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ruptime.c
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Editing: ruptime.c
/* * SPDX-License-Identifier: BSD-3-Clause * * 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. */ #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 iwidth(int); 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); } /* Width to print a small nonnegative integer. */ static int iwidth(int w) { if (w < 10) return (1); if (w < 100) return (2); if (w < 1000) return (3); if (w < 10000) return (4); return (5); } #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; int fd, hostnamewidth, i, loadavwidth[3], userswidth, w; size_t hspace; ssize_t cc; rewinddir(dirp); hsp = NULL; hostnamewidth = 0; loadavwidth[0] = 4; loadavwidth[1] = 4; loadavwidth[2] = 4; userswidth = 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 && strcasecmp(wd->wd_hostname, host) != 0) continue; if (LEFTEARTH(wd->wd_recvtime)) continue; if (hostnamewidth < (int)strlen(wd->wd_hostname)) hostnamewidth = (int)strlen(wd->wd_hostname); if (!ISDOWN(hsp)) { for (i = 0; i < 3; i++) { w = iwidth(wd->wd_loadav[i] / 100) + 3; if (loadavwidth[i] < w) loadavwidth[i] = w; } 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; if (userswidth < iwidth(hsp->hs_nusers)) userswidth = iwidth(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); w = userswidth + loadavwidth[0] + loadavwidth[1] + loadavwidth[2]; if (hostnamewidth + w > 41) hostnamewidth = 41 - w; /* limit to 79 cols */ for (i = 0; i < (int)nhosts; i++) { hsp = &hs[i]; wd = &hsp->hs_wd; if (ISDOWN(hsp)) { (void)printf("%-*.*s %s\n", hostnamewidth, hostnamewidth, wd->wd_hostname, interval(now - hsp->hs_wd.wd_recvtime, "down")); continue; } (void)printf( "%-*.*s %s, %*d user%s load %*.2f, %*.2f, %*.2f\n", hostnamewidth, hostnamewidth, wd->wd_hostname, interval((time_t)wd->wd_sendtime - (time_t)wd->wd_boottime, " up"), userswidth, hsp->hs_nusers, hsp->hs_nusers == 1 ? ", " : "s,", loadavwidth[0], wd->wd_loadav[0] / 100.0, loadavwidth[1], wd->wd_loadav[1] / 100.0, loadavwidth[2], 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); }
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