1 /*-
2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1990, 1993, 1994\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 04/02/94";
16 #endif /* not lint */
17
18 #include <sys/param.h>
19 #include <sys/user.h>
20 #include <sys/time.h>
21 #include <sys/resource.h>
22 #include <sys/proc.h>
23 #include <sys/stat.h>
24 #include <sys/ioctl.h>
25 #include <sys/sysctl.h>
26
27 #include <ctype.h>
28 #include <err.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <kvm.h>
32 #include <nlist.h>
33 #include <paths.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #include "ps.h"
40
41 #ifdef P_PPWAIT
42 #define NEWVM
43 #endif
44
45 KINFO *kinfo;
46 struct varent *vhead, *vtail;
47
48 int eval; /* exit value */
49 int rawcpu; /* -C */
50 int sumrusage; /* -S */
51 int termwidth; /* width of screen (0 == infinity) */
52 int totwidth; /* calculated width of requested variables */
53
54 static int needuser, needcomm, needenv;
55
56 enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
57
58 static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int),
59 KINFO *, char *, int));
60 static char *kludge_oldps_options __P((char *));
61 static int pscomp __P((const void *, const void *));
62 static void saveuser __P((KINFO *));
63 static void scanvars __P((void));
64 static void usage __P((void));
65
66 char dfmt[] = "pid tt state time command";
67 char jfmt[] = "user pid ppid pgid sess jobc state tt time command";
68 char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command";
69 char o1[] = "pid";
70 char o2[] = "tt state time command";
71 char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command";
72 char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command";
73
74 kvm_t *kd;
75
76 int
main(argc,argv)77 main(argc, argv)
78 int argc;
79 char *argv[];
80 {
81 struct kinfo_proc *kp;
82 struct varent *vent;
83 struct winsize ws;
84 dev_t ttydev;
85 pid_t pid;
86 uid_t uid;
87 int all, ch, flag, i, fmt, lineno, nentries;
88 int prtheader, wflag, what, xflg;
89 char *nlistf, *memf, *swapf, errbuf[256];
90
91 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
92 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
93 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) ||
94 ws.ws_col == 0)
95 termwidth = 79;
96 else
97 termwidth = ws.ws_col - 1;
98
99 if (argc > 1)
100 argv[1] = kludge_oldps_options(argv[1]);
101
102 all = fmt = prtheader = wflag = xflg = 0;
103 pid = -1;
104 uid = (uid_t) -1;
105 ttydev = NODEV;
106 memf = nlistf = swapf = NULL;
107 while ((ch = getopt(argc, argv,
108 "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF)
109 switch((char)ch) {
110 case 'a':
111 all = 1;
112 break;
113 case 'e': /* XXX set ufmt */
114 needenv = 1;
115 break;
116 case 'C':
117 rawcpu = 1;
118 break;
119 case 'g':
120 break; /* no-op */
121 case 'h':
122 prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
123 break;
124 case 'j':
125 parsefmt(jfmt);
126 fmt = 1;
127 jfmt[0] = '\0';
128 break;
129 case 'L':
130 showkey();
131 exit(0);
132 case 'l':
133 parsefmt(lfmt);
134 fmt = 1;
135 lfmt[0] = '\0';
136 break;
137 case 'M':
138 memf = optarg;
139 break;
140 case 'm':
141 sortby = SORTMEM;
