/* $NetBSD: ruptime.c,v 1.15 2011/09/06 18:29:19 joerg Exp $ */ /* * 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. * 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) 1983, 1993, 1994\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint /*static char sccsid[] = "from: @(#)ruptime.c 8.2 (Berkeley) 4/5/94";*/ __RCSID("$NetBSD: ruptime.c,v 1.15 2011/09/06 18:29:19 joerg Exp $"); #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include static struct hs { struct whod *hs_wd; int hs_nusers; } *hs; #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) #define WHDRSIZE (sizeof(struct whod) - \ sizeof (((struct whod *)0)->wd_we)) static size_t nhosts; static time_t now; static int rflg = 1; static int hscmp(const void *, const void *); static char *interval(time_t, const char *); static int lcmp(const void *, const void *); static int tcmp(const void *, const void *); static int ucmp(const void *, const void *); __dead static void usage(void); int main(int argc, char **argv) { struct dirent *dp; struct hs *hsp; struct whod *wd; struct whoent *we; DIR *dirp; size_t hspace, i; int aflg, cc, ch, fd, maxloadav; char buf[sizeof(struct whod)]; int (*cmp)(const void *, const void *); hsp = NULL; aflg = 0; cmp = hscmp; while ((ch = getopt(argc, argv, "alrtu")) != -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 (argc != 0) usage(); if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) err(1, "%s", _PATH_RWHODIR); maxloadav = -1; for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) continue; if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { warn("%s", dp->d_name); continue; } cc = read(fd, buf, sizeof(struct whod)); (void)close(fd); if (cc < (int)WHDRSIZE) continue; if (nhosts == hspace) { if ((hs = realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) err(1, "realloc"); hsp = hs + nhosts; } if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) err(1, "malloc"); memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); for (wd = (struct whod *)buf, i = 0; i < 2; ++i) if (wd->wd_loadav[i] > maxloadav) maxloadav = wd->wd_loadav[i]; for (hsp->hs_nusers = 0, we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) if (aflg || we->we_idle < 3600) ++hsp->hs_nusers; ++hsp; ++nhosts; } if (nhosts == 0) errx(0, "no hosts in %s", _PATH_RWHODIR); (void)time(&now); qsort(hs, nhosts, sizeof (hs[0]), cmp); for (i = 0; i < nhosts; i++) { hsp = &hs[i]; if (ISDOWN(hsp)) { (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, interval(now - hsp->hs_wd->wd_recvtime, "down")); continue; } (void)printf( "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", hsp->hs_wd->wd_hostname, interval((time_t)hsp->hs_wd->wd_sendtime - (time_t)hsp->hs_wd->wd_boottime, " up"), hsp->hs_nusers, hsp->hs_nusers == 1 ? ", " : "s,", maxloadav >= 1000 ? 5 : 4, hsp->hs_wd->wd_loadav[0] / 100.0, maxloadav >= 1000 ? 5 : 4, hsp->hs_wd->wd_loadav[1] / 100.0, maxloadav >= 1000 ? 5 : 4, hsp->hs_wd->wd_loadav[2] / 100.0); } 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 + (SECSPERMIN - 1)) / SECSPERMIN; hours = minutes / MINSPERHOUR; minutes %= MINSPERHOUR; days = hours / HOURSPERDAY; hours %= HOURSPERDAY; 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])); } /* 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]\n"); exit(1); }