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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/lastcomm/lastcomm.c	Lines:	61	83	73.5 %
Date:	2017-11-13	Branches:	43	64	67.2 %


/*	$OpenBSD: lastcomm.c,v 1.26 2017/06/08 17:14:02 bluhm Exp $	*/
/*	$NetBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $	*/

/*
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>	/* NODEV */
#include <sys/stat.h>
#include <sys/acct.h>

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include <pwd.h>
#include "pathnames.h"

time_t	 expand(u_int);
char	*flagbits(int);
char	*getdev(dev_t);
int	 requested(char *[], struct acct *);
void	 usage(void);

#define SECSPERMIN	(60)
#define SECSPERHOUR	(60 * 60)

int
main(int argc, char *argv[])
{
	char *p;
	struct acct ab;
	struct stat sb;
	FILE *fp;
	off_t size;
	time_t t;
	double delta;
	int ch;
	char *acctfile;

	if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
		err(1, "pledge");

	acctfile = _PATH_ACCT;
	while ((ch = getopt(argc, argv, "f:")) != -1)
		switch(ch) {
		case 'f':
			acctfile = optarg;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	/* Open the file. */
	if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
		err(1, "%s", acctfile);

	/*
	 * Round off to integral number of accounting records, probably
	 * not necessary, but it doesn't hurt.
	 */
	size = sb.st_size - sb.st_size % sizeof(struct acct);

	/* Check if any records to display. */
	if (size < sizeof(struct acct))
		exit(0);

	/*
	 * Seek to before the last entry in the file; use lseek(2) in case
	 * the file is bigger than a "long".
	 */
	size -= sizeof(struct acct);
	if (lseek(fileno(fp), size, SEEK_SET) == -1)
		err(1, "%s", acctfile);

	for (;;) {
		if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
			err(1, "%s", acctfile);

		if (ab.ac_comm[0] == '\0') {
			ab.ac_comm[0] = '?';
			ab.ac_comm[1] = '\0';
		} else
			for (p = &ab.ac_comm[0];
			    p < &ab.ac_comm[sizeof ab.ac_comm] && *p; ++p)
				if (!isprint((unsigned char)*p))
					*p = '?';
		if (!*argv || requested(argv, &ab))
		{
			t = expand(ab.ac_utime) + expand(ab.ac_stime);
			(void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
			    (int)sizeof ab.ac_comm,
			    (int)sizeof ab.ac_comm,
			    ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE,
			    UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
			    UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
			    t / (double)AHZ, ctime(&ab.ac_btime));
			delta = expand(ab.ac_etime) / (double)AHZ;
			printf(" (%1.0f:%02.0f:%05.2f)\n",
			    delta / SECSPERHOUR,
			    fmod(delta, (double)SECSPERHOUR) / SECSPERMIN,
			    fmod(delta, (double)SECSPERMIN));
		}

		if (size == 0)
			break;
		/* seek to previous entry */
		if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
			err(1, "%s", acctfile);
		size -= sizeof(struct acct);
	}
	exit(0);
}

time_t
expand(u_int t)
{
	time_t nt;

	nt = t & 017777;
	t >>= 13;
	while (t) {
		t--;
		nt <<= 3;
	}
	return (nt);
}

char *
flagbits(int f)
{
	static char flags[20] = "-";
	char *p;

#define	BIT(flag, ch)	if (f & flag) *p++ = ch

	p = flags + 1;
	BIT(ASU, 'S');
	BIT(AFORK, 'F');
	BIT(ACOMPAT, 'C');
	BIT(ACORE, 'D');
	BIT(AXSIG, 'X');
	BIT(APLEDGE, 'P');
	BIT(ATRAP, 'T');
	*p = '\0';
	return (flags);
}

int
requested(char *argv[], struct acct *acp)
{
	do {
		if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
			return (1);
		if (!strcmp(getdev(acp->ac_tty), *argv))
			return (1);
		if (!strncmp(acp->ac_comm, *argv, sizeof acp->ac_comm))
			return (1);
	} while (*++argv);
	return (0);
}

char *
getdev(dev_t dev)
{
	static dev_t lastdev = (dev_t)-1;
	static char *lastname;

	if (dev == NODEV)			/* Special case. */
		return ("__");
	if (dev == lastdev)			/* One-element cache. */
		return (lastname);
	lastdev = dev;
	if ((lastname = devname(dev, S_IFCHR)) == NULL)
		lastname = "??";
	return (lastname);
}

