forked from dubiousjim/dcron
-
Notifications
You must be signed in to change notification settings - Fork 0
/
database.c
1341 lines (1206 loc) · 34.3 KB
/
database.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* DATABASE.C
*
* Copyright 1994 Matthew Dillon (dillon@apollo.backplane.com)
* Copyright 2009-2019 James Pryor <dubiousjim@gmail.com>
* May be distributed under the GNU General Public License version 2 or any later version.
*/
#include "defs.h"
#define FIRST_DOW (1 << 0)
#define SECOND_DOW (1 << 1)
#define THIRD_DOW (1 << 2)
#define FOURTH_DOW (1 << 3)
#define FIFTH_DOW (1 << 4)
#define LAST_DOW (1 << 5)
#define ALL_DOW (FIRST_DOW|SECOND_DOW|THIRD_DOW|FOURTH_DOW|FIFTH_DOW|LAST_DOW)
Prototype void CheckUpdates(const char *dpath, const char *user_override, time_t t1, time_t t2);
Prototype void SynchronizeDir(const char *dpath, const char *user_override, int initial_scan);
Prototype void ReadTimestamps(const char *user);
Prototype int TestJobs(time_t t1, time_t t2);
Prototype int TestStartupJobs(void);
Prototype int ArmJob(CronFile *file, CronLine *line, time_t t1, time_t t2);
Prototype void RunJobs(void);
Prototype int CheckJobs(void);
void SynchronizeFile(const char *dpath, const char *fname, const char *uname);
void DeleteFile(CronFile **pfile);
char *ParseInterval(int *interval, char *ptr);
char *ParseField(char *userName, char *ary, int modvalue, int offset, int onvalue, const char **names, char *ptr);
void FixDayDow(CronLine *line);
void PrintLine(CronLine *line);
void PrintFile(CronFile *file, char* loc, char* fname, int line);
CronFile *FileBase = NULL;
const char *DowAry[] = {
"sun",
"mon",
"tue",
"wed",
"thu",
"fri",
"sat",
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
NULL
};
const char *MonAry[] = {
"jan",
"feb",
"mar",
"apr",
"may",
"jun",
"jul",
"aug",
"sep",
"oct",
"nov",
"dec",
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec",
NULL
};
const char *FreqAry[] = {
"noauto",
"reboot",
"hourly",
"daily",
"weekly",
"monthly",
"yearly",
NULL
};
/*
* Check the cron.update file in the specified directory. If user_override
* is NULL then the files in the directory belong to the user whose name is
* the file, otherwise they belong to the user_override user.
*/
void
CheckUpdates(const char *dpath, const char *user_override, time_t t1, time_t t2)
{
FILE *fi;
char buf[SMALL_BUFFER];
char *fname, *ptok, *job;
char *path;
if (!(path = concat(dpath, "/", CRONUPDATE, NULL))) {
errno = ENOMEM;
perror("CheckUpdates");
exit(1);
}
if ((fi = fopen(path, "r")) != NULL) {
remove(path);
printlogf(LOG_INFO, "reading %s/%s\n", dpath, CRONUPDATE);
while (fgets(buf, sizeof(buf), fi) != NULL) {
/*
* if buf has only sep chars, return NULL and point ptok at buf's terminating 0
* else return pointer to first non-sep of buf and
* if there's a following sep, overwrite it to 0 and point ptok to next char
* else point ptok at buf's terminating 0
*/
fname = strtok_r(buf, " \t\n", &ptok);
if (user_override)
SynchronizeFile(dpath, fname, user_override);
else if (!getpwnam(fname))
printlogf(LOG_WARNING, "ignoring %s/%s (non-existent user)\n", dpath, fname);
else if (*ptok == 0 || *ptok == '\n') {
SynchronizeFile(dpath, fname, fname);
ReadTimestamps(fname);
} else {
/* if fname is followed by whitespace, we prod any following jobs */
CronFile *file = FileBase;
while (file) {
if (strcmp(file->cf_UserName, fname) == 0)
break;
file = file->cf_Next;
}
if (!file)
printlogf(LOG_WARNING, "unable to prod for user %s: no crontab\n", fname);
else {
CronLine *line;
/* calling strtok(ptok...) then strtok(NULL) is equiv to calling strtok_r(NULL,..&ptok) */
while ((job = strtok(ptok, " \t\n")) != NULL) {
time_t force = t2;
ptok = NULL;
if (*job == '!') {
force = (time_t)-1;
++job;
}
line = file->cf_LineBase;
while (line) {
if (line->cl_JobName && strcmp(line->cl_JobName, job) == 0)
break;
line = line->cl_Next;
}
if (line)
ArmJob(file, line, t1, force);
else {
printlogf(LOG_WARNING, "unable to prod for user %s: unknown job %s\n", fname, job);
/* we can continue parsing this line, we just don't install any CronWaiter for the requested job */
}
}
}
}
}
fclose(fi);
}
free(path);
}
void
SynchronizeDir(const char *dpath, const char *user_override, int initial_scan)
{
CronFile **pfile;
CronFile *file;
struct dirent *den;
DIR *dir;
char *path;
if (DebugOpt)
printlogf(LOG_DEBUG, "Synchronizing %s\n", dpath);
/*
* Delete all database CronFiles for this directory. DeleteFile() will
* free *pfile and relink the *pfile pointer, or in the alternative will
* mark it as deleted.
