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
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#define _USE_BSD 1
33
34/* System Headers */
35
36#include <sys/param.h>
37#include <sys/stat.h>
38#include <sys/time.h>
39#include <sys/wait.h>
40#include <ctype.h>
41#include <dirent.h>
42#include <err.h>
43#include <errno.h>
44#include <fcntl.h>
45#ifndef __FreeBSD__
46#include <getopt.h>
47#endif
48#ifdef __FreeBSD__
49#include <locale.h>
50#endif
51#include <pwd.h>
52#include <signal.h>
53#include <stddef.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <time.h>
58#include <unistd.h>
59
60/* Local headers */
61
62#include "at.h"
63#include "panic.h"
64#include "parsetime.h"
65#include "perm.h"
66
67#define MAIN
68#include "privs.h"
69
70/* Macros */
71
72#ifndef ATJOB_DIR
73#define ATJOB_DIR "/usr/spool/atjobs/"
74#endif
75
76#ifndef LFILE
77#define LFILE ATJOB_DIR ".lockfile"
78#endif
79
80#ifndef ATJOB_MX
81#define ATJOB_MX 255
82#endif
83
84#define ALARMC 10 /* Number of seconds to wait for timeout */
85
86#define SIZE 255
87#define TIMESIZE 50
88
89enum { ATQ, ATRM, AT, BATCH, CAT };	/* what program we want to run */
90
91/* File scope variables */
92
93static const char *no_export[] = {
94    "TERM", "TERMCAP", "DISPLAY", "_"
95};
96static int send_mail = 0;
97static char *atinput = NULL;	/* where to get input from */
98static char atqueue = 0;	/* which queue to examine for jobs (atq) */
99
100/* External variables */
101
102extern char **environ;
103int fcreated;
104char atfile[] = ATJOB_DIR "12345678901234";
105char atverify = 0;		/* verify time instead of queuing job */
106char *namep;
107
108/* Function declarations */
109
110static void sigc(int signo);
111static void alarmc(int signo);
112static char *cwdname(void);
113static void writefile(time_t runtimer, char queue);
114static void list_jobs(long *, int);
115static long nextjob(void);
116static time_t ttime(const char *arg);
117static int in_job_list(long, long *, int);
118static long *get_job_list(int, char *[], int *);
119
120/* Signal catching functions */
121
122static void sigc(int signo __unused)
123{
124/* If the user presses ^C, remove the spool file and exit
125 */
126    if (fcreated)
127    {
128	PRIV_START
129	    unlink(atfile);
130	PRIV_END
131    }
132
133    _exit(EXIT_FAILURE);
134}
135
136static void alarmc(int signo __unused)
137{
138    char buf[1024];
139
140    /* Time out after some seconds. */
141    strlcpy(buf, namep, sizeof(buf));
142    strlcat(buf, ": file locking timed out\n", sizeof(buf));
143    write(STDERR_FILENO, buf, strlen(buf));
144    sigc(0);
145}
146
147/* Local functions */
148
149static char *cwdname(void)
150{
151/* Read in the current directory; the name will be overwritten on
152 * subsequent calls.
153 */
154    static char *ptr = NULL;
155    static size_t size = SIZE;
156
157    if (ptr == NULL)
158	if ((ptr = malloc(size)) == NULL)
159	    errx(EXIT_FAILURE, "virtual memory exhausted");
160
161    while (1)
162    {
163	if (ptr == NULL)
164	    panic("out of memory");
165
166	if (getcwd(ptr, size-1) != NULL)
167	    return ptr;
168
169	if (errno != ERANGE)
170	    perr("cannot get directory");
171
172	free (ptr);
173	size += SIZE;
174	if ((ptr = malloc(size)) == NULL)
175	    errx(EXIT_FAILURE, "virtual memory exhausted");
176    }
177}
178
179static long
180nextjob(void)
181{
182    long jobno;
183    FILE *fid;
184
185    if ((fid = fopen(ATJOB_DIR ".SEQ", "r+")) != NULL) {
186	if (fscanf(fid, "%5lx", &jobno) == 1) {
187	    rewind(fid);
188	    jobno = (1+jobno) % 0xfffff;	/* 2^20 jobs enough? */
189	    fprintf(fid, "%05lx\n", jobno);
190	}
191	else
192	    jobno = EOF;
193	fclose(fid);
194	return jobno;
195    }
196    else if ((fid = fopen(ATJOB_DIR ".SEQ", "w")) != NULL) {
197	fprintf(fid, "%05lx\n", jobno = 1);
198	fclose(fid);
199	return 1;
200    }
201    return EOF;
202}
203
204static void
205writefile(time_t runtimer, char queue)
206{
207/* This does most of the work if at or batch are invoked for writing a job.
