1 /* $OpenBSD: ruptime.c,v 1.14 2004/10/10 03:50:40 mickey Exp $ */
2
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 const char copyright[] =
34 "@(#) Copyright (c) 1983 The Regents of the University of California.\n\
35 All rights reserved.\n";
36 #endif /* not lint */
37
38 #ifndef lint
39 /*static const char sccsid[] = "from: @(#)ruptime.c 5.8 (Berkeley) 7/21/90";*/
40 static const char rcsid[] = "$OpenBSD: ruptime.c,v 1.14 2004/10/10 03:50:40 mickey Exp $";
41 #endif /* not lint */
42
43 #include <sys/param.h>
44 #include <sys/file.h>
45 #include <dirent.h>
46 #include <protocols/rwhod.h>
47 #include <stdio.h>
48 #include <unistd.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <errno.h>
52 #include <err.h>
53
54 size_t nhosts, hspace = 20;
55 struct hs {
56 struct whod *hs_wd;
57 int hs_nusers;
58 } *hs;
59 struct whod awhod;
60
61 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60)
62 #define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we))
63
64 time_t now;
65 int rflg = 1;
66 int hscmp(const void *, const void *);
67 int ucmp(const void *, const void *);
68 int lcmp(const void *, const void *);
69 int tcmp(const void *, const void *);
70 char *interval(time_t, char *);
71
72 void morehosts(void);
73
74 int
main(int argc,char * argv[])75 main(int argc, char *argv[])
76 {
77 extern char *__progname;
78 struct hs *hsp;
79 struct whod *wd;
80 struct whoent *we;
81 DIR *dirp;
82 struct dirent *dp;
83 int aflg, cc, ch, f, i, maxloadav;
84 char buf[sizeof(struct whod)];
85 int (*cmp)(const void *, const void *) = hscmp;
86
87 aflg = 0;
88 while ((ch = getopt(argc, argv, "alrut")) != -1)
89 switch((char)ch) {
90 case 'a':
91 aflg = 1;
92 break;
93 case 'l':
94 cmp = lcmp;
95 break;
96 case 'r':
97 rflg = -1;
98 break;
99 case 't':
100 cmp = tcmp;
101 break;
102 case 'u':
103 cmp = ucmp;
104 break;
105 default:
106 fprintf(stderr, "usage: %s [-alrut]\n", __progname);
107 exit(1);
108 }
109
110 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
111 err(1, "%s", _PATH_RWHODIR);
112 morehosts();
113 hsp = hs;
114 maxloadav = -1;
115 while ((dp = readdir(dirp))) {
116 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
117 continue;
118 if ((f = open(dp->d_name, O_RDONLY, 0)) < 0) {
119 warn("%s", dp->d_name);
120 continue;
121 }
122 cc = read(f, buf, sizeof(struct whod));
123 (void)close(f);
124 if (cc < WHDRSIZE)
125 continue;
126 if (nhosts == hspace) {
127 morehosts();
128 hsp = hs + nhosts;
129 }
130 /* NOSTRICT */
131 hsp->hs_wd = malloc((size_t)WHDRSIZE);
132 wd = (struct whod *)buf;
133 memmove((char *)hsp->hs_wd, (char *)wd, (size_t)WHDRSIZE);
134 hsp->hs_nusers = 0;
135 for (i = 0; i < 2; i++)
136 if (wd->wd_loadav[i] > maxloadav)
137 maxloadav = wd->wd_loadav[i];
138 we = (struct whoent *)(buf+cc);
139 while (--we >= wd->wd_we)
140 if (aflg || we->we_idle < 3600)
141 hsp->hs_nusers++;
142 nhosts++;
143 hsp++;
144 }
145 if (!nhosts)
146 errx(1, "no hosts in %s.", _PATH_RWHODIR);
147 (void)time(&now);
148 qsort((char *)hs, nhosts, sizeof (hs[0]), cmp);
