1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)rwho.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/rwho/rwho.c,v 1.13.2.1 2002/03/12 19:49:09 phantom Exp $ 36 * $DragonFly: src/usr.bin/rwho/rwho.c,v 1.5 2008/10/16 01:52:33 swildner Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/file.h> 41 42 #include <protocols/rwhod.h> 43 44 #include <dirent.h> 45 #include <err.h> 46 #include <langinfo.h> 47 #include <locale.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <time.h> 52 #include <unistd.h> 53 #include <utmp.h> 54 55 struct whod wd; 56 57 #define NUSERS 1000 58 59 struct myutmp { 60 char myhost[sizeof(wd.wd_hostname)]; 61 int myidle; 62 struct outmp myutmp; 63 } myutmp[NUSERS]; 64 65 #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we)) 66 /* 67 * this macro should be shared with ruptime. 68 */ 69 #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60) 70 71 static void usage(void); 72 static int utmpcmp(const void *, const void *); 73 74 int 75 main(int argc, char **argv) 76 { 77 struct dirent *dp; 78 struct whod *w = &wd; 79 struct whoent *we; 80 struct myutmp *mp; 81 int f, n, i, ch; 82 int width, d_first, aflg; 83 int nusers; 84 size_t cc; 85 time_t now; 86 DIR *dirp; 87 88 aflg = nusers = 0; 89 setlocale(LC_TIME, ""); 90 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 91 92 while ((ch = getopt(argc, argv, "a")) != -1) 93 switch(ch) { 94 case 'a': 95 aflg = 1; 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 argc -= optind; 102 argv += optind; 103 104 if (argc != 0) 105 usage(); 106 107 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 108 err(1, "%s", _PATH_RWHODIR); 109 mp = myutmp; 110 time(&now); 111 while ((dp = readdir(dirp))) { 112 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 113 continue; 114 f = open(dp->d_name, O_RDONLY); 115 if (f < 0) 116 continue; 117 cc = read(f, (char *)&wd, sizeof (struct whod)); 118 if (cc < WHDRSIZE) { 119 close(f); 120 continue; 121 } 122 if (down(w,now)) { 123 close(f); 124 continue; 125 } 126 cc -= WHDRSIZE; 127 we = w->wd_we; 128 for (n = cc / sizeof (struct whoent); n > 0; n--) { 129 if (aflg == 0 && we->we_idle >= 60*60) { 130 we++; 131 continue; 132 } 133 if (nusers >= NUSERS) 134 errx(1, "too many users"); 135 mp->myutmp = we->we_utmp; mp->myidle = we->we_idle; 136 strcpy(mp->myhost, w->wd_hostname); 137 nusers++; we++; mp++; 138 } 139 close(f); 140 } 141 qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp); 142 mp = myutmp; 143 width = 0; 144 for (i = 0; i < nusers; i++) { 145 /* append one for the blank and use 8 for the out_line */ 146 int j = strlen(mp->myhost) + 1 + sizeof(mp->myutmp.out_line); 147 if (j > width) 148 width = j; 149 mp++; 150 } 151 mp = myutmp; 152 for (i = 0; i < nusers; i++) { 153 char buf[BUFSIZ], cbuf[80]; 154 155 strftime(cbuf, sizeof(cbuf), 156 d_first ? "%e %b %R" : "%b %e %R", 157 localtime((time_t *)&mp->myutmp.out_time)); 158 sprintf(buf, "%s:%-.*s", mp->myhost, 159 (int)sizeof(mp->myutmp.out_line), mp->myutmp.out_line); 160 printf("%-*.*s %-*s %s", 161 UT_NAMESIZE, (int)sizeof(mp->myutmp.out_name), 162 mp->myutmp.out_name, 163 width, 164 buf, 165 cbuf); 166 mp->myidle /= 60; 167 if (mp->myidle) { 168 if (aflg) { 169 if (mp->myidle >= 100*60) 170 mp->myidle = 100*60 - 1; 171 if (mp->myidle >= 60) 172 printf(" %2d", mp->myidle / 60); 173 else 174 printf(" "); 175 } else 176 printf(" "); 177 printf(":%02d", mp->myidle % 60); 178 } 179 printf("\n"); 180 mp++; 181 } 182 exit(0); 183 } 184 185 186 static void 187 usage(void) 188 { 189 fprintf(stderr, "usage: rwho [-a]\n"); 190 exit(1); 191 } 192 193 #define MYUTMP(a) ((const struct myutmp *)(a)) 194 195 static int 196 utmpcmp(const void *u1, const void *u2) 197 { 198 int rc; 199 200 rc = strncmp(MYUTMP(u1)->myutmp.out_name, MYUTMP(u2)->myutmp.out_name, 201 sizeof(MYUTMP(u2)->myutmp.out_name)); 202 if (rc) 203 return (rc); 204 rc = strcmp(MYUTMP(u1)->myhost, MYUTMP(u2)->myhost); 205 if (rc) 206 return (rc); 207 return (strncmp(MYUTMP(u1)->myutmp.out_line, MYUTMP(u2)->myutmp.out_line, 208 sizeof(MYUTMP(u2)->myutmp.out_line))); 209 } 210