524 lines
12 KiB
C
524 lines
12 KiB
C
/*-
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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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* $Id: ps.c,v 1.11 1996/01/12 08:49:43 peter Exp $
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) 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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static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94";
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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 <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 <locale.h>
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#include <pwd.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 termwidth; /* width of screen (0 == infinity) */
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int totwidth; /* calculated width of requested variables */
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static int needuser, needcomm, needenv;
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enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
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static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int),
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KINFO *, char *, 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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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 kinfo_proc *kp;
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struct varent *vent;
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struct winsize ws;
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struct passwd *pwd;
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dev_t ttydev;
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pid_t pid;
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uid_t uid;
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int all, 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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(void) setlocale(LC_ALL, "");
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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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all = fmt = prtheader = wflag = xflg = 0;
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pid = -1;
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uid = (uid_t) -1;
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ttydev = NODEV;
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memf = nlistf = swapf = NULL;
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while ((ch = getopt(argc, argv,
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"aCeghjLlM:mN:O:o:p:rSTt:U:uvW:wx")) != EOF)
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switch((char)ch) {
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case 'a':
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all = 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 'L':
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showkey();
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exit(0);
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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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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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pid = 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 ((optarg = ttyname(STDIN_FILENO)) == NULL)
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errx(1, "stdin: not a terminal");
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/* FALLTHROUGH */
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case 't': {
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struct stat sb;
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char *ttypath, pathbuf[MAXPATHLEN];
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if (strcmp(optarg, "co") == 0)
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ttypath = _PATH_CONSOLE;
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else if (*optarg != '/')
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(void)snprintf(ttypath = pathbuf,
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sizeof(pathbuf), "%s%s", _PATH_TTY, optarg);
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else
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ttypath = optarg;
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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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ttydev = sb.st_rdev;
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break;
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}
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case 'U':
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pwd = getpwnam(optarg);
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if (pwd == NULL)
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errx(1, "%s: no such user", optarg);
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uid = pwd->pw_uid;
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endpwent();
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xflg++; /* XXX: intuitive? */
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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 so that bad
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* guys can't print interesting stuff from kernel memory.
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*/
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if (nlistf != NULL || memf != NULL || swapf != NULL)
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setgid(getgid());
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kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
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if (kd == 0)
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errx(1, "%s", errbuf);
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if (!fmt)
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parsefmt(dfmt);
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/* XXX - should be cleaner */
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if (!all && ttydev == NODEV && pid == -1 && uid == (uid_t)-1)
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uid = getuid();
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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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* get proc list
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*/
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if (uid != (uid_t) -1) {
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what = KERN_PROC_UID;
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flag = uid;
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} else if (ttydev != NODEV) {
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what = KERN_PROC_TTY;
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flag = ttydev;
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} else if (pid != -1) {
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what = KERN_PROC_PID;
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flag = pid;
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} else {
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what = KERN_PROC_ALL;
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flag = 0;
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}
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/*
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* select procs
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*/
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if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0)
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errx(1, "%s", kvm_geterr(kd));
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if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
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err(1, NULL);
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for (i = nentries; --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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* 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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if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV ||
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(KI_PROC(&kinfo[i])->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)(&kinfo[i], 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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}
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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 char *
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fmt(fn, ki, comm, maxlen)
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char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int));
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KINFO *ki;
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char *comm;
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int maxlen;
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{
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char *s;
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if ((s =
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fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL)
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err(1, NULL);
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return (s);
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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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struct user *u_addr = (struct user *)USRSTACK;
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usp = &ki->ki_u;
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if (kvm_uread(kd, KI_PROC(ki), (unsigned long)&u_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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* save arguments if needed
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*/
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if (needcomm)
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ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm,
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MAXCOMLEN);
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else
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ki->ki_args = NULL;
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if (needenv)
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ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0);
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else
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ki->ki_env = NULL;
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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 users
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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 + 2)) == 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)).
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*/
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if (*cp == 't' && *s != '-')
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*cp = 'T';
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else {
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/*
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* otherwise check for trailing number, which *may* be a
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* pid.
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*/
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while (cp >= s && isdigit(*cp))
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--cp;
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}
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cp++;
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memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */
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ns += cp - s;
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/*
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* if there's a trailing number, and not a preceding 'p' (pid) or
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* 't' (tty) flag, then assume it's a pid and insert a 'p' flag.
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*/
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if (isdigit(*cp) &&
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(cp == s || (cp[-1] != 't' && cp[-1] != 'p')) &&
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(cp - 1 == s || cp[-2] != 't'))
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*ns++ = 'p';
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(void)strcpy(ns, cp); /* and append the number */
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return (newopts);
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage:\t%s\n\t %s\n\t%s\n",
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"ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]",
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"[-M core] [-N system] [-W swap]",
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"ps [-L]");
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exit(1);
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}
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