Fix some WARNS6 regression that crept up in the last days.
[dragonfly.git] / usr.bin / lastcomm / lastcomm.c
CommitLineData
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1/*
2 * Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)lastcomm.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/lastcomm/lastcomm.c,v 1.10.2.3 2001/10/01 12:51:15 dd Exp $
1d1731fa 36 * $DragonFly: src/usr.bin/lastcomm/lastcomm.c,v 1.3 2003/10/04 20:36:47 hmp Exp $
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37 */
38
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39#include <sys/param.h>
40#include <sys/stat.h>
41#include <sys/acct.h>
42
43#include <ctype.h>
44#include <err.h>
45#include <fcntl.h>
5b0d3e5e 46#include <pwd.h>
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47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <unistd.h>
51#include <utmp.h>
52#include "pathnames.h"
53
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54time_t expand(u_int);
55char *flagbits(int);
56const char *getdev(dev_t);
57int requested(char *[], struct acct *);
58static void usage(void);
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59
60#define AC_UTIME 1 /* user */
61#define AC_STIME 2 /* system */
62#define AC_ETIME 4 /* elapsed */
63#define AC_CTIME 8 /* user + system time, default */
64
65#define AC_BTIME 16 /* starting time */
66#define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
67
68#define AC_HZ ((double)AHZ)
69
70int
1d1731fa 71main(int argc, char **argv)
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72{
73 char *p;
74 struct acct ab;
75 struct stat sb;
76 FILE *fp;
77 off_t size;
78 time_t t;
79 int ch;
80 const char *acctfile;
81 int flags = 0;
82
83 acctfile = _PATH_ACCT;
84 while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
85 switch((char)ch) {
86 case 'f':
87 acctfile = optarg;
88 break;
89
90 case 'u':
91 flags |= AC_UTIME; /* user time */
92 break;
93 case 's':
94 flags |= AC_STIME; /* system time */
95 break;
96 case 'e':
97 flags |= AC_ETIME; /* elapsed time */
98 break;
99 case 'c':
100 flags |= AC_CTIME; /* user + system time */
101 break;
102
103 case 'S':
104 flags |= AC_BTIME; /* starting time */
105 break;
106 case 'E':
107 /* exit time (starting time + elapsed time )*/
108 flags |= AC_FTIME;
109 break;
110
111 case '?':
112 default:
113 usage();
114 }
115
116 /* default user + system time and starting time */
117 if (!flags) {
118 flags = AC_CTIME | AC_BTIME;
119 }
120
121 argc -= optind;
122 argv += optind;
123
124 /* Open the file. */
125 if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
126 err(1, "%s", acctfile);
127
128 /*
129 * Round off to integral number of accounting records, probably
130 * not necessary, but it doesn't hurt.
131 */
132 size = sb.st_size - sb.st_size % sizeof(struct acct);
133
134 /* Check if any records to display. */
135 if ((unsigned)size < sizeof(struct acct))
136 exit(0);
137
138 /*
139 * Seek to before the last entry in the file; use lseek(2) in case
140 * the file is bigger than a "long".
141 */
142 size -= sizeof(struct acct);
143 if (lseek(fileno(fp), size, SEEK_SET) == -1)
144 err(1, "%s", acctfile);
145
146 for (;;) {
147 if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
148 err(1, "%s", acctfile);
149
150 if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
151 err(1, "%s", acctfile);
152
153 if (size == 0)
154 break;
155 size -= sizeof(struct acct);
156
157 if (ab.ac_comm[0] == '\0') {
158 ab.ac_comm[0] = '?';
159 ab.ac_comm[1] = '\0';
160 } else
161 for (p = &ab.ac_comm[0];
162 p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
163 if (!isprint(*p))
164 *p = '?';
165 if (*argv && !requested(argv, &ab))
166 continue;
167
168 (void)printf("%-*.*s %-7s %-*s %-*s",
169 AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
170 flagbits(ab.ac_flag),
171 UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
172 UT_LINESIZE, getdev(ab.ac_tty));
173
174
175 /* user + system time */
176 if (flags & AC_CTIME) {
177 (void)printf(" %6.2f secs",
178 (expand(ab.ac_utime) +
179 expand(ab.ac_stime))/AC_HZ);
180 }
181
182 /* usr time */
183 if (flags & AC_UTIME) {
184 (void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ);
185 }
186
187 /* system time */
188 if (flags & AC_STIME) {
189 (void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ);
190 }
191
192 /* elapsed time */
193 if (flags & AC_ETIME) {
194 (void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ);
195 }
196
197 /* starting time */
198 if (flags & AC_BTIME) {
199 (void)printf(" %.16s", ctime(&ab.ac_btime));
200 }
201
202 /* exit time (starting time + elapsed time )*/
203 if (flags & AC_FTIME) {
204 t = ab.ac_btime;
205 t += (time_t)(expand(ab.ac_etime)/AC_HZ);
206 (void)printf(" %.16s", ctime(&t));
207 }
208 printf("\n");
209 }
210 exit(0);
211}
212
213time_t
1d1731fa 214expand(u_int t)
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215{
216 time_t nt;
217
218 nt = t & 017777;
219 t >>= 13;
220 while (t) {
221 t--;
222 nt <<= 3;
223 }
224 return (nt);
225}
226
227char *
1d1731fa 228flagbits(int f)
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229{
230 static char flags[20] = "-";
231 char *p;
232
233#define BIT(flag, ch) if (f & flag) *p++ = ch
234
235 p = flags + 1;
236 BIT(ASU, 'S');
237 BIT(AFORK, 'F');
238 BIT(ACOMPAT, 'C');
239 BIT(ACORE, 'D');
240 BIT(AXSIG, 'X');
241 *p = '\0';
242 return (flags);
243}
244
245int
1d1731fa 246requested(char **argv, struct acct *acp)
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247{
248 const char *p;
249
250 do {
251 p = user_from_uid(acp->ac_uid, 0);
252 if (!strcmp(p, *argv))
253 return (1);
254 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
255 return (1);
256 if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
257 return (1);
258 } while (*++argv);
259 return (0);
260}
261
262const char *
1d1731fa 263getdev(dev_t dev)
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264{
265 static dev_t lastdev = (dev_t)-1;
266 static const char *lastname;
267
268 if (dev == NODEV) /* Special case. */
269 return ("__");
270 if (dev == lastdev) /* One-element cache. */
271 return (lastname);
272 lastdev = dev;
273 lastname = devname(dev, S_IFCHR);
274 return (lastname);
275}
276
277static void
1d1731fa 278usage(void)
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279{
280 (void)fprintf(stderr,
281"usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n");
282 exit(1);
283}