[apple/shell_cmds.git] / lastcomm / lastcomm.c

/*	$NetBSD: lastcomm.c,v 1.21 2009/04/12 13:08:31 lukem 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)lastcomm.c	8.2 (Berkeley) 4/29/95";
#endif
__RCSID("$NetBSD: lastcomm.c,v 1.21 2009/04/12 13:08:31 lukem Exp $");
#endif /* not lint */

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

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <math.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <struct.h>
#include <time.h>
#include <tzfile.h>
#include <unistd.h>
/* definitions from utmp.h */
#define UT_NAMESIZE     8
#define UT_LINESIZE     8
#include "pathnames.h"

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

int	main(int, char **);

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;
	const char *acctfile = _PATH_ACCT;

	setprogname(argv[0]);

	while ((ch = getopt(argc, argv, "f:")) != -1)
		switch((char)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 < (off_t)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[fldsiz(acct, 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)fldsiz(acct, ac_comm),
			     (int)fldsiz(acct, 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",
			       floor(delta / SECSPERHOUR),
			       floor(fmod(delta, SECSPERHOUR) / SECSPERMIN),
			       fmod(delta, SECSPERMIN));
		}
		/* are we at the beginning of the file yet? */
		if (size == 0)
			break;
		/* seek backward over the one we read and the next to read */
		if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
			err(1, "%s", acctfile);
		/* and account for its size */
		size -= sizeof(struct acct);
	}
	exit(0);
}

static time_t
expand(u_int t)
{
	time_t nt;

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

static 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');
	*p = '\0';
	return (flags);
}

static 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, fldsiz(acct, ac_comm)))
			return (1);
	} while (*++argv);
	return (0);
}

