1 /*- 2 * Copyright (c) 1990, 1993 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\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 8.2 (Berkeley) 09/23/93"; 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 register struct kinfo_proc *kp; 82 register struct varent *vent; 83 int nentries; 84 register int i; 85 struct winsize ws; 86 dev_t ttydev; 87 int all, ch, flag, fmt, lineno, pid, prtheader, uid, wflag, what, xflg; 88 char *nlistf, *memf, *swapf, errbuf[256]; 89 90 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 91 ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 && 92 ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) || 93 ws.ws_col == 0) 94 termwidth = 79; 95 else 96 termwidth = ws.ws_col - 1; 97 98 if (argc > 1) 99 argv[1] = kludge_oldps_options(argv[1]); 100 101 all = fmt = prtheader = wflag = xflg = 0; 102 pid = uid = -1; 103 ttydev = NODEV; 104 memf = nlistf = swapf = NULL; 105 while ((ch = getopt(argc, argv, 106 "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF) 107 switch((char)ch) { 108 case 'a': 109 all = 1; 110 break; 111 case 'e': /* XXX set ufmt */ 112 needenv = 1; 113 break; 114 case 'C': 115 rawcpu = 1; 116 break; 117 case 'g': 118 break; /* no-op */ 119 case 'h': 120 prtheader = ws.ws_row > 5 ? ws.ws_row : 22; 121 break; 122 case 'j': 123 parsefmt(jfmt); 124 fmt = 1; 125 jfmt[0] = '\0'; 126 break; 127 case 'L': 128 showkey(); 129 exit(0); 130 case 'l': 131 parsefmt(lfmt); 132 fmt = 1; 133 lfmt[0] = '\0'; 134 break; 135 case 'M': 136 memf = optarg; 137 break; 138 case 'm': 139 sortby = SORTMEM; 140 break; 141 case 'N': 142 nlistf = optarg; 143 break; 144 case 'O': 145 parsefmt(o1); 146 parsefmt(optarg); 147 parsefmt(o2); 148 o1[0] = o2[0] = '\0'; 149 fmt = 1; 150 break; 151 case 'o': 152 parsefmt(optarg); 153 fmt = 1; 154 break; 155 case 'p': 156 pid = atoi(optarg); 157 xflg = 1; 158 break; 159 case 'r': 160 sortby = SORTCPU; 161 break; 162 case 'S': 163 sumrusage = 1; 164 break; 165 case 'T': 166 if ((optarg = ttyname(STDIN_FILENO)) == NULL) 167 errx(1, "stdin: not a terminal"); 168 /* FALLTHROUGH */ 169 case 't': { 170 struct stat sb; 171 char *ttypath, pathbuf[MAXPATHLEN]; 172 173 if (strcmp(optarg, "co") == 0) 174 ttypath = _PATH_CONSOLE; 175 else if (*optarg != '/') 176 (void)snprintf(ttypath = pathbuf, 177 sizeof(pathbuf), "%s%s", _PATH_TTY, optarg); 178 else 179 ttypath = optarg; 180 if (stat(ttypath, &sb) == -1) 181 err(1, "%s", ttypath); 182 if (!S_ISCHR(sb.st_mode)) 183 errx(1, "%s: not a terminal", ttypath); 184 ttydev = sb.st_rdev; 185 break; 186 } 187 case 'u': 188 parsefmt(ufmt); 189 sortby = SORTCPU; 190 fmt = 1; 191 ufmt[0] = '\0'; 192 break; 193 case 'v': 194 parsefmt(vfmt); 195 sortby = SORTMEM; 196 fmt = 1; 197 vfmt[0] = '\0'; 198 break; 199 case 'W': 200 swapf = optarg; 201 break; 202 case 'w': 203 if (wflag) 204 termwidth = UNLIMITED; 205 else if (termwidth < 131) 206 termwidth = 131; 207 wflag++; 208 break; 209 case 'x': 210 xflg = 1; 211 break; 212 case '?': 213 default: 214 usage(); 215 } 216 argc -= optind; 217 argv += optind; 218 219 #define BACKWARD_COMPATIBILITY 220 #ifdef BACKWARD_COMPATIBILITY 221 if (*argv) { 222 nlistf = *argv; 223 if (*++argv) { 224 memf = *argv; 225 if (*++argv) 226 swapf = *argv; 227 } 228 } 229 #endif 230 /* 231 * Discard setgid privileges if not the running kernel so that bad 232 * guys can't print interesting stuff from kernel memory. 233 */ 234 if (nlistf != NULL || memf != NULL || swapf != NULL) 235 setgid(getgid()); 236 237 kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); 238 if (kd == 0) 239 errx(1, "%s", errbuf); 240 241 if (!fmt) 242 parsefmt(dfmt); 243 244 if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */ 245 uid = getuid(); 246 247 /* 248 * scan requested variables, noting what structures are needed, 249 * and adjusting header widths as appropiate. 250 */ 251 scanvars(); 252 /* 253 * get proc list 254 */ 255 if (uid != -1) { 256 what = KERN_PROC_UID; 257 flag = uid; 258 } else if (ttydev != NODEV) { 259 what = KERN_PROC_TTY; 260 flag = ttydev; 261 } else if (pid != -1) { 262 what = KERN_PROC_PID; 263 flag = pid; 264 } else { 265 what = KERN_PROC_ALL; 266 flag = 0; 267 } 268 /* 269 * select procs 270 */ 271 if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0) 272 errx(1, "%s", kvm_geterr(kd)); 273 if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL) 274 err(1, NULL); 275 for (i = nentries; --i >= 0; ++kp) { 276 kinfo[i].ki_p = kp; 277 if (needuser) 278 saveuser(&kinfo[i]); 279 } 280 /* 281 * print header 282 */ 283 printheader(); 284 if (nentries == 0) 285 exit(0); 286 /* 287 * sort proc list 288 */ 289 qsort(kinfo, nentries, sizeof(KINFO), pscomp); 290 /* 291 * for each proc, call each variable output function. 