/* $NetBSD: ps.c,v 1.37 2000/04/29 00:18:48 abs Exp $ */ /*- * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1990, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94"; #else __RCSID("$NetBSD: ps.c,v 1.37 2000/04/29 00:18:48 abs Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ps.h" #ifdef P_PPWAIT #define NEWVM #endif KINFO *kinfo; struct varent *vhead, *vtail; int eval; /* exit value */ int rawcpu; /* -C */ int sumrusage; /* -S */ int dontuseprocfs=0; /* -K */ int termwidth; /* width of screen (0 == infinity) */ int totwidth; /* calculated width of requested variables */ int needuser, needcomm, needenv, commandonly, use_procfs; uid_t myuid; enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT; static KINFO *getkinfo_kvm __P((kvm_t *, int, int, int *, int)); static char *kludge_oldps_options __P((char *)); static int pscomp __P((const void *, const void *)); static void saveuser __P((KINFO *)); static void scanvars __P((void)); static void usage __P((void)); int main __P((int, char *[])); char dfmt[] = "pid tt state time command"; char jfmt[] = "user pid ppid pgid sess jobc state tt time command"; char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command"; char o1[] = "pid"; char o2[] = "tt state time command"; char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command"; char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command"; kvm_t *kd; int main(argc, argv) int argc; char *argv[]; { struct varent *vent; struct winsize ws; gid_t egid = getegid(); int ch, flag, i, fmt, lineno, nentries; int prtheader, wflag, what, xflg; char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX]; char *ttname; (void)setegid(getgid()); if (ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 || ws.ws_col == 0) termwidth = 79; else termwidth = ws.ws_col - 1; if (argc > 1) argv[1] = kludge_oldps_options(argv[1]); fmt = prtheader = wflag = xflg = 0; what = KERN_PROC_UID; flag = myuid = getuid(); memf = nlistf = swapf = NULL; while ((ch = getopt(argc, argv, "acCeghjKLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1) switch((char)ch) { case 'a': what = KERN_PROC_ALL; flag = 0; break; case 'c': commandonly = 1; break; case 'e': /* XXX set ufmt */ needenv = 1; break; case 'C': rawcpu = 1; break; case 'g': break; /* no-op */ case 'h': prtheader = ws.ws_row > 5 ? ws.ws_row : 22; break; case 'j': parsefmt(jfmt); fmt = 1; jfmt[0] = '\0'; break; case 'K': dontuseprocfs=1; break; case 'L': showkey(); exit(0); /* NOTREACHED */ case 'l': parsefmt(lfmt); fmt = 1; lfmt[0] = '\0'; break; case 'M': memf = optarg; dontuseprocfs = 1; break; case 'm': sortby = SORTMEM; break; case 'N': nlistf = optarg; break; case 'O': parsefmt(o1); parsefmt(optarg); parsefmt(o2); o1[0] = o2[0] = '\0'; fmt = 1; break; case 'o': parsefmt(optarg); fmt = 1; break; case 'p': what = KERN_PROC_PID; flag = atol(optarg); xflg = 1; break; case 'r': sortby = SORTCPU; break; case 'S': sumrusage = 1; break; case 'T': if ((ttname = ttyname(STDIN_FILENO)) == NULL) errx(1, "stdin: not a terminal"); goto tty; case 't': ttname = optarg; tty: { struct stat sb; char *ttypath, pathbuf[MAXPATHLEN]; flag = 0; if (strcmp(ttname, "?") == 0) flag = KERN_PROC_TTY_NODEV; else if (strcmp(ttname, "-") == 0) flag = KERN_PROC_TTY_REVOKE; else if (strcmp(ttname, "co") == 0) ttypath = _PATH_CONSOLE; else if (*ttname != '/') (void)snprintf(ttypath = pathbuf, sizeof(pathbuf), "%s%s", _PATH_TTY, ttname); else ttypath = ttname; what = KERN_PROC_TTY; if (flag == 0) { if (stat(ttypath, &sb) == -1) err(1, "%s", ttypath); if (!S_ISCHR(sb.st_mode)) errx(1, "%s: not a terminal", ttypath); flag = sb.st_rdev; } break; } case 'U': if (*optarg != '\0') { struct passwd *pw; char *ep; what = KERN_PROC_UID; pw = getpwnam(optarg); if (pw == NULL) { errno = 0; flag = strtoul(optarg, &ep, 10); if (errno) err(1, "%s", optarg); if (*ep != '\0') errx(1, "%s: illegal user name", optarg); } else flag = pw->pw_uid; } break; case 'u': parsefmt(ufmt); sortby = SORTCPU; fmt = 1; ufmt[0] = '\0'; break; case 'v': parsefmt(vfmt); sortby = SORTMEM; fmt = 1; vfmt[0] = '\0'; break; case 'W': swapf = optarg; break; case 'w': if (wflag) termwidth = UNLIMITED; else if (termwidth < 131) termwidth = 131; wflag++; break; case 'x': xflg = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; #define BACKWARD_COMPATIBILITY #ifdef BACKWARD_COMPATIBILITY if (*argv) { nlistf = *argv; if (*++argv) { memf = *argv; if (*++argv) swapf = *argv; } } #endif /* * Discard setgid privileges. If not the running kernel, we toss * them away totally so that bad guys can't print interesting stuff * from kernel memory, otherwise switch back to kmem for the * duration of the kvm_openfiles() call. */ if (nlistf != NULL || memf != NULL || swapf != NULL) (void)setgid(getgid()); else (void)setegid(egid); kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf); if (kd == 0) { if (dontuseprocfs) errx(1, "%s", errbuf); else { warnx("kvm_openfiles: %s", errbuf); fprintf(stderr, "ps: falling back to /proc-based lookup\n"); } } if (nlistf == NULL && memf == NULL && swapf == NULL) (void)setgid(getgid()); if (!fmt) parsefmt(dfmt); /* * scan requested variables, noting what structures are needed, * and adjusting header widths as appropiate. */ scanvars(); /* * select procs */ if (!kd || !