208 */
209    long jobno;
210    char *ap, *ppos, *mailname;
211    struct passwd *pass_entry;
212    struct stat statbuf;
213    int fdes, lockdes, fd2;
214    FILE *fp, *fpin;
215    struct sigaction act;
216    char **atenv;
217    int ch;
218    mode_t cmask;
219    struct flock lock;
220
221#ifdef __FreeBSD__
222    (void) setlocale(LC_TIME, "");
223#endif
224
225/* Install the signal handler for SIGINT; terminate after removing the
226 * spool file if necessary
227 */
228    act.sa_handler = sigc;
229    sigemptyset(&(act.sa_mask));
230    act.sa_flags = 0;
231
232    sigaction(SIGINT, &act, NULL);
233
234    ppos = atfile + strlen(ATJOB_DIR);
235
236    /* Loop over all possible file names for running something at this
237     * particular time, see if a file is there; the first empty slot at any
238     * particular time is used.  Lock the file LFILE first to make sure
239     * we're alone when doing this.
240     */
241
242    PRIV_START
243
244    if ((lockdes = open(LFILE, O_WRONLY | O_CREAT, S_IWUSR | S_IRUSR)) < 0)
245	perr("cannot open lockfile " LFILE);
246
247    lock.l_type = F_WRLCK; lock.l_whence = SEEK_SET; lock.l_start = 0;
248    lock.l_len = 0;
249
250    act.sa_handler = alarmc;
251    sigemptyset(&(act.sa_mask));
252    act.sa_flags = 0;
253
254    /* Set an alarm so a timeout occurs after ALARMC seconds, in case
255     * something is seriously broken.
256     */
257    sigaction(SIGALRM, &act, NULL);
258    alarm(ALARMC);
259    fcntl(lockdes, F_SETLKW, &lock);
260    alarm(0);
261
262    if ((jobno = nextjob()) == EOF)
263	perr("cannot generate job number");
264
265    sprintf(ppos, "%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 != (char *) 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<sizeof(no_export)/sizeof(no_export[0]); 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	    (void)fputs("export ", fp);
371	    fwrite(*atenv, sizeof(char), eqp-*atenv, fp);
372	    for(ap = eqp;*ap != '\0'; ap++)
373	    {
374		if (*ap == '\n')
375		    fprintf(fp, "\"\n\"");
376		else
377		{
378		    if (!isalnum(*ap)) {
379			switch (*ap) {
380			  case '%': case '/': case '{': case '[':
381			  case ']': case '=': case '}': case '@':
382			  case '+': case '#': case ',': case '.':
383			  case ':': case '-': case '_':
384			    break;
385			  default:
386			    fputc('\\', fp);
387			    break;
388			}
389		    }
390		    fputc(*ap, fp);
391		}
392	    }
393	    fputc('\n', fp);
394
395	}
396    }
397    /* Cd to the directory at the time and write out all the
398     * commands the user supplies from stdin.
