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-rw-r--r--usr.bin/w/w.c426
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diff --git a/usr.bin/w/w.c b/usr.bin/w/w.c
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+/*-
+ * Copyright (c) 1980, 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
+#endif /* not lint */
+
+/*
+ * w - print system status (who and what)
+ *
+ * This program is similar to the systat command on Tenex/Tops 10/20
+ *
+ */
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/sysctl.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/tty.h>
+
+#include <machine/cpu.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <netdb.h>
+#include <nlist.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tzfile.h>
+#include <unistd.h>
+#include <utmp.h>
+#include <vis.h>
+
+#include "extern.h"
+
+struct timeval boottime;
+struct utmp utmp;
+struct winsize ws;
+kvm_t *kd;
+time_t now; /* the current time of day */
+time_t uptime; /* time of last reboot & elapsed time since */
+int ttywidth; /* width of tty */
+int argwidth; /* width of tty */
+int header = 1; /* true if -h flag: don't print heading */
+int nflag; /* true if -n flag: don't convert addrs */
+int sortidle; /* sort bu idle time */
+char *sel_user; /* login of particular user selected */
+char domain[MAXHOSTNAMELEN];
+
+/*
+ * One of these per active utmp entry.
+ */
+struct entry {
+ struct entry *next;
+ struct utmp utmp;
+ dev_t tdev; /* dev_t of terminal */
+ time_t idle; /* idle time of terminal in seconds */
+ struct kinfo_proc *kp; /* `most interesting' proc */
+ char *args; /* arg list of interesting process */
+} *ep, *ehead = NULL, **nextp = &ehead;
+
+static void pr_header __P((time_t *, int));
+static struct stat
+ *ttystat __P((char *));
+static void usage __P((int));
+
+char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */
+
+int
+main(argc, argv)
+ int argc;
+ char **argv;
+{
+ extern char *__progname;
+ struct kinfo_proc *kp;
+ struct hostent *hp;
+ struct stat *stp;
+ FILE *ut;
+ u_long l;
+ size_t arglen;
+ int ch, i, nentries, nusers, wcmd;
+ char *memf, *nlistf, *p, *vis_args, *x;
+ char buf[MAXHOSTNAMELEN], errbuf[256];
+
+ /* Are we w(1) or uptime(1)? */
+ p = __progname;
+ if (*p == '-')
+ p++;
+ if (*p == 'u') {
+ wcmd = 0;
+ p = "";
+ } else {
+ wcmd = 1;
+ p = "hiflM:N:nsuw";
+ }
+
+ memf = nlistf = NULL;
+ while ((ch = getopt(argc, argv, p)) != EOF)
+ switch (ch) {
+ case 'h':
+ header = 0;
+ break;
+ case 'i':
+ sortidle = 1;
+ break;
+ case 'M':
+ header = 0;
+ memf = optarg;
+ break;
+ case 'N':
+ nlistf = optarg;
+ break;
+ case 'n':
+ nflag = 1;
+ break;
+ case 'f': case 'l': case 's': case 'u': case 'w':
+ warnx("[-flsuw] no longer supported");
+ /* FALLTHROUGH */
+ case '?':
+ default:
+ usage(wcmd);
+ }
+ argc -= optind;
+ argv += optind;
+
+ if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
+ errx(1, "%s", errbuf);
+
+ (void)time(&now);
+ if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
+ err(1, "%s", _PATH_UTMP);
+
+ if (*argv)
+ sel_user = *argv;
+
+ for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
+ if (utmp.ut_name[0] == '\0')
+ continue;
+ ++nusers;
+ if (wcmd == 0 || (sel_user &&
+ strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
+ continue;
+ if ((ep = calloc(1, sizeof(struct entry))) == NULL)
+ err(1, NULL);
+ *nextp = ep;
+ nextp = &(ep->next);
+ memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
+ stp = ttystat(ep->utmp.ut_line);
+ ep->tdev = stp->st_rdev;
+#ifdef CPU_CONSDEV
+ /*
+ * If this is the console device, attempt to ascertain
+ * the true console device dev_t.
