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Diffstat (limited to 'usr.bin/w/w.c')
-rw-r--r-- | usr.bin/w/w.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/usr.bin/w/w.c b/usr.bin/w/w.c new file mode 100644 index 0000000..1a7b526 --- /dev/null +++ b/usr.bin/w/w.c @@ -0,0 +1,426 @@ +/*- + * 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); +} |