Annotation of src/usr.bin/rwho/rwho.c, Revision 1.10
1.10 ! deraadt 1: /* $OpenBSD: rwho.c,v 1.9 1997/06/20 10:00:01 deraadt Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1983 The Regents of the University of California.
5: * 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: #ifndef lint
37: char copyright[] =
38: "@(#) Copyright (c) 1983 The Regents of the University of California.\n\
39: All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: /*static char sccsid[] = "from: @(#)rwho.c 5.5 (Berkeley) 6/1/90";*/
1.10 ! deraadt 44: static char rcsid[] = "$OpenBSD: rwho.c,v 1.9 1997/06/20 10:00:01 deraadt Exp $";
1.1 deraadt 45: #endif /* not lint */
46:
47: #include <sys/param.h>
48: #include <sys/file.h>
49: #include <dirent.h>
50: #include <protocols/rwhod.h>
51: #include <stdio.h>
52: #include <string.h>
1.3 deraadt 53: #include <unistd.h>
54: #include <stdlib.h>
1.8 deraadt 55: #include <vis.h>
1.9 deraadt 56: #include <err.h>
1.1 deraadt 57:
58: DIR *dirp;
59:
60: struct whod wd;
61: #define NUSERS 1000
62: struct myutmp {
63: char myhost[MAXHOSTNAMELEN];
64: int myidle;
65: struct outmp myutmp;
66: } myutmp[NUSERS];
67: int nusers;
68:
1.3 deraadt 69: int utmpcmp __P((struct myutmp *, struct myutmp *));
70:
1.1 deraadt 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:
1.3 deraadt 77: char *ctime();
1.1 deraadt 78: time_t now;
79: int aflg;
80:
1.10 ! deraadt 81: void
! 82: usage()
! 83: {
! 84: fprintf(stderr, "usage: rwho [-a]\n");
! 85: exit(1);
! 86: }
! 87:
1.3 deraadt 88: int
1.1 deraadt 89: main(argc, argv)
90: int argc;
91: char **argv;
92: {
93: extern char *optarg;
94: extern int optind;
95: int ch;
96: struct dirent *dp;
97: int cc, width;
98: register struct whod *w = &wd;
99: register struct whoent *we;
100: register struct myutmp *mp;
101: int f, n, i;
102: time_t time();
1.6 deraadt 103: int nhosts = 0;
1.1 deraadt 104:
1.5 millert 105: while ((ch = getopt(argc, argv, "a")) != -1)
1.1 deraadt 106: switch((char)ch) {
107: case 'a':
108: aflg = 1;
109: break;
110: case '?':
111: default:
1.10 ! deraadt 112: usage();
1.1 deraadt 113: }
1.10 ! deraadt 114: argc -= optind;
! 115: argv += optind;
! 116: if (argc != 0)
! 117: usage();
! 118:
1.1 deraadt 119: if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
120: perror(_PATH_RWHODIR);
121: exit(1);
122: }
123: mp = myutmp;
124: (void)time(&now);
1.3 deraadt 125: while ((dp = readdir(dirp))) {
1.1 deraadt 126: if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
127: continue;
128: f = open(dp->d_name, O_RDONLY);
129: if (f < 0)
130: continue;
131: cc = read(f, (char *)&wd, sizeof (struct whod));
132: if (cc < WHDRSIZE) {
133: (void) close(f);
134: continue;
135: }
1.6 deraadt 136: nhosts++;
1.1 deraadt 137: if (down(w,now)) {
138: (void) close(f);
139: continue;
140: }
141: cc -= WHDRSIZE;
142: we = w->wd_we;
143: for (n = cc / sizeof (struct whoent); n > 0; n--) {
144: if (aflg == 0 && we->we_idle >= 60*60) {
145: we++;
146: continue;
147: }
148: if (nusers >= NUSERS) {
149: printf("too many users\n");
150: exit(1);
151: }
152: mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
1.3 deraadt 153: (void) strncpy(mp->myhost, w->wd_hostname,
154: sizeof(mp->myhost)-1);
155: mp->myhost[sizeof(mp->myhost)-1] = '\0';
1.1 deraadt 156: nusers++; we++; mp++;
157: }
158: (void) close(f);
159: }
1.6 deraadt 160: if (nhosts == 0)
161: errx(0, "no hosts in %s.", _PATH_RWHODIR);
1.4 deraadt 162: qsort((char *)myutmp, nusers, sizeof (struct myutmp),
163: (int (*)())utmpcmp);
1.1 deraadt 164: mp = myutmp;
165: width = 0;
166: for (i = 0; i < nusers; i++) {
167: int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
168: if (j > width)
169: width = j;
170: mp++;
171: }
172: mp = myutmp;
173: for (i = 0; i < nusers; i++) {
1.8 deraadt 174: char buf[BUFSIZ], vis_user[4*8];
1.7 deraadt 175: (void)snprintf(buf, sizeof buf, "%s:%s", mp->myhost,
176: mp->myutmp.out_line);
1.8 deraadt 177: strvis(vis_user, mp->myutmp.out_name, VIS_CSTYLE);
1.1 deraadt 178: printf("%-8.8s %-*s %.12s",
1.8 deraadt 179: vis_user,
1.1 deraadt 180: width,
181: buf,
182: ctime((time_t *)&mp->myutmp.out_time)+4);
183: mp->myidle /= 60;
184: if (mp->myidle) {
185: if (aflg) {
186: if (mp->myidle >= 100*60)
187: mp->myidle = 100*60 - 1;
188: if (mp->myidle >= 60)
189: printf(" %2d", mp->myidle / 60);
190: else
191: printf(" ");
192: } else
193: printf(" ");
194: printf(":%02d", mp->myidle % 60);
195: }
196: printf("\n");
197: mp++;
198: }
199: exit(0);
200: }
201:
1.3 deraadt 202: int
1.1 deraadt 203: utmpcmp(u1, u2)
204: struct myutmp *u1, *u2;
205: {
206: int rc;
207:
208: rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8);
209: if (rc)
210: return (rc);
211: rc = strncmp(u1->myhost, u2->myhost, 8);
212: if (rc)
213: return (rc);
214: return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8));
215: }
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