File: and.c

package info (click to toggle)
and 1.2.2-4.1
  • links: PTS
  • area: main
  • in suites: bullseye, buster, jessie, jessie-kfreebsd, sid, squeeze, stretch, wheezy
  • size: 352 kB
  • ctags: 296
  • sloc: ansic: 1,198; sh: 253; makefile: 164
file content (1003 lines) | stat: -rw-r--r-- 28,291 bytes parent folder | download
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
1001
1002
1003
/*

    AND auto nice daemon - renice programs according to their CPU usage.
    Copyright (C) 1999-2004 Patrick Schemitz <schemitz@users.sourceforge.net>
    http://and.sourceforge.net/

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

/************************************************************************
 *                                                                      *
 * and.c -- AND library for platform-independent code.                  *
 *                                                                      *
 * Automatically renice jobs when they use too much CPU time.           *
 *                                                                      *
 * 1999-2004 Patrick Schemitz <schemitz@users.sourceforge.net>          *
 * http://and.sourceforge.net/                                          *
 *                                                                      *
 ***********************************************************************/

#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <pwd.h>
#include <grp.h>
#include <syslog.h>
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <signal.h>
#include <regex.h>
#include <values.h>

#define DEBUG 0

/* OpenBSD getopt() is in unistd.h; Linux and Digital UNIX have getopt.h */
#if !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__svr4__) && !defined(__SunOS__)
#include <getopt.h>
#endif

/* GNU C library forgets to declare this one: */
#ifdef __GNUC__
int vsnprintf (char *str, size_t n, const char *format, va_list ap);
#define HAVE_VSNPRINTF
#endif

#include "and.h"



#ifndef DEFAULT_NICE
#define DEFAULT_NICE 0
#endif

#ifndef LOG_PERROR
#define LOG_PERROR 0
#endif

#ifndef DEFAULT_INTERVAL
#define DEFAULT_INTERVAL 60
#endif

#ifndef DEFAULT_CONFIG_FILE
#define DEFAULT_CONFIG_FILE "/etc/and.conf"
#endif

#ifndef DEFAULT_DATABASE_FILE
#define DEFAULT_DATABASE_FILE "/etc/and.priorities"
#endif

#ifndef AND_VERSION
#define AND_VERSION "1.0.7 or above (not compiled in)"
#endif

#ifndef AND_DATE
#define AND_DATE "27 Jan 2002 or later (not compiled in)"
#endif


#define bool  char
#define false (0)
#define true  (!false)


/* Maximum entries in priority database. You may change this,
   if you have a really large priority database. However, you
   shouldn't make too large databases since the get_priority()
   function takes too long otherwise. */

#define PRI_MAXENTRIES 100


/* Indices for the weight array when resolving a user/group/command/parent
   tuple to get the correct priority database entry. These are
   constants. Never ever change them! Change the affinity in the
   config file instead. */

enum {
  PRI_U, PRI_G, PRI_C, PRI_P, PRI_N
};


/* Priority database entry record. Consists of the user ID, the
   group ID, the command (string and compiled regexp), the parent
   (string and compiled regexp), and three nice levels. */

#define PARENT_ONLY 0
#define PARENT_AND_ANCHESTORS 1

#define PARENT_ONLY_KEYWORD "parent="
#define PARENT_AND_ANCHESTORS_KEYWORD "ancestor="

struct priority_db_entry {
  int uid;
  int gid;
  char command_str [128];
  regex_t *command;
  char parent_str [128];
  regex_t *parent;
  int parentmode;
  int nl [3];
};


/* Global variables for priority database (db), configuration (conf),
   and other arguments (args). */

struct{
  int n;
  struct priority_db_entry entry [PRI_MAXENTRIES];
} and_db;



/* AND configuration data. Some of this is compiled in; for some things
   there are command-line options, and some is read from and.conf */

struct {
  char hostname [512];
  int test;
  int foreground;
  char *program;
  char *config_file;
  char *database_file;
  int verbose;
  int to_stdout;
  int nice_default;
  bool lock_interval;
  unsigned interval;
  unsigned time_mark [3];
  char affinity [5];
  int weight [PRI_N];
  int min_uid;
  int min_gid;
} and_config;



