MFC after: 1 week
X-MFC-with: d90ff31ae5
Sponsored by: Klara, Inc.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D38192
592 lines
15 KiB
C
592 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1991, 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. 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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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
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#endif
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/*
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* w - print system status (who and what)
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*
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* This program is similar to the systat command on Tenex/Tops 10/20
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*
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <sys/sbuf.h>
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#include <sys/socket.h>
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#include <sys/tty.h>
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#include <sys/types.h>
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#include <machine/cpu.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <ctype.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 <langinfo.h>
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#include <libgen.h>
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#include <libutil.h>
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#include <limits.h>
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#include <locale.h>
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#include <netdb.h>
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#include <nlist.h>
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#include <paths.h>
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#include <resolv.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 <timeconv.h>
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#include <unistd.h>
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#include <utmpx.h>
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#include <vis.h>
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#include <libxo/xo.h>
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#include "extern.h"
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static struct utmpx *utmp;
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static struct winsize ws;
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static kvm_t *kd;
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static time_t now; /* the current time of day */
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static size_t ttywidth; /* width of tty */
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static size_t fromwidth = 0; /* max width of "from" field */
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static size_t argwidth; /* width of arguments */
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static int header = 1; /* true if -h flag: don't print heading */
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static int nflag; /* true if -n flag: don't convert addrs */
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static int dflag; /* true if -d flag: output debug info */
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static int sortidle; /* sort by idle time */
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int use_ampm; /* use AM/PM time */
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static int use_comma; /* use comma as floats separator */
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static char **sel_users; /* login array of particular users selected */
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/*
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* One of these per active utmp entry.
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*/
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static struct entry {
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struct entry *next;
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struct utmpx utmp;
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dev_t tdev; /* dev_t of terminal */
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time_t idle; /* idle time of terminal in seconds */
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struct kinfo_proc *kp; /* `most interesting' proc */
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char *args; /* arg list of interesting process */
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struct kinfo_proc *dkp; /* debug option proc list */
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char *from; /* "from": name or addr */
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char *save_from; /* original "from": name or addr */
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} *ep, *ehead = NULL, **nextp = &ehead;
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#define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata)
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#define W_DISPUSERSIZE 10
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#define W_DISPLINESIZE 8
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#define W_MAXHOSTSIZE 40
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static void pr_header(time_t *, int);
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static struct stat *ttystat(char *);
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static void usage(int);
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char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */
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int
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main(int argc, char *argv[])
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{
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struct kinfo_proc *kp;
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struct kinfo_proc *dkp;
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struct stat *stp;
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time_t touched;
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size_t width;
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int ch, i, nentries, nusers, wcmd, longidle, longattime;
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const char *memf, *nlistf, *p, *save_p;
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char *x_suffix;
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char errbuf[_POSIX2_LINE_MAX];
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char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN];
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char *dot;
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(void)setlocale(LC_ALL, "");
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use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
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use_comma = (*nl_langinfo(RADIXCHAR) != ',');
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argc = xo_parse_args(argc, argv);
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if (argc < 0)
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exit(1);
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/* Are we w(1) or uptime(1)? */
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if (strcmp(basename(argv[0]), "uptime") == 0) {
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wcmd = 0;
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p = "";
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} else {
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wcmd = 1;
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p = "dhiflM:N:nsuw";
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}
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memf = _PATH_DEVNULL;
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nlistf = NULL;
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while ((ch = getopt(argc, argv, p)) != -1)
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switch (ch) {
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case 'd':
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dflag = 1;
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break;
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case 'h':
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header = 0;
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break;
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case 'i':
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sortidle = 1;
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break;
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case 'M':
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header = 0;
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memf = optarg;
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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 'n':
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nflag += 1;
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break;
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case 'f': case 'l': case 's': case 'u': case 'w':
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xo_warnx("-%c no longer supported", ch);
