1 /* $NetBSD: rwho.c,v 1.9 1997/10/19 15:03:06 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 /*static char sccsid[] = "from: @(#)rwho.c 8.1 (Berkeley) 6/6/93";*/ 44 __RCSID("$NetBSD: rwho.c,v 1.9 1997/10/19 15:03:06 mrg Exp $"); 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 50 #include <protocols/rwhod.h> 51 52 #include <dirent.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 DIR *dirp; 61 62 struct whod wd; 63 #define NUSERS 1000 64 struct myutmp { 65 char myhost[MAXHOSTNAMELEN]; 66 int myidle; 67 struct outmp myutmp; 68 } myutmp[NUSERS]; 69 int nusers; 70 71 #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we)) 72 /* 73 * this macro should be shared with ruptime. 74 */ 75 #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60) 76 77 int utmpcmp __P((const void *, const void *)); 78 int main __P((int, char **)); 79 80 time_t now; 81 int aflg; 82 83 int 84 main(argc, argv) 85 int argc; 86 char **argv; 87 { 88 extern char *optarg; 89 extern int optind; 90 int ch; 91 struct dirent *dp; 92 int cc, width; 93 struct whod *w = &wd; 94 struct whoent *we; 95 struct myutmp *mp; 96 int f, n, i, nhosts; 97 98 while ((ch = getopt(argc, argv, "a")) != -1) 99 switch((char)ch) { 100 case 'a': 101 aflg = 1; 102 break; 103 case '?': 104 default: 105 fprintf(stderr, "usage: rwho [-a]\n"); 106 exit(1); 107 } 108 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) { 109 perror(_PATH_RWHODIR); 110 exit(1); 111 } 112 mp = myutmp; 113 nhosts = 0; 114 (void)time(&now); 115 while ((dp = readdir(dirp)) != NULL) { 116 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 117 continue; 118 f = open(dp->d_name, O_RDONLY); 119 if (f < 0) 120 continue; 121 cc = read(f, (char *)&wd, sizeof (struct whod)); 122 if (cc < WHDRSIZE) { 123 (void) close(f); 124 continue; 125 } 126 nhosts++; 127 if (down(w,now)) { 128 (void) close(f); 129 continue; 130 } 131 cc -= WHDRSIZE; 132 we = w->wd_we; 133 for (n = cc / sizeof (struct whoent); n > 0; n--) { 134 if (aflg == 0 && we->we_idle >= 60*60) { 135 we++; 136 continue; 137 } 138 if (nusers >= NUSERS) { 139 printf("too many users\n"); 140 exit(1); 141 } 142 mp->myutmp = we->we_utmp; mp->myidle = we->we_idle; 143 (void) strcpy(mp->myhost, w->wd_hostname); 144 nusers++; we++; mp++; 145 } 146 (void) close(f); 147 } 148 if (nhosts == 0) 149 errx(0, "no hosts in %s.", _PATH_RWHODIR); 150 qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp); 151 mp = myutmp; 152 width = 0; 153 for (i = 0; i < nusers; i++) { 154 int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line); 155 if (j > width) 156 width = j; 157 mp++; 158 } 159 mp = myutmp; 160 for (i = 0; i < nusers; i++) { 161 char buf[BUFSIZ]; 162 (void)sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.out_line); 163 printf("%-8.8s %-*s %.12s", 164 mp->myutmp.out_name, 165 width, 166 buf, 167 ctime((time_t *)&mp->myutmp.out_time)+4); 168 mp->myidle /= 60; 169 if (mp->myidle) { 170 if (aflg) { 171 if (mp->myidle >= 100*60) 172 mp->myidle = 100*60 - 1; 173 if (mp->myidle >= 60) 174 printf(" %2d", mp->myidle / 60); 175 else 176 printf(" "); 177 } else 178 printf(" "); 179 printf(":%02d", mp->myidle % 60); 180 } 181 printf("\n"); 182 mp++; 183 } 184 exit(0); 185 } 186 187 int 188 utmpcmp(v1, v2) 189 const void *v1, *v2; 190 { 191 const struct myutmp *u1, *u2; 192 int rc; 193 194 u1 = v1; 195 u2 = v2; 196 rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8); 197 if (rc) 198 return (rc); 199 rc = strncmp(u1->myhost, u2->myhost, 8); 200 if (rc) 201 return (rc); 202 return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8)); 203 } 204