*/
pfile = &FileBase;
while ((file = *pfile) != NULL) {
if (file->cf_Deleted == 0 && strcmp(file->cf_DPath, dpath) == 0) {
DeleteFile(pfile);
} else {
pfile = &file->cf_Next;
}
}
/*
* Since we are resynchronizing the entire directory, remove the
* the CRONUPDATE file.
*/
if (!(path = concat(dpath, "/", CRONUPDATE, NULL))) {
errno = ENOMEM;
perror("SynchronizeDir");
exit(1);
}
remove(path);
free(path);
/*
* Scan the specified directory
*/
if ((dir = opendir(dpath)) != NULL) {
while ((den = readdir(dir)) != NULL) {
if (strchr(den->d_name, '.') != NULL)
continue;
if (strcmp(den->d_name, CRONUPDATE) == 0)
continue;
if (user_override) {
SynchronizeFile(dpath, den->d_name, user_override);
} else if (getpwnam(den->d_name)) {
SynchronizeFile(dpath, den->d_name, den->d_name);
} else {
printlogf(LOG_WARNING, "ignoring %s/%s (non-existent user)\n",
dpath, den->d_name);
}
}
closedir(dir);
} else {
if (initial_scan)
printlogf(LOG_ERR, "unable to scan directory %s\n", dpath);
/* softerror, do not exit the program */
}
}
void
ReadTimestamps(const char *user)
{
CronFile *file;
CronLine *line;
FILE *fi;
char buf[SMALL_BUFFER];
char *ptr;
struct tm tm = {0};
time_t sec, freq;
file = FileBase;
while (file != NULL) {
if (file->cf_Deleted == 0 && (!user || strcmp(user, file->cf_UserName) == 0)) {
line = file->cf_LineBase;
while (line != NULL) {
if (line->cl_Timestamp) {
if ((fi = fopen(line->cl_Timestamp, "r")) != NULL) {
if (fgets(buf, sizeof(buf), fi) != NULL) {
int fake = 0;
ptr = buf;
if (strncmp(buf, "after ", 6) == 0) {
fake = 1;
ptr += 6;
}
sec = (time_t)-1;
ptr = strptime(ptr, CRONSTAMP_FMT, &tm);
if (ptr && (*ptr == 0 || *ptr == '\n')) {
/* strptime uses current seconds when seconds not specified? anyway, we don't get round minutes */
tm.tm_sec = 0;
tm.tm_isdst = -1;
sec = mktime(&tm);
}
if (sec == (time_t)-1) {
printlogf(LOG_ERR, "unable to parse timestamp (user %s job %s)\n", file->cf_UserName, line->cl_JobName);
/* we continue checking other timestamps in this CronFile */
} else {
/* sec -= sec % 60; */
if (fake) {
line->cl_NotUntil = sec;
} else {
line->cl_LastRan = sec;
freq = (line->cl_Freq > 0) ? line->cl_Freq : line->cl_Delay;
/* if (line->cl_NotUntil < line->cl_LastRan + freq) */
line->cl_NotUntil = line->cl_LastRan + freq;
}
}
}
fclose(fi);
} else {
int succeeded = 0;
printlogf(LOG_NOTICE, "no timestamp found (user %s job %s)\n", file->cf_UserName, line->cl_JobName);
/* write a fake timestamp file so our initial NotUntil doesn't keep being reset every hour when crond does a SynchronizeDir */
if ((fi = fopen(line->cl_Timestamp, "w")) != NULL) {
if (strftime(buf, sizeof(buf), CRONSTAMP_FMT, localtime(&line->cl_NotUntil)))
if (fputs("after ", fi) >= 0)
if (fputs(buf,fi) >= 0)
succeeded = 1;
fclose(fi);
}
if (!succeeded)
printlogf(LOG_WARNING, "unable to write timestamp to %s (user %s %s)\n", line->cl_Timestamp, file->cf_UserName, line->cl_Description);
}
}
line = line->cl_Next;
}
}
file = file->cf_Next;
}
}
void
SynchronizeFile(const char *dpath, const char *fileName, const char *userName)
{
CronFile **pfile;
CronFile *file;
int maxEntries;