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/* FALLTHROUGH */
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case '?':
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default:
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usage(wcmd);
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}
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argc -= optind;
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argv += optind;
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if (!(_res.options & RES_INIT))
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res_init();
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_res.retrans = 2; /* resolver timeout to 2 seconds per try */
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_res.retry = 1; /* only try once.. */
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if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
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xo_errx(1, "%s", errbuf);
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(void)time(&now);
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if (*argv)
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sel_users = argv;
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setutxent();
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for (nusers = 0; (utmp = getutxent()) != NULL;) {
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struct addrinfo hints, *res;
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struct sockaddr_storage ss;
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struct sockaddr *sa = (struct sockaddr *)&ss;
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struct sockaddr_in *lsin = (struct sockaddr_in *)&ss;
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struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss;
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int isaddr;
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if (utmp->ut_type != USER_PROCESS)
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continue;
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if (!(stp = ttystat(utmp->ut_line)))
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continue; /* corrupted record */
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++nusers;
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if (wcmd == 0)
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continue;
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if (sel_users) {
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int usermatch;
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char **user;
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usermatch = 0;
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for (user = sel_users; !usermatch && *user; user++)
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if (!strcmp(utmp->ut_user, *user))
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usermatch = 1;
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if (!usermatch)
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continue;
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}
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if ((ep = calloc(1, sizeof(struct entry))) == NULL)
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xo_errx(1, "calloc");
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*nextp = ep;
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nextp = &ep->next;
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memmove(&ep->utmp, utmp, sizeof *utmp);
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ep->tdev = stp->st_rdev;
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/*
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* If this is the console device, attempt to ascertain
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* the true console device dev_t.
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*/
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if (ep->tdev == 0) {
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size_t size;
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size = sizeof(dev_t);
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(void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0);
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}
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touched = stp->st_atime;
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if (touched < ep->utmp.ut_tv.tv_sec) {
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/* tty untouched since before login */
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touched = ep->utmp.ut_tv.tv_sec;
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}
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if ((ep->idle = now - touched) < 0)
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ep->idle = 0;
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save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
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if ((x_suffix = strrchr(p, ':')) != NULL) {
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if ((dot = strchr(x_suffix, '.')) != NULL &&
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strchr(dot+1, '.') == NULL)
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*x_suffix++ = '\0';
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else
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x_suffix = NULL;
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}
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isaddr = 0;
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memset(&ss, '\0', sizeof(ss));
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if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) {
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lsin6->sin6_len = sizeof(*lsin6);
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lsin6->sin6_family = AF_INET6;
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isaddr = 1;
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} else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) {
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lsin->sin_len = sizeof(*lsin);
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lsin->sin_family = AF_INET;
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isaddr = 1;
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}
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if (nflag == 0) {
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/* Attempt to change an IP address into a name */
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if (isaddr && realhostname_sa(fn, sizeof(fn), sa,
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sa->sa_len) == HOSTNAME_FOUND)
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p = fn;
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} else if (!isaddr && nflag > 1) {
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/*
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* If a host has only one A/AAAA RR, change a
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* name into an IP address
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*/
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if (getaddrinfo(p, NULL, &hints, &res) == 0) {
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if (res->ai_next == NULL &&
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getnameinfo(res->ai_addr, res->ai_addrlen,
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fn, sizeof(fn), NULL, 0,
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NI_NUMERICHOST) == 0)
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p = fn;
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freeaddrinfo(res);
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}
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}
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if (x_suffix) {
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(void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix);
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p = buf;
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}
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ep->from = strdup(p);
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if ((width = strlen(p)) > fromwidth)
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fromwidth = width;
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if (save_p != p)
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ep->save_from = strdup(save_p);
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}
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endutxent();
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#define HEADER_USER "USER"
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#define HEADER_TTY "TTY"
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#define HEADER_FROM "FROM"
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#define HEADER_LOGIN_IDLE "LOGIN@ IDLE "
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#define HEADER_WHAT "WHAT\n"
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#define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \
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sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */
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if (sizeof(HEADER_FROM) > fromwidth)
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fromwidth = sizeof(HEADER_FROM);
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fromwidth++;
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if (fromwidth > W_MAXHOSTSIZE)
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fromwidth = W_MAXHOSTSIZE;
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xo_open_container("uptime-information");
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if (header || wcmd == 0) {
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pr_header(&now, nusers);
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if (wcmd == 0) {
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xo_close_container("uptime-information");
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if (xo_finish() < 0)
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xo_err(1, "stdout");
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(void)kvm_close(kd);
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exit(0);
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}
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xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}",
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W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER,
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W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY,
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fromwidth, fromwidth, HEADER_FROM,
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HEADER_LOGIN_IDLE HEADER_WHAT);
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}
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if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
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xo_err(1, "%s", kvm_geterr(kd));
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for (i = 0; i < nentries; i++, kp++) {
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if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB ||
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kp->ki_tdev == NODEV)
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continue;
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for (ep = ehead; ep != NULL; ep = ep->next) {
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if (ep->tdev == kp->ki_tdev) {
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/*
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* proc is associated with this terminal
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*/
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if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) {
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/*
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* Proc is 'most interesting'
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*/
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if (proc_compare(ep->kp, kp))
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ep->kp = kp;
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}
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/*
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* Proc debug option info; add to debug
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* list using kinfo_proc ki_spare[0]
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* as next pointer; ptr to ptr avoids the
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* ptr = long assumption.
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*/
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dkp = ep->dkp;
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ep->dkp = kp;
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debugproc(kp) = dkp;
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}
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}
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}
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if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
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ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
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ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
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ttywidth = 79;
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else
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ttywidth = ws.ws_col - 1;
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argwidth = ttywidth - WUSED;
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if (argwidth < 4)
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argwidth = 8;
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/* Don't truncate if we're outputting json or XML. */
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if (xo_get_style(NULL) != XO_STYLE_TEXT)
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argwidth = ARG_MAX;
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for (ep = ehead; ep != NULL; ep = ep->next) {
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if (ep->kp == NULL) {
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ep->args = strdup("-");
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continue;
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}
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ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
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ep->kp->ki_comm, NULL, MAXCOMLEN);
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if (ep->args == NULL)
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xo_err(1, "fmt_argv");
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}
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/* sort by idle time */
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if (sortidle && ehead != NULL) {
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struct entry *from, *save;
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from = ehead;
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ehead = NULL;
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while (from != NULL) {
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for (nextp = &ehead;
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(*nextp) && from->idle >= (*nextp)->idle;
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nextp = &(*nextp)->next)
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continue;
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save = from;
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from = from->next;
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save->next = *nextp;
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*nextp = save;
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}
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}
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xo_open_container("user-table");
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xo_open_list("user-entry");
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for (ep = ehead; ep != NULL; ep = ep->next) {
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time_t t;
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xo_open_instance("user-entry");
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if (dflag) {
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xo_open_container("process-table");
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xo_open_list("process-entry");
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for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
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const char *ptr;
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ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
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dkp->ki_comm, NULL, MAXCOMLEN);
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if (ptr == NULL)
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ptr = "-";
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xo_open_instance("process-entry");
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xo_emit("\t\t{:process-id/%-9d/%d} "
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"{:command/%hs}\n", dkp->ki_pid, ptr);
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xo_close_instance("process-entry");
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}
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xo_close_list("process-entry");
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xo_close_container("process-table");
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}
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xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ",
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W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user,
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W_DISPLINESIZE, W_DISPLINESIZE,
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*ep->utmp.ut_line ?
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(strncmp(ep->utmp.ut_line, "tty", 3) &&
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strncmp(ep->utmp.ut_line, "cua", 3) ?
