diff options
Diffstat (limited to 'shell_cmds/w/w.c')
| -rw-r--r-- | shell_cmds/w/w.c | 776 |
1 files changed, 776 insertions, 0 deletions
diff --git a/shell_cmds/w/w.c b/shell_cmds/w/w.c new file mode 100644 index 0000000..e493734 --- /dev/null +++ b/shell_cmds/w/w.c @@ -0,0 +1,776 @@ +/*- + * Copyright (c) 1980, 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * Portions copyright (c) 2007 Apple Inc. 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 <sys/cdefs.h> + +#ifndef __APPLE__ +__FBSDID("$FreeBSD: src/usr.bin/w/w.c,v 1.58 2005/06/04 23:40:09 gad Exp $"); +#endif + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#ifndef lint +static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; +#endif + +/* + * 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> + +#ifndef __APPLE__ +#include <machine/cpu.h> +#endif +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#if HAVE_KVM +#include <kvm.h> +#endif +#include <langinfo.h> +#include <libutil.h> +#include <limits.h> +#include <locale.h> +#include <netdb.h> +#include <nlist.h> +#include <paths.h> +#include <resolv.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <timeconv.h> +#include <unistd.h> +#if HAVE_UTMPX +#include <utmpx.h> +/* use utmp values so formatting is the same */ +#define UT_NAMESIZE 8 +#define UT_LINESIZE 8 +#else /* HAVE_UTMPX */ +#include <utmp.h> +#endif /* HAVE_UTMPX */ +#include <vis.h> + +#include <TargetConditionals.h> + +#include "extern.h" + +struct timeval boottime; +#if !HAVE_UTMPX +struct utmp utmp; +#endif +struct winsize ws; +#if HAVE_KVM +kvm_t *kd; +#endif +time_t now; /* the current time of day */ +int ttywidth; /* width of tty */ +int argwidth; /* width of tty */ +int header = 1; /* true if -h flag: don't print heading */ +#if !HAVE_UTMPX +int nflag; /* true if -n flag: don't convert addrs */ +#endif +#ifndef __APPLE__ +int dflag; /* true if -d flag: output debug info */ +#endif +int sortidle; /* sort by idle time */ +int use_ampm; /* use AM/PM time */ +int use_comma; /* use comma as floats separator */ +char **sel_users; /* login array of particular users selected */ + +/* + * One of these per active utmp entry. + */ +struct entry { + struct entry *next; +#if HAVE_UTMPX + struct utmpx utmp; +#else + struct utmp utmp; +#endif + 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 */ + struct kinfo_proc *dkp; /* debug option proc list */ +} *ep, *ehead = NULL, **nextp = &ehead; + +#ifndef __APPLE__ +#define debugproc(p) *((struct kinfo_proc **)&(p)->ki_udata) +#else +#define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) +#endif + +/* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ +#define W_DISPHOSTSIZE 16 + +static void pr_header(time_t *, int); +static struct stat *ttystat(char *, int); +static void usage(int); +static int this_is_uptime(const char *s); +#if !HAVE_KVM +static void w_getargv(void); +#endif + +char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ + +int +main(int argc, char *argv[]) +{ + struct kinfo_proc *kp; + struct kinfo_proc *kprocbuf; + struct kinfo_proc *dkp; + struct stat *stp; +#if HAVE_UTMPX + struct utmpx *ux; +#else + FILE *ut; +#endif + time_t touched; +#if HAVE_KVM + int ch, i, nentries, nusers, wcmd, longidle, dropgid; + const char *memf, *nlistf, *p; +#else + int ch, i, nentries, nusers, wcmd, longidle; + const char *p; +#endif /* HAVE_KVM */ + char *x_suffix; +#ifdef __APPLE__ + char buf[MAXHOSTNAMELEN]; +#else + char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; + char fn[MAXHOSTNAMELEN]; +#endif /* __APPLE__ */ + char *dot; +#if !HAVE_KVM + int local_error = 0, retry_count = 0; + size_t bufSize = 0; + size_t orig_bufSize = 0; + int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 }; +#endif + + (void)setlocale(LC_ALL, ""); +#ifndef __APPLE__ + use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); + use_comma = (*nl_langinfo(RADIXCHAR) != ','); +#endif + + /* Are we w(1) or uptime(1)? */ + if (this_is_uptime(argv[0]) == 0) { + wcmd = 0; + p = ""; + } else { + wcmd = 1; + p = "dhiflM:N:nsuw"; + } + +#if HAVE_KVM + dropgid = 0; + memf = nlistf = _PATH_DEVNULL; +#endif + while ((ch = getopt(argc, argv, p)) != -1) + switch (ch) { +#ifndef __APPLE__ + case 'd': + dflag = 1; + break; +#endif + case 'h': + header = 0; + break; + case 'i': + sortidle = 1; + break; +#if HAVE_KVM + case 'M': + header = 0; + memf = optarg; + dropgid = 1; + break; + case 'N': + nlistf = optarg; + dropgid = 1; + break; +#endif /* HAVE_KVM */ +#if !HAVE_UTMPX + case 'n': + nflag = 1; + break; +#else /* !HAVE_UTMPX */ + case 'n': +#endif /* !HAVE_UTMPX */ + case 'f': case 'l': case 's': case 'u': case 'w': +#if !HAVE_KVM + case 'M': case 'N': +#endif +#ifdef __APPLE__ + case 'd': + warnx("[-MNdflnsuw] no longer supported"); +#else + warnx("[-flsuw] no longer supported"); +#endif + /* FALLTHROUGH */ + case '?': + default: + usage(wcmd); + } + argc -= optind; + argv += optind; + +#if !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) + if (!(_res.options & RES_INIT)) + res_init(); + _res.retrans = 2; /* resolver timeout to 2 seconds per try */ + _res.retry = 1; /* only try once.. */ +#endif + +#if HAVE_KVM + /* + * Discard setgid privileges if not the running kernel so that bad + * guys can't print interesting stuff from kernel memory. + */ + if (dropgid) + setgid(getgid()); + + if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) + errx(1, "%s", errbuf); +#endif + + (void)time(&now); +#if HAVE_UTMPX + setutxent(); +#else + if ((ut = fopen(_PATH_UTMP, "r")) == NULL) + err(1, "%s", _PATH_UTMP); +#endif + + if (*argv) + sel_users = argv; + +#if HAVE_UTMPX + for (nusers = 0; (ux = getutxent());) { + if (ux->ut_user[0] == '\0' || ux->ut_type != USER_PROCESS) + continue; + if (!(stp = ttystat(ux->ut_line, sizeof(ux->ut_line)))) + continue; /* corrupted record */ +#else + for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { + if (utmp.ut_name[0] == '\0') + continue; + if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) + continue; /* corrupted record */ +#endif + ++nusers; + if (wcmd == 0) + continue; + if (sel_users) { + int usermatch; + char **user; + + usermatch = 0; + for (user = sel_users; !usermatch && *user; user++) +#if HAVE_UTMPX + if (!strncmp(ux->ut_user, *user, sizeof(ux->ut_user))) +#else + if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) +#endif + usermatch = 1; + if (!usermatch) + continue; + } + if ((ep = calloc(1, sizeof(struct entry))) == NULL) + errx(1, "calloc"); + *nextp = ep; + nextp = &ep->next; +#if HAVE_UTMPX + memmove(&ep->utmp, ux, sizeof(*ux)); +#else + memmove(&ep->utmp, &utmp, sizeof(struct utmp)); +#endif + 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 + touched = stp->st_atime; +#ifdef __APPLE__ + if (touched < ep->utmp.ut_tv.tv_sec) { + /* tty untouched since before login */ + touched = ep->utmp.ut_tv.tv_sec; + } +#else + if (touched < ep->utmp.ut_time) { + /* tty untouched since before login */ + touched = ep->utmp.ut_time; + } +#endif + if ((ep->idle = now - touched) < 0) + ep->idle = 0; + } +#if HAVE_UTMPX + endutxent(); +#else + (void)fclose(ut); +#endif + + if (header || wcmd == 0) { + pr_header(&now, nusers); + if (wcmd == 0) { +#if HAVE_KVM + (void)kvm_close(kd); +#endif + exit(0); + } + +#define HEADER_USER "USER" +#define HEADER_TTY "TTY" +#define HEADER_FROM "FROM" +#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " +#define HEADER_WHAT "WHAT\n" +#define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ + sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ + (void)printf("%-*.*s %-*.*s %-*.