int maxLines;
char buf[RW_BUFFER]; /* max length for crontab lines */
char *path;
FILE *fi;
/*
* Limit entries
*/
if (strcmp(userName, "root") == 0)
maxEntries = 65535;
else
maxEntries = MAXLINES;
maxLines = maxEntries * 10;
/*
* Delete any existing copy of this CronFile
*/
pfile = &FileBase;
while ((file = *pfile) != NULL) {
if (file->cf_Deleted == 0 && strcmp(file->cf_DPath, dpath) == 0 &&
strcmp(file->cf_FileName, fileName) == 0
) {
DeleteFile(pfile);
} else {
pfile = &file->cf_Next;
}
}
if (!(path = concat(dpath, "/", fileName, NULL))) {
errno = ENOMEM;
perror("SynchronizeFile");
exit(1);
}
if ((fi = fopen(path, "r")) != NULL) {
struct stat sbuf;
if (fstat(fileno(fi), &sbuf) == 0 && sbuf.st_uid == DaemonUid) {
CronFile *file = calloc(1, sizeof(CronFile));
CronLine **pline;
time_t tnow = time(NULL);
tnow -= tnow % 60;
file->cf_UserName = strdup(userName);
file->cf_FileName = strdup(fileName);
file->cf_DPath = strdup(dpath);
pline = &file->cf_LineBase;
/* fgets reads at most size-1 chars until \n or EOF, then adds a\0; \n if present is stored in buf */
while (fgets(buf, sizeof(buf), fi) != NULL && --maxLines) {
CronLine line;
char *ptr = buf;
int len;
while (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')
++ptr;
len = strlen(ptr);
if (len && ptr[len-1] == '\n')
ptr[--len] = 0;
if (*ptr == 0 || *ptr == '#')
continue;
if (--maxEntries == 0)
break;
memset(&line, 0, sizeof(line));
if (DebugOpt)
printlogf(LOG_DEBUG, "User %s Entry %s\n", userName, buf);
if (*ptr == '@') {
/*
* parse @hourly, etc
*/
int j;
line.cl_Delay = -1;
ptr += 1;
for (j = 0; FreqAry[j]; ++j) {
if (strncmp(ptr, FreqAry[j], strlen(FreqAry[j])) == 0) {
break;
}
}
if (FreqAry[j]) {
ptr += strlen(FreqAry[j]);
switch(j) {
case 0:
/* noauto */
line.cl_Freq = -2;
line.cl_Delay = 0;
break;
case 1:
/* reboot */
line.cl_Freq = -1;
line.cl_Delay = 0;
break;
case 2:
line.cl_Freq = HOURLY_FREQ;
break;
case 3:
line.cl_Freq = DAILY_FREQ;
break;
case 4:
line.cl_Freq = WEEKLY_FREQ;
break;
case 5:
line.cl_Freq = MONTHLY_FREQ;
break;
case 6:
line.cl_Freq = YEARLY_FREQ;
break;
/* else line.cl_Freq will remain 0 */
}
}
if (!line.cl_Freq || (*ptr != ' ' && *ptr != '\t')) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s\n", userName, buf);
continue;
}
if (line.cl_Delay < 0) {
/*
* delays on @daily, @hourly, etc are 1/20 of the frequency
* so they don't all start at once
* this also affects how they behave when the job returns EAGAIN
*/
line.cl_Delay = line.cl_Freq / 20;
line.cl_Delay -= line.cl_Delay % 60;
if (line.cl_Delay == 0)
line.cl_Delay = 60;
/* all minutes are permitted */
for (j=0; j<60; ++j)
line.cl_Mins[j] = 1;
for (j=0; j<24; ++j)
line.cl_Hrs[j] = 1;
for (j=1; j<32; ++j)
/* days are numbered 1..31 */
line.cl_Days[j] = 1;
for (j=0; j<12; ++j)
line.cl_Mons[j] = 1;
}
while (*ptr == ' ' || *ptr == '\t')
++ptr;
} else {
/*
* parse date ranges
*/
ptr = ParseField(file->cf_UserName, line.cl_Mins, FIELD_MINUTES, 0, 1,
NULL, ptr);
ptr = ParseField(file->cf_UserName, line.cl_Hrs, FIELD_HOURS, 0, 1,
NULL, ptr);
ptr = ParseField(file->cf_UserName, line.cl_Days, FIELD_M_DAYS, 0, 1,
NULL, ptr);
