/* $NetBSD: w.c,v 1.93 2022/05/26 06:48:36 wiz 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. 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\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 6/30/94"; #else __RCSID("$NetBSD: w.c,v 1.93 2022/05/26 06:48:36 wiz 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 #ifdef SUPPORT_UTMP #include #endif #ifdef SUPPORT_UTMPX #include #endif #include #include "extern.h" struct timespec boottime; struct winsize ws; kvm_t *kd; time_t now; /* the current time of day */ 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 wflag; /* true if -w flag: wide printout */ int sortidle; /* sort by idle time */ int alphasort; /* sort by tty alphabeta, not numeric */ char *sel_user; /* login of particular user selected */ char domain[MAXHOSTNAMELEN + 1]; int maxname = 8, maxline = 3, maxhost = 16; /* * One of these per active utmp entry. */ struct entry { struct entry *next; char name[UTX_USERSIZE + 1]; char line[UTX_LINESIZE + 1]; char host[UTX_HOSTSIZE + 1]; char type[2]; struct timeval tv; dev_t tdev; /* dev_t of terminal */ time_t idle; /* idle time of terminal in seconds */ struct kinfo_proc2 *tp; /* `most interesting' tty proc */ struct kinfo_proc2 *pp; /* pid proc */ pid_t pid; /* pid or ~0 if not known */ } *ehead = NULL, **nextp = &ehead; static void pr_args(struct kinfo_proc2 *); static void pr_header(time_t *, int); static int proc_compare_wrapper(const struct kinfo_proc2 *, const struct kinfo_proc2 *); #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) static int ttystat(const char *, struct stat *); static void process(struct entry *); #endif static void fixhost(struct entry *ep); __dead static void usage(int); int main(int argc, char **argv) { struct kinfo_proc2 *kp; struct entry *ep; int ch, i, nentries, nusers, wcmd, curtain, use_sysctl; char *memf, *nlistf, *usrnp; const char *options; time_t then; size_t len; #ifdef SUPPORT_UTMP struct utmp *ut; #endif #ifdef SUPPORT_UTMPX struct utmpx *utx; #endif const char *progname; char errbuf[_POSIX2_LINE_MAX]; setprogname(argv[0]); /* Are we w(1) or uptime(1)? */ progname = getprogname(); if (*progname == '-') progname++; if (*progname == 'u') { wcmd = 0; options = ""; } else { wcmd = 1; options = "AhiM:N:nw"; } memf = nlistf = NULL; while ((ch = getopt(argc, argv, options)) != -1) switch (ch) { case 'A': alphasort = 1; break; 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 'w': wflag = 1; break; case '?': default: usage(wcmd); } argc -= optind; argv += optind; use_sysctl = (memf == NULL && nlistf == NULL); if ((kd = kvm_openfiles(nlistf, memf, NULL, memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) errx(1, "%s", errbuf); (void)time(&now); if (use_sysctl) { len = sizeof(curtain); if (sysctlbyname("security.curtain", &curtain, &len, NULL, 0) == -1) curtain = 0; } if (!nflag) { int rv; char *p; 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); } #ifdef SUPPORT_UTMPX setutxent(); #endif #ifdef SUPPORT_UTMP setutent(); #endif if (*argv) sel_user = *argv; nusers = 0; #ifdef SUPPORT_UTMPX while ((utx = getutxent()) != NULL) { if (utx->ut_type != USER_PROCESS) continue; ++nusers; #ifndef SUPPORT_UTMP if (wcmd == 0) continue; #endif /* !SUPPORT_UTMP */ if (sel_user && strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) continue; if ((ep = calloc(1, sizeof(struct entry))) == NULL) err(1, NULL); (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); ep->line[sizeof(utx->ut_line)] = '\0'; *nextp = ep; nextp = &(ep->next); if (wcmd == 0) continue; (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); ep->name[sizeof(utx->ut_name)] = '\0'; if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, NI_NUMERICHOST) != 0) { (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); ep->host[sizeof(utx->ut_host)] = '\0'; } fixhost(ep); ep->type[0] = 'x'; ep->tv = utx->ut_tv; ep->pid = utx->ut_pid; process(ep); } #endif #ifdef SUPPORT_UTMP while ((ut = getutent()) != NULL) { if (ut->ut_name[0] == '\0') continue; if (sel_user && strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name)) != 0) continue; /* Don't process entries that we have utmpx for */ for (ep = ehead; ep != NULL; ep = ep->next) { if (strncmp(ep->line, ut->ut_line, sizeof(ut->ut_line)) == 0) break; } if (ep != NULL) continue; ++nusers; if (wcmd == 0) continue; if ((ep = calloc(1, sizeof(struct entry))) == NULL) err(1, NULL); (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); ep->name[sizeof(ut->ut_name)] = '\0'; ep->line[sizeof(ut->ut_line)] = '\0'; ep->host[sizeof(ut->ut_host)] = '\0'; fixhost(ep); ep->tv.tv_sec = ut->ut_time; *nextp = ep; nextp = &(ep->next); process(ep); } #endif #ifdef SUPPORT_UTMPX endutxent(); #endif #ifdef SUPPORT_UTMP endutent(); #endif 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. */ for (i = 0; i < nentries; i++, kp++) { for (ep = ehead; ep != NULL; ep = ep->next) { if (ep->tdev != 0 && ep->tdev == kp->p_tdev && kp->p__pgid == kp->p_tpgid) { /* * Proc is in foreground of this * terminal */ if (proc_compare_wrapper(ep->tp, kp)) ep->tp = kp; break; } if (ep->pid != 0 && ep->pid == kp->p_pid) { ep->pp = 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; if (!wflag && maxhost > (ttywidth / 3)) maxhost = ttywidth / 3; argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", maxname, "USER", maxhost, "FROM", 7 /* "dddhhXm" */, "LOGIN@"); argwidth -= sizeof("WHAT\n") - 1 /* NUL */; argwidth = ttywidth - argwidth; if (argwidth < 4) argwidth = 8; if (wflag) argwidth = -1; /* 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 defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) else if (ehead != NULL && alphasort) { struct entry *from = ehead, *save; ehead = NULL; while (from != NULL) { for (nextp = &ehead; (*nextp) && strcmp(from->line, (*nextp)->line) > 0; nextp = &(*nextp)->next) continue; save = from; from = from->next; save->next = *nextp; *nextp = save; } } #endif for (ep = ehead; ep != NULL; ep = ep->next) { if (ep->tp != NULL) kp = ep->tp; else if (ep->pp != NULL) kp = ep->pp; else if (ep->pid != 0) { if (curtain) kp = NULL; else { warnx("Stale utmp%s entry: %s %s %s", ep->type, ep->name, ep->line, ep->host); continue; } } usrnp = (kp == NULL) ? ep->name : kp->p_login; (void)printf("%-*s %-7.7s %-*.*s ", maxname, usrnp, ep->line, maxhost, maxhost, ep->host); then = (time_t)ep->tv.tv_sec; pr_attime(&then, &now); pr_idle(ep->idle); pr_args(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 < 0) ? 0 : argwidth); if (argv == 0) { fmt_putc('(', &left); fmt_puts((char *)kp->p_comm, &left); fmt_putc(')', &left); return; } 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, mins; int mib[2]; size_t size, i; char buf[256]; /* * Print time of day. */ (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"); } } #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) static int ttystat(const char *line, struct stat *st) { char ttybuf[MAXPATHLEN]; (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); return stat(ttybuf, st); } static void process(struct entry *ep) { struct stat st; time_t touched; int max; if ((max = strlen(ep->name)) > maxname) maxname = max; if ((max = strlen(ep->line)) > maxline) maxline = max; if ((max = strlen(ep->host)) > maxhost) maxhost = max; ep->tdev = 0; ep->idle = (time_t)-1; #ifdef SUPPORT_UTMP /* * Hack to recognize and correctly parse * ut entry made by ftpd. The "tty" used * by ftpd is not a real tty, just identifier in * form ftpPID. Pid parsed from the "tty name" * is used later to match corresponding process. * NB: This is only used for utmp entries. For utmpx, * we already have the pid. */ if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { ep->pid = strtol(ep->line + 3, NULL, 10); return; } #endif if (ttystat(ep->line, &st) == -1) return; ep->tdev = st.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 = st.st_atime; if (touched < ep->tv.tv_sec) { /* tty untouched since before login */ touched = ep->tv.tv_sec; } if ((ep->idle = now - touched) < 0) ep->idle = 0; } #endif static int proc_compare_wrapper(const struct kinfo_proc2 *p1, const struct kinfo_proc2 *p2) { struct kinfo_lwp *l1, *l2; int cnt; if (p1 == NULL) return 1; l1 = kvm_getlwps(kd, p1->p_pid, 0, sizeof(*l1), &cnt); if (l1 == NULL || cnt == 0) return 1; l2 = kvm_getlwps(kd, p2->p_pid, 0, sizeof(*l1), &cnt); if (l2 == NULL || cnt == 0) return 0; return proc_compare(p1, l1, p2, l2); } static void fixhost(struct entry *ep) { char host_buf[sizeof(ep->host)]; char *b, *m, *p, *r, *x; struct hostent *hp; union { struct in_addr l4; struct in6_addr l6; } l; strlcpy(host_buf, *ep->host ? ep->host : "-", sizeof(host_buf)); p = host_buf; /* * One ':' in hostname means X display number, more is IPv6. */ for (x = p; x < &host_buf[sizeof(host_buf)]; x++) if (*x == '\0' || *x == ':') break; if (x == p + sizeof(host_buf) || *x != ':') m = x = NULL; else { for (m = x + 1; m < &host_buf[sizeof(host_buf)]; m++) if (*m == '\0' || *m == ':') break; if (m == p + sizeof(host_buf) || *m != ':') { *x++ = '\0'; m = NULL; } else x = NULL; } /* * Leading '[' indicates an IP address inside brackets. */ b = NULL; if (!nflag && (*p == '[')) { for (b = p++; b < &host_buf[sizeof(host_buf)]; b++) if (*b == '\0' || *b == ']') break; if (b < &host_buf[sizeof(host_buf)] && *b == ']') { *b = '\0'; for (x = b + 1; x < &host_buf[sizeof(host_buf)]; x++) if (*x == '\0' || *x == ':') break; if (x < &host_buf[sizeof(host_buf)] && *x == ':') *x++ = '\0'; } else b = NULL; } int af = m ? AF_INET6 : AF_INET; size_t alen = m ? sizeof(l.l6) : sizeof(l.l4); if (!nflag && inet_pton(af, p, &l) && (hp = gethostbyaddr((char *)&l, alen, af))) r = hp->h_name; else { if (b) *b = ']'; r = host_buf; } if (domain[0] != '\0') { p = r; p += strlen(r); p -= strlen(domain); if (p > r && strcasecmp(p, domain) == 0) *p = '\0'; } if (x) (void)snprintf(ep->host, sizeof(ep->host), "%s:%s", r, x); else strlcpy(ep->host, r, sizeof(ep->host)); } static void usage(int wcmd) { if (wcmd) (void)fprintf(stderr, "Usage: %s [-Ahinw] [-M core] [-N system] [user]\n", getprogname()); else (void)fprintf(stderr, "Usage: %s\n", getprogname()); exit(1); }