292 */ 293 for (i = lineno = 0; i < nentries; i++) { 294 if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV || 295 (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0)) 296 continue; 297 for (vent = vhead; vent; vent = vent->next) { 298 (vent->var->oproc)(&kinfo[i], vent); 299 if (vent->next != NULL) 300 (void)putchar(' '); 301 } 302 (void)putchar('\n'); 303 if (prtheader && lineno++ == prtheader - 4) { 304 (void)putchar('\n'); 305 printheader(); 306 lineno = 0; 307 } 308 } 309 exit(eval); 310 } 311 312 static void 313 scanvars() 314 { 315 register struct varent *vent; 316 register VAR *v; 317 register int i; 318 319 for (vent = vhead; vent; vent = vent->next) { 320 v = vent->var; 321 i = strlen(v->header); 322 if (v->width < i) 323 v->width = i; 324 totwidth += v->width + 1; /* +1 for space */ 325 if (v->flag & USER) 326 needuser = 1; 327 if (v->flag & COMM) 328 needcomm = 1; 329 } 330 totwidth--; 331 } 332 333 static char * 334 fmt(fn, ki, comm, maxlen) 335 char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int)); 336 KINFO *ki; 337 char *comm; 338 int maxlen; 339 { 340 register char *s; 341 342 if ((s = 343 fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL) 344 err(1, NULL); 345 return (s); 346 } 347 348 static void 349 saveuser(ki) 350 KINFO *ki; 351 { 352 register struct usave *usp = &ki->ki_u; 353 struct pstats pstats; 354 extern char *fmt_argv(); 355 356 if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, 357 (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { 358 /* 359 * The u-area might be swapped out, and we can't get 360 * at it because we have a crashdump and no swap. 361 * If it's here fill in these fields, otherwise, just 362 * leave them 0. 363 */ 364 usp->u_start = pstats.p_start; 365 usp->u_ru = pstats.p_ru; 366 usp->u_cru = pstats.p_cru; 367 usp->u_valid = 1; 368 } else 369 usp->u_valid = 0; 370 /* 371 * save arguments if needed 372 */ 373 if (needcomm) 374 ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm, 375 MAXCOMLEN); 376 else 377 ki->ki_args = NULL; 378 if (needenv) 379 ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0); 380 else 381 ki->ki_env = NULL; 382 } 383 384 static int 385 pscomp(a, b) 386 const void *a, *b; 387 { 388 int i; 389 #ifdef NEWVM 390 #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ 391 KI_EPROC(k)->e_vm.vm_tsize) 392 #else 393 #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) 394 #endif 395 396 if (sortby == SORTCPU) 397 return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); 398 if (sortby == SORTMEM) 399 return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); 400 i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; 401 if (i == 0) 402 i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; 403 return (i); 404 } 405 406 /* 407 * ICK (all for getopt), would rather hide the ugliness 408 * here than taint the main code. 409 * 410 * ps foo -> ps -foo 411 * ps 34 -> ps -p34 412 * 413 * The old convention that 't' with no trailing tty arg means the users 414 * tty, is only supported if argv[1] doesn't begin with a '-'. This same 415 * feature is available with the option 'T', which takes no argument. 416 */ 417 static char * 418 kludge_oldps_options(s) 419 char *s; 420 { 421 size_t len; 422 char *newopts, *ns, *cp; 423 424 len = strlen(s); 425 if ((newopts = ns = malloc(len + 2)) == NULL) 426 err(1, NULL); 427 /* 428 * options begin with '-' 429 */ 430 if (*s != '-') 431 *ns++ = '-'; /* add option flag */ 432 /* 433 * gaze to end of argv[1] 434 */ 435 cp = s + len - 1; 436 /* 437 * if last letter is a 't' flag with no argument (in the context 438 * of the oldps options -- option string NOT starting with a '-' -- 439 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)). 440 */ 441 if (*cp == 't' && *s != '-') 442 *cp = 'T'; 443 else { 444 /* 445 * otherwise check for trailing number, which *may* be a 446 * pid. 447 */ 448 while (cp >= s && isdigit(*cp)) 449 --cp; 450 } 451 cp++; 452 memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */ 453 ns += cp - s; 454 /* 455 * if there's a trailing number, and not a preceding 'p' (pid) or 456 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag. 457 */ 458 if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' && 459 (cp - 1 == s || cp[-2] != 't'))) 460 *ns++ = 'p'; 461 (void)strcpy(ns, cp); /* and append the number */ 462 463 return (newopts); 464 } 465 466 static void 467 usage() 468 { 469 (void)fprintf(stderr, 470 "usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]\n\t [-M core] [-N system] [-W swap]\n ps [-L]\n"); 471 exit(1); 472 } 473