(kinfo = getkinfo_kvm(kd, what, flag, &nentries, needuser))) { /* If/when the /proc-based code is ripped out * again, make sure all references to the -K * option are also pulled (getopt(), usage(), * man page). See the man page comments about * this for more details. */ /* sysctl() ought to provide some sort of * always-working-but-minimal-functionality * method of providing at least some of the * process information. Unfortunately, such a * change will require too much work to be put * into 1.4. For now, enable this experimental * /proc-based support instead (if /proc is * mounted) to grab as much information as we can. * The guts of emulating kvm_getprocs() is in * the file procfs_ops.c. */ if (kd) warnx("%s.", kvm_geterr(kd)); if (dontuseprocfs) { exit(1); } /* procfs_getprocs supports all but the * KERN_PROC_RUID flag. */ kinfo = getkinfo_procfs(what, flag, &nentries); if (kinfo == 0) { errx(1, "fallback /proc-based lookup also failed. %s", "Giving up..."); } fprintf(stderr, "%s%s", "Warning: /proc does not provide ", "valid data for all fields.\n"); use_procfs = 1; } /* * print header */ printheader(); if (nentries == 0) exit(0); /* * sort proc list */ qsort(kinfo, nentries, sizeof(KINFO), pscomp); /* * for each proc, call each variable output function. */ for (i = lineno = 0; i < nentries; i++) { KINFO *ki = &kinfo[i]; if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV || (KI_PROC(ki)->p_flag & P_CONTROLT ) == 0)) continue; for (vent = vhead; vent; vent = vent->next) { (vent->var->oproc)(ki, vent); if (vent->next != NULL) (void)putchar(' '); } (void)putchar('\n'); if (prtheader && lineno++ == prtheader - 4) { (void)putchar('\n'); printheader(); lineno = 0; } } exit(eval); /* NOTREACHED */ } static KINFO * getkinfo_kvm(kd, what, flag, nentriesp, needuser) kvm_t *kd; int what, flag, *nentriesp, needuser; { struct kinfo_proc *kp; KINFO *kinfo=NULL; size_t i; if ((kp = kvm_getprocs(kd, what, flag, nentriesp)) != 0) { if ((kinfo = malloc((*nentriesp) * sizeof(*kinfo))) == NULL) err(1, NULL); for (i = (*nentriesp); i-- > 0; kp++) { kinfo[i].ki_p = kp; if (needuser) saveuser(&kinfo[i]); } } return (kinfo); } static void scanvars() { struct varent *vent; VAR *v; int i; for (vent = vhead; vent; vent = vent->next) { v = vent->var; i = strlen(v->header); if (v->width < i) v->width = i; totwidth += v->width + 1; /* +1 for space */ if (v->flag & USER) needuser = 1; if (v->flag & COMM) needcomm = 1; } totwidth--; } static void saveuser(ki) KINFO *ki; { struct pstats pstats; struct usave *usp; usp = &ki->ki_u; if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats, (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) { /* * 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. */ usp->u_start = pstats.p_start; usp->u_ru = pstats.p_ru; usp->u_cru = pstats.p_cru; usp->u_valid = 1; } else usp->u_valid = 0; } static int pscomp(a, b) const void *a, *b; { int i; #ifdef NEWVM #define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \ KI_EPROC(k)->e_vm.vm_tsize) #else #define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize) #endif if (sortby == SORTCPU) return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a)); if (sortby == SORTMEM) return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a)); i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev; if (i == 0) i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid; return (i); } /* * 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 user's * 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(s) char *s; { size_t len; char *newopts, *ns, *cp; len = strlen(s); if ((newopts = ns = malloc(len + 3)) == NULL) err(1, NULL); /* * 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)). */ if (*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] != 'U' && cp[-1] != 't' && cp[-1] != 'p' && (cp - 1 == s || cp[-2] != 't')))) *ns++ = 'p'; /* and append the number */ (void)strcpy(ns, cp); /* XXX strcpy is safe */ return (newopts); } static void usage() { (void)fprintf(stderr, "usage:\t%s\n\t %s\n\t%s\n", "ps [-aChjKlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]", "[-M core] [-N system] [-W swap] [-U username]", "ps [-L]"); exit(1); /* NOTREACHED */ }