/* $OpenBSD: ruptime.c,v 1.9 2003/06/03 02:56:15 millert Exp $ */ /* * Copyright (c) 1983 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. */ #ifndef lint char copyright[] = "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint /*static char sccsid[] = "from: @(#)ruptime.c 5.8 (Berkeley) 7/21/90";*/ static char rcsid[] = "$OpenBSD: ruptime.c,v 1.9 2003/06/03 02:56:15 millert Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include size_t nhosts, hspace = 20; struct hs { struct whod *hs_wd; int hs_nusers; } *hs; struct whod awhod; #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) #define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we)) time_t now; int rflg = 1; int hscmp(), ucmp(), lcmp(), tcmp(); void morehosts(void); int main(argc, argv) int argc; char **argv; { extern char *optarg; extern int optind; struct hs *hsp; struct whod *wd; struct whoent *we; DIR *dirp; struct dirent *dp; int aflg, cc, ch, f, i, maxloadav; char buf[sizeof(struct whod)]; int (*cmp)() = hscmp; time_t time(); char *interval(); aflg = 0; while ((ch = getopt(argc, argv, "alrut")) != -1) switch((char)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: (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); exit(1); } if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) { (void)fprintf(stderr, "ruptime: %s: %s.\n", _PATH_RWHODIR, strerror(errno)); exit(1); } morehosts(); hsp = hs; maxloadav = -1; while ((dp = readdir(dirp))) { if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) continue; if ((f = open(dp->d_name, O_RDONLY, 0)) < 0) { (void)fprintf(stderr, "ruptime: %s: %s\n", dp->d_name, strerror(errno)); continue; } cc = read(f, buf, sizeof(struct whod)); (void)close(f); if (cc < WHDRSIZE) continue; if (nhosts == hspace) { morehosts(); hsp = hs + nhosts; } /* NOSTRICT */ hsp->hs_wd = malloc((size_t)WHDRSIZE); wd = (struct whod *)buf; bcopy((char *)wd, (char *)hsp->hs_wd, (size_t)WHDRSIZE); hsp->hs_nusers = 0; for (i = 0; i < 2; i++) if (wd->wd_loadav[i] > maxloadav) maxloadav = wd->wd_loadav[i]; we = (struct whoent *)(buf+cc); while (--we >= wd->wd_we) if (aflg || we->we_idle < 3600) hsp->hs_nusers++; nhosts++; hsp++; } if (!nhosts) { (void)printf("ruptime: no hosts in %s.\n", _PATH_RWHODIR); exit(1); } (void)time(&now); qsort((char *)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); free((void *)hsp->hs_wd); } exit(0); } char * interval(tval, updown) time_t tval; char *updown; { static char resbuf[32]; int days, hours, minutes; if (tval < 0 || tval > 999*24*60*60) { (void)snprintf(resbuf, sizeof resbuf, "%s ??:??", updown); return(resbuf); } minutes = (tval + 59) / 60; /* round to minutes */ hours = minutes / 60; minutes %= 60; days = hours / 24; hours %= 24; if (days) (void)snprintf(resbuf, sizeof resbuf, "%s %3d+%02d:%02d", updown, days, hours, minutes); else (void)snprintf(resbuf, sizeof resbuf, "%s %2d:%02d", updown, hours, minutes); return(resbuf); } /* alphabetical comparison */ int hscmp(a1, a2) void *a1, *a2; { struct hs *h1 = a1, *h2 = a2; return(rflg * strcmp(h1->hs_wd->wd_hostname, h2->hs_wd->wd_hostname)); } /* load average comparison */ int lcmp(a1, a2) void *a1, *a2; { struct hs *h1 = a1, *h2 = a2; if (ISDOWN(h1)) if (ISDOWN(h2)) return(tcmp(a1, a2)); else return(rflg); else if (ISDOWN(h2)) return(-rflg); else return(rflg * (h2->hs_wd->wd_loadav[0] - h1->hs_wd->wd_loadav[0])); } /* number of users comparison */ int ucmp(a1, a2) void *a1, *a2; { struct hs *h1 = a1, *h2 = a2; if (ISDOWN(h1)) if (ISDOWN(h2)) return(tcmp(a1, a2)); else return(rflg); else if (ISDOWN(h2)) return(-rflg); else return(rflg * (h2->hs_nusers - h1->hs_nusers)); } /* uptime comparison */ int tcmp(a1, a2) void *a1, *a2; { struct hs *h1 = a1, *h2 = a2; return(rflg * ( (ISDOWN(h2) ? h2->hs_wd->wd_recvtime - now : h2->hs_wd->wd_sendtime - h2->hs_wd->wd_boottime) - (ISDOWN(h1) ? h1->hs_wd->wd_recvtime - now : h1->hs_wd->wd_sendtime - h1->hs_wd->wd_boottime) )); } void morehosts() { hs = realloc((char *)hs, (hspace *= 2) * sizeof(*hs)); if (hs == NULL) { (void)fprintf(stderr, "ruptime: %s.\n", strerror(ENOMEM)); exit(1); } }