summaryrefslogtreecommitdiffstats
path: root/bin/ps/ps.c
blob: 9c645694915c6cd03db9d45a23157c160907b266 (plain)
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
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
/*-
 * Copyright (c) 1990, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ------+---------+---------+-------- + --------+---------+---------+---------*
 * Copyright (c) 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
 * All rights reserved.
 *
 * Significant modifications made to bring `ps' options somewhat closer
 * to the standard for `ps' as described in SingleUnixSpec-v3.
 * ------+---------+---------+-------- + --------+---------+---------+---------*
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1990, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#if 0
#ifndef lint
static char sccsid[] = "@(#)ps.c	8.4 (Berkeley) 4/2/94";
#endif /* not lint */
#endif

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <kvm.h>
#include <limits.h>
#include <locale.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "ps.h"

#define	W_SEP	" \t"		/* "Whitespace" list separators */
#define	T_SEP	","		/* "Terminate-element" list separators */

#ifdef LAZY_PS
#define	DEF_UREAD	0
#define	OPT_LAZY_f	"f"
#else
#define	DEF_UREAD	1	/* Always do the more-expensive read. */
#define	OPT_LAZY_f		/* I.e., the `-f' option is not added. */
#endif

int	 cflag;			/* -c */
int	 eval;			/* Exit value */
time_t	 now;			/* Current time(3) value */
int	 rawcpu;		/* -C */
int	 sumrusage;		/* -S */
int	 termwidth;		/* Width of the screen (0 == infinity). */
int	 totwidth;		/* Calculated-width of requested variables. */

struct varent *vhead;

static int	 forceuread = DEF_UREAD; /* Do extra work to get u-area. */
static kvm_t	*kd;
static KINFO	*kinfo;
static int	 needcomm;	/* -o "command" */
static int	 needenv;	/* -e */
static int	 needuser;	/* -o "user" */
static int	 optfatal;	/* Fatal error parsing some list-option. */

static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;

struct listinfo;
typedef	int	addelem_rtn(struct listinfo *_inf, const char *_elem);

struct listinfo {
	int		 count;
	int		 maxcount;
	int		 elemsize;
	addelem_rtn	*addelem;
	const char	*lname;
	union {
		gid_t	*gids;
		pid_t	*pids;
		dev_t	*ttys;
		uid_t	*uids;
		void	*ptr;
	} l;
};

static int	 addelem_gid(struct listinfo *, const char *);
static int	 addelem_pid(struct listinfo *, const char *);
static int	 addelem_tty(struct listinfo *, const char *);
static int	 addelem_uid(struct listinfo *, const char *);
static void	 add_list(struct listinfo *, const char *);
static void	 dynsizevars(KINFO *);
static void	*expand_list(struct listinfo *);
static const char *
		 fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int),
		    KINFO *, char *, int);
static void	 free_list(struct listinfo *);
static void	 init_list(struct listinfo *, addelem_rtn, int, const char *);
static char	*kludge_oldps_options(char *);
static int	 pscomp(const void *, const void *);
static void	 saveuser(KINFO *);
static void	 scanvars(void);
static void	 sizevars(void);
static void	 usage(void);

static char dfmt[] = "pid,tt,state,time,command";
static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command";
static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state,"
			"tt,time,command";
static char   o1[] = "pid";
static char   o2[] = "tt,state,time,command";
static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command";
static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,"
			"%cpu,%mem,command";
static char Zfmt[] = "label";

#define	PS_ARGS	"AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ"

int
main(int argc, char *argv[])
{
	struct listinfo gidlist, pgrplist, pidlist;
	struct listinfo ruidlist, sesslist, ttylist, uidlist;
	struct kinfo_proc *kp;
	struct varent *vent;
	struct winsize ws;
	const char *cp, *nlistf, *memf;
	char *cols;
	int all, ch, dropgid, elem, flag, _fmt, i, lineno;
	int nentries, nocludge, nkept, nselectors;
	int prtheader, showthreads, wflag, what, xkeep, xkeep_implied;
	char errbuf[_POSIX2_LINE_MAX];