149 for (i = 0; i < nhosts; i++) {
150 hsp = &hs[i];
151 if (ISDOWN(hsp)) {
152 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
153 interval(now - hsp->hs_wd->wd_recvtime, "down"));
154 continue;
155 }
156 (void)printf(
157 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n",
158 hsp->hs_wd->wd_hostname,
159 interval((time_t)hsp->hs_wd->wd_sendtime -
160 (time_t)hsp->hs_wd->wd_boottime, " up"),
161 hsp->hs_nusers,
162 hsp->hs_nusers == 1 ? ", " : "s,",
163 maxloadav >= 1000 ? 5 : 4,
164 hsp->hs_wd->wd_loadav[0] / 100.0,
165 maxloadav >= 1000 ? 5 : 4,
166 hsp->hs_wd->wd_loadav[1] / 100.0,
167 maxloadav >= 1000 ? 5 : 4,
168 hsp->hs_wd->wd_loadav[2] / 100.0);
169 free((void *)hsp->hs_wd);
170 }
171 exit(0);
172 }
173
174 char *
interval(time_t tval,char * updown)175 interval(time_t tval, char *updown)
176 {
177 static char resbuf[32];
178 int days, hours, minutes;
179
180 if (tval < 0 || tval > 999*24*60*60) {
181 (void)snprintf(resbuf, sizeof resbuf, "%s ??:??", updown);
182 return(resbuf);
183 }
184 minutes = (tval + 59) / 60; /* round to minutes */
185 hours = minutes / 60; minutes %= 60;
186 days = hours / 24; hours %= 24;
187 if (days)
188 (void)snprintf(resbuf, sizeof resbuf, "%s %3d+%02d:%02d",
189 updown, days, hours, minutes);
190 else
191 (void)snprintf(resbuf, sizeof resbuf, "%s %2d:%02d",
192 updown, hours, minutes);
193 return(resbuf);
194 }
195
196 /* alphabetical comparison */
197 int
hscmp(const void * a1,const void * a2)198 hscmp(const void *a1, const void *a2)
199 {
200 const struct hs *h1 = a1, *h2 = a2;
201
202 return(rflg * strcmp(h1->hs_wd->wd_hostname, h2->hs_wd->wd_hostname));
203 }
204
205 /* load average comparison */
206 int
lcmp(const void * a1,const void * a2)207 lcmp(const void *a1, const void *a2)
208 {
209 const struct hs *h1 = a1, *h2 = a2;
210
211 if (ISDOWN(h1))
212 if (ISDOWN(h2))
213 return(tcmp(a1, a2));
214 else
215 return(rflg);
216 else if (ISDOWN(h2))
217 return(-rflg);
218 else
219 return(rflg *
220 (h2->hs_wd->wd_loadav[0] - h1->hs_wd->wd_loadav[0]));
221 }
222
223 /* number of users comparison */
224 int
ucmp(const void * a1,const void * a2)225 ucmp(const void *a1, const void *a2)
226 {
227 const struct hs *h1 = a1, *h2 = a2;
228
229 if (ISDOWN(h1))
230 if (ISDOWN(h2))
231 return(tcmp(a1, a2));
232 else
233 return(rflg);
234 else if (ISDOWN(h2))
235 return(-rflg);
236 else
237 return(rflg * (h2->hs_nusers - h1->hs_nusers));
238 }
239
240 /* uptime comparison */
241 int
tcmp(const void * a1,const void * a2)242 tcmp(const void *a1, const void *a2)
243 {
244 const struct hs *h1 = a1, *h2 = a2;
245
246 return(rflg * (
247 (ISDOWN(h2) ? h2->hs_wd->wd_recvtime - now
248 : h2->hs_wd->wd_sendtime - h2->hs_wd->wd_boottime)
249 -
250 (ISDOWN(h1) ? h1->hs_wd->wd_recvtime - now
251 : h1->hs_wd->wd_sendtime - h1->hs_wd->wd_boottime)
252 ));
253 }
254
255 void
morehosts(void)256 morehosts(void)
257 {
258 hs = realloc((char *)hs, (hspace *= 2) * sizeof(*hs));
259 if (hs == NULL)
260 err(1, "realloc");
261 }
262