/usr.bin/ruptime/ruptime.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 295 lines · 233 code · 29 blank · 33 comment · 49 complexity · 3733d56f71539b358a4cea95687f6501 MD5 · raw file
- /*
- * Copyright (c) 1983, 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.
- * 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 const char copyright[] =
- "@(#) Copyright (c) 1983, 1993, 1994\n\
- The Regents of the University of California. All rights reserved.\n";
- #endif /* not lint */
- #ifndef lint
- static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94";
- #endif /* not lint */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include <sys/param.h>
- #include <protocols/rwhod.h>
- #include <dirent.h>
- #include <err.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include <unistd.h>
- static struct hs {
- struct whod hs_wd;
- int hs_nusers;
- } *hs;
- #define LEFTEARTH(h) (now - (h) > 4*24*60*60)
- #define ISDOWN(h) (now - (h)->hs_wd.wd_recvtime > 11 * 60)
- #define WHDRSIZE __offsetof(struct whod, wd_we)
- static size_t nhosts;
- static time_t now;
- static int rflg = 1;
- static DIR *dirp;
- static int hscmp(const void *, const void *);
- static char *interval(time_t, const char *);
- static int lcmp(const void *, const void *);
- static void ruptime(const char *, int, int (*)(const void *, const void *));
- static int tcmp(const void *, const void *);
- static int ucmp(const void *, const void *);
- static void usage(void);
- int
- main(int argc, char *argv[])
- {
- int (*cmp)(const void *, const void *);
- int aflg, ch;
- aflg = 0;
- cmp = hscmp;
- while ((ch = getopt(argc, argv, "alrut")) != -1)
- switch (ch) {
- case 'a':
- aflg = 1;
- break;
- case 'l':
- cmp = lcmp;
- break;
- case 'r':
- rflg = -1;
- break;
- case 't':
- cmp = tcmp;
- break;
- case 'u':
- cmp = ucmp;
- break;
- default:
- usage();
- }
- argc -= optind;
- argv += optind;
- if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
- err(1, "%s", _PATH_RWHODIR);
- ruptime(*argv, aflg, cmp);
- while (*argv++ != NULL) {
- if (*argv == NULL)
- break;
- ruptime(*argv, aflg, cmp);
- }
- exit(0);
- }
- static char *
- interval(time_t tval, const char *updown)
- {
- static char resbuf[32];
- int days, hours, minutes;
- if (tval < 0) {
- (void)snprintf(resbuf, sizeof(resbuf), "%s ??:??", updown);
- return (resbuf);
- }
- /* Round to minutes. */
- minutes = (tval + (60 - 1)) / 60;
- hours = minutes / 60;
- minutes %= 60;
- days = hours / 24;
- hours %= 24;
- if (days)
- (void)snprintf(resbuf, sizeof(resbuf),
- "%s %4d+%02d:%02d", updown, days, hours, minutes);
- else
- (void)snprintf(resbuf, sizeof(resbuf),
- "%s %2d:%02d", updown, hours, minutes);
- return (resbuf);
- }
- #define HS(a) ((const struct hs *)(a))
- /* Alphabetical comparison. */
- static int
- hscmp(const void *a1, const void *a2)
- {
- return (rflg *
- strcmp(HS(a1)->hs_wd.wd_hostname, HS(a2)->hs_wd.wd_hostname));
- }
- /* Load average comparison. */
- static int
- lcmp(const void *a1, const void *a2)
- {
- if (ISDOWN(HS(a1)))
- if (ISDOWN(HS(a2)))
- return (tcmp(a1, a2));
- else
- return (rflg);
- else if (ISDOWN(HS(a2)))
- return (-rflg);
- else
- return (rflg *
- (HS(a2)->hs_wd.wd_loadav[0] - HS(a1)->hs_wd.wd_loadav[0]));
- }
- static void
- ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *))
- {
- struct hs *hsp;
- struct whod *wd;
- struct whoent *we;
- struct dirent *dp;
- const char *hostname;
- int fd, i, maxloadav;
- size_t hspace;
- ssize_t cc;
- rewinddir(dirp);
- hsp = NULL;
- maxloadav = -1;
- (void)time(&now);
- for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
- if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0)
- continue;
- if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
- warn("%s", dp->d_name);
- continue;
- }
- if (nhosts == hspace) {
- if ((hs =
- realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
- err(1, NULL);
- hsp = hs + nhosts;
- }
- wd = &hsp->hs_wd;
- cc = read(fd, wd, sizeof(*wd));
- (void)close(fd);
- if (cc < (ssize_t)WHDRSIZE)
- continue;
- if (host != NULL) {
- hostname = wd->wd_hostname;
- if (strcasecmp(hostname, host) != 0)
- continue;
- }
- if (LEFTEARTH(wd->wd_recvtime))
- continue;
- for (i = 0; i < 2; i++)
- if (wd->wd_loadav[i] > maxloadav)
- maxloadav = wd->wd_loadav[i];
- for (hsp->hs_nusers = 0, we = &wd->wd_we[0];
- (char *)(we + 1) <= (char *)wd + cc; we++)
- if (aflg || we->we_idle < 3600)
- ++hsp->hs_nusers;
- ++hsp;
- ++nhosts;
- }
- if (nhosts == 0) {
- if (host == NULL)
- errx(1, "no hosts in %s", _PATH_RWHODIR);
- else
- warnx("host %s not in %s", host, _PATH_RWHODIR);
- }
- qsort(hs, nhosts, sizeof(hs[0]), cmp);
- for (i = 0; i < (int)nhosts; i++) {
- hsp = &hs[i];
- wd = &hsp->hs_wd;
- if (ISDOWN(hsp)) {
- (void)printf("%-25.25s%s\n", wd->wd_hostname,
- interval(now - hsp->hs_wd.wd_recvtime, "down"));
- continue;
- }
- (void)printf(
- "%-25.25s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n",
- wd->wd_hostname,
- interval((time_t)wd->wd_sendtime -
- (time_t)wd->wd_boottime, " up"),
- hsp->hs_nusers,
- hsp->hs_nusers == 1 ? ", " : "s,",
- maxloadav >= 1000 ? 5 : 4,
- wd->wd_loadav[0] / 100.0,
- maxloadav >= 1000 ? 5 : 4,
- wd->wd_loadav[1] / 100.0,
- maxloadav >= 1000 ? 5 : 4,
- wd->wd_loadav[2] / 100.0);
- }
- free(hs);
- hs = NULL;
- }
- /* Number of users comparison. */
- static int
- ucmp(const void *a1, const void *a2)
- {
- if (ISDOWN(HS(a1)))
- if (ISDOWN(HS(a2)))
- return (tcmp(a1, a2));
- else
- return (rflg);
- else if (ISDOWN(HS(a2)))
- return (-rflg);
- else
- return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
- }
- /* Uptime comparison. */
- static int
- tcmp(const void *a1, const void *a2)
- {
- return (rflg * (
- (ISDOWN(HS(a2)) ? HS(a2)->hs_wd.wd_recvtime - now
- : HS(a2)->hs_wd.wd_sendtime - HS(a2)->hs_wd.wd_boottime)
- -
- (ISDOWN(HS(a1)) ? HS(a1)->hs_wd.wd_recvtime - now
- : HS(a1)->hs_wd.wd_sendtime - HS(a1)->hs_wd.wd_boottime)
- ));
- }
- static void
- usage(void)
- {
- (void)fprintf(stderr, "usage: ruptime [-alrtu] [host ...]\n");
- exit(1);
- }