	(void) setlocale(LC_ALL, "");
	time(&now);			/* Used by routines in print.c. */

	if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0')
		termwidth = atoi(cols);
	else if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
	     ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
	     ioctl(STDIN_FILENO,  TIOCGWINSZ, (char *)&ws) == -1) ||
	     ws.ws_col == 0)
		termwidth = 79;
	else
		termwidth = ws.ws_col - 1;

	/*
	 * Don't apply a kludge if the first argument is an option taking an
	 * argument
	 */
	if (argc > 1) {
		nocludge = 0;
		if (argv[1][0] == '-') {
			for (cp = PS_ARGS; *cp != '\0'; cp++) {
				if (*cp != ':')
					continue;
				if (*(cp - 1) == argv[1][1]) {
					nocludge = 1;
					break;
				}
			}
		}
		if (nocludge == 0)
			argv[1] = kludge_oldps_options(argv[1]);
	}

	all = dropgid = _fmt = nselectors = optfatal = 0;
	prtheader = showthreads = wflag = xkeep_implied = 0;
	xkeep = -1;			/* Neither -x nor -X. */
	init_list(&gidlist, addelem_gid, sizeof(gid_t), "group");
	init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group");
	init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id");
	init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser");
	init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id");
	init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty");
	init_list(&uidlist, addelem_uid, sizeof(uid_t), "user");
	memf = nlistf = _PATH_DEVNULL;
	while ((ch = getopt(argc, argv, PS_ARGS)) != -1)
		switch((char)ch) {
		case 'A':
			/*
			 * Exactly the same as `-ax'.   This has been
			 * added for compatability with SUSv3, but for
			 * now it will not be described in the man page.
			 */
			nselectors++;
			all = xkeep = 1;
			break;
		case 'a':
			nselectors++;
			all = 1;
			break;
		case 'C':
			rawcpu = 1;
			break;
		case 'c':
			cflag = 1;
			break;
		case 'e':			/* XXX set ufmt */
			needenv = 1;
			break;
#ifdef LAZY_PS
		case 'f':
			if (getuid() == 0 || getgid() == 0)
				forceuread = 1;
			break;
#endif
		case 'G':
			add_list(&gidlist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
		case 'g':
#if 0
			/*-
			 * XXX - This SUSv3 behavior is still under debate
			 *	since it conflicts with the (undocumented)
			 *	`-g' option.  So we skip it for now.
			 */
			add_list(&pgrplist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
#else
			/* The historical BSD-ish (from SunOS) behavior. */
			break;			/* no-op */
#endif
		case 'H':
			showthreads = KERN_PROC_INC_THREAD;
			break;
		case 'h':
			prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
			break;
		case 'j':
			parsefmt(jfmt, 0);
			_fmt = 1;
			jfmt[0] = '\0';
			break;
		case 'L':
			showkey();
			exit(0);
		case 'l':
			parsefmt(lfmt, 0);
			_fmt = 1;
			lfmt[0] = '\0';
			break;
		case 'M':
			memf = optarg;