399     */
400    fprintf(fp, "cd ");
401    for (ap = cwdname(); *ap != '\0'; ap++)
402    {
403	if (*ap == '\n')
404	    fprintf(fp, "\"\n\"");
405	else
406	{
407	    if (*ap != '/' && !isalnum(*ap))
408		fputc('\\', fp);
409
410	    fputc(*ap, fp);
411	}
412    }
413    /* Test cd's exit status: die if the original directory has been
414     * removed, become unreadable or whatever
415     */
416    fprintf(fp, " || {\n\t echo 'Execution directory "
417	        "inaccessible' >&2\n\t exit 1\n}\n");
418
419    while((ch = getchar()) != EOF)
420	fputc(ch, fp);
421
422    fprintf(fp, "\n");
423    if (ferror(fp))
424	panic("output error");
425
426    if (ferror(stdin))
427	panic("input error");
428
429    fclose(fp);
430
431    /* Set the x bit so that we're ready to start executing
432     */
433
434    if (fchmod(fd2, S_IRUSR | S_IWUSR | S_IXUSR) < 0)
435	perr("cannot give away file");
436
437    close(fd2);
438    fprintf(stderr, "Job %ld will be executed using /bin/sh\n", jobno);
439}
440
441static int
442in_job_list(long job, long *joblist, int len)
443{
444    int i;
445
446    for (i = 0; i < len; i++)
447	if (job == joblist[i])
448	    return 1;
449
450    return 0;
451}
452
453static void
454list_jobs(long *joblist, int len)
455{
456    /* List all a user's jobs in the queue, by looping through ATJOB_DIR,
457     * or everybody's if we are root
458     */
459    struct passwd *pw;
460    DIR *spool;
461    struct dirent *dirent;
462    struct stat buf;
463    struct tm runtime;
464    unsigned long ctm;
465    char queue;
466    long jobno;
467    time_t runtimer;
468    char timestr[TIMESIZE];
469    int first=1;
470
471#ifdef __FreeBSD__
472    (void) setlocale(LC_TIME, "");
473#endif
474
475    PRIV_START
476
477    if (chdir(ATJOB_DIR) != 0)
478	perr("cannot change to " ATJOB_DIR);
479
480    if ((spool = opendir(".")) == NULL)
481	perr("cannot open " ATJOB_DIR);
482
483    /*	Loop over every file in the directory
484     */
485    while((dirent = readdir(spool)) != NULL) {
486	if (stat(dirent->d_name, &buf) != 0)
487	    perr("cannot stat in " ATJOB_DIR);
488
489	/* See it's a regular file and has its x bit turned on and
490         * is the user's
491         */
492	if (!S_ISREG(buf.st_mode)
493	    || ((buf.st_uid != real_uid) && ! (real_uid == 0))
494	    || !(S_IXUSR & buf.st_mode || atverify))
495	    continue;
496
497	if(sscanf(dirent->d_name, "%c%5lx%8lx", &queue, &jobno, &ctm)!=3)
498	    continue;
499
500	/* If jobs are given, only list those jobs */
501	if (joblist && !in_job_list(jobno, joblist, len))
502	    continue;
503
504	if (atqueue && (queue != atqueue))
505	    continue;
506
507	runtimer = 60*(time_t) ctm;
508	runtime = *localtime(&runtimer);
509	strftime(timestr, TIMESIZE, "%+", &runtime);
510	if (first) {
511	    printf("Date\t\t\t\tOwner\t\tQueue\tJob#\n");
512	    first=0;
513	}
514	pw = getpwuid(buf.st_uid);
515
516	printf("%s\t%-16s%c%s\t%ld\n",
517	       timestr,
518	       pw ? pw->pw_name : "???",
519	       queue,
520	       (S_IXUSR & buf.st_mode) ? "":"(done)",
521	       jobno);
522    }
523    PRIV_END
524    closedir(spool);
525}
526
527static void
528process_jobs(int argc, char **argv, int what)
529{
530    /* Delete every argument (job - ID) given
531     */
532    int i;
533    int rc;
534    int nofJobs;
535    int nofDone;
536    int statErrno;
537    struct stat buf;
538    DIR *spool;
539    struct dirent *dirent;
540    unsigned long ctm;
541    char queue;
542    long jobno;
543
544    nofJobs = argc - optind;
545    nofDone = 0;
546
547    PRIV_START
548
549    if (chdir(ATJOB_DIR) != 0)
550	perr("cannot change to " ATJOB_DIR);
551
552    if ((spool = opendir(".")) == NULL)
553	perr("cannot open " ATJOB_DIR);
554
555    PRIV_END
556
557    /*	Loop over every file in the directory
558     */
559    while((dirent = readdir(spool)) != NULL) {
560
561	PRIV_START
562	rc = stat(dirent->d_name, &buf);
563	statErrno = errno;
564	PRIV_END
565	/* There's a race condition between readdir above and stat here:
566	 * another atrm process could have removed the file from the spool
567	 * directory under our nose. If this happens, stat will set errno to
568	 * ENOENT, which we shouldn't treat as fatal.