/* Initialise configuration parameters. Some are later over-
   ridden by command-line arguments and and.conf. */

void set_defaults (int argc, char **argv)
{
  and_config.test = 0;
  and_config.foreground = 0;
  and_config.verbose = 0;
  and_config.to_stdout = 0;
  and_config.program = argv[0];
  and_config.lock_interval = false;
  and_config.interval = DEFAULT_INTERVAL;
  and_config.config_file = DEFAULT_CONFIG_FILE;
  and_config.database_file = DEFAULT_DATABASE_FILE;
  and_config.nice_default = DEFAULT_NICE;
  and_config.min_uid = 0;
  and_config.min_gid = 0;
  gethostname(and_config.hostname,511);
  and_config.hostname[511] = 0;
}



/* Log AND messages (to ./debug.and if in test mode, syslog() otherwise).
   If available, uses non-ANSI function vsnprintf() to avoid possible
   buffer overflow. */

void and_printf (int required_verbosity, char *fmt, ...)
{
  va_list args;
  static int syslog_open = 0;
  static FILE *out = NULL;
  char buffer [2048];
  time_t t;
  va_start(args,fmt);
  if (and_config.verbose >= required_verbosity)
  {
    if (and_config.test) {
      /* in test mode, create log file; use stderr on failure */
      if (!and_config.to_stdout && !out) {
        out = fopen("./debug.and","wt");
        if (!out) {
          out = stderr;
        }
      }
      /* write time stamp to ./debug.and */
      t = time(NULL);
      strncpy(buffer,ctime(&t),2047);
      buffer[strlen(buffer)-1] = ' ';
      if (and_config.to_stdout)
        fputs(buffer,stdout);
      else
        fputs(buffer,out);
    }
    /* build actual log message */
#ifdef HAVE_VSNPRINTF
    vsnprintf(buffer,2048,fmt,args);
#else
    vsprintf(buffer,fmt,args); /* ... and hope for the best :( */
    buffer[2047] = 0;
#endif
    if (and_config.to_stdout) {
      fputs(buffer,stdout);
      fflush(stdout);
    } else {
      if (and_config.test) {
        /* log to ./debug.and in test mode */
        fputs(buffer,out);
        fflush(out);
      } else {
        /* write to syslog if in full operations */
        if (!syslog_open) {
          openlog(and_config.program,LOG_PERROR|LOG_PID,LOG_DAEMON);
          syslog_open = 1;
        }
        syslog(LOG_WARNING,"%s",buffer);
      }
    }
  }
  va_end(args);
}


/* Print priority database. */

void print_priorities ()
{
  int i;
  and_printf(0,"Priority database:\n");
  and_printf(0,"UID:   GID:   Command               Parent:                             NLs:\n");
  for (i=0; i<and_db.n; i++) {
    and_printf(0,"%5i  %5i  %-20s  %-20s %-13s  %2i,%2i,%2i\n",
	       and_db.entry[i].uid, and_db.entry[i].gid,
	       and_db.entry[i].command_str, 
               and_db.entry[i].parent_str,
               (and_db.entry[i].parentmode == PARENT_ONLY ? "(parent)" : "(ancestors)"),
               and_db.entry[i].nl[0],
	       and_db.entry[i].nl[1], and_db.entry[i].nl[2]);
  }
  and_printf(0,"%i entries.\n\n",and_db.n);
}


/* Print configuration parameters. */

void print_config ()
{
  and_printf(0,"Configuration parameters:\n"
	     "host name:            %s\n"
	     "operational mode:     %s\n"
	     "verbosity:             %2i\n"
	     "default nicelevel:     %2i\n"
	     "interval     [sec]:   %3u\n"
	     "level 0 from [sec]:   %3u\n"
	     "level 1 from [sec]:   %3u\n"
	     "level 2 from [sec]:   %3u\n"
             "minimum uid:          %i\n"
             "minimum gid:          %i\n"
	     "affinity:             %s\n"
	     "          U: %i\n"
	     "          G: %i\n"
	     "          C: %i\n"
	     "          P: %i\n\n",
	     and_config.hostname, 
	     (and_config.test?"just checkin'":"I'm serious."),
	     and_config.verbose,
	     and_config.nice_default, and_config.interval,
	     and_config.time_mark[0], and_config.time_mark[1],
	     and_config.time_mark[2], 
             and_config.min_uid, and_config.min_gid,
             and_config.affinity,
	     and_config.weight[PRI_U], and_config.weight[PRI_G],
	     and_config.weight[PRI_C], and_config.weight[PRI_P]);
}


