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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char copyright[] =
32"@(#) Copyright (c) 1980, 1993\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)lastcomm.c	8.1 (Berkeley) 6/6/93";
39#endif
40#endif /* not lint */
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD$");
43
44#include <sys/param.h>
45#include <sys/stat.h>
46#include <sys/acct.h>
47
48#include <ctype.h>
49#include <err.h>
50#include <errno.h>
51#include <pwd.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <time.h>
56#include <unistd.h>
57#include "pathnames.h"
58
59/*XXX*/#include <inttypes.h>
60
61time_t	 expand(u_int);
62char	*flagbits(int);
63const	 char *getdev(dev_t);
64int	 readrec_forward(FILE *f, struct acctv2 *av2);
65int	 readrec_backward(FILE *f, struct acctv2 *av2);
66int	 requested(char *[], struct acctv2 *);
67static	 void usage(void);
68
69#define AC_UTIME 1 /* user */
70#define AC_STIME 2 /* system */
71#define AC_ETIME 4 /* elapsed */
72#define AC_CTIME 8 /* user + system time, default */
73
74#define AC_BTIME 16 /* starting time */
75#define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
76
77int
78main(int argc, char *argv[])
79{
80	struct acctv2 ab;
81	char *p;
82	FILE *fp;
83	int (*readrec)(FILE *f, struct acctv2 *av2);
84	time_t t;
85	int ch, rv;
86	const char *acctfile, *format;
87	char buf[1024];
88	int flags = 0;
89
90	acctfile = _PATH_ACCT;
91	format = NULL;
92	while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
93		switch((char)ch) {
94		case 'f':
95			acctfile = optarg;
96			break;
97
98		case 'u':
99			flags |= AC_UTIME; /* user time */
100			break;
101		case 's':
102			flags |= AC_STIME; /* system time */
103			break;
104		case 'e':
105			flags |= AC_ETIME; /* elapsed time */
106			break;
107        	case 'c':
108                        flags |= AC_CTIME; /* user + system time */
109			break;
110
111        	case 'S':
112                        flags |= AC_BTIME; /* starting time */
113			break;
114        	case 'E':
115			/* exit time (starting time + elapsed time )*/
116                        flags |= AC_FTIME;
117			break;
118
119		case '?':
120		default:
121			usage();
122		}
123
124	/* default user + system time and starting time */
125	if (!flags) {
126	    flags = AC_CTIME | AC_BTIME;
127	}
128
129	argc -= optind;
130	argv += optind;
131
132	if (argc > 0 && **argv == '+') {
133		format = *argv + 1; /* skip + */
134		argc--;
135		argv++;
136	}
137
138	if (strcmp(acctfile, "-") == 0) {
139		fp = stdin;
140		readrec = readrec_forward;
141	} else {
142		/* Open the file. */
143		if ((fp = fopen(acctfile, "r")) == NULL)
144			err(1, "could not open %s", acctfile);
145		if (fseek(fp, 0l, SEEK_END) == -1)
146			err(1, "seek to end of %s failed", acctfile);
147		readrec = readrec_backward;
148	}
149
150	while ((rv = readrec(fp, &ab)) == 1) {
151		for (p = &ab.ac_comm[0];
152		    p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
153			if (!isprint(*p))
154				*p = '?';
155
156		if (*argv && !requested(argv, &ab))
157			continue;
158
159		(void)printf("%-*.*s %-7s %-*s %-8s",
160			     AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
161			     flagbits(ab.ac_flagx),
162			     MAXLOGNAME - 1, user_from_uid(ab.ac_uid, 0),
163			     getdev(ab.ac_tty));
164
165
166		/* user + system time */
167		if (flags & AC_CTIME) {
168			(void)printf(" %6.3f secs",
169			    (ab.ac_utime + ab.ac_stime) / 1000000);
170		}
171
172		/* usr time */
173		if (flags & AC_UTIME) {
174			(void)printf(" %6.3f us", ab.ac_utime / 1000000);
175		}
176
177		/* system time */
178		if (flags & AC_STIME) {
179			(void)printf(" %6.3f sy", ab.ac_stime / 1000000);
180		}
181
182		/* elapsed time */
183		if (flags & AC_ETIME) {
184			(void)printf(" %8.3f es", ab.ac_etime / 1000000);
185		}
186
187		/* starting time */
188		if (flags & AC_BTIME) {
189			if (format != NULL) {
190				(void)strftime(buf, sizeof(buf), format,
191				    localtime(&ab.ac_btime));
192				(void)printf(" %s", buf);
193			} else
194				(void)printf(" %.16s", ctime(&ab.ac_btime));
195		}
196
197		/* exit time (starting time + elapsed time )*/
198		if (flags & AC_FTIME) {
199			t = ab.ac_btime;
200			t += (time_t)(ab.ac_etime / 1000000);
201			if (format != NULL) {
202				(void)strftime(buf, sizeof(buf), format,
203				    localtime(&t));
204				(void)printf(" %s", buf);
205			} else
206				(void)printf(" %.16s", ctime(&t));
207		}
208		printf("\n");
209 	}
210	if (rv == EOF)
211		err(1, "read record from %s failed", acctfile);
212
213	if (fflush(stdout))
214		err(1, "stdout");
215 	exit(0);
216}
217
218char *
219flagbits(int f)
220{
221	static char flags[20] = "-";
222	char *p;
223
224#define	BIT(flag, ch)	if (f & flag) *p++ = ch
225
226	p = flags + 1;
227	BIT(ASU, 'S');
228	BIT(AFORK, 'F');
229	BIT(ACOMPAT, 'C');
230	BIT(ACORE, 'D');
231	BIT(AXSIG, 'X');
232	*p = '\0';
233	return (flags);
234}
235
236int
237requested(char *argv[], struct acctv2 *acp)
238{
239	const char *p;
240
241	do {
242		p = user_from_uid(acp->ac_uid, 0);
243		if (!strcmp(p, *argv))
244			return (1);
245		if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
246			return (1);
247		if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
248			return (1);
249	} while (*++argv);
250	return (0);
251}
252
253const char *
254getdev(dev_t dev)
255{
256	static dev_t lastdev = (dev_t)-1;
257	static const char *lastname;
258
259	if (dev == NODEV)			/* Special case. */
260		return ("__");
261	if (dev == lastdev)			/* One-element cache. */
262		return (lastname);
263	lastdev = dev;
264	lastname = devname(dev, S_IFCHR);
265	return (lastname);
266}
267
268static void
269usage(void)
270{
271	(void)fprintf(stderr,
272	    "usage: lastcomm [-EScesu] [-f file] [+format] [command ...] "
273	    "[user ...] [terminal ...]\n");
274	exit(1);
275}
276