569	 */
570	if (rc != 0) {
571	    if (statErrno == ENOENT)
572		continue;
573	    else
574		perr("cannot stat in " ATJOB_DIR);
575	}
576
577	if(sscanf(dirent->d_name, "%c%5lx%8lx", &queue, &jobno, &ctm)!=3)
578	    continue;
579
580	for (i=optind; i < argc; i++) {
581	    if (atoi(argv[i]) == jobno) {
582		if ((buf.st_uid != real_uid) && !(real_uid == 0))
583		    errx(EXIT_FAILURE, "%s: not owner", argv[i]);
584		switch (what) {
585		  case ATRM:
586
587		    PRIV_START
588
589		    if (unlink(dirent->d_name) != 0)
590		        perr(dirent->d_name);
591
592		    PRIV_END
593
594		    break;
595
596		  case CAT:
597		    {
598			FILE *fp;
599			int ch;
600
601			PRIV_START
602
603			fp = fopen(dirent->d_name,"r");
604
605			PRIV_END
606
607			if (!fp) {
608			    perr("cannot open file");
609			}
610			while((ch = getc(fp)) != EOF) {
611			    putchar(ch);
612			}
613			fclose(fp);
614		    }
615		    break;
616
617		  default:
618		    errx(EXIT_FAILURE, "internal error, process_jobs = %d",
619			what);
620	        }
621
622		/* All arguments have been processed
623		 */
624		if (++nofDone == nofJobs)
625		    goto end;
626	    }
627	}
628    }
629end:
630    closedir(spool);
631} /* delete_jobs */
632
633#define	ATOI2(ar)	((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
634
635static time_t
636ttime(const char *arg)
637{
638    /*
639     * This is pretty much a copy of stime_arg1() from touch.c.  I changed
640     * the return value and the argument list because it's more convenient
641     * (IMO) to do everything in one place. - Joe Halpin
642     */
643    struct timeval tv[2];
644    time_t now;
645    struct tm *t;
646    int yearset;
647    char *p;
648
649    if (gettimeofday(&tv[0], NULL))
650	panic("Cannot get current time");
651
652    /* Start with the current time. */
653    now = tv[0].tv_sec;
654    if ((t = localtime(&now)) == NULL)
655	panic("localtime");
656    /* [[CC]YY]MMDDhhmm[.SS] */
657    if ((p = strchr(arg, '.')) == NULL)
658	t->tm_sec = 0;		/* Seconds defaults to 0. */
659    else {
660	if (strlen(p + 1) != 2)
661	    goto terr;
662	*p++ = '\0';
663	t->tm_sec = ATOI2(p);
664    }
665
666    yearset = 0;
667    switch(strlen(arg)) {
668    case 12:			/* CCYYMMDDhhmm */
669	t->tm_year = ATOI2(arg);
670	t->tm_year *= 100;
671	yearset = 1;
672	/* FALLTHROUGH */
673    case 10:			/* YYMMDDhhmm */
674	if (yearset) {
675	    yearset = ATOI2(arg);
676	    t->tm_year += yearset;
677	} else {
678	    yearset = ATOI2(arg);
679	    t->tm_year = yearset + 2000;
680	}
681	t->tm_year -= 1900;	/* Convert to UNIX time. */
682	/* FALLTHROUGH */
683    case 8:				/* MMDDhhmm */
684	t->tm_mon = ATOI2(arg);
685	--t->tm_mon;		/* Convert from 01-12 to 00-11 */
686	t->tm_mday = ATOI2(arg);
687	t->tm_hour = ATOI2(arg);
688	t->tm_min = ATOI2(arg);
689	break;
690    default:
691	goto terr;
692    }
693
694    t->tm_isdst = -1;		/* Figure out DST. */
695    tv[0].tv_sec = tv[1].tv_sec = mktime(t);
696    if (tv[0].tv_sec != -1)
697	return tv[0].tv_sec;
698    else
699terr:
700	panic(
701	   "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
702}
703
704static long *
705get_job_list(int argc, char *argv[], int *joblen)
706{
707    int i, len;
708    long *joblist;
709    char *ep;
710
711    joblist = NULL;
712    len = argc;
713    if (len > 0) {
714	if ((joblist = malloc(len * sizeof(*joblist))) == NULL)
715	    panic("out of memory");
716
717	for (i = 0; i < argc; i++) {
718	    errno = 0;
719	    if ((joblist[i] = strtol(argv[i], &ep, 10)) < 0 ||
720		ep == argv[i] || *ep != '\0' || errno)
721		panic("invalid job number");
722	}
723    }
724
725    *joblen = len;
726    return joblist;
727}
728
729int
730main(int argc, char **argv)
731{