			dropgid = 1;
			break;
		case 'm':
			sortby = SORTMEM;
			break;
		case 'N':
			nlistf = optarg;
			dropgid = 1;
			break;
		case 'O':
			parsefmt(o1, 1);
			parsefmt(optarg, 1);
			parsefmt(o2, 1);
			o1[0] = o2[0] = '\0';
			_fmt = 1;
			break;
		case 'o':
			parsefmt(optarg, 1);
			_fmt = 1;
			break;
		case 'p':
			add_list(&pidlist, optarg);
			/*
			 * Note: `-p' does not *set* xkeep, but any values
			 * from pidlist are checked before xkeep is.  That
			 * way they are always matched, even if the user
			 * specifies `-X'.
			 */
			nselectors++;
			break;
#if 0
		case 'R':
			/*-
			 * XXX - This un-standard option is still under
			 *	debate.  This is what SUSv3 defines as
			 *	the `-U' option, and while it would be
			 *	nice to have, it could cause even more
			 *	confusion to implement it as `-R'.
			 */
			add_list(&ruidlist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
#endif
		case 'r':
			sortby = SORTCPU;
			break;
		case 'S':
			sumrusage = 1;
			break;
#if 0
		case 's':
			/*-
			 * XXX - This non-standard option is still under
			 *	debate.  This *is* supported on Solaris,
			 *	Linux, and IRIX, but conflicts with `-s'
			 *	on NetBSD and maybe some older BSD's.
			 */
			add_list(&sesslist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
#endif
		case 'T':
			if ((optarg = ttyname(STDIN_FILENO)) == NULL)
				errx(1, "stdin: not a terminal");
			/* FALLTHROUGH */
		case 't':
			add_list(&ttylist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
		case 'U':
			/* This is what SUSv3 defines as the `-u' option. */
			add_list(&uidlist, optarg);
			xkeep_implied = 1;
			nselectors++;
			break;
		case 'u':
			parsefmt(ufmt, 0);
			sortby = SORTCPU;
			_fmt = 1;
			ufmt[0] = '\0';
			break;
		case 'v':
			parsefmt(vfmt, 0);
			sortby = SORTMEM;
			_fmt = 1;
			vfmt[0] = '\0';
			break;
		case 'w':
			if (wflag)
				termwidth = UNLIMITED;
			else if (termwidth < 131)
				termwidth = 131;
			wflag++;
			break;
		case 'X':
			/*
			 * Note that `-X' and `-x' are not standard "selector"
			 * options. For most selector-options, we check *all*
			 * processes to see if any are matched by the given
			 * value(s).  After we have a set of all the matched
			 * processes, then `-X' and `-x' govern whether we
			 * modify that *matched* set for processes which do
			 * not have a controlling terminal.  `-X' causes
			 * those processes to be deleted from the matched
			 * set, while `-x' causes them to be kept.
			 */
			xkeep = 0;
			break;
		case 'x':
			xkeep = 1;
			break;
		case 'Z':
			parsefmt(Zfmt, 0);
			Zfmt[0] = '\0';
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;
	if (optfatal)
		exit(1);		/* Error messages already printed. */
	if (xkeep < 0)			/* Neither -X nor -x was specified. */
		xkeep = xkeep_implied;

