1 /* $NetBSD: rwho.c,v 1.13 2000/09/06 12:13:48 mjl 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 1.13 2000/09/06 12:13:48 mjl 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 <locale.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <time.h> 60 #include <fcntl.h> 61 #include <unistd.h> 62 63 void usage(void); 64 int utmpcmp(const void *, const void *); 65 66 DIR *dirp; 67 68 struct whod wd; 69 #define NUSERS 1000 70 struct myutmp { 71 char myhost[MAXHOSTNAMELEN]; 72 int myidle; 73 struct outmp myutmp; 74 } myutmp[NUSERS]; 75 int nusers; 76 77 #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we)) 78 /* 79 * this macro should be shared with ruptime. 80 */ 81 #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60) 82 83 int utmpcmp __P((const void *, const void *)); 84 int main __P((int, char **)); 85 86 time_t now; 87 int aflg; 88 89 int 90 main(int argc, char **argv) 91 { 92 int ch; 93 struct dirent *dp; 94 int cc, width; 95 struct whod *w = &wd; 96 struct whoent *we; 97 struct myutmp *mp; 98 int f, n, i, nhosts; 99 100 setlocale(LC_TIME, ""); 101 102 while ((ch = getopt(argc, argv, "a")) != -1) 103 switch((char)ch) { 104 case 'a': 105 aflg = 1; 106 break; 107 case '?': 108 default: 109 usage(); 110 } 111 112 if(optind != argc) 113 usage(); 114 115 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 116 err(1, "%s", _PATH_RWHODIR); 117 118 mp = myutmp; 119 nhosts = 0; 120 (void)time(&now); 121 while ((dp = readdir(dirp)) != NULL) { 122 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 123 continue; 124 f = open(dp->d_name, O_RDONLY); 125 if (f < 0) 126 continue; 127 cc = read(f, (char *)&wd, sizeof (struct whod)); 128 if (cc < WHDRSIZE) { 129 (void) close(f); 130 continue; 131 } 132 nhosts++; 133 if (down(w,now)) { 134 (void) close(f); 135 continue; 136 } 137 cc -= WHDRSIZE; 138 we = w->wd_we; 139 for (n = cc / sizeof (struct whoent); n > 0; n--) { 140 if (aflg == 0 && we->we_idle >= 60*60) { 141 we++; 142 continue; 143 } 144 if (nusers >= NUSERS) 145 err(1, "too many users"); 146 147 mp->myutmp = we->we_utmp; mp->myidle = we->we_idle; 148 (void) strcpy(mp->myhost, w->wd_hostname); 149 nusers++; we++; mp++; 150 } 151 (void) close(f); 152 } 153 if (nhosts == 0) 154 errx(0, "no hosts in %s.", _PATH_RWHODIR); 155 qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp); 156 mp = myutmp; 157 width = 0; 158 for (i = 0; i < nusers; i++) { 159 int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line); 160 if (j > width) 161 width = j; 162 mp++; 163 } 164 mp = myutmp; 165 for (i = 0; i < nusers; i++) { 166 char buf[BUFSIZ], cbuf[80]; 167 strftime(cbuf, sizeof(cbuf), "%c", localtime((time_t *)&mp->myutmp.out_time)); 168 /* cbuf = ctime((time_t *)&mp->myutmp.out_time); */ 169 (void)sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.out_line); 170 printf("%-8.8s %-*s %.12s", 171 mp->myutmp.out_name, 172 width, 173 buf, 174 cbuf + 4); 175 mp->myidle /= 60; 176 if (mp->myidle) { 177 if (aflg) { 178 if (mp->myidle >= 100*60) 179 mp->myidle = 100*60 - 1; 180 if (mp->myidle >= 60) 181 printf(" %2d", mp->myidle / 60); 182 else 183 printf(" "); 184 } else 185 printf(" "); 186 printf(":%02d", mp->myidle % 60); 187 } 188 printf("\n"); 189 mp++; 190 } 191 exit(0); 192 } 193 194 int 195 utmpcmp(const void *v1, const void *v2) 196 { 197 const struct myutmp *u1, *u2; 198 int rc; 199 200 u1 = v1; 201 u2 = v2; 202 rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8); 203 if (rc) 204 return (rc); 205 rc = strcmp(u1->myhost, u2->myhost); 206 if (rc) 207 return (rc); 208 return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8)); 209 } 210 211 void 212 usage(void) 213 { 214 fprintf(stderr, "usage: rwho [-a]\n"); 215 exit(1); 216 } 217