", _PATH_ATJOBS);
436:
437: /*
438: * See it's a regular file and has its x bit turned on and
439: * is the user's
440: */
441: if (!S_ISREG(buf.st_mode)
442: || ((buf.st_uid != real_uid) && !(real_uid == 0))
443: || !(S_IXUSR & buf.st_mode || atverify))
444: continue;
445:
1.7 millert 446: if (sscanf(dirent->d_name, "%c%5x%8lx", &queue, &jobno, &ctm) != 3)
1.1 deraadt 447: continue;
448:
449: if (atqueue && (queue != atqueue))
450: continue;
451:
452: runtimer = 60 * (time_t) ctm;
453: runtime = *localtime(&runtimer);
454: strftime(timestr, TIMESIZE, "%X %x", &runtime);
455: if (first) {
1.7 millert 456: (void)printf("Date\t\t\tOwner\tQueue\tJob#\n");
1.1 deraadt 457: first = 0;
458: }
459: pw = getpwuid(buf.st_uid);
460:
1.7 millert 461: (void)printf("%s\t%s\t%c%s\t%d\n",
1.1 deraadt 462: timestr,
463: pw ? pw->pw_name : "???",
464: queue,
465: (S_IXUSR & buf.st_mode) ? "" : "(done)",
1.7 millert 466: jobno);
1.1 deraadt 467: }
468: PRIV_END
469: }
470:
471: static void
1.7 millert 472: process_jobs(argc, argv, what)
1.1 deraadt 473: int argc;
474: char **argv;
1.7 millert 475: int what;
1.1 deraadt 476: {
477: /* Delete every argument (job - ID) given */
478: int i;
479: struct stat buf;
1.7 millert 480: DIR *spool;
481: struct dirent *dirent;
482: unsigned long ctm;
483: char queue;
484: int jobno;
1.9 millert 485:
1.1 deraadt 486: PRIV_START
487:
1.7 millert 488: if (chdir(_PATH_ATJOBS) != 0)
1.1 deraadt 489: perr2("Cannot change to ", _PATH_ATJOBS);
490:
1.7 millert 491: if ((spool = opendir(".")) == NULL)
492: perr2("Cannot open ", _PATH_ATJOBS);
493:
494: PRIV_END
495:
496: /* Loop over every file in the directory */
497: while((dirent = readdir(spool)) != NULL) {
498:
499: PRIV_START
500: if (stat(dirent->d_name, &buf) != 0)
501: perr2("Cannot stat in ", _PATH_ATJOBS);
502: PRIV_END
503:
504: if (sscanf(dirent->d_name, "%c%5x%8lx", &queue, &jobno, &ctm) !=3)
505: continue;
506:
507: for (i = optind; i < argc; i++) {
508: if (atoi(argv[i]) == jobno) {
509: if ((buf.st_uid != real_uid) && !(real_uid == 0)) {
510: (void)fprintf(stderr,
511: "%s: Not owner\n", argv[i]);
512: exit(EXIT_FAILURE);
513: }
514: switch (what) {
515: case ATRM:
516: PRIV_START
517:
518: if (unlink(dirent->d_name) != 0)
519: perr(dirent->d_name);
520:
521: PRIV_END
522:
523: break;
524:
525: case CAT:
526: {
527: FILE *fp;
528: int ch;
529:
530: PRIV_START
531:
532: fp = fopen(dirent->d_name, "r");
533:
534: PRIV_END
535:
536: if (!fp)
537: perr("Cannot open file");
538:
539: while((ch = getc(fp)) != EOF)
540: putchar(ch);
541: }
542: break;
543:
544: default:
545: (void)fprintf(stderr,
546: "Internal error, process_jobs = %d\n",
547: what);
548: exit(EXIT_FAILURE);
549: break;
550: }
551: }
1.1 deraadt 552: }
553: }
554: } /* delete_jobs */
555:
556: /* Global functions */
557:
558: int
559: main(argc, argv)
560: int argc;
561: char **argv;
562: {
563: int c;
1.7 millert 564: char queue = DEFAULT_AT_QUEUE;
565: char queue_set = 0;
1.1 deraadt 566: char *pgm;
567:
568: enum {
1.7 millert 569: ATQ, ATRM, AT, BATCH, CAT
570: }; /* what program we want to run */
571: int program = AT; /* our default program */
572: char *options = "q:f:mvldbVc"; /* default options for at */