ptr = ParseField(file->cf_UserName, line.cl_Mons, FIELD_MONTHS, -1, 1,
MonAry, ptr);
ptr = ParseField(file->cf_UserName, line.cl_Dow, FIELD_W_DAYS, 0, ALL_DOW,
DowAry, ptr);
/*
* check failure
*/
if (ptr == NULL)
continue;
/*
* fix days and dow - if one is not * and the other
* is *, the other is set to 0, and vise-versa
*/
FixDayDow(&line);
}
/* check for ID=... and AFTER=... and FREQ=... */
do {
if (strncmp(ptr, ID_TAG, strlen(ID_TAG)) == 0) {
if (line.cl_JobName) {
/* only assign ID_TAG once */
printlogf(LOG_WARNING, "failed parsing crontab for user %s: repeated %s\n", userName, ptr);
ptr = NULL;
} else {
ptr += strlen(ID_TAG);
/*
* name = strsep(&ptr, seps):
* return name = ptr, and if ptr contains sep chars, overwrite first with 0 and point ptr to next char
* else set ptr=NULL
*/
if (!(line.cl_Description = concat("job ", strsep(&ptr, " \t"), NULL))) {
errno = ENOMEM;
perror("SynchronizeFile");
exit(1);
}
line.cl_JobName = line.cl_Description + 4;
if (!ptr)
printlogf(LOG_WARNING, "failed parsing crontab for user %s: no command after %s%s\n", userName, ID_TAG, line.cl_JobName);
}
} else if (strncmp(ptr, FREQ_TAG, strlen(FREQ_TAG)) == 0) {
if (line.cl_Freq) {
/* only assign FREQ_TAG once */
printlogf(LOG_WARNING, "failed parsing crontab for user %s: repeated %s\n", userName, ptr);
ptr = NULL;
} else {
char *base = ptr;
ptr += strlen(FREQ_TAG);
ptr = ParseInterval(&line.cl_Freq, ptr);
if (ptr && *ptr == '/')
ptr = ParseInterval(&line.cl_Delay, ++ptr);
else
line.cl_Delay = line.cl_Freq;
if (!ptr) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s\n", userName, base);
} else if (*ptr != ' ' && *ptr != '\t') {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: no command after %s\n", userName, base);
ptr = NULL;
}
}
} else if (strncmp(ptr, WAIT_TAG, strlen(WAIT_TAG)) == 0) {
if (line.cl_Waiters) {
/* only assign WAIT_TAG once */
printlogf(LOG_WARNING, "failed parsing crontab for user %s: repeated %s\n", userName, ptr);
ptr = NULL;
} else {
short more = 1;
char *name;
ptr += strlen(WAIT_TAG);
do {
CronLine *job, **pjob;
if (strcspn(ptr,",") < strcspn(ptr," \t"))
name = strsep(&ptr, ",");
else {
more = 0;
name = strsep(&ptr, " \t");
}
if (!ptr || *ptr == 0) {
/* unexpectedly this was the last token in buf; so abort */
printlogf(LOG_WARNING, "failed parsing crontab for user %s: no command after %s%s\n", userName, WAIT_TAG, name);
ptr = NULL;
} else {
int waitfor = 0;
char *w, *wsave;
if ((w = strchr(name, '/')) != NULL) {
wsave = w++;
w = ParseInterval(&waitfor, w);
if (!w || *w != 0) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s%s\n", userName, WAIT_TAG, name);
ptr = NULL;
} else
/* truncate name */
*wsave = 0;
}
if (ptr) {
/* look for a matching CronLine */
pjob = &file->cf_LineBase;
while ((job = *pjob) != NULL) {
if (job->cl_JobName && strcmp(job->cl_JobName, name) == 0) {
CronWaiter *waiter = malloc(sizeof(CronWaiter));
CronNotifier *notif = malloc(sizeof(CronNotifier));
waiter->cw_Flag = -1;
waiter->cw_MaxWait = waitfor;
waiter->cw_NotifLine = job;
waiter->cw_Notifier = notif;
waiter->cw_Next = line.cl_Waiters; /* add to head of line.cl_Waiters */