*s %s", + UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, + UT_LINESIZE, UT_LINESIZE, HEADER_TTY, + W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, + HEADER_LOGIN_IDLE HEADER_WHAT); + } + +#if HAVE_KVM + if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) + err(1, "%s", kvm_geterr(kd)); +#else + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_ALL; + mib[3] = 0; + + if (sysctl(mib, 4, NULL, &bufSize, NULL, 0) < 0) { + perror("Failure calling sysctl"); + exit(1); + } + + kprocbuf = kp = (struct kinfo_proc *)malloc(bufSize); + + retry_count = 0; + orig_bufSize = bufSize; + for (retry_count = 0; ; retry_count++) { + local_error = 0; + bufSize = orig_bufSize; + if ((local_error = sysctl(mib, 4, kp, &bufSize, NULL, 0)) < 0) { + if (retry_count < 1000) { + sleep(1); + continue; + } + perror("Failure calling sysctl"); + exit(1); + } else if (local_error == 0) { + break; + } + sleep(1); + } + nentries = bufSize / sizeof(struct kinfo_proc); +#endif /* !HAVE_KVM */ + +#if !HAVE_KVM +#define ki_stat kp_proc.p_stat +#define ki_pgid kp_eproc.e_pgid +#define ki_tpgid kp_eproc.e_tpgid +#define ki_tdev kp_eproc.e_tdev +#endif /* !HAVE_KVM */ + for (i = 0; i < nentries; i++, kp++) { + if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) + continue; + for (ep = ehead; ep != NULL; ep = ep->next) { + if (ep->tdev == kp->ki_tdev) { + /* + * proc is associated with this terminal + */ + if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { + /* + * Proc is 'most interesting' + */ + if (proc_compare(ep->kp, kp)) + ep->kp = kp; + } + /* + * Proc debug option info; add to debug + * list using kinfo_proc ki_spare[0] + * as next pointer; ptr to ptr avoids the + * ptr = long assumption. + */ + dkp = ep->dkp; + ep->dkp = kp; +#ifndef __APPLE__ + debugproc(kp) = dkp; +#endif + } + } + } + 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 = strdup("-"); + continue; + } +#if HAVE_KVM + ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), + ep->kp->ki_comm, MAXCOMLEN); +#else + w_getargv(); +#endif /* HAVE_KVM */ + if (ep->args == NULL) + err(1, NULL); + } + /* sort by idle time */ + if (sortidle && ehead != NULL) { + struct entry *from, *save; + + from = ehead; + 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; + } + } + + for (ep = ehead; ep != NULL; ep = ep->next) { +#if HAVE_UTMPX + char host_buf[sizeof(ep->utmp.ut_host) + 1]; + strlcpy(host_buf, ep->utmp.ut_host, sizeof(host_buf)); +#else + char host_buf[UT_HOSTSIZE + 1]; + struct sockaddr_storage ss; + struct sockaddr *sa = (struct sockaddr *)&ss; + struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; + struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; + time_t t; + int isaddr; + + host_buf[UT_HOSTSIZE] = '\0'; + strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); +#endif /* HAVE_UTMPX */ + p = *host_buf ? host_buf : "-"; + if ((x_suffix = strrchr(p, ':')) != NULL) { + if ((dot = strchr(x_suffix, '.')) != NULL && + strchr(dot+1, '.') == NULL) + *x_suffix++ = '\0'; + else + x_suffix = NULL; + } +#if !HAVE_UTMPX + if (!nflag) { + /* Attempt to change an IP address into a name */ + isaddr = 0; + memset(&ss, '\0', sizeof(ss)); + if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { + lsin6->sin6_len = sizeof(*lsin6); + lsin6->sin6_family = AF_INET6; + isaddr = 1; + } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { + lsin->sin_len = sizeof(*lsin); + lsin->sin_family = AF_INET; + isaddr = 1; + } + if (isaddr && realhostname_sa(fn, sizeof(fn), sa, + sa->sa_len) == HOSTNAME_FOUND) + p = fn; + } +#endif /* !HAVE_UTMPX */ + if (x_suffix) { + (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); + p = buf; + } +#ifndef __APPLE__ + if (dflag) { + for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { + const char *ptr; + + ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), + dkp->ki_comm, MAXCOMLEN); + if (ptr == NULL) + ptr = "-"; + (void)printf("\t\t%-9d %s\n", + dkp->ki_pid, ptr); + } + } +#endif /* !