#define	BACKWARD_COMPATIBILITY
#ifdef	BACKWARD_COMPATIBILITY
	if (*argv) {
		nlistf = *argv;
		if (*++argv)
			memf = *argv;
	}
#endif
	/*
	 * Discard setgid privileges if not the running kernel so that bad
	 * guys can't print interesting stuff from kernel memory.
	 */
	if (dropgid) {
		setgid(getgid());
		setuid(getuid());
	}

	kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
	if (kd == 0)
		errx(1, "%s", errbuf);

	if (!_fmt)
		parsefmt(dfmt, 0);

	if (nselectors == 0) {
		uidlist.l.ptr = malloc(sizeof(uid_t));
		if (uidlist.l.ptr == NULL)
			errx(1, "malloc failed");
		nselectors = 1;
		uidlist.count = uidlist.maxcount = 1;
		*uidlist.l.uids = getuid();
	}

	/*
	 * scan requested variables, noting what structures are needed,
	 * and adjusting header widths as appropriate.
	 */
	scanvars();

	/*
	 * Get process list.  If the user requested just one selector-
	 * option, then kvm_getprocs can be asked to return just those
	 * processes.  Otherwise, have it return all processes, and
	 * then this routine will search that full list and select the
	 * processes which match any of the user's selector-options.
	 */
	what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC;
	flag = 0;
	if (nselectors == 1) {
		/* XXX - Apparently there's no KERN_PROC_GID flag. */
		if (pgrplist.count == 1) {
			what = KERN_PROC_PGRP | showthreads;
			flag = *pgrplist.l.pids;
			nselectors = 0;
		} else if (pidlist.count == 1) {
			what = KERN_PROC_PID | showthreads;
			flag = *pidlist.l.pids;
			nselectors = 0;
		} else if (ruidlist.count == 1) {
			what = KERN_PROC_RUID | showthreads;
			flag = *ruidlist.l.uids;
			nselectors = 0;
#if 0
		/*-
		 * XXX - KERN_PROC_SESSION causes error in kvm_getprocs?
		 *	For now, always do sid-matching in this routine.
		 */
		} else if (sesslist.count == 1) {
			what = KERN_PROC_SESSION | showthreads;
			flag = *sesslist.l.pids;
			nselectors = 0;
#endif
		} else if (ttylist.count == 1) {
			what = KERN_PROC_TTY | showthreads;
			flag = *ttylist.l.ttys;
			nselectors = 0;
		} else if (uidlist.count == 1) {
			what = KERN_PROC_UID | showthreads;
			flag = *uidlist.l.uids;
			nselectors = 0;
		} else if (all) {
			/* No need for this routine to select processes. */
			nselectors = 0;
		}
	}

	/*
	 * select procs
	 */
	nentries = -1;
	kp = kvm_getprocs(kd, what, flag, &nentries);
	if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0))
		errx(1, "%s", kvm_geterr(kd));
	nkept = 0;
	if (nentries > 0) {
		if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
			errx(1, "malloc failed");
		for (i = nentries; --i >= 0; ++kp) {
			/*
			 * If the user specified multiple selection-criteria,
			 * then keep any process matched by the inclusive OR
			 * of all the selection-criteria given.
			 */
			if (pidlist.count > 0) {
				for (elem = 0; elem < pidlist.count; elem++)
					if (kp->ki_pid == pidlist.l.pids[elem])
						goto keepit;
			}
			/*
			 * Note that we had to process pidlist before
			 * filtering out processes which do not have
			 * a controlling terminal.
			 */
			if (xkeep == 0) {
				if ((kp->ki_tdev == NODEV ||
				    (kp->ki_flag & P_CONTROLT) == 0))
					continue;
			}
			if (nselectors == 0)
				goto keepit;
			if (gidlist.count > 0) {
				for (elem = 0; elem < gidlist.count; elem++)
					if (kp->ki_rgid == gidlist.l.gids[elem])
						goto keepit;
			}
			if (pgrplist.count > 0) {
				for (elem = 0; elem < pgrplist.count; elem++)
					if (kp->ki_pgid ==
					    pgrplist.l.pids[elem])
						goto keepit;
			}
			if (ruidlist.count > 0) {
				for (elem = 0; elem < ruidlist.count; elem++)
					if (kp->ki_ruid ==
					    ruidlist.l.uids[elem])
						goto keepit;
			}
			if (sesslist.count > 0) {
				for (elem = 0; elem < sesslist.count; elem++)
					if (kp->ki_sid == sesslist.l.pids[elem])
						goto keepit;
			}
			if (ttylist.count > 0) {
				for (elem = 0; elem < ttylist.count; elem++)
					if (kp->ki_tdev == ttylist.l.ttys[elem])
						goto keepit;
			}
			if (uidlist.count > 0) {
				for (elem = 0; elem < uidlist.count; elem++)
					if (kp->ki_uid == uidlist.l.uids[elem])
						goto keepit;
			}
			/*
			 * This process did not match any of the user's
			 * selector-options, so skip the process.
			 */
			continue;

		keepit:
			kinfo[nkept].ki_p = kp;
			if (needuser)
				saveuser(&kinfo[nkept]);
			dynsizevars(&kinfo[nkept]);
			nkept++;
		}
	}

	sizevars();