line.cl_Waiters = waiter;
notif->cn_Waiter = waiter;
notif->cn_Next = job->cl_Notifs; /* add to head of job->cl_Notifs */
job->cl_Notifs = notif;
break;
} else
pjob = &job->cl_Next;
}
if (!job) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: unknown job %s\n", userName, name);
/* we can continue parsing this line, we just don't install any CronWaiter for the requested job */
}
}
}
} while (ptr && more);
}
} else
break;
if (!ptr)
break;
while (*ptr == ' ' || *ptr == '\t')
++ptr;
} while (!line.cl_JobName || !line.cl_Waiters || !line.cl_Freq);
if (line.cl_JobName && (!ptr || *line.cl_JobName == 0)) {
/* we're aborting, or ID= was empty */
free(line.cl_Description);
line.cl_Description = NULL;
line.cl_JobName = NULL;
}
if (ptr && line.cl_Delay > 0 && !line.cl_JobName) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: writing timestamp requires job %s to be named\n", userName, ptr);
ptr = NULL;
}
if (!ptr) {
/* couldn't parse so we abort; free any cl_Waiters */
if (line.cl_Waiters) {
CronWaiter **pwaiters, *waiters;
pwaiters = &line.cl_Waiters;
while ((waiters = *pwaiters) != NULL) {
*pwaiters = waiters->cw_Next;
/* leave the Notifier allocated but disabled */
waiters->cw_Notifier->cn_Waiter = NULL;
free(waiters);
}
}
continue;
}
/* now we've added any ID=... or AFTER=... */
/*
* copy command string
*/
line.cl_Shell = strdup(ptr);
if (line.cl_Delay > 0) {
if (!(line.cl_Timestamp = concat(TSDir, "/", userName, ".", line.cl_JobName, NULL))) {
errno = ENOMEM;
perror("SynchronizeFile");
exit(1);
}
line.cl_NotUntil = tnow + line.cl_Delay;
}
if (line.cl_JobName) {
if (DebugOpt)
printlogf(LOG_DEBUG, " Command %s Job %s\n\n", line.cl_Shell, line.cl_JobName);
} else {
/* when cl_JobName is NULL, we point cl_Description to cl_Shell */
line.cl_Description = line.cl_Shell;
if (DebugOpt)
printlogf(LOG_DEBUG, " Command %s\n\n", line.cl_Shell);
}
*pline = calloc(1, sizeof(CronLine));
/* copy working CronLine to newly allocated one */
**pline = line;
pline = &((*pline)->cl_Next);
}
*pline = NULL;
file->cf_Next = FileBase;
FileBase = file;
if (maxLines == 0 || maxEntries == 0)
printlogf(LOG_WARNING, "maximum number of lines reached for user %s\n", userName);
}
fclose(fi);
}
free(path);
}
char *
ParseInterval(int *interval, char *ptr)
{
int n = 0;
if (ptr && *ptr >= '0' && *ptr <= '9' && (n = strtol(ptr, &ptr, 10)) > 0)
switch (*ptr) {
case 'm':
n *= 60;
break;
case 'h':
n *= HOURLY_FREQ;
break;
case 'd':
n *= DAILY_FREQ;
break;
case 'w':
n *= WEEKLY_FREQ;
break;
default:
n = 0;
}
if (n > 0) {
*interval = n;
return (ptr+1);
} else
return (NULL);
}
char *
ParseField(char *user, char *ary, int modvalue, int offset, int onvalue, const char **names, char *ptr)
{
char *base = ptr;
int n1 = -1;
int n2 = -1;
if (base == NULL)
return (NULL);
while (*ptr != ' ' && *ptr != '\t' && *ptr != '\n') {
int skip = 0;
/*
* Handle numeric digit or symbol or '*'
*/
if (*ptr == '*') {
n1 = 0; /* everything will be filled */
n2 = modvalue - 1;
skip = 1;
++ptr;
} else if (*ptr >= '0' && *ptr <= '9') {
if (n1 < 0)
n1 = strtol(ptr, &ptr, 10) + offset;
else