/* Parse one line of the priority database */

void read_priorities ()
{
  FILE *priority;
  int bad_count, line_count;
  char buffer [1024];
  /* entry field */
  int uid;
  char uid_s [1024];
  int gid;
  char gid_s [1024];
  char command [1024];
  int parentmode;
  char parent [1024];
  char parent_s [1024];
  int nl0, nl1, nl2;
  /* auxillary structs */
  struct passwd *lookup_p;
  struct group *lookup_g;
  int error;
  char error_msg [1024];
  int i, entry;
  int linelen;
  regex_t *rex;
  bool section_matches = true;

  if ((priority = fopen(and_config.database_file,"rt")) == 0) {
    and_printf(0,"Priority database %s not found. Aborting.\n",
	       and_config.database_file);
    abort();
  }
  and_printf(0,"Priority database is: %s\n", and_config.database_file);
  /* Read file line by line */
  line_count = bad_count = 0;
  and_db.n = 0;
  while (!feof(priority)) {
    memset(buffer,0,1024);
    if (fgets(buffer,1022,priority) == 0) break;
    line_count++;
    /* Intercept empty lines, comments, and overflows */
    linelen = strlen(buffer);
    if (linelen == 0) {
      continue;
    }
    if (buffer[0] == 10 || buffer[0] == 13 || buffer[0] == '#') {
      continue;
    }
    if (linelen > 1022) {
      and_printf(0,"Priority database line %i too long: %s\n",
		 line_count, buffer);
      bad_count++;
      continue;
    }
    /* Handle host-specific parts */
    if ((buffer[0] == 'o') && (buffer[1] == 'n') && (buffer[2] == ' ')) {
      while (buffer[strlen(buffer)-1] < 32) {
	buffer[strlen(buffer)-1] = 0;
      }
      rex = (regex_t*)malloc(sizeof(regex_t));
      regcomp(rex,&buffer[3],REG_NOSUB|REG_EXTENDED);
      section_matches = (regexec(rex,and_config.hostname,0,0,0) == 0);
      and_printf(0,"Priority database line %i: section for host(s) %s will be %s.\n",
		 line_count, &buffer[3], (section_matches?"read":"skipped"));
      regfree(rex);
      continue;
    }
    if (!section_matches) {
      continue;
    }
    i = sscanf(buffer, "%s %s %s %s %i %i %i",
	       uid_s, gid_s, command, parent_s, &nl0, &nl1, &nl2);
    if (i != 7) {
      and_printf(0,"Priority database line %i is invalid: %s\n",
		 line_count, buffer);
      bad_count++;
      continue;
    }
    /* Identify UID */
    if (strcmp(uid_s,"*") == 0) {
      uid = -1;
    } else if ((lookup_p = getpwnam(uid_s)) != 0) {
      uid = lookup_p->pw_uid;
    } else if ((i = atoi(uid_s)) > 0) {
      uid = i;
    } else {
      and_printf(0,"Priority database line %i with invalid UID: %s\n",
		 line_count, uid_s);
      bad_count++;
      continue;
    }
    /* Identify GID */
    if (strcmp(gid_s,"*") == 0) {
      gid = -1;
    } else if ((lookup_g = getgrnam(gid_s)) != 0) {
      gid = lookup_g->gr_gid;
    } else if ((i = atoi(gid_s)) > 0) {
      gid = i;
    } else {
      and_printf(0,"Priority database line %i with invalid GID: %s\n",
		 line_count, gid_s);
      bad_count++;
