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