/* $OpenBSD: rwho.c,v 1.14 2003/04/30 21:30:38 vincent 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static const char sccsid[] = "from: @(#)rwho.c 5.5 (Berkeley) 6/1/90"; #else static const char rcsid[] = "$OpenBSD: rwho.c,v 1.14 2003/04/30 21:30:38 vincent Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include DIR *dirp; struct whod wd; #define NUSERS 1000 struct myutmp { char myhost[MAXHOSTNAMELEN]; int myidle; struct { char out_line[9]; /* tty name + NUL */ char out_name[9]; /* user id + NUL */ int32_t out_time; /* time on */ } myutmp; } myutmp[NUSERS]; int nusers; int utmpcmp(const void *, const void *); __dead void usage(void); #define WHDRSIZE (sizeof(wd) - sizeof(wd.wd_we)) /* * this macro should be shared with ruptime. */ #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60) time_t now; int aflg; int main(int argc, char **argv) { int ch; struct dirent *dp; int cc, width; struct whod *w = &wd; struct whoent *we; struct myutmp *mp; int f, n, i; int nhosts = 0; while ((ch = getopt(argc, argv, "a")) != -1) switch((char)ch) { case 'a': aflg = 1; break; default: usage(); } argc -= optind; argv += optind; if (argc != 0) usage(); if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) err(1, _PATH_RWHODIR); mp = myutmp; (void)time(&now); while ((dp = readdir(dirp))) { if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) continue; f = open(dp->d_name, O_RDONLY); if (f < 0) continue; cc = read(f, &wd, sizeof(struct whod)); if (cc < WHDRSIZE) { (void)close(f); continue; } nhosts++; if (down(w,now)) { (void)close(f); continue; } cc -= WHDRSIZE; we = w->wd_we; for (n = cc / sizeof(struct whoent); n > 0; n--) { if (aflg == 0 && we->we_idle >= 60*60) { we++; continue; } if (nusers >= NUSERS) errx(1, "too many users"); memcpy(mp->myhost, w->wd_hostname, sizeof(mp->myhost)-1); mp->myhost[sizeof(mp->myhost)-1] = '\0'; mp->myidle = we->we_idle; /* * Copy we->we_utmp by hand since the name and line * variables in myutmp have room for NUL (unlike outmp). */ memcpy(mp->myutmp.out_line, we->we_utmp.out_line, sizeof(mp->myutmp.out_line)-1); mp->myutmp.out_line[sizeof(mp->myutmp.out_line)-1] = 0; memcpy(mp->myutmp.out_name, we->we_utmp.out_name, sizeof(mp->myutmp.out_name)-1); mp->myutmp.out_name[sizeof(mp->myutmp.out_name)-1] = 0; mp->myutmp.out_time = we->we_utmp.out_time; nusers++; we++; mp++; } (void)close(f); } if (nhosts == 0) errx(0, "no hosts in %s.", _PATH_RWHODIR); qsort(myutmp, nusers, sizeof(struct myutmp), utmpcmp); mp = myutmp; width = 0; for (i = 0; i < nusers; i++) { int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line); if (j > width) width = j; mp++; } mp = myutmp; for (i = 0; i < nusers; i++) { char buf[BUFSIZ], vis_user[4 * sizeof(mp->myutmp.out_name) + 1]; (void)snprintf(buf, sizeof(buf), "%s:%s", mp->myhost, mp->myutmp.out_line); strnvis(vis_user, mp->myutmp.out_name, sizeof vis_user, VIS_CSTYLE); printf("%-*.*s %-*s %.12s", UT_NAMESIZE, UT_NAMESIZE, vis_user, width, buf, ctime((time_t *)&mp->myutmp.out_time)+4); mp->myidle /= 60; if (mp->myidle) { if (aflg) { if (mp->myidle >= 100*60) mp->myidle = 100*60 - 1; if (mp->myidle >= 60) printf(" %2d", mp->myidle / 60); else printf(" "); } else printf(" "); printf(":%02d", mp->myidle % 60); } printf("\n"); mp++; } exit(0); } int utmpcmp(const void *v1, const void *v2) { int rc; const struct myutmp *u1 = (struct myutmp *)v1; const struct myutmp *u2 = (struct myutmp *)v2; rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8); if (rc) return (rc); rc = strncmp(u1->myhost, u2->myhost, 8); if (rc) return (rc); return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8)); } void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-a]\n", __progname); exit(1); }