      continue;
    }
    /* figure parent mode */
    if (strcmp(parent_s,"*") == 0) {
      strcpy(parent,"*");
      parentmode = PARENT_ONLY;
    } else if (strncmp(parent_s,PARENT_ONLY_KEYWORD,
                strlen(PARENT_ONLY_KEYWORD)) == 0) {
      strcpy(parent,&parent_s[strlen(PARENT_ONLY_KEYWORD)]);
      parentmode = PARENT_ONLY;
    } else if (strncmp(parent_s,PARENT_AND_ANCHESTORS_KEYWORD,
                       strlen(PARENT_AND_ANCHESTORS_KEYWORD)) == 0) {
      strcpy(parent,&parent_s[strlen(PARENT_AND_ANCHESTORS_KEYWORD)]);
      parentmode = PARENT_AND_ANCHESTORS;
    } else {
      and_printf(0,"Priority database line %i with bad parent keyword: %s\n",
		 line_count, parent_s);
      bad_count++;
      continue;
    }
    /* Find entry in database */
    entry = and_db.n;
    for (i=0; i<and_db.n; ++i) {
      if (and_db.entry[i].uid == uid && and_db.entry[i].gid == gid
	  && strcmp(and_db.entry[i].command_str,command) == 0
          && strcmp(and_db.entry[i].parent_str,parent) == 0) {
	entry = i;
	break;
      }
    }
    /* If not recycling an entry (i.e. overwriting the priorities),
       rebuild the regular expression */
    if (!and_db.entry[entry].command) {
      and_db.entry[entry].uid = uid;
      and_db.entry[entry].gid = gid;
      and_db.entry[entry].command = (regex_t*)malloc(sizeof(regex_t));
      error = regcomp(and_db.entry[entry].command,command,REG_NOSUB);
      if (error) {
	regerror(error,and_db.entry[entry].command,error_msg,1023);
	regfree(and_db.entry[entry].command);
	free(and_db.entry[entry].command);
	and_db.entry[entry].command = NULL;
	and_printf(0,"Priority database line %i with bad command regexp %s (%s)\n",
		   line_count, command, error_msg);
	bad_count++;
	continue;
      }
      strncpy(and_db.entry[entry].command_str,command,127);
      and_db.entry[entry].command_str[127] = 0;
      and_db.entry[entry].parent = (regex_t*)malloc(sizeof(regex_t));
      error = regcomp(and_db.entry[entry].parent,parent,REG_NOSUB);
      if (error) {
	regerror(error,and_db.entry[entry].parent,error_msg,1023);
	regfree(and_db.entry[entry].parent);
	free(and_db.entry[entry].parent);
	and_db.entry[entry].parent = NULL;
	and_printf(0,"Priority database line %i with bad parent regexp %s (%s)\n",
		   line_count, parent, error_msg);
	bad_count++;
	continue;
      }
      strncpy(and_db.entry[entry].parent_str,parent,127);
      and_db.entry[entry].parent_str[127] = 0;
      and_db.entry[entry].parentmode = parentmode;
    }
    and_db.entry[entry].nl[0] = nl0;
    and_db.entry[entry].nl[1] = nl1;
    and_db.entry[entry].nl[2] = nl2;
    if (entry == and_db.n) {
      and_db.n++;
    }
  }
  /* cleanup */
  fclose(priority);
  if (and_config.verbose > 1) {
    print_priorities();
  }
  if (bad_count) {
    and_printf(0,"Priority database contains %i bad lines. Aborting.\n",
	       bad_count);
    abort();
  }
}


