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 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 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 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 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 * 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 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