n2 = strtol(ptr, &ptr, 10) + offset;
skip = 1;
} else if (names) {
int i;
for (i = 0; names[i]; ++i) {
if (strncmp(ptr, names[i], strlen(names[i])) == 0) {
break;
}
}
if (names[i]) {
ptr += strlen(names[i]);
if (n1 < 0)
n1 = i;
else
n2 = i;
skip = 1;
}
}
/*
* handle optional range '-'
*/
if (skip == 0) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s\n", user, base);
return(NULL);
}
if (*ptr == '-' && n2 < 0) {
++ptr;
continue;
}
/*
* collapse single-value ranges, handle skipmark, and fill
* in the character array appropriately.
*/
if (n2 < 0)
n2 = n1;
n2 = n2 % modvalue;
if (*ptr == '/')
skip = strtol(ptr + 1, &ptr, 10);
/*
* fill array, using a failsafe is the easiest way to prevent
* an endless loop
*/
{
int s0 = 1;
int failsafe = 1024;
--n1;
do {
n1 = (n1 + 1) % modvalue;
if (--s0 == 0) {
ary[n1] = onvalue;
s0 = skip;
}
} while (n1 != n2 && --failsafe);
if (failsafe == 0) {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s\n", user, base);
return(NULL);
}
}
if (*ptr != ',')
break;
++ptr;
n1 = -1;
n2 = -1;
}
if (*ptr != ' ' && *ptr != '\t' && *ptr != '\n') {
printlogf(LOG_WARNING, "failed parsing crontab for user %s: %s\n", user, base);
return(NULL);
}
while (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')
++ptr;
if (DebugOpt) {
int i;
for (i = 0; i < modvalue; ++i)
if (modvalue == FIELD_W_DAYS)
printlogf(LOG_DEBUG, "%2x ", ary[i]);
else
printlogf(LOG_DEBUG, "%d", ary[i]);
printlogf(LOG_DEBUG, "\n");
}
return(ptr);
}
/* Reconcile Days of Month with Days of Week.
* There are four cases to cover:
* 1) DoM and DoW are both specified as *; the task may run on any day
* 2) DoM is * and DoW is specific; the task runs weekly on the specified DoW(s)
* 3) DoM is specific and DoW is *; the task runs on the specified DoM, regardless
* of which day of the week they fall
* 4) DoM is in the range [1..5] and DoW is specific; the task runs on the Nth
* specified DoW. DoM > 5 means the last such DoW in that month
*/
void
FixDayDow(CronLine *line)
{
unsigned short i;
short DowStar = 1;
short DomStar = 1;
char mask = 0;
for (i = 0; i < arysize(line->cl_Dow); ++i) {
if (line->cl_Dow[i] == 0) {
/* '*' was NOT specified in the DoW field on this CronLine */
DowStar = 0;
break;
}
}
for (i = 0; i < arysize(line->cl_Days); ++i) {
if (line->cl_Days[i] == 0) {
/* '*' was NOT specified in the Date field on this CronLine */
DomStar = 0;
break;
}
}
/* When cases 1, 2 or 3 there is nothing left to do */
if (DowStar || DomStar)
return;
/* Set individual bits within the DoW mask... */
for (i = 0; i < arysize(line->cl_Days); ++i) {
if (line->cl_Days[i]) {
if (i < 6)
mask |= 1 << (i - 1);
else
mask |= LAST_DOW;
}
}
/* and apply the mask to each DoW element */
for (i = 0; i < arysize(line->cl_Dow); ++i) {
if (line->cl_Dow[i])
line->cl_Dow[i] = mask;
else
line->cl_Dow[i] = 0;
}
/* case 4 relies on the DoW value to guard the date instead of using the
* cl_Days field for this purpose; so we must set each element of cl_Days
* to 1 to allow the DoW bitmask test to be made
*/
memset(line->cl_Days, 1, sizeof(line->cl_Days));
}
/*
* DeleteFile() - destroy a CronFile.