void read_config ()
{
  FILE *f;
  int i, val, bad, bad_f, line, u, g, c, p;
  unsigned uval;
  char buffer [1024];
  char param [1024];
  char value [1024];
  regex_t *rex;
  bool section_matches = true;
  if ((f = fopen(and_config.config_file,"rt")) == 0) {
    and_printf(0,"Configuration file %s not found. Aborting.\n",
	       and_config.config_file);
    abort();
  }
  and_printf(0,"Configuration file is: %s\n", and_config.config_file);
  /* Set defaults */
  strcpy(and_config.affinity,"ugcp");
  and_config.weight[PRI_U] = 8;
  and_config.weight[PRI_G] = 4;
  and_config.weight[PRI_C] = 2;
  and_config.weight[PRI_P] = 1;
  and_config.time_mark[0] = 120;   /*  2 min */
  and_config.time_mark[1] = 1200;  /* 20 min */
  and_config.time_mark[2] = 3600;  /* 60 min */
  /* Read file line by line */
  line = 0;
  bad = 0;
  fgets(buffer,1023,f);
  while (!feof(f)) {
    ++line;
    if (buffer[0] == 10 || buffer[0] == 13 || buffer[0] == '#') {
      memset(buffer,0,1024);
      if (fgets(buffer,1022,f) == 0) break;
      continue;
    }
    if ((buffer[0] == 'o') && (buffer[1] == 'n') && (buffer[2] == ' ')) {
      while (buffer[strlen(buffer)-1] < 32) {
	buffer[strlen(buffer)-1] = 0;
      }
      rex = (regex_t*)malloc(sizeof(regex_t));
      regcomp(rex,&buffer[3],REG_NOSUB|REG_EXTENDED);
      section_matches = (regexec(rex,and_config.hostname,0,0,0) == 0);
      and_printf(0,"Configuration file line %i: section for host(s) %s will be %s.\n",
		 line, &buffer[3], (section_matches?"read":"skipped"));
      regfree(rex);
      buffer[0] = '#'; /* trigger read next line */
      continue;
    }
    if (!section_matches) {
      buffer[0] = '#'; /* trigger read next line */
      continue;
    }
    if (sscanf(buffer,"%s %s",param,value) != 2) {
      ++bad;
      and_printf(0,"Configuration file line %i is invalid: %s\n",
		 line, buffer);
      memset(buffer,0,1024);
      if (fgets(buffer,1022,f) == 0) break;
      continue;
    }
    if (sscanf(value,"%i",&val) != 1) val = -1;
    if (sscanf(value,"%u",&uval) != 1) uval = UINT_MAX;
    if (strcmp(param,"defaultnice")==0) {
	if (val > -1) /* Prohibits a default is kill policy */
	and_config.nice_default = val;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for defaultnice: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"interval")==0) {
      if (and_config.lock_interval) {
	and_printf(0,"Configuration file line %i: interval locked by -i command-line option.\n",
		   line);
      } else {
	if (uval < UINT_MAX)
	  and_config.interval = uval;
	else {
	  ++bad;
	  and_printf(0,"Configuration file line %i has invalid value for interval: %s.\n",
		     line, value);
	}
      }
    } else if (strcmp(param,"minuid")==0) {
      if (uval < UINT_MAX)
	and_config.min_uid = uval;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for minuid: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"mingid")==0) {
      if (uval < UINT_MAX)
	and_config.min_gid = uval;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for mingid: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"lv1time")==0) {
      if (uval < UINT_MAX)
	and_config.time_mark[0] = uval;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for lv1time: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"lv2time")==0) {
      if (uval < UINT_MAX)
	and_config.time_mark[1] = uval;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for lv2time: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"lv3time")==0) {
      if (uval < UINT_MAX)
	and_config.time_mark[2] = uval;
      else {
	++bad;
	and_printf(0,"Configuration file line %i has invalid value for lv3time: %s.\n",
		   line, value);
      }
    } else if (strcmp(param,"affinity")==0) {
      bad_f = -1;
      u = g = c = p = 0;
      if (strlen(value) != 4) {
	  and_printf(0,"Configuration file line %i has invalid affinity: %s.\n",
		     line, value);
        ++bad;
      } else {
        for (i=0; i<4; i++) {
          switch(value[3-i]) {
	  case 'u':
	    if (!u) u = and_config.weight[PRI_U] = 1 << i;
	    else bad_f = i;
	    break;
	  case 'g':
	    if (!g) g = and_config.weight[PRI_G] = 1 << i;
	    else bad_f = i;
	    break;
	  case 'c':
	    if (!c) c = and_config.weight[PRI_C] = 1 << i;
	    else bad_f = i;
	    break;
	  case 'p':
	    if (!p) p = and_config.weight[PRI_P] = 1 << i;
	    else bad_f = i;
	    break;
	  default:
	    bad_f = 3-i;
	  }
        }
        if (bad_f > -1) {
          and_printf(0,"Configuration file line %i has invalid affinity: %s[%i]=%c.\n",
                     line, value, bad_f, value[bad_f]);
          ++bad;
        } else {
          strncpy(and_config.affinity,value,4);
          and_config.affinity[4] = 0;
        }
      }
    } else {
      ++bad;
      and_printf(0,"Configuration file line %i has invalid parameter: %s.\n",
		 line, param);
    }
    memset(buffer,0,1024);
    if (fgets(buffer,1022,f) == 0) break;
  }
  /* Cleanup, exit on errors. */
  fclose(f);
  if (and_config.verbose > 1) print_config();
  if (bad) {
    and_printf(0,"Configuration file contains %i bad lines. Aborting.\n",
	       bad);
    abort();
  }
}