	/*
	 * print header
	 */
	printheader();
	if (nkept == 0)
		exit(1);

	/*
	 * sort proc list
	 */
	qsort(kinfo, nkept, sizeof(KINFO), pscomp);
	/*
	 * For each process, call each variable output function.
	 */
	for (i = lineno = 0; i < nkept; i++) {
		for (vent = vhead; vent; vent = vent->next) {
			(vent->var->oproc)(&kinfo[i], vent);
			if (vent->next != NULL)
				(void)putchar(' ');
		}
		(void)putchar('\n');
		if (prtheader && lineno++ == prtheader - 4) {
			(void)putchar('\n');
			printheader();
			lineno = 0;
		}
	}
	free_list(&gidlist);
	free_list(&pidlist);
	free_list(&pgrplist);
	free_list(&ruidlist);
	free_list(&sesslist);
	free_list(&ttylist);
	free_list(&uidlist);

	exit(eval);
}

static int
addelem_gid(struct listinfo *inf, const char *elem)
{
	struct group *grp;
	const char *nameorID;
	char *endp;
	u_long bigtemp;

	if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
		if (*elem == '\0')
			warnx("Invalid (zero-length) %s name", inf->lname);
		else
			warnx("%s name too long: %s", inf->lname, elem);
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}

	/*
	 * SUSv3 states that `ps -G grouplist' should match "real-group
	 * ID numbers", and does not mention group-names.  I do want to
	 * also support group-names, so this tries for a group-id first,
	 * and only tries for a name if that doesn't work.  This is the
	 * opposite order of what is done in addelem_uid(), but in
	 * practice the order would only matter for group-names which
	 * are all-numeric.
	 */
	grp = NULL;
	nameorID = "named";
	errno = 0;
	bigtemp = strtoul(elem, &endp, 10);
	if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) {
		nameorID = "name or ID matches";
		grp = getgrgid((gid_t)bigtemp);
	}
	if (grp == NULL)
		grp = getgrnam(elem);
	if (grp == NULL) {
		warnx("No %s %s '%s'", inf->lname, nameorID, elem);
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}

	if (inf->count >= inf->maxcount)
		expand_list(inf);
	inf->l.gids[(inf->count)++] = grp->gr_gid;
	return (1);
}

#define	BSD_PID_MAX	99999		/* Copy of PID_MAX from sys/proc.h. */
static int
addelem_pid(struct listinfo *inf, const char *elem)
{
	char *endp;
	long tempid;

	if (*elem == '\0')
		tempid = 0L;
	else {
		errno = 0;
		tempid = strtol(elem, &endp, 10);
		if (*endp != '\0' || tempid < 0 || elem == endp) {
			warnx("Invalid %s: %s", inf->lname, elem);
			errno = ERANGE;
		} else if (errno != 0 || tempid > BSD_PID_MAX) {
			warnx("%s too large: %s", inf->lname, elem);
			errno = ERANGE;
		}
		if (errno == ERANGE) {
			optfatal = 1;
			return (0);	/* Do not add this value. */
		}
	}

	if (inf->count >= inf->maxcount)
		expand_list(inf);
	inf->l.pids[(inf->count)++] = tempid;
	return (1);
}
#undef	BSD_PID_MAX

static int
addelem_tty(struct listinfo *inf, const char *elem)
{
	const char *ttypath;
	struct stat sb;
	char pathbuf[PATH_MAX];

	if (strcmp(elem, "co") == 0)
		ttypath = strdup(_PATH_CONSOLE);
	else if (*elem == '/')
		ttypath = elem;
	else {
		strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf));
		strlcat(pathbuf, elem, sizeof(pathbuf));
		ttypath = pathbuf;
	}