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ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-");
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if (ep->save_from)
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xo_attr("address", "%s", ep->save_from);
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xo_emit("{:from/%-*.*s/%@**@s} ",
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(int)fromwidth, (int)fromwidth, ep->from);
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t = ep->utmp.ut_tv.tv_sec;
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longattime = pr_attime(&t, &now);
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longidle = pr_idle(ep->idle);
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xo_emit("{:command/%.*hs/%@*@hs}\n",
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(int)argwidth - longidle - longattime,
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ep->args);
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xo_close_instance("user-entry");
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}
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xo_close_list("user-entry");
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xo_close_container("user-table");
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xo_close_container("uptime-information");
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if (xo_finish() < 0)
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xo_err(1, "stdout");
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(void)kvm_close(kd);
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exit(0);
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}
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static void
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pr_header(time_t *nowp, int nusers)
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|
{
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|
char buf[64];
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struct sbuf upbuf;
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|
double avenrun[3];
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|
struct timespec tp;
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|
unsigned long days, hrs, mins, secs;
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|
unsigned int i;
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|
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|
/*
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|
* Print time of day.
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|
*/
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|
if (strftime(buf, sizeof(buf),
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use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0)
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xo_emit("{:time-of-day/%s} ", buf);
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|
/*
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|
* Print how long system has been up.
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|
*/
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|
(void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN);
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|
if (clock_gettime(CLOCK_UPTIME, &tp) != -1) {
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|
xo_emit(" up");
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|
secs = tp.tv_sec;
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|
xo_emit("{e:uptime/%lu}", secs);
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|
mins = secs / 60;
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|
secs %= 60;
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|
hrs = mins / 60;
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|
mins %= 60;
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|
days = hrs / 24;
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|
hrs %= 24;
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|
xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}",
|
|
days, hrs, mins, secs);
|
|
|
|
/* If we've been up longer than 60 s, round to nearest min */
|
|
if (tp.tv_sec > 60) {
|
|
secs = tp.tv_sec + 30;
|
|
mins = secs / 60;
|
|
secs = 0;
|
|
hrs = mins / 60;
|
|
mins %= 60;
|
|
days = hrs / 24;
|
|
hrs %= 24;
|
|
}
|
|
|
|
if (days > 0)
|
|
sbuf_printf(&upbuf, " %ld day%s,",
|
|
days, days > 1 ? "s" : "");
|
|
if (hrs > 0 && mins > 0)
|
|
sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins);
|
|
else if (hrs > 0)
|
|
sbuf_printf(&upbuf, " %ld hr%s,",
|
|
hrs, hrs > 1 ? "s" : "");
|
|
else if (mins > 0)
|
|
sbuf_printf(&upbuf, " %ld min%s,",
|
|
mins, mins > 1 ? "s" : "");
|
|
else
|
|
sbuf_printf(&upbuf, " %ld sec%s,",
|
|
secs, secs > 1 ? "s" : "");
|
|
if (sbuf_finish(&upbuf) != 0)
|
|
xo_err(1, "Could not generate output");
|
|
xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf));
|
|
sbuf_delete(&upbuf);
|
|
}
|
|
|
|
/* Print number of users logged in to system */
|
|
xo_emit(" {:users/%d} {Np:user,users}", nusers);
|
|
|
|
/*
|
|
* Print 1, 5, and 15 minute load averages.
|
|
*/
|
|
if (getloadavg(avenrun, nitems(avenrun)) == -1)
|
|
xo_emit(", no load average information available\n");
|
|
else {
|
|
static const char *format[] = {
|
|
" {:load-average-1/%.2f}",
|
|
" {:load-average-5/%.2f}",
|
|
" {:load-average-15/%.2f}",
|
|
};
|
|
xo_emit(", load averages:");
|
|
for (i = 0; i < nitems(avenrun); i++) {
|
|
if (use_comma && i > 0)
|
|
xo_emit(",");
|
|
xo_emit(format[i], avenrun[i]);
|
|
}
|
|
xo_emit("\n");
|
|
}
|
|
}
|
|
|
|
static struct stat *
|
|
ttystat(char *line)
|
|
{
|
|
static struct stat sb;
|
|
char ttybuf[MAXPATHLEN];
|
|
|
|
(void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line);
|
|
if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode))
|
|
return (&sb);
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
usage(int wcmd)
|
|
{
|
|
if (wcmd)
|
|
xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n");
|
|
else
|
|
xo_error("usage: uptime\n");
|
|
xo_finish();
|
|
exit(1);
|
|
}
|