142 break;
143 case 'N':
144 nlistf = optarg;
145 break;
146 case 'O':
147 parsefmt(o1);
148 parsefmt(optarg);
149 parsefmt(o2);
150 o1[0] = o2[0] = '\0';
151 fmt = 1;
152 break;
153 case 'o':
154 parsefmt(optarg);
155 fmt = 1;
156 break;
157 case 'p':
158 pid = atol(optarg);
159 xflg = 1;
160 break;
161 case 'r':
162 sortby = SORTCPU;
163 break;
164 case 'S':
165 sumrusage = 1;
166 break;
167 case 'T':
168 if ((optarg = ttyname(STDIN_FILENO)) == NULL)
169 errx(1, "stdin: not a terminal");
170 /* FALLTHROUGH */
171 case 't': {
172 struct stat sb;
173 char *ttypath, pathbuf[MAXPATHLEN];
174
175 if (strcmp(optarg, "co") == 0)
176 ttypath = _PATH_CONSOLE;
177 else if (*optarg != '/')
178 (void)snprintf(ttypath = pathbuf,
179 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg);
180 else
181 ttypath = optarg;
182 if (stat(ttypath, &sb) == -1)
183 err(1, "%s", ttypath);
184 if (!S_ISCHR(sb.st_mode))
185 errx(1, "%s: not a terminal", ttypath);
186 ttydev = sb.st_rdev;
187 break;
188 }
189 case 'u':
190 parsefmt(ufmt);
191 sortby = SORTCPU;
192 fmt = 1;
193 ufmt[0] = '\0';
194 break;
195 case 'v':
196 parsefmt(vfmt);
197 sortby = SORTMEM;
198 fmt = 1;
199 vfmt[0] = '\0';
200 break;
201 case 'W':
202 swapf = optarg;
203 break;
204 case 'w':
205 if (wflag)
206 termwidth = UNLIMITED;
207 else if (termwidth < 131)
208 termwidth = 131;
209 wflag++;
210 break;
211 case 'x':
212 xflg = 1;
213 break;
214 case '?':
215 default:
216 usage();
217 }
218 argc -= optind;
219 argv += optind;
220
221 #define BACKWARD_COMPATIBILITY
222 #ifdef BACKWARD_COMPATIBILITY
223 if (*argv) {
224 nlistf = *argv;
225 if (*++argv) {
226 memf = *argv;
227 if (*++argv)
228 swapf = *argv;
229 }
230 }
231 #endif
232 /*
233 * Discard setgid privileges if not the running kernel so that bad
234 * guys can't print interesting stuff from kernel memory.
235 */
236 if (nlistf != NULL || memf != NULL || swapf != NULL)
237 setgid(getgid());
238
239 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
240 if (kd == 0)
241 errx(1, "%s", errbuf);
242
243 if (!fmt)
244 parsefmt(dfmt);
245
246 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */
247 uid = getuid();
248
249 /*
250 * scan requested variables, noting what structures are needed,
251 * and adjusting header widths as appropiate.
252 */
253 scanvars();
254 /*
255 * get proc list
256 */
257 if (uid != (uid_t) -1) {
258 what = KERN_PROC_UID;
259 flag = uid;
260 } else if (ttydev != NODEV) {
261 what = KERN_PROC_TTY;
262 flag = ttydev;
263 } else if (pid != -1) {
264 what = KERN_PROC_PID;
265 flag = pid;
266 } else {
267 what = KERN_PROC_ALL;
268 flag = 0;
269 }
270 /*
271 * select procs
272 */
273 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0)
274 errx(1, "%s", kvm_geterr(kd));
275 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
276 err(1, NULL);
277 for (i = nentries; --i >= 0; ++kp) {
278 kinfo[i].ki_p = kp;
279 if (needuser)
280 saveuser(&kinfo[i]);
281 }
282 /*
283 * print header
284 */
285 printheader();
286 if (nentries == 0)
287 exit(0);
288 /*
289 * sort proc list
290 */
291 qsort(kinfo, nentries, sizeof(KINFO), pscomp);
292 /*
293 * for each proc, call each variable output function.