	if (stat(ttypath, &sb) == -1) {
		warn("%s", ttypath);
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}
	if (!S_ISCHR(sb.st_mode)) {
		warn("%s: Not a terminal", ttypath);
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}

	if (inf->count >= inf->maxcount)
		expand_list(inf);
	inf->l.ttys[(inf->count)++] = sb.st_rdev;
	return (1);
}

static int
addelem_uid(struct listinfo *inf, const char *elem)
{
	struct passwd *pwd;
	char *endp;
	u_long bigtemp;

	if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
		if (*elem == '\0')
			warnx("Invalid (zero-length) %s name", inf->lname);
		else
			warnx("%s name too long: %s", inf->lname, elem);
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}

	pwd = getpwnam(elem);
	if (pwd == NULL) {
		errno = 0;
		bigtemp = strtoul(elem, &endp, 10);
		if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX)
			warnx("No %s named '%s'", inf->lname, elem);
		else {
			/* The string is all digits, so it might be a userID. */
			pwd = getpwuid((uid_t)bigtemp);
			if (pwd == NULL)
				warnx("No %s name or ID matches '%s'",
				    inf->lname, elem);
		}
	}
	if (pwd == NULL) {
		/*
		 * These used to be treated as minor warnings (and the
		 * option was simply ignored), but now they are fatal
		 * errors (and the command will be aborted).
		 */
		optfatal = 1;
		return (0);		/* Do not add this value. */
	}

	if (inf->count >= inf->maxcount)
		expand_list(inf);
	inf->l.uids[(inf->count)++] = pwd->pw_uid;
	return (1);
}

static void
add_list(struct listinfo *inf, const char *argp)
{
	const char *savep;
	char *cp, *endp;
	int toolong;
	char elemcopy[PATH_MAX];

	while (*argp != '\0') {
		while (*argp != '\0' && strchr(W_SEP, *argp) != NULL)
			argp++;
		savep = argp;
		toolong = 0;
		cp = elemcopy;
		if (strchr(T_SEP, *argp) == NULL) {
			endp = elemcopy + sizeof(elemcopy) - 1;
			while (*argp != '\0' && cp <= endp &&
			    strchr(W_SEP T_SEP, *argp) == NULL)
				*cp++ = *argp++;
			if (cp > endp)
				toolong = 1;
		}
		if (!toolong) {
			*cp = '\0';
#ifndef ADD_PS_LISTRESET
			/*
			 * This is how the standard expects lists to
			 * be handled.
			 */
			inf->addelem(inf, elemcopy);
#else
			/*-
			 * This would add a simple non-standard-but-convienent
			 * feature.
			 *
			 * XXX - The first time I tried to add this check,
			 *	it increased the total size of `ps' by 3940
			 *	bytes on i386!  That's 12% of the entire
			 *	program!  The `ps.o' file grew by only about
			 *	40 bytes, but the final (stripped) executable
			 *	in /bin/ps grew by 12%.  I have not had time
			 *	to investigate, so skip the feature for now.
			 */
			/*
			 * We now have a single element.  Add it to the
			 * list, unless the element is ":".  In that case,
			 * reset the list so previous entries are ignored.
			 */
			if (strcmp(elemcopy, ":") == 0)
				inf->count = 0;
			else
				inf->addelem(inf, elemcopy);
#endif
		} else {
			/*
			 * The string is too long to copy.  Find the end
			 * of the string to print out the warning message.
			 */
			while (*argp != '\0' && strchr(W_SEP T_SEP,
			    *argp) == NULL)
				argp++;
			warnx("Value too long: %.*s", (int)(argp - savep),
			    savep);
			optfatal = 1;
		}
		/*
		 * Skip over any number of trailing whitespace characters,
		 * but only one (at most) trailing element-terminating
		 * character.
		 */
		while (*argp != '\0' && strchr(W_SEP, *argp) != NULL)
			argp++;
		if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) {
			argp++;
			/* Catch case where string ended with a comma. */
			if (*argp == '\0')
				inf->addelem(inf, argp);
		}
	}
}