__APPLE__ */ + (void)printf("%-*.*s %-*.*s %-*.*s ", +#if HAVE_UTMPX + UT_NAMESIZE, (int)sizeof(ep->utmp.ut_user), ep->utmp.ut_user, + UT_LINESIZE, (int)sizeof(ep->utmp.ut_line), +#else + UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, + UT_LINESIZE, UT_LINESIZE, +#endif + strncmp(ep->utmp.ut_line, "tty", 3) && + strncmp(ep->utmp.ut_line, "cua", 3) ? + ep->utmp.ut_line : ep->utmp.ut_line + 3, + W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); +#ifdef __APPLE__ + pr_attime(&ep->utmp.ut_tv.tv_sec, &now); +#else + t = _time_to_time32(ep->utmp.ut_time); + pr_attime(&t, &now); +#endif + longidle = pr_idle(ep->idle); + (void)printf("%.*s\n", argwidth - longidle, ep->args); +#ifdef __APPLE__ + free(ep->args); +#endif + } +#if HAVE_KVM + (void)kvm_close(kd); +#else + free(kprocbuf); +#endif /* HAVE_KVM */ + exit(0); +} + +static void +pr_header(time_t *nowp, int nusers) +{ + double avenrun[3]; + time_t uptime; + int days, hrs, i, mins, secs; + int mib[2]; + size_t size; + char buf[256]; + + /* + * Print time of day. + */ + if (strftime(buf, sizeof(buf), + use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 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; + if (uptime > 60) + uptime += 30; + days = uptime / 86400; + uptime %= 86400; + hrs = uptime / 3600; + uptime %= 3600; + mins = uptime / 60; + secs = uptime % 60; + (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" : ""); + else if (mins > 0) + (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); + else + (void)printf(" %d sec%s,", secs, secs > 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 < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { + if (use_comma && i > 0) + (void)printf(","); + (void)printf(" %.2f", avenrun[i]); + } + (void)printf("\n"); + } +} + +static struct stat * +ttystat(char *line, int sz) +{ + static struct stat sb; + char ttybuf[MAXPATHLEN]; + + (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); + if (stat(ttybuf, &sb) == 0) { + return (&sb); + } else { + warn("%s", ttybuf); + return (NULL); + } +} + +static void +usage(int wcmd) +{ + if (wcmd) + (void)fprintf(stderr, + "usage: w [hi] [user ...]\n"); + else + (void)fprintf(stderr, "usage: uptime\n"); + exit(1); +} + +static int +this_is_uptime(const char *s) +{ + const char *u; + + if ((u = strrchr(s, '/')) != NULL) + ++u; + else + u = s; + if (strcmp(u, "uptime") == 0) + return (0); + return (-1); +} + +#if !HAVE_KVM +static void +w_getargv(void) +{ + int mib[3], argmax; + size_t size; + char *procargs, *sp, *np, *cp; + + mib[0] = CTL_KERN; + mib[1] = KERN_ARGMAX; + + size = sizeof(argmax); + if (sysctl(mib, 2, &argmax, &size, NULL, 0) == -1) { + goto ERROR; + } + + procargs = malloc(argmax); + if (procargs == NULL) { + goto ERROR; + } + + mib[0] = CTL_KERN; + mib[1] = KERN_PROCARGS; + mib[2] = KI_PROC(ep)->p_pid; + + size = (size_t)argmax; + if (sysctl(mib, 3, procargs, &size, NULL, 0) == -1) { + goto ERROR_FREE; + } + + for (cp = procargs; cp < &procargs[size]; cp++) { + if (*cp == '\0') { + break; + } + } + if (cp == &procargs[size]) { + goto ERROR_FREE; + } + + sp = cp; + + for (np = NULL; cp < &procargs[size]; cp++) { + if (*cp == '\0') { + if (np != NULL) { + *np = ' '; + } + np = cp; + } else if (*cp == '=') { + break; + } + } + + for (np = sp; (np < &procargs[size]) && (*np == ' '); np++); + + ep->args = strdup(np); + free(procargs); + return; + +ERROR_FREE: + free(procargs); +ERROR: +/* + ep->args = malloc(2); + ep->args[0] = '-'; + ep->args[1] = '\0'; +*/ + asprintf(&ep->args, "%s", KI_PROC(ep)->p_comm); + return; +} +#endif /* HAVE_KVM */ |