732    int c;
733    char queue = DEFAULT_AT_QUEUE;
734    char queue_set = 0;
735    char *pgm;
736
737    int program = AT;			/* our default program */
738    const char *options = "q:f:t:rmvldbc"; /* default options for at */
739    time_t timer;
740    long *joblist;
741    int joblen;
742
743    joblist = NULL;
744    joblen = 0;
745    timer = -1;
746    RELINQUISH_PRIVS
747
748    /* Eat any leading paths
749     */
750    if ((pgm = strrchr(argv[0], '/')) == NULL)
751	pgm = argv[0];
752    else
753        pgm++;
754
755    namep = pgm;
756
757    /* find out what this program is supposed to do
758     */
759    if (strcmp(pgm, "atq") == 0) {
760	program = ATQ;
761	options = "q:v";
762    }
763    else if (strcmp(pgm, "atrm") == 0) {
764	program = ATRM;
765	options = "";
766    }
767    else if (strcmp(pgm, "batch") == 0) {
768	program = BATCH;
769	options = "f:q:mv";
770    }
771
772    /* process whatever options we can process
773     */
774    opterr=1;
775    while ((c=getopt(argc, argv, options)) != -1)
776	switch (c) {
777	case 'v':   /* verify time settings */
778	    atverify = 1;
779	    break;
780
781	case 'm':   /* send mail when job is complete */
782	    send_mail = 1;
783	    break;
784
785	case 'f':
786	    atinput = optarg;
787	    break;
788
789	case 'q':    /* specify queue */
790	    if (strlen(optarg) > 1)
791		usage();
792
793	    atqueue = queue = *optarg;
794	    if (!(islower(queue)||isupper(queue)))
795		usage();
796
797	    queue_set = 1;
798	    break;
799
800	case 'd':
801	    warnx("-d is deprecated; use -r instead");
802	    /* fall through to 'r' */
803
804	case 'r':
805	    if (program != AT)
806		usage();
807
808	    program = ATRM;
809	    options = "";
810	    break;
811
812	case 't':
813	    if (program != AT)
814		usage();
815	    timer = ttime(optarg);
816	    break;
817
818	case 'l':
819	    if (program != AT)
820		usage();
821
822	    program = ATQ;
823	    options = "q:";
824	    break;
825
826	case 'b':
827	    if (program != AT)
828		usage();
829
830	    program = BATCH;
831	    options = "f:q:mv";
832	    break;
833
834	case 'c':
835	    program = CAT;
836	    options = "";
837	    break;
838
839	default:
840	    usage();
841	    break;
842	}
843    /* end of options eating
844     */
845
846    /* select our program
847     */
848    if(!check_permission())
849	errx(EXIT_FAILURE, "you do not have permission to use this program");
850    switch (program) {
851    case ATQ:
852
853	REDUCE_PRIV(DAEMON_UID, DAEMON_GID)
854
855	if (queue_set == 0)
856	    joblist = get_job_list(argc - optind, argv + optind, &joblen);
857	list_jobs(joblist, joblen);
858	break;
859
860    case ATRM:
861
862	REDUCE_PRIV(DAEMON_UID, DAEMON_GID)
863
864	process_jobs(argc, argv, ATRM);
865	break;
866
867    case CAT:
868
869	process_jobs(argc, argv, CAT);
870	break;
871
872    case AT:
873	/*
874	 * If timer is > -1, then the user gave the time with -t.  In that
875	 * case, it's already been set. If not, set it now.
876	 */
877	if (timer == -1)
878	    timer = parsetime(argc, argv);
879
880	if (atverify)
881	{
882	    struct tm *tm = localtime(&timer);
883	    fprintf(stderr, "%s\n", asctime(tm));
884	}
885	writefile(timer, queue);
886	break;
887
888    case BATCH:
889	if (queue_set)
890	    queue = toupper(queue);
891	else
892	    queue = DEFAULT_BATCH_QUEUE;
893
894	if (argc > optind)
895	    timer = parsetime(argc, argv);
896	else
897	    timer = time(NULL);
898
899	if (atverify)
900	{
901	    struct tm *tm = localtime(&timer);
902	    fprintf(stderr, "%s\n", asctime(tm));
903	}
904
905        writefile(timer, queue);
906	break;
907
908    default:
909	panic("internal error");
910	break;
911    }
912    exit(EXIT_SUCCESS);
913}
914