static void *
expand_list(struct listinfo *inf)
{
	void *newlist;
	int newmax;

	newmax = (inf->maxcount + 1) << 1;
	newlist = realloc(inf->l.ptr, newmax * inf->elemsize);
	if (newlist == NULL) {
		free(inf->l.ptr);
		errx(1, "realloc to %d %ss failed", newmax,
		    inf->lname);
	}
	inf->maxcount = newmax;
	inf->l.ptr = newlist;

	return (newlist);
}

static void
free_list(struct listinfo *inf)
{

	inf->count = inf->elemsize = inf->maxcount = 0;
	if (inf->l.ptr != NULL)
		free(inf->l.ptr);
	inf->addelem = NULL;
	inf->lname = NULL;
	inf->l.ptr = NULL;
}

static void
init_list(struct listinfo *inf, addelem_rtn artn, int elemsize,
    const char *lname)
{

	inf->count = inf->maxcount = 0;
	inf->elemsize = elemsize;
	inf->addelem = artn;
	inf->lname = lname;
	inf->l.ptr = NULL;
}

VARENT *
find_varentry(VAR *v)
{
	struct varent *vent;

	for (vent = vhead; vent; vent = vent->next) {
		if (strcmp(vent->var->name, v->name) == 0)
			return vent;
	}
	return NULL;
}

static void
scanvars(void)
{
	struct varent *vent;
	VAR *v;

	for (vent = vhead; vent; vent = vent->next) {
		v = vent->var;
		if (v->flag & DSIZ) {
			v->dwidth = v->width;
			v->width = 0;
		}
		if (v->flag & USER)
			needuser = 1;
		if (v->flag & COMM)
			needcomm = 1;
	}
}

static void
dynsizevars(KINFO *ki)
{
	struct varent *vent;
	VAR *v;
	int i;

	for (vent = vhead; vent; vent = vent->next) {
		v = vent->var;
		if (!(v->flag & DSIZ))
			continue;
		i = (v->sproc)( ki);
		if (v->width < i)
			v->width = i;
		if (v->width > v->dwidth)
			v->width = v->dwidth;
	}
}

static void
sizevars(void)
{
	struct varent *vent;
	VAR *v;
	int i;

	for (vent = vhead; vent; vent = vent->next) {
		v = vent->var;
		i = strlen(vent->header);
		if (v->width < i)
			v->width = i;
		totwidth += v->width + 1;	/* +1 for space */
	}
	totwidth--;
}

static const char *
fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki,
    char *comm, int maxlen)
{
	const char *s;

	s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen);
	return (s);
}

#define UREADOK(ki)	(forceuread || (ki->ki_p->ki_sflag & PS_INMEM))

static void
saveuser(KINFO *ki)
{

	if (ki->ki_p->ki_sflag & PS_INMEM) {
		/*
		 * The u-area might be swapped out, and we can't get
		 * at it because we have a crashdump and no swap.
		 * If it's here fill in these fields, otherwise, just
		 * leave them 0.
		 */
		ki->ki_valid = 1;
	} else
		ki->ki_valid = 0;
	/*
	 * save arguments if needed
	 */
	if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) {
		ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm,
		    MAXCOMLEN));
	} else if (needcomm) {
		asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm);
	} else {
		ki->ki_args = NULL;
	}
	if (needenv && UREADOK(ki)) {
		ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0));
	} else if (needenv) {
		ki->ki_env = malloc(3);
		strcpy(ki->ki_env, "()");
	} else {
		ki->ki_env = NULL;
	}
}

static int
pscomp(const void *a, const void *b)
{
	const KINFO *ka, *kb;
	double cpua, cpub;
	segsz_t sizea, sizeb;