/* Compute new nice level for given command/uid/gid/utime */

int and_getnice (int uid, int gid, char *command, struct and_procent *parent, unsigned cpu_seconds)
{
  int i, level, entry, exact = -1, last;
  struct and_procent *par;
  int exactness [PRI_MAXENTRIES];
  if (!command) {
    and_printf(0,"Process without command string encountered. Aborting.\n");
    abort();
  }
  if (uid == 0) {
    and_printf(3,"root is untouchable: %s\n", command);
    return 0;
  }
  if (uid < and_config.min_uid) {
    and_printf(3,"uid %i is untouchable: %s\n", uid, command);
    return 0;
  }
  if (gid < and_config.min_gid) {
    and_printf(3,"gid %i is untouchable: %s\n", gid, command);
    return 0;
  }
  
  /* Strategy: each priority database accumulates accuracy points
     for every aspect: user, group, command, parent. An exact hit is 
     worth the configured weight of the aspect (1, 2, 4, 8); a joker
     is worth 0; and a miss is with -MAXINT, effectively eliminating
     the entry (veto). At the end, the highest rated entry is
      used to determine the new nice level. */
  for (i=0; i<and_db.n; i++) {
    /* user id */
    if (uid == and_db.entry[i].uid) {
      exactness[i] = and_config.weight[PRI_U];
    } else if (and_db.entry[i].uid == -1) {
      exactness[i] = 0;
    } else {
      exactness[i] = -MAXINT;
    }
    /* group id */
    if (gid == and_db.entry[i].gid) {
      exactness[i] += and_config.weight[PRI_G];
    } else if (and_db.entry[i].gid == -1) {
      exactness[i] += 0;
    } else {
      exactness[i] = -MAXINT;
    }
    /* command */
    if (command!=NULL && regexec(and_db.entry[i].command,command,0,0,0) == 0) {
      exactness[i] += and_config.weight[PRI_C];
    } else if (strcmp(and_db.entry[i].command_str,"*") == 0) {
      exactness[i] += 0;
    } else {
      exactness[i] = -MAXINT;
    }
    /* parent */
    par = parent;
    while (par != NULL)
    {
      last = (and_db.entry[i].parentmode == PARENT_ONLY || 
              par->parent == NULL);
      if (regexec(and_db.entry[i].parent,par->command,0,0,0) == 0) {
        exactness[i] += and_config.weight[PRI_P];
        break;
      } else if (last && strcmp(and_db.entry[i].parent_str,"*") == 0) {
        exactness[i] += 0;
        break;
      } else if (last) {
        exactness[i] = -MAXINT;
        break;
      }
      par = par->parent;
    }
  }
  entry = 0;
  exact = -1;
  for (i=0; i<and_db.n; i++) {
    if (exactness[i] >= exact) { 
      /* >exact -> first entry wins, >=exact -> last entry wins */
      entry = i;
      exact = exactness[i];
    }
  }
  if (exact < 0) {
    and_printf(2,"no match for uid=%i gid=%i cmd=%s\n par=%s\n",
               uid, gid, command, (parent!=NULL?parent->command:"(orphan)"));
    return and_config.nice_default;
  }
  level = 2;
  while (level >= 0 && and_config.time_mark[level] > cpu_seconds) {
    --level;
  }
  and_printf(2,"command=%s (%i,%i,%s) hit on entry=%i, exactness=%i, level=%i.\n",
             command, uid, gid, (parent!=NULL?parent->command:"(orphan)"), 
             entry, exact, level);
  return (level >= 0 ? and_db.entry[entry].nl[level] : 0);
}



/**********************************************************************

 **********************************************************************/



static struct and_procent *(*and_getfirst)() = NULL;
static struct and_procent *(*and_getnext)() = NULL;


void and_setprocreader (struct and_procent *(*getfirst)(), 
			struct and_procent *(*getnext)())
{
  and_getfirst = getfirst;
  and_getnext = getnext;
}


struct and_procent* and_find_proc (struct and_procent *head, int ppid)
{
  struct and_procent *current = head;
  while (current != NULL)
  {
    if (current->pid == ppid)
      return current;
    current = current->next;
  }
  and_printf(1,"no parent for ppid: %d\n", ppid);
  return NULL;
}


