Annotation of src/usr.bin/rwho/rwho.c, Revision 1.12
1.12 ! pjanzen 1: /* $OpenBSD: rwho.c,v 1.11 2001/01/31 20:12:49 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";*/
1.12 ! pjanzen 44: static char rcsid[] = "$OpenBSD: rwho.c,v 1.11 2001/01/31 20:12:49 deraadt Exp $";
1.1 deraadt 45: #endif /* not lint */
46:
1.12 ! pjanzen 47: #include <sys/types.h>
1.1 deraadt 48: #include <sys/param.h>
49: #include <sys/file.h>
50: #include <dirent.h>
51: #include <protocols/rwhod.h>
52: #include <stdio.h>
53: #include <string.h>
1.3 deraadt 54: #include <unistd.h>
55: #include <stdlib.h>
1.12 ! pjanzen 56: #include <time.h>
1.11 deraadt 57: #include <utmp.h>
1.8 deraadt 58: #include <vis.h>
1.9 deraadt 59: #include <err.h>
1.1 deraadt 60:
61: DIR *dirp;
62:
63: struct whod wd;
64: #define NUSERS 1000
65: struct myutmp {
66: char myhost[MAXHOSTNAMELEN];
67: int myidle;
68: struct outmp myutmp;
69: } myutmp[NUSERS];
70: int nusers;
71:
1.3 deraadt 72: int utmpcmp __P((struct myutmp *, struct myutmp *));
73:
1.1 deraadt 74: #define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we))
75: /*
76: * this macro should be shared with ruptime.
77: */
78: #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60)
79:
80: time_t now;
81: int aflg;
82:
1.10 deraadt 83: void
84: usage()
85: {
86: fprintf(stderr, "usage: rwho [-a]\n");
87: exit(1);
88: }
89:
1.3 deraadt 90: int
1.1 deraadt 91: main(argc, argv)
92: int argc;
93: char **argv;
94: {
95: extern char *optarg;
96: extern int optind;
97: int ch;
98: struct dirent *dp;
99: int cc, width;
100: register struct whod *w = &wd;
101: register struct whoent *we;
102: register struct myutmp *mp;
103: int f, n, i;
1.6 deraadt 104: int nhosts = 0;
1.1 deraadt 105:
1.5 millert 106: while ((ch = getopt(argc, argv, "a")) != -1)
1.1 deraadt 107: switch((char)ch) {
108: case 'a':
109: aflg = 1;
110: break;
111: case '?':
112: default:
1.10 deraadt 113: usage();
1.1 deraadt 114: }
1.10 deraadt 115: argc -= optind;
116: argv += optind;
117: if (argc != 0)
118: usage();
119:
1.1 deraadt 120: if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
121: perror(_PATH_RWHODIR);
122: exit(1);
123: }
124: mp = myutmp;
125: (void)time(&now);
1.3 deraadt 126: while ((dp = readdir(dirp))) {
1.1 deraadt 127: if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
128: continue;
129: f = open(dp->d_name, O_RDONLY);
130: if (f < 0)
131: continue;
132: cc = read(f, (char *)&wd, sizeof (struct whod));
133: if (cc < WHDRSIZE) {
134: (void) close(f);
135: continue;
136: }
1.6 deraadt 137: nhosts++;
1.1 deraadt 138: if (down(w,now)) {
139: (void) close(f);
140: continue;
141: }
142: cc -= WHDRSIZE;
143: we = w->wd_we;
144: for (n = cc / sizeof (struct whoent); n > 0; n--) {
145: if (aflg == 0 && we->we_idle >= 60*60) {
146: we++;
147: continue;
148: }
1.12 ! pjanzen 149: if (nusers >= NUSERS)
! 150: errx(1, "too many users");
1.1 deraadt 151: mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
1.3 deraadt 152: (void) strncpy(mp->myhost, w->wd_hostname,
153: sizeof(mp->myhost)-1);
154: mp->myhost[sizeof(mp->myhost)-1] = '\0';
1.1 deraadt 155: nusers++; we++; mp++;
156: }
157: (void) close(f);
158: }
1.6 deraadt 159: if (nhosts == 0)
160: errx(0, "no hosts in %s.", _PATH_RWHODIR);
1.4 deraadt 161: qsort((char *)myutmp, nusers, sizeof (struct myutmp),
162: (int (*)())utmpcmp);
1.1 deraadt 163: mp = myutmp;
164: width = 0;
165: for (i = 0; i < nusers; i++) {
166: int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
167: if (j > width)
168: width = j;
169: mp++;
170: }
171: mp = myutmp;
172: for (i = 0; i < nusers; i++) {
1.11 deraadt 173: char buf[BUFSIZ], vis_user[4*UT_NAMESIZE];
1.7 deraadt 174: (void)snprintf(buf, sizeof buf, "%s:%s", mp->myhost,
175: mp->myutmp.out_line);
1.8 deraadt 176: strvis(vis_user, mp->myutmp.out_name, VIS_CSTYLE);
1.11 deraadt 177: printf("%-*.*s %-*s %.12s",
178: UT_NAMESIZE, UT_NAMESIZE, vis_user,
1.12 ! pjanzen 179: width, buf,
1.1 deraadt 180: ctime((time_t *)&mp->myutmp.out_time)+4);
181: mp->myidle /= 60;
182: if (mp->myidle) {
183: if (aflg) {
184: if (mp->myidle >= 100*60)
185: mp->myidle = 100*60 - 1;
186: if (mp->myidle >= 60)
187: printf(" %2d", mp->myidle / 60);
188: else
189: printf(" ");
190: } else
191: printf(" ");
192: printf(":%02d", mp->myidle % 60);
193: }
194: printf("\n");
195: mp++;
196: }
197: exit(0);
198: }
199:
1.3 deraadt 200: int
1.1 deraadt 201: utmpcmp(u1, u2)
202: struct myutmp *u1, *u2;
203: {
204: int rc;
205:
206: rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8);
207: if (rc)
208: return (rc);
209: rc = strncmp(u1->myhost, u2->myhost, 8);
210: if (rc)
211: return (rc);
212: return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8));
213: }
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