568 lines
14 KiB
C
568 lines
14 KiB
C
/* $NetBSD: ps.c,v 1.35 2000/04/10 06:37:37 chs Exp $ */
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/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1990, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: ps.c,v 1.35 2000/04/10 06:37:37 chs Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ps.h"
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#ifdef P_PPWAIT
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#define NEWVM
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#endif
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KINFO *kinfo;
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struct varent *vhead, *vtail;
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int eval; /* exit value */
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int rawcpu; /* -C */
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int sumrusage; /* -S */
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int dontuseprocfs=0; /* -K */
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int termwidth; /* width of screen (0 == infinity) */
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int totwidth; /* calculated width of requested variables */
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int needuser, needcomm, needenv, commandonly, use_procfs;
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uid_t myuid;
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enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
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static KINFO *getkinfo_kvm __P((kvm_t *, int, int, int *, int));
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static char *kludge_oldps_options __P((char *));
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static int pscomp __P((const void *, const void *));
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static void saveuser __P((KINFO *));
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static void scanvars __P((void));
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static void usage __P((void));
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int main __P((int, char *[]));
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char dfmt[] = "pid tt state time command";
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char jfmt[] = "user pid ppid pgid sess jobc state tt time command";
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char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command";
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char o1[] = "pid";
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char o2[] = "tt state time command";
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char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command";
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char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command";
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kvm_t *kd;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct varent *vent;
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struct winsize ws;
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gid_t egid = getegid();
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int ch, flag, i, fmt, lineno, nentries;
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int prtheader, wflag, what, xflg;
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char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX];
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char *ttname;
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(void)setegid(getgid());
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if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
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ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
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ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) ||
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ws.ws_col == 0)
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termwidth = 79;
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else
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termwidth = ws.ws_col - 1;
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if (argc > 1)
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argv[1] = kludge_oldps_options(argv[1]);
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fmt = prtheader = wflag = xflg = 0;
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what = KERN_PROC_UID;
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flag = myuid = getuid();
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memf = nlistf = swapf = NULL;
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while ((ch = getopt(argc, argv,
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"acCeghjKLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1)
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switch((char)ch) {
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case 'a':
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what = KERN_PROC_ALL;
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flag = 0;
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break;
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case 'c':
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commandonly = 1;
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break;
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case 'e': /* XXX set ufmt */
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needenv = 1;
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break;
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case 'C':
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rawcpu = 1;
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break;
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case 'g':
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break; /* no-op */
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case 'h':
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prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
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break;
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case 'j':
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parsefmt(jfmt);
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fmt = 1;
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jfmt[0] = '\0';
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break;
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case 'K':
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dontuseprocfs=1;
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break;
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case 'L':
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showkey();
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exit(0);
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/* NOTREACHED */
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case 'l':
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parsefmt(lfmt);
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fmt = 1;
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lfmt[0] = '\0';
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break;
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case 'M':
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memf = optarg;
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dontuseprocfs = 1;
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break;
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case 'm':
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sortby = SORTMEM;
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break;
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case 'N':
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nlistf = optarg;
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break;
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case 'O':
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parsefmt(o1);
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parsefmt(optarg);
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parsefmt(o2);
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o1[0] = o2[0] = '\0';
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fmt = 1;
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break;
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case 'o':
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parsefmt(optarg);
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fmt = 1;
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break;
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case 'p':
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what = KERN_PROC_PID;
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flag = atol(optarg);
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xflg = 1;
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break;
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case 'r':
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sortby = SORTCPU;
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break;
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case 'S':
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sumrusage = 1;
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break;
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case 'T':
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if ((ttname = ttyname(STDIN_FILENO)) == NULL)
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errx(1, "stdin: not a terminal");
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goto tty;
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case 't':
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ttname = optarg;
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tty: {
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struct stat sb;
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char *ttypath, pathbuf[MAXPATHLEN];
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if (strcmp(ttname, "co") == 0)
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ttypath = _PATH_CONSOLE;
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else if (*ttname != '/')
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(void)snprintf(ttypath = pathbuf,
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sizeof(pathbuf), "%s%s", _PATH_TTY, ttname);