void and_loop ()
{
  struct and_procent *head, *current, *new, *proc;
  int newnice;
  int njobs = 0;
  assert(and_getfirst != NULL);
  assert(and_getnext != NULL);
  head = NULL;
  current = NULL;
  proc = and_getfirst();
  while (proc != NULL) {
    new = (struct and_procent*)malloc(sizeof(struct and_procent));
    memcpy(new,proc,sizeof(struct and_procent));
    new->next = NULL;
    if (current != NULL) {
      current->next = new;
    } else {
      head = new;
    }
    current = new;
    proc = and_getnext();
  }
  current = head;
  while (current != NULL) {
    if (current->pid != current->ppid)
      current->parent = and_find_proc(head,current->ppid);
    else
      current->parent = NULL;
    and_printf(2, "process %s parent : %s\n", current->command,
             (current->parent != NULL ? current->parent->command : "(none)"));
    current = current->next;
  }
  current = head;
  while (current != NULL) {
    njobs++;
    newnice = and_getnice(current->uid,current->gid,current->command,
                          current->parent,current->utime);
    if (current->uid != 0) {
      if (newnice) {
	if (newnice > 0) {
	  if (newnice > current->nice) {
	    if (and_config.test)
	      and_printf(0,"would renice to %i: %i (%s)\n",newnice,current->pid,
			 current->command);
	    else {
	      and_printf(1,"renice to %i: %i (%s)\n",newnice,current->pid,
			 current->command);
	      setpriority(PRIO_PROCESS,current->pid,newnice);
	    }
	  }
	} else {
	  if (and_config.test)
	    and_printf(0,"would kill %i %i (%s)\n",newnice,current->pid,
		       current->command);
	  else {
	    and_printf(1,"kill %i %i (%s)\n",newnice,current->pid,
                       current->command);
	    kill(current->pid,-newnice);
	  }
	}
      }
    }
    current = current->next;
  }
  current = head;
  while (current != NULL) {
    proc = current;
    current = current->next;
    free(proc);
  }
}


void and_getopt (int argc, char** argv)
{
#define OPTIONS "c:d:i:vstxfh"
  int opt, value;
  opt = getopt(argc,argv,OPTIONS);
  while (opt != -1) {
    switch(opt) {
    case 'c':
      and_config.config_file = (char*)malloc(strlen(optarg)+1);
      assert(and_config.config_file);
      strcpy(and_config.config_file,optarg);
      break;
    case 'd':
      and_config.database_file = (char*)malloc(strlen(optarg)+1);
      assert(and_config.database_file);
      strcpy(and_config.database_file,optarg);
      break;
    case 'i':
      value = atoi(optarg);
      if (value > 0) {
	and_config.lock_interval = true;
	and_config.interval = value;
      } else {
	fprintf(stderr,"%s: illegal interval: %s\n",argv[0],optarg);
	exit(1);
      }
      break;
    case 's':
      and_config.to_stdout = 1;
      break;
    case 'v':
      ++and_config.verbose;
      break;
    case 't':
      and_config.test = 1;
      break;
    case 'x':
      and_config.test = 0;
      break;
    case 'f':
      and_config.foreground = 1;
      break;
    case 'h':
      printf("auto nice daemon version %s (%s)\n"
	     "%s [-v] [-s]  [-t] [-x] [-c configfile] [-d databasefile] [-i interval]\n"
	     "-v: verbosity -v, -vv, -vvv etc\n"
	     "-s: log to stdout (default is syslog, or debug.and)\n"
	     "-x: really execute renices and kills (default)\n"
             "-f: don't daemonize, stay in foreground\n"
	     "-t: test configuration (don't really renice)\n"
	     "-i interval: loop interval in seconds (default %i)\n"
	     "-c configfile: specify config file (default %s)\n"
	     "-d databasefile: specify priority database file (default %s)\n"
	     ,AND_VERSION,AND_DATE,argv[0],
	     DEFAULT_INTERVAL, DEFAULT_CONFIG_FILE, DEFAULT_DATABASE_FILE);
      exit(1);
    default:
      fprintf(stderr,"Try %s -h for help.\n", argv[0]);
      exit(1);
    }
    opt = getopt(argc,argv,OPTIONS);
  }
#undef OPTIONS
}


static int g_reload_conf;


void and_trigger_readconf (int sig)
{
  g_reload_conf = (sig == SIGHUP);
}


void and_readconf ()
{
  and_printf(0,"Re-reading configuration and priority database...\n");
  read_config();
  read_priorities();
  g_reload_conf = 0;
}


void and_worker ()
{
  read_config();
  read_priorities();
  signal(SIGHUP,and_trigger_readconf);
  and_printf(0,"AND ready.\n");
  g_reload_conf = 0;
  while (1) {
    if (g_reload_conf) {
      and_readconf();
    }
    and_loop();
    sleep(and_config.interval);
  }
}


int and_main (int argc, char** argv)
{
  set_defaults(argc,argv);
  and_getopt(argc,argv);
  if (and_config.test) {
    and_worker();
  } else {
    if (and_config.foreground) {
      and_worker();
    } else {
      if (fork() == 0) and_worker();
    }
  }
  return 0;
}