	ka = a;
	kb = b;
	/* SORTCPU and SORTMEM are sorted in descending order. */
	if (sortby == SORTCPU) {
		cpua = getpcpu(ka);
		cpub = getpcpu(kb);
		if (cpua < cpub)
			return (1);
		if (cpua > cpub)
			return (-1);
	}
	if (sortby == SORTMEM) {
		sizea = ka->ki_p->ki_tsize + ka->ki_p->ki_dsize +
		    ka->ki_p->ki_ssize;
		sizeb = kb->ki_p->ki_tsize + kb->ki_p->ki_dsize +
		    kb->ki_p->ki_ssize;
		if (sizea < sizeb)
			return (1);
		if (sizea > sizeb)
			return (-1);
	}
	/*
	 * TTY's are sorted in ascending order, except that all NODEV
	 * processes come before all processes with a device.
	 */
	if (ka->ki_p->ki_tdev == NODEV && kb->ki_p->ki_tdev != NODEV)
		return (-1);
	if (ka->ki_p->ki_tdev != NODEV && kb->ki_p->ki_tdev == NODEV)
		return (1);
	if (ka->ki_p->ki_tdev < kb->ki_p->ki_tdev)
		return (-1);
	if (ka->ki_p->ki_tdev > kb->ki_p->ki_tdev)
		return (1);
	/* PID's are sorted in ascending order. */
	if (ka->ki_p->ki_pid < kb->ki_p->ki_pid)
		return (-1);
	if (ka->ki_p->ki_pid > kb->ki_p->ki_pid)
		return (1);
	return (0);
}

/*
 * ICK (all for getopt), would rather hide the ugliness
 * here than taint the main code.
 *
 *  ps foo -> ps -foo
 *  ps 34 -> ps -p34
 *
 * The old convention that 't' with no trailing tty arg means the users
 * tty, is only supported if argv[1] doesn't begin with a '-'.  This same
 * feature is available with the option 'T', which takes no argument.
 */
static char *
kludge_oldps_options(char *s)
{
	int have_fmt;
	size_t len;
	char *newopts, *ns, *cp;

	/*
	 * If we have an 'o' option, then note it, since we don't want to do
	 * some types of munging.
	 */
	have_fmt = index(s, 'o') != NULL;

	len = strlen(s);
	if ((newopts = ns = malloc(len + 2)) == NULL)
		errx(1, "malloc failed");
	/*
	 * options begin with '-'
	 */
	if (*s != '-')
		*ns++ = '-';	/* add option flag */
	/*
	 * gaze to end of argv[1]
	 */
	cp = s + len - 1;
	/*
	 * if last letter is a 't' flag with no argument (in the context
	 * of the oldps options -- option string NOT starting with a '-' --
	 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)).
	 *
	 * However, if a flag accepting a string argument is found in the
	 * option string, the remainder of the string is the argument to
	 * that flag; do not modify that argument.
	 */
	if (strcspn(s, "MNOoU") == len && *cp == 't' && *s != '-')
		*cp = 'T';
	else {
		/*
		 * otherwise check for trailing number, which *may* be a
		 * pid.
		 */
		while (cp >= s && isdigit(*cp))
			--cp;
	}
	cp++;
	memmove(ns, s, (size_t)(cp - s));	/* copy up to trailing number */
	ns += cp - s;
	/*
	 * if there's a trailing number, and not a preceding 'p' (pid) or
	 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag.
	 */
	if (isdigit(*cp) &&
	    (cp == s || (cp[-1] != 't' && cp[-1] != 'p')) &&
	    (cp - 1 == s || cp[-2] != 't') && !have_fmt)
		*ns++ = 'p';
	(void)strcpy(ns, cp);		/* and append the number */

	return (newopts);
}

static void
usage(void)
{
#define	SINGLE_OPTS	"[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]"

	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
	    "usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]",
	    "          [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]",
	    "          [-M core] [-N system]",
	    "       ps [-L]");
	exit(1);
}
OpenPOWER on IntegriCloud