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else
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ttypath = ttname;
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if (stat(ttypath, &sb) == -1)
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err(1, "%s", ttypath);
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if (!S_ISCHR(sb.st_mode))
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errx(1, "%s: not a terminal", ttypath);
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what = KERN_PROC_TTY;
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flag = sb.st_rdev;
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break;
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}
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case 'U':
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if (*optarg != '\0') {
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struct passwd *pw;
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char *ep;
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what = KERN_PROC_UID;
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pw = getpwnam(optarg);
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if (pw == NULL) {
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errno = 0;
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flag = strtoul(optarg, &ep, 10);
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if (errno)
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err(1, "%s", optarg);
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if (*ep != '\0')
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errx(1, "%s: illegal user name",
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optarg);
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} else
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flag = pw->pw_uid;
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}
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break;
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case 'u':
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parsefmt(ufmt);
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sortby = SORTCPU;
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fmt = 1;
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ufmt[0] = '\0';
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break;
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case 'v':
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parsefmt(vfmt);
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sortby = SORTMEM;
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fmt = 1;
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vfmt[0] = '\0';
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break;
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case 'W':
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swapf = optarg;
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break;
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case 'w':
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if (wflag)
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termwidth = UNLIMITED;
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else if (termwidth < 131)
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termwidth = 131;
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wflag++;
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break;
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case 'x':
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xflg = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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#define BACKWARD_COMPATIBILITY
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#ifdef BACKWARD_COMPATIBILITY
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if (*argv) {
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nlistf = *argv;
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if (*++argv) {
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memf = *argv;
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if (*++argv)
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swapf = *argv;
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}
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}
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#endif
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/*
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* Discard setgid privileges. If not the running kernel, we toss
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* them away totally so that bad guys can't print interesting stuff
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* from kernel memory, otherwise switch back to kmem for the
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* duration of the kvm_openfiles() call.
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*/
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if (nlistf != NULL || memf != NULL || swapf != NULL)
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(void)setgid(getgid());
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else
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(void)setegid(egid);
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kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
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if (kd == 0) {
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if (dontuseprocfs)
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errx(1, "%s", errbuf);
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else {
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warnx("kvm_openfiles: %s", errbuf);
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fprintf(stderr, "ps: falling back to /proc-based lookup\n");
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}
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}
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if (nlistf == NULL && memf == NULL && swapf == NULL)
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(void)setgid(getgid());
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if (!fmt)
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parsefmt(dfmt);
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/*
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* scan requested variables, noting what structures are needed,
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* and adjusting header widths as appropiate.
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*/
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scanvars();
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/*
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* select procs
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*/
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if (!kd || !(kinfo = getkinfo_kvm(kd, what, flag, &nentries, needuser)))
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{
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/* If/when the /proc-based code is ripped out
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* again, make sure all references to the -K
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* option are also pulled (getopt(), usage(),
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* man page). See the man page comments about
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* this for more details. */
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/* sysctl() ought to provide some sort of
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* always-working-but-minimal-functionality
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* method of providing at least some of the
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* process information. Unfortunately, such a
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* change will require too much work to be put
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* into 1.4. For now, enable this experimental
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* /proc-based support instead (if /proc is
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* mounted) to grab as much information as we can.
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* The guts of emulating kvm_getprocs() is in
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* the file procfs_ops.c. */
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if (kd)
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warnx("%s.", kvm_geterr(kd));
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if (dontuseprocfs) {
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exit(1);
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}
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/* procfs_getprocs supports all but the
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* KERN_PROC_RUID flag. */
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kinfo = getkinfo_procfs(what, flag, &nentries);
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if (kinfo == 0) {
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errx(1, "fallback /proc-based lookup also failed. %s",
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"Giving up...");
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}
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fprintf(stderr, "%s%s",
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"Warning: /proc does not provide ",
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"valid data for all fields.\n");
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use_procfs = 1;
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}
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/*
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* print header
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*/
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printheader();
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if (nentries == 0)
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exit(0);
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/*
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* sort proc list
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*/
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qsort(kinfo, nentries, sizeof(KINFO), pscomp);
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/*
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* for each proc, call each variable output function.
