Annotation of src/usr.bin/rwho/rwho.c, Revision 1.8
1.8 ! deraadt 1: /* $OpenBSD: rwho.c,v 1.7 1997/04/13 02:21:16 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";*/
1.8 ! deraadt 44: static char rcsid[] = "$OpenBSD: rwho.c,v 1.7 1997/04/13 02:21:16 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>
1.1 deraadt 56:
57: DIR *dirp;
58:
59: struct whod wd;
60: #define NUSERS 1000
61: struct myutmp {
62: char myhost[MAXHOSTNAMELEN];
63: int myidle;
64: struct outmp myutmp;
65: } myutmp[NUSERS];
66: int nusers;
67:
1.3 deraadt 68: int utmpcmp __P((struct myutmp *, struct myutmp *));
69:
1.1 deraadt 70: #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we))
71: /*
72: * this macro should be shared with ruptime.
73: */
74: #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60)
75:
1.3 deraadt 76: char *ctime();
1.1 deraadt 77: time_t now;
78: int aflg;
79:
1.3 deraadt 80: int
1.1 deraadt 81: main(argc, argv)
82: int argc;
83: char **argv;
84: {
85: extern char *optarg;
86: extern int optind;
87: int ch;
88: struct dirent *dp;
89: int cc, width;
90: register struct whod *w = &wd;
91: register struct whoent *we;
92: register struct myutmp *mp;
93: int f, n, i;
94: time_t time();
1.6 deraadt 95: int nhosts = 0;
1.1 deraadt 96:
1.5 millert 97: while ((ch = getopt(argc, argv, "a")) != -1)
1.1 deraadt 98: switch((char)ch) {
99: case 'a':
100: aflg = 1;
101: break;
102: case '?':
103: default:
104: fprintf(stderr, "usage: rwho [-a]\n");
105: exit(1);
106: }
107: if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
108: perror(_PATH_RWHODIR);
109: exit(1);
110: }
111: mp = myutmp;
112: (void)time(&now);
1.3 deraadt 113: while ((dp = readdir(dirp))) {
1.1 deraadt 114: if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
115: continue;
116: f = open(dp->d_name, O_RDONLY);
117: if (f < 0)
118: continue;
119: cc = read(f, (char *)&wd, sizeof (struct whod));
120: if (cc < WHDRSIZE) {
121: (void) close(f);
122: continue;
123: }
1.6 deraadt 124: nhosts++;
1.1 deraadt 125: if (down(w,now)) {
126: (void) close(f);
127: continue;
128: }
129: cc -= WHDRSIZE;
130: we = w->wd_we;
131: for (n = cc / sizeof (struct whoent); n > 0; n--) {
132: if (aflg == 0 && we->we_idle >= 60*60) {
133: we++;
134: continue;
135: }
136: if (nusers >= NUSERS) {
137: printf("too many users\n");
138: exit(1);
139: }
140: mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
1.3 deraadt 141: (void) strncpy(mp->myhost, w->wd_hostname,
142: sizeof(mp->myhost)-1);
143: mp->myhost[sizeof(mp->myhost)-1] = '\0';
1.1 deraadt 144: nusers++; we++; mp++;
145: }
146: (void) close(f);
147: }
1.6 deraadt 148: if (nhosts == 0)
149: errx(0, "no hosts in %s.", _PATH_RWHODIR);
1.4 deraadt 150: qsort((char *)myutmp, nusers, sizeof (struct myutmp),
151: (int (*)())utmpcmp);
1.1 deraadt 152: mp = myutmp;
153: width = 0;
154: for (i = 0; i < nusers; i++) {
155: int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
156: if (j > width)
157: width = j;
158: mp++;
159: }
160: mp = myutmp;
161: for (i = 0; i < nusers; i++) {
1.8 ! deraadt 162: char buf[BUFSIZ], vis_user[4*8];
1.7 deraadt 163: (void)snprintf(buf, sizeof buf, "%s:%s", mp->myhost,
164: mp->myutmp.out_line);
1.8 ! deraadt 165: strvis(vis_user, mp->myutmp.out_name, VIS_CSTYLE);
1.1 deraadt 166: printf("%-8.8s %-*s %.12s",
1.8 ! deraadt 167: vis_user,
1.1 deraadt 168: width,
169: buf,
170: ctime((time_t *)&mp->myutmp.out_time)+4);
171: mp->myidle /= 60;
172: if (mp->myidle) {
173: if (aflg) {
174: if (mp->myidle >= 100*60)
175: mp->myidle = 100*60 - 1;
176: if (mp->myidle >= 60)
177: printf(" %2d", mp->myidle / 60);
178: else
179: printf(" ");
180: } else
181: printf(" ");
182: printf(":%02d", mp->myidle % 60);
183: }
184: printf("\n");
185: mp++;
186: }
187: exit(0);
188: }
189:
1.3 deraadt 190: int
1.1 deraadt 191: utmpcmp(u1, u2)
192: struct myutmp *u1, *u2;
193: {
194: int rc;
195:
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: }
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