+ */
+ if (ep->tdev == 0) {
+ int mib[2];
+ size_t size;
+
+ mib[0] = CTL_MACHDEP;
+ mib[1] = CPU_CONSDEV;
+ size = sizeof(dev_t);
+ (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
+ }
+#endif
+ if ((ep->idle = now - stp->st_atime) < 0)
+ ep->idle = 0;
+ }
+ (void)fclose(ut);
+
+ if (header || wcmd == 0) {
+ pr_header(&now, nusers);
+ if (wcmd == 0)
+ exit (0);
+ }
+
+#define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
+#define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
+ (void)printf(HEADER);
+
+ if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
+ err(1, "%s", kvm_geterr(kd));
+ for (i = 0; i < nentries; i++, kp++) {
+ struct proc *p = &kp->kp_proc;
+ struct eproc *e;
+
+ if (p->p_stat == SIDL || p->p_stat == SZOMB)
+ continue;
+ e = &kp->kp_eproc;
+ for (ep = ehead; ep != NULL; ep = ep->next) {
+ if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
+ /*
+ * Proc is in foreground of this terminal
+ */
+ if (proc_compare(&ep->kp->kp_proc, p))
+ ep->kp = kp;
+ break;
+ }
+ }
+ }
+ if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
+ ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
+ ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
+ ttywidth = 79;
+ else
+ ttywidth = ws.ws_col - 1;
+ argwidth = ttywidth - WUSED;
+ if (argwidth < 4)
+ argwidth = 8;
+ for (ep = ehead; ep != NULL; ep = ep->next) {
+ if (ep->kp == NULL) {
+ ep->args = "-";
+ continue;
+ }
+ ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
+ ep->kp->kp_proc.p_comm, MAXCOMLEN);
+ if (ep->args == NULL)
+ err(1, NULL);
+ }
+ /* sort by idle time */
+ if (sortidle && ehead != NULL) {
+ struct entry *from = ehead, *save;
+
+ ehead = NULL;
+ while (from != NULL) {
+ for (nextp = &ehead;
+ (*nextp) && from->idle >= (*nextp)->idle;
+ nextp = &(*nextp)->next)
+ continue;
+ save = from;
+ from = from->next;
+ save->next = *nextp;
+ *nextp = save;
+ }
+ }
+
+ if (!nflag)
+ if (gethostname(domain, sizeof(domain) - 1) < 0 ||
+ (p = strchr(domain, '.')) == 0)
+ domain[0] = '\0';
+ else {
+ domain[sizeof(domain) - 1] = '\0';
+ memmove(domain, p, strlen(p) + 1);
+ }
+
+ if ((vis_args = malloc(argwidth * 4 + 1)) == NULL)
+ err(1, NULL);
+ for (ep = ehead; ep != NULL; ep = ep->next) {
+ p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
+ if ((x = strchr(p, ':')) != NULL)
+ *x++ = '\0';
+ if (!nflag && isdigit(*p) &&
+ (long)(l = inet_addr(p)) != -1 &&
+ (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
+ if (domain[0] != '\0') {
+ p = hp->h_name;
+ p += strlen(hp->h_name);
+ p -= strlen(domain);
+ if (p > hp->h_name && strcmp(p, domain) == 0)
+ *p = '\0';
+ }
+ p = hp->h_name;
+ }
+ if (x) {
+ (void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
+ p = buf;
+ }
+ (void)printf("%-*.*s %-2.2s %-*.*s ",
+ UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
+ strncmp(ep->utmp.ut_line, "tty", 3) ?
+ ep->utmp.ut_line : ep->utmp.ut_line + 3,
+ UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
+ pr_attime(&ep->utmp.ut_time, &now);
+ pr_idle(ep->idle);
+ if (ep->args != NULL) {
+ arglen = strlen(ep->args);
+ strvisx(vis_args, ep->args,
+ arglen > argwidth ? argwidth : arglen,
+ VIS_TAB | VIS_NL | VIS_NOSLASH);
+ }
+ (void)printf("%.*s\n", argwidth, ep->args);
+ }
+ exit(0);
+}
+
+static void
+pr_header(nowp, nusers)
+ time_t *nowp;
+ int nusers;
+{
+ double avenrun[3];
+ time_t uptime;
+ int days, hrs, i, mins;
+ int mib[2];
+ size_t size;
+ char buf[256];
+
+ /*
+ * Print time of day.
+ *
+ * SCCS forces the string manipulation below, as it replaces
+ * %, M, and % in a character string with the file name.
+ */
+ (void)strftime(buf, sizeof(buf),
+ __CONCAT("%l:%","M%p"), localtime(nowp));
+ (void)printf("%s ", buf);
+
+ /*
+ * Print how long system has been up.
+ * (Found by looking getting "boottime" from the kernel)
+ */
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_BOOTTIME;
+ size = sizeof(boottime);
+ if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
+ boottime.tv_sec != 0) {
+ uptime = now - boottime.tv_sec;
+ uptime += 30;
+ days = uptime / SECSPERDAY;
+ uptime %= SECSPERDAY;
+ hrs = uptime / SECSPERHOUR;
+ uptime %= SECSPERHOUR;
+ mins = uptime / SECSPERMIN;
+ (void)printf(" up");
+ if (days > 0)
+ (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
+ if (hrs > 0 && mins > 0)
+ (void)printf(" %2d:%02d,", hrs, mins);
+ else {
+ if (hrs > 0)
+ (void)printf(" %d hr%s,",
+ hrs, hrs > 1 ? "s" : "");
+ if (mins > 0)
+ (void)printf(" %d min%s,",
+ mins, mins > 1 ? "s" : "");
+ }
+ }
+
+ /* Print number of users logged in to system */
+ (void)printf(" %d user%s", nusers, nusers > 1 ? "s" : "");
+
+ /*
+ * Print 1, 5, and 15 minute load averages.
+ */
+ if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
+ (void)printf(", no load average information available\n");
+ else {
+ (void)printf(", load averages:");
+ for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
+ if (i > 0)
+ (void)printf(",");
+ (void)printf(" %.2f", avenrun[i]);
+ }
+ (void)printf("\n");
+ }
+}
+
+static struct stat *
+ttystat(line)
+ char *line;
+{
+ static struct stat sb;
+ char ttybuf[MAXPATHLEN];
+
+ (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
+ if (stat(ttybuf, &sb))
+ err(1, "%s", ttybuf);
+ return (&sb);
+}
+
+static void
+usage(wcmd)
+ int wcmd;
+{
+ if (wcmd)
+ (void)fprintf(stderr,
+ "usage: w: [-hin] [-M core] [-N system] [user]\n");
+ else
+ (void)fprintf(stderr, "uptime\n");
+ exit (1);
+}
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