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*/
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for (i = lineno = 0; i < nentries; i++) {
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KINFO *ki = &kinfo[i];
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if (xflg == 0 && (KI_EPROC(ki)->e_tdev == NODEV ||
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(KI_PROC(ki)->p_flag & P_CONTROLT ) == 0))
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continue;
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for (vent = vhead; vent; vent = vent->next) {
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(vent->var->oproc)(ki, vent);
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if (vent->next != NULL)
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(void)putchar(' ');
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}
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(void)putchar('\n');
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if (prtheader && lineno++ == prtheader - 4) {
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(void)putchar('\n');
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printheader();
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lineno = 0;
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}
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}
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exit(eval);
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/* NOTREACHED */
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}
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static KINFO *
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getkinfo_kvm(kd, what, flag, nentriesp, needuser)
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kvm_t *kd;
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int what, flag, *nentriesp, needuser;
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{
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struct kinfo_proc *kp;
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KINFO *kinfo=NULL;
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size_t i;
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if ((kp = kvm_getprocs(kd, what, flag, nentriesp)) != 0)
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{
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if ((kinfo = malloc((*nentriesp) * sizeof(*kinfo))) == NULL)
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err(1, NULL);
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for (i = (*nentriesp); i-- > 0; kp++) {
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kinfo[i].ki_p = kp;
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if (needuser)
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saveuser(&kinfo[i]);
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}
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}
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return (kinfo);
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}
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static void
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scanvars()
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{
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struct varent *vent;
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VAR *v;
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int i;
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for (vent = vhead; vent; vent = vent->next) {
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v = vent->var;
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i = strlen(v->header);
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if (v->width < i)
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v->width = i;
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totwidth += v->width + 1; /* +1 for space */
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if (v->flag & USER)
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needuser = 1;
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if (v->flag & COMM)
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needcomm = 1;
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}
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totwidth--;
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}
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static void
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saveuser(ki)
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KINFO *ki;
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{
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struct pstats pstats;
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struct usave *usp;
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usp = &ki->ki_u;
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if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats,
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(char *)&pstats, sizeof(pstats)) == sizeof(pstats)) {
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/*
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* The u-area might be swapped out, and we can't get
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* at it because we have a crashdump and no swap.
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* If it's here fill in these fields, otherwise, just
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* leave them 0.
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*/
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usp->u_start = pstats.p_start;
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usp->u_ru = pstats.p_ru;
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usp->u_cru = pstats.p_cru;
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usp->u_valid = 1;
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} else
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usp->u_valid = 0;
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}
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static int
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pscomp(a, b)
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const void *a, *b;
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{
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int i;
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#ifdef NEWVM
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#define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \
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KI_EPROC(k)->e_vm.vm_tsize)
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#else
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#define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize)
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#endif
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if (sortby == SORTCPU)
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return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a));
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if (sortby == SORTMEM)
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return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a));
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i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev;
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if (i == 0)
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i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid;
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return (i);
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}
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/*
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* ICK (all for getopt), would rather hide the ugliness
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* here than taint the main code.
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*
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* ps foo -> ps -foo
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* ps 34 -> ps -p34
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*
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* The old convention that 't' with no trailing tty arg means the user's
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* tty, is only supported if argv[1] doesn't begin with a '-'. This same
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* feature is available with the option 'T', which takes no argument.
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*/
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static char *
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kludge_oldps_options(s)
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char *s;
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{
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size_t len;
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char *newopts, *ns, *cp;
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len = strlen(s);
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if ((newopts = ns = malloc(len + 3)) == NULL)
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err(1, NULL);
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/*
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* options begin with '-'
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*/
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if (*s != '-')
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*ns++ = '-'; /* add option flag */
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/*
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* gaze to end of argv[1]
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*/
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cp = s + len - 1;
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/*
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* if last letter is a 't' flag with no argument (in the context
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* of the oldps options -- option string NOT starting with a '-' --
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|
* 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 */
|
|
}
|