void
usage(void)
{
	(void)fprintf(stderr,
	    "usage: lastcomm [-f file] [command ...] [user ...] [terminal ...]\n");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: lastcomm.c,v 1.26 2017/06/08 17:14:02 bluhm Exp $ */
2			/* $NetBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $ */
3
4			/*
5			* Copyright (c) 1980, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/param.h> /* NODEV */
34			#include <sys/stat.h>
35			#include <sys/acct.h>
36
37			#include <ctype.h>
38			#include <err.h>
39			#include <fcntl.h>
40			#include <math.h>
41			#include <stdio.h>
42			#include <stdlib.h>
43			#include <string.h>
44			#include <unistd.h>
45			#include <utmp.h>
46			#include <pwd.h>
47			#include "pathnames.h"
48
49			time_t expand(u_int);
50			char *flagbits(int);
51			char *getdev(dev_t);
52			int requested(char [], struct acct );
53			void usage(void);
54
55			#define SECSPERMIN (60)
56			#define SECSPERHOUR (60 * 60)
57
58			int
59			main(int argc, char *argv[])
60			{
61			char *p;
62		58	struct acct ab;
63		29	struct stat sb;
64			FILE *fp;
65			off_t size;
66			time_t t;
67			double delta;
68			int ch;
69			char *acctfile;
70
71	✗✓	29	if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
72			err(1, "pledge");
73
74			acctfile = _PATH_ACCT;
75	✗✓	58	while ((ch = getopt(argc, argv, "f:")) != -1)
76			switch(ch) {
77			case 'f':
78			acctfile = optarg;
79			break;
80			case '?':
81			default:
82			usage();
83			}
84		29	argc -= optind;
85		29	argv += optind;
86
87			/* Open the file. */
88	✓✗✓✗ ✗✓	116	if ((fp = fopen(acctfile, "r")) == NULL \|\| fstat(fileno(fp), &sb))
89			err(1, "%s", acctfile);
90
91			/*
92			* Round off to integral number of accounting records, probably
93			* not necessary, but it doesn't hurt.
94			*/
95		29	size = sb.st_size - sb.st_size % sizeof(struct acct);
96
97			/* Check if any records to display. */
98	✗✓	29	if (size < sizeof(struct acct))
99			exit(0);
100
101			/*
102			* Seek to before the last entry in the file; use lseek(2) in case
103			* the file is bigger than a "long".
104			*/
105		29	size -= sizeof(struct acct);
106	✓✗✗✓	87	if (lseek(fileno(fp), size, SEEK_SET) == -1)
107			err(1, "%s", acctfile);
108
109		1289	for (;;) {
110	✗✓	1289	if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
111			err(1, "%s", acctfile);
112
113	✗✓	1289	if (ab.ac_comm[0] == '\0') {
114			ab.ac_comm[0] = '?';
115			ab.ac_comm[1] = '\0';
116			} else
117	✓✓	12177	for (p = &ab.ac_comm[0];
118	✓✓	17057	p < &ab.ac_comm[sizeof ab.ac_comm] && *p; ++p)
119	✗✓	4880	if (!isprint((unsigned char)*p))
120			*p = '?';
121	✓✗✓✓	2578	if (!*argv \|\| requested(argv, &ab))
122			{
123		44	t = expand(ab.ac_utime) + expand(ab.ac_stime);
124		44	(void)printf("%-.s %-7s %-.s %-.s %6.2f secs %.16s",
125			(int)sizeof ab.ac_comm,
126			(int)sizeof ab.ac_comm,
127		44	ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE,
128		44	UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
129		44	UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
130		44	t / (double)AHZ, ctime(&ab.ac_btime));
131		44	delta = expand(ab.ac_etime) / (double)AHZ;
132		44	printf(" (%1.0f:%02.0f:%05.2f)\n",
133		44	delta / SECSPERHOUR,
134		44	fmod(delta, (double)SECSPERHOUR) / SECSPERMIN,
135		44	fmod(delta, (double)SECSPERMIN));
136		44	}
137
138	✓✓	1289	if (size == 0)
139			break;
140			/* seek to previous entry */
141	✗✓	1260	if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
142			err(1, "%s", acctfile);
143		1260	size -= sizeof(struct acct);
144			}
145			exit(0);
146			}
147
148			time_t
149			expand(u_int t)
150			{
151			time_t nt;
152
153		264	nt = t & 017777;
154		132	t >>= 13;
155	✗✓	264	while (t) {
156			t--;
157			nt <<= 3;
158			}
159		132	return (nt);
160			}
161
162			char *
163			flagbits(int f)
164			{
165			static char flags[20] = "-";
166			char *p;
167
168			#define BIT(flag, ch) if (f & flag) *p++ = ch
169
170			p = flags + 1;
171	✓✓	122	BIT(ASU, 'S');
172	✓✓	59	BIT(AFORK, 'F');
173	✗✓	44	BIT(ACOMPAT, 'C');
174	✓✓	49	BIT(ACORE, 'D');
175	✓✓	59	BIT(AXSIG, 'X');
176	✓✓	49	BIT(APLEDGE, 'P');
177	✓✓	48	BIT(ATRAP, 'T');
178		44	*p = '\0';
179		44	return (flags);
180			}
181
182			int
183			requested(char argv[], struct acct acp)
184			{
185		2578	do {
186	✗✓	1289	if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
187			return (1);
188	✗✓	1289	if (!strcmp(getdev(acp->ac_tty), *argv))
189			return (1);
190	✓✓	1289	if (!strncmp(acp->ac_comm, *argv, sizeof acp->ac_comm))
191		44	return (1);
192	✗✓	1245	} while (*++argv);
193		1245	return (0);
194		1289	}
195
196			char *
197			getdev(dev_t dev)
198			{
199			static dev_t lastdev = (dev_t)-1;
200			static char *lastname;
201
202	✗✓	2666	if (dev == NODEV) /* Special case. */
203			return ("__");
204	✓✓	1333	if (dev == lastdev) /* One-element cache. */
205		1304	return (lastname);
206		29	lastdev = dev;
207		29	if ((lastname = devname(dev, S_IFCHR)) == NULL)
208			lastname = "??";
209		29	return (lastname);
210		1333	}
211
212			void
213			usage(void)
214			{
215			(void)fprintf(stderr,
216			"usage: lastcomm [-f file] [command ...] [user ...] [terminal ...]\n");
217			exit(1);
218			}