294 */
295 for (i = lineno = 0; i < nentries; i++) {
296 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV ||
297 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0))
298 continue;
299 for (vent = vhead; vent; vent = vent->next) {
300 (vent->var->oproc)(&kinfo[i], vent);
301 if (vent->next != NULL)
302 (void)putchar(' ');
303 }
304 (void)putchar('\n');
305 if (prtheader && lineno++ == prtheader - 4) {
306 (void)putchar('\n');
307 printheader();
308 lineno = 0;
309 }
310 }
311 exit(eval);
312 }
313
314 static void
scanvars()315 scanvars()
316 {
317 struct varent *vent;
318 VAR *v;
319 int i;
320
321 for (vent = vhead; vent; vent = vent->next) {
322 v = vent->var;
323 i = strlen(v->header);
324 if (v->width < i)
325 v->width = i;
326 totwidth += v->width + 1; /* +1 for space */
327 if (v->flag & USER)
328 needuser = 1;
329 if (v->flag & COMM)
330 needcomm = 1;
331 }
332 totwidth--;
333 }
334
335 static char *
336 fmt(fn, ki, comm, maxlen)
337 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int));
338 KINFO *ki;
339 char *comm;
340 int maxlen;
341 {
342 char *s;
343
344 if ((s =
345 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL)
346 err(1, NULL);
347 return (s);
348 }
349
350 static void
saveuser(ki)351 saveuser(ki)
352 KINFO *ki;
353 {
354 struct pstats pstats;
355 struct usave *usp;
356
357 usp = &ki->ki_u;
358 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats,
359 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) {
360 /*
361 * The u-area might be swapped out, and we can't get
362 * at it because we have a crashdump and no swap.
363 * If it's here fill in these fields, otherwise, just
364 * leave them 0.
365 */
366 usp->u_start = pstats.p_start;
367 usp->u_ru = pstats.p_ru;
368 usp->u_cru = pstats.p_cru;
369 usp->u_valid = 1;
370 } else
371 usp->u_valid = 0;
372 /*
373 * save arguments if needed
374 */
375 if (needcomm)
376 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm,
377 MAXCOMLEN);
378 else
379 ki->ki_args = NULL;
380 if (needenv)
381 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0);
382 else
383 ki->ki_env = NULL;
384 }
385
386 static int
pscomp(a,b)387 pscomp(a, b)
388 const void *a, *b;
389 {
390 int i;
391 #ifdef NEWVM
392 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \
393 KI_EPROC(k)->e_vm.vm_tsize)
394 #else
395 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize)
396 #endif
397
398 if (sortby == SORTCPU)
399 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a));
400 if (sortby == SORTMEM)
401 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a));
402 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev;
403 if (i == 0)
404 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid;
405 return (i);
406 }
407
408 /*
409 * ICK (all for getopt), would rather hide the ugliness
410 * here than taint the main code.
411 *
412 * ps foo -> ps -foo
413 * ps 34 -> ps -p34
414 *
415 * The old convention that 't' with no trailing tty arg means the users
416 * tty, is only supported if argv[1] doesn't begin with a '-'. This same
417 * feature is available with the option 'T', which takes no argument.
418 */
419 static char *
kludge_oldps_options(s)420 kludge_oldps_options(s)
421 char *s;
422 {
423 size_t len;
424 char *newopts, *ns, *cp;
425
426 len = strlen(s);
427 if ((newopts = ns = malloc(len + 2)) == NULL)
428 err(1, NULL);
429 /*
430 * options begin with '-'
431 */
432 if (*s != '-')
433 *ns++ = '-'; /* add option flag */
434 /*
435 * gaze to end of argv[1]
436 */
437 cp = s + len - 1;
438 /*
439 * if last letter is a 't' flag with no argument (in the context
440 * of the oldps options -- option string NOT starting with a '-' --
441 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)).
442 */
443 if (*cp == 't' && *s != '-')
444 *cp = 'T';
445 else {
446 /*
447 * otherwise check for trailing number, which *may* be a
448 * pid.
449 */
450 while (cp >= s && isdigit(*cp))
451 --cp;
452 }
453 cp++;
454 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */
455 ns += cp - s;
456 /*
457 * if there's a trailing number, and not a preceding 'p' (pid) or
458 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag.
459 */
460 if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' &&
461 (cp - 1 == s || cp[-2] != 't')))
462 *ns++ = 'p';
463 (void)strcpy(ns, cp); /* and append the number */
464
465 return (newopts);
466 }
467
468 static void
usage()469 usage()
470 {
471
472 (void)fprintf(stderr,
473 "usage:\t%s\n\t %s\n\t%s\n",
474 "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]",
475 "[-M core] [-N system] [-W swap]",
476 "ps [-L]");
477 exit(1);
478 }
479