*
* The CronFile (*pfile) is destroyed if possible, and marked cf_Deleted
* if there are still active processes running on it. *pfile is relinked
* on success.
*/
void
DeleteFile(CronFile **pfile)
{
CronFile *file = *pfile;
CronLine **pline = &file->cf_LineBase;
CronLine *line;
CronWaiter **pwaiters, *waiters;
CronNotifier **pnotifs, *notifs;
file->cf_Running = 0;
file->cf_Deleted = 1;
while ((line = *pline) != NULL) {
if (line->cl_Pid > JOB_NONE) {
file->cf_Running = 1;
pline = &line->cl_Next;
} else {
*pline = line->cl_Next;
free(line->cl_Shell);
if (line->cl_JobName)
/* this frees both cl_Description and cl_JobName
* if cl_JobName is NULL, Description pointed to ch_Shell, which was already freed
*/
free(line->cl_Description);
if (line->cl_Timestamp)
free(line->cl_Timestamp);
pnotifs = &line->cl_Notifs;
while ((notifs = *pnotifs) != NULL) {
*pnotifs = notifs->cn_Next;
if (notifs->cn_Waiter) {
notifs->cn_Waiter->cw_NotifLine = NULL;
notifs->cn_Waiter->cw_Notifier = NULL;
}
free(notifs);
}
pwaiters = &line->cl_Waiters;
while ((waiters = *pwaiters) != NULL) {
*pwaiters = waiters->cw_Next;
if (waiters->cw_Notifier)
waiters->cw_Notifier->cn_Waiter = NULL;
free(waiters);
}
free(line);
}
}
if (file->cf_Running == 0) {
*pfile = file->cf_Next;
free(file->cf_DPath);
free(file->cf_FileName);
free(file->cf_UserName);
free(file);
}
}
/*
* TestJobs()
*
* determine which jobs need to be run. Under normal conditions, the
* period is about a minute (one scan). Worst case it will be one
* hour (60 scans).
*/
int
TestJobs(time_t t1, time_t t2)
{
short nJobs = 0;
time_t t;
CronFile *file;
CronLine *line;
PrintFile(FileBase, "TestJobs()", __FILE__, __LINE__);
for (file = FileBase; file; file = file->cf_Next) {
if (file->cf_Deleted)
continue;
for (line = file->cf_LineBase; line; line = line->cl_Next) {
struct CronWaiter *waiter;
if (line->cl_Pid == JOB_WAITING) {
/* can job stop waiting? */
int ready = 1;
waiter = line->cl_Waiters;
while (waiter != NULL) {
if (waiter->cw_Flag > 0) {
/* notifier exited unsuccessfully */
ready = 2;
break;
} else if (waiter->cw_Flag < 0)
/* still waiting, notifier hasn't run to completion */
ready = 0;
waiter = waiter->cw_Next;
}
if (ready == 2) {
if (DebugOpt)
printlogf(LOG_DEBUG, "cancelled waiting: user %s %s\n", file->cf_UserName, line->cl_Description);
line->cl_Pid = JOB_NONE;
} else if (ready) {
if (DebugOpt)
printlogf(LOG_DEBUG, "finished waiting: user %s %s\n", file->cf_UserName, line->cl_Description);
nJobs += ArmJob(file, line, 0, -1);