/* $NetBSD: w.c,v 1.45 2001/01/05 04:59:21 mjl Exp $ */ /*- * 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 6/30/94"; #else __RCSID("$NetBSD: w.c,v 1.45 2001/01/05 04:59:21 mjl Exp $"); #endif #endif /* not lint */ /* * w - print system status (who and what) * * This program is similar to the systat command on Tenex/Tops 10/20 * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "extern.h" #define max(a,b) (((a)>(b))?(a):(b)) 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 left to print process args */ 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 + 1]; /* * 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_proc2 *kp; /* `most interesting' proc */ #ifdef SUPPORT_FTPD_UTMP pid_t ftpd_pid; /* pid as extracted from ftpd's entry */ #endif } *ep, *ehead = NULL, **nextp = &ehead; static void pr_args(struct kinfo_proc2 *); static void pr_header(time_t *, int); static struct stat *ttystat(char *, size_t); static void usage(int); int main(int, char **); int main(int argc, char **argv) { extern char *__progname; struct kinfo_proc2 *kp; struct hostent *hp; struct stat *stp; FILE *ut; struct in_addr l; time_t touched; int ch, i, nentries, nusers, wcmd, lognamelen; char *memf, *nlistf, *p, *x; char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; /* 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)) != -1) 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, memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) errx(1, "%s", errbuf); (void)time(&now); if ((ut = fopen(_PATH_UTMP, "r")) == NULL && wcmd) err(1, "%s", _PATH_UTMP); if (*argv) sel_user = *argv; for (nusers = 0; ut && 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)); if (!(stp = ttystat(ep->utmp.ut_line, UT_LINESIZE))) { #ifdef SUPPORT_FTPD_UTMP /* * Hack to recognize and correctly parse * utmp entry made by ftpd. The "tty" used * by ftpd is not a real tty, just identifier in * form ftpPROCESS_ID. Pid parsed from the "tty name" * is used later to match corresponding process. */ if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) ep->ftpd_pid = strtol(ep->utmp.ut_line + 3, NULL, 10); #endif /* SUPPORT_FTPD_UTMP */ continue; } ep->tdev = stp->st_rdev; /* * 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_KERN; mib[1] = KERN_CONSDEV; size = sizeof(dev_t); (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); } touched = stp->st_atime; if (touched < ep->utmp.ut_time) { /* tty untouched since before login */ touched = ep->utmp.ut_time; } if ((ep->idle = now - touched) < 0) ep->idle = 0; } if (ut) (void)fclose(ut); else nusers = 1; if (header || wcmd == 0) { pr_header(&now, nusers); if (wcmd == 0) exit (0); } if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &nentries)) == NULL) errx(1, "%s", kvm_geterr(kd)); /* Include trailing space because TTY header starts one column early. */ lognamelen = sizeof("USER ") - 1 /* NUL */; for (i = 0; i < nentries; i++, kp++) { if (kp->p_stat == SIDL || kp->p_stat == SZOMB) continue; for (ep = ehead; ep != NULL; ep = ep->next) { if (ep->tdev == kp->p_tdev && kp->p__pgid == kp->p_tpgid) { /* * Proc is in foreground of this terminal */ if (proc_compare(ep->kp, kp)) { ep->kp = kp; lognamelen = max(lognamelen, strlen(kp->p_login)); } break; } #ifdef SUPPORT_FTPD_UTMP /* * Hack to match process to ftp utmp entry. */ else if (ep->tdev == 0 && kp->p_tdev == NODEV && ep->ftpd_pid == kp->p_pid) { ep->kp = kp; lognamelen = max(lognamelen, strlen(kp->p_login)); } #endif /* SUPPORT_FTPD_UTMP */ } } argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", lognamelen, "USER", UT_HOSTSIZE, "FROM", 7 /* "dddhhXm" */, "LOGIN@"); argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 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 - argwidth; if (argwidth < 4) argwidth = 8; /* 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) { int rv; rv = gethostname(domain, sizeof(domain)); domain[sizeof(domain) - 1] = '\0'; if (rv < 0 || (p = strchr(domain, '.')) == 0) domain[0] = '\0'; else memmove(domain, p, strlen(p) + 1); } for (ep = ehead; ep != NULL; ep = ep->next) { char host_buf[UT_HOSTSIZE + 1]; host_buf[UT_HOSTSIZE] = '\0'; strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); p = *host_buf ? host_buf : "-"; for (x = p; x < p + UT_HOSTSIZE; x++) if (*x == '\0' || *x == ':') break; if (x == p + UT_HOSTSIZE || *x != ':') x = NULL; else *x++ = '\0'; if (!nflag && inet_aton(p, &l) && (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 && strcasecmp(p, domain) == 0) *p = '\0'; } p = hp->h_name; } if (x) { (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); p = buf; } if (ep->kp == NULL) { warnx("Stale utmp entry: %.*s %.*s %.*s", UT_NAMESIZE, ep->utmp.ut_name, UT_LINESIZE, ep->utmp.ut_line, UT_HOSTSIZE, ep->utmp.ut_host); continue; } (void)printf("%-*s %-2.2s %-*.*s ", lognamelen, ep->kp->p_login, (strncmp(ep->utmp.ut_line, "tty", 3) && strncmp(ep->utmp.ut_line, "dty", 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); pr_args(ep->kp); (void)printf("\n"); } exit(0); } static void pr_args(struct kinfo_proc2 *kp) { char **argv; int left; if (kp == 0) goto nothing; left = argwidth; argv = kvm_getargv2(kd, kp, argwidth); if (argv == 0) goto nothing; while (*argv) { fmt_puts(*argv, &left); argv++; fmt_putc(' ', &left); } return; nothing: putchar('-'); } static void pr_header(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), "%l:%" "M%p", localtime(nowp)); buf[sizeof(buf) - 1] = '\0'; (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; if (uptime > SECSPERMIN) { 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(char *line, size_t sz) { static struct stat sb; char ttybuf[MAXPATHLEN]; (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, (int) sz, line); if (stat(ttybuf, &sb)) return (NULL); return (&sb); } static void usage(int wcmd) { if (wcmd) (void)fprintf(stderr, "usage: w: [-hin] [-M core] [-N system] [user]\n"); else (void)fprintf(stderr, "uptime\n"); exit(1); }