573: int disp_version = 0;
1.1 deraadt 574: time_t timer;
575:
576: RELINQUISH_PRIVS
577:
578: /* Eat any leading paths */
579: if ((pgm = strrchr(argv[0], '/')) == NULL)
580: pgm = argv[0];
581: else
582: pgm++;
583:
584: namep = pgm;
585:
586: /* find out what this program is supposed to do */
587: if (strcmp(pgm, "atq") == 0) {
588: program = ATQ;
1.7 millert 589: options = "q:vV";
1.1 deraadt 590: } else if (strcmp(pgm, "atrm") == 0) {
591: program = ATRM;
1.7 millert 592: options = "V";
1.1 deraadt 593: } else if (strcmp(pgm, "batch") == 0) {
594: program = BATCH;
1.7 millert 595: options = "f:q:mvV";
1.1 deraadt 596: }
597:
598: /* process whatever options we can process */
599: opterr = 1;
1.6 millert 600: while ((c = getopt(argc, argv, options)) != -1)
1.1 deraadt 601: switch (c) {
602: case 'v': /* verify time settings */
603: atverify = 1;
604: break;
605:
606: case 'm': /* send mail when job is complete */
607: send_mail = 1;
608: break;
609:
610: case 'f':
611: atinput = optarg;
612: break;
613:
614: case 'q': /* specify queue */
615: if (strlen(optarg) > 1)
616: usage();
617:
618: atqueue = queue = *optarg;
1.7 millert 619: if (!(islower(queue) || isupper(queue)))
1.1 deraadt 620: usage();
1.7 millert 621:
622: queue_set = 1;
623: break;
624:
625: case 'd':
626: if (program != AT)
627: usage();
628:
629: program = ATRM;
630: options = "V";
631: break;
632:
633: case 'l':
634: if (program != AT)
635: usage();
636:
637: program = ATQ;
638: options = "q:vV";
639: break;
640:
641: case 'b':
642: if (program != AT)
643: usage();
644:
645: program = BATCH;
646: options = "f:q:mvV";
647: break;
648:
649: case 'V':
650: disp_version = 1;
651: break;
652:
653: case 'c':
654: program = CAT;
655: options = "";
1.1 deraadt 656: break;
657:
658: default:
659: usage();
660: break;
661: }
662: /* end of options eating */
663:
1.7 millert 664: if (disp_version)
665: (void)fprintf(stderr, "%s version %.1f\n", namep, AT_VERSION);
666:
667: if (!check_permission()) {
668: (void)fprintf(stderr, "You do not have permission to use %s.\n",
669: namep);
670: }
671:
1.1 deraadt 672: /* select our program */
673: switch (program) {
674: case ATQ:
1.10 millert 675: if (optind != argc)
676: usage();
1.1 deraadt 677: list_jobs();
678: break;
679:
680: case ATRM:
1.7 millert 681: case CAT:
1.10 millert 682: if (optind == argc)
683: usage();
1.11 ! millert 684: process_jobs(argc, argv, program);
1.1 deraadt 685: break;
686:
687: case AT:
688: timer = parsetime(argc, argv);
689: if (atverify) {
690: struct tm *tm = localtime(&timer);
1.7 millert 691: (void)fprintf(stderr, "%s\n", asctime(tm));
1.1 deraadt 692: }
693: writefile(timer, queue);
694: break;
695:
696: case BATCH:
1.7 millert 697: if (queue_set)
698: queue = toupper(queue);
699: else
700: queue = DEFAULT_BATCH_QUEUE;
701:
702: if (argc > optind)
703: timer = parsetime(argc, argv);
704: else
705: timer = time(NULL);
706:
707: if (atverify) {
708: struct tm *tm = localtime(&timer);
709: (void)fprintf(stderr, "%s\n", asctime(tm));
710: }
711:
712: writefile(timer, queue);
1.1 deraadt 713: break;
714:
715: default:
716: panic("Internal error");
717: break;
718: }
719: exit(EXIT_SUCCESS);
720: }