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

static void
usage(void)
{
	(void)fprintf(stderr,
	    "Usage: %s [ -f file ] [command ...] [user ...] [tty ...]\n",
	    getprogname());
	exit(1);
}
Commit	Line	Data
f14763b6	1	/* $NetBSD: lastcomm.c,v 1.21 2009/04/12 13:08:31 lukem Exp $ */
44bd5ea7 A	2
	3	/*
	4	* Copyright (c) 1980, 1993
	5	* The Regents of the University of California. 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.
f14763b6	15	* 3. Neither the name of the University nor the names of its contributors
44bd5ea7 A	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	#include <sys/cdefs.h>
	33	#ifndef lint
f14763b6 A	34	__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
f14763b6 A	35	The Regents of the University of California. All rights reserved.");
44bd5ea7 A	36	#endif /* not lint */
	37
	38	#ifndef lint
	39	#if 0
	40	static char sccsid[] = "@(#)lastcomm.c 8.2 (Berkeley) 4/29/95";
	41	#endif
f14763b6	42	__RCSID("$NetBSD: lastcomm.c,v 1.21 2009/04/12 13:08:31 lukem Exp $");
44bd5ea7 A	43	#endif /* not lint */
	44
	45	#include <sys/param.h>
	46	#include <sys/stat.h>
	47	#include <sys/acct.h>
	48
	49	#include <ctype.h>
	50	#include <err.h>
	51	#include <fcntl.h>
	52	#include <math.h>
	53	#include <pwd.h>
	54	#include <stdio.h>
	55	#include <stdlib.h>
	56	#include <string.h>
	57	#include <struct.h>
	58	#include <time.h>
	59	#include <tzfile.h>
	60	#include <unistd.h>
ddb4a88b A	61	/* definitions from utmp.h */
	62	#define UT_NAMESIZE 8
	63	#define UT_LINESIZE 8
44bd5ea7 A	64	#include "pathnames.h"
44bd5ea7 A	65
f14763b6 A	66	static time_t expand(u_int);
	67	static char *flagbits(int);
	68	static const char *getdev(dev_t);
	69	static int requested(char [], struct acct );
	70	static void usage(void) __dead;
	71
	72	int main(int, char **);
44bd5ea7 A	73
44bd5ea7 A	74	int
f14763b6	75	main(int argc, char *argv[])
44bd5ea7 A	76	{
	77	char *p;
	78	struct acct ab;
	79	struct stat sb;
	80	FILE *fp;
	81	off_t size;
	82	time_t t;
	83	double delta;
	84	int ch;
f14763b6 A	85	const char *acctfile = _PATH_ACCT;
	86
	87	setprogname(argv[0]);
44bd5ea7	88
44bd5ea7 A	89	while ((ch = getopt(argc, argv, "f:")) != -1)
	90	switch((char)ch) {
	91	case 'f':
	92	acctfile = optarg;
	93	break;
	94	case '?':
	95	default:
	96	usage();
	97	}
	98	argc -= optind;
	99	argv += optind;
	100
	101	/* Open the file. */
	102	if ((fp = fopen(acctfile, "r")) == NULL \|\| fstat(fileno(fp), &sb))
	103	err(1, "%s", acctfile);
	104
	105	/*
	106	* Round off to integral number of accounting records, probably
	107	* not necessary, but it doesn't hurt.
	108	*/
	109	size = sb.st_size - sb.st_size % sizeof(struct acct);
	110
	111	/* Check if any records to display. */
f14763b6	112	if (size < (off_t)sizeof(struct acct))
44bd5ea7 A	113	exit(0);
	114
	115	/*
	116	* Seek to before the last entry in the file; use lseek(2) in case
	117	* the file is bigger than a "long".
	118	*/
	119	size -= sizeof(struct acct);
	120	if (lseek(fileno(fp), size, SEEK_SET) == -1)
	121	err(1, "%s", acctfile);
	122
	123	for (;;) {
	124	if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
	125	err(1, "%s", acctfile);
	126
	127	if (ab.ac_comm[0] == '\0') {
	128	ab.ac_comm[0] = '?';
	129	ab.ac_comm[1] = '\0';
	130	} else
	131	for (p = &ab.ac_comm[0];
	132	p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p)
f14763b6	133	if (!isprint((unsigned char)*p))
44bd5ea7 A	134	*p = '?';
	135	if (!*argv \|\| requested(argv, &ab)) {
	136
	137	t = expand(ab.ac_utime) + expand(ab.ac_stime);
	138	(void)printf(
	139	"%-.s %-7s %-.s %-.s %6.2f secs %.16s",
	140	(int)fldsiz(acct, ac_comm),
	141	(int)fldsiz(acct, ac_comm),
	142	ab.ac_comm, flagbits(ab.ac_flag),
	143	UT_NAMESIZE, UT_NAMESIZE,
	144	user_from_uid(ab.ac_uid, 0), UT_LINESIZE,
	145	UT_LINESIZE, getdev(ab.ac_tty),
	146	t / (double)AHZ, ctime(&ab.ac_btime));
	147	delta = expand(ab.ac_etime) / (double)AHZ;
	148	printf(" (%1.0f:%02.0f:%05.2f)\n",
f14763b6 A	149	floor(delta / SECSPERHOUR),
f14763b6 A	150	floor(fmod(delta, SECSPERHOUR) / SECSPERMIN),
44bd5ea7 A	151	fmod(delta, SECSPERMIN));
	152	}
	153	/* are we at the beginning of the file yet? */
	154	if (size == 0)
	155	break;
	156	/* seek backward over the one we read and the next to read */
	157	if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
	158	err(1, "%s", acctfile);
	159	/* and account for its size */
	160	size -= sizeof(struct acct);
	161	}
	162	exit(0);
	163	}
	164
f14763b6 A	165	static time_t
f14763b6 A	166	expand(u_int t)
44bd5ea7 A	167	{
	168	time_t nt;
	169
	170	nt = t & 017777;
	171	t >>= 13;
	172	while (t) {
	173	t--;
	174	nt <<= 3;
	175	}
	176	return (nt);
	177	}
	178
f14763b6 A	179	static char *
f14763b6 A	180	flagbits(int f)
44bd5ea7 A	181	{
	182	static char flags[20] = "-";
	183	char *p;
	184
	185	#define BIT(flag, ch) if (f & flag) *p++ = ch
	186
	187	p = flags + 1;
	188	BIT(ASU, 'S');
	189	BIT(AFORK, 'F');
	190	BIT(ACOMPAT, 'C');
	191	BIT(ACORE, 'D');
	192	BIT(AXSIG, 'X');
	193	*p = '\0';
	194	return (flags);
	195	}
	196
f14763b6 A	197	static int
f14763b6 A	198	requested(char argv[], struct acct acp)
44bd5ea7 A	199	{
	200	do {
	201	if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
	202	return (1);
	203	if (!strcmp(getdev(acp->ac_tty), *argv))
	204	return (1);
	205	if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
	206	return (1);
	207	} while (*++argv);
	208	return (0);
	209	}
	210
f14763b6 A	211	static const char *
f14763b6 A	212	getdev(dev_t dev)
44bd5ea7 A	213	{
44bd5ea7 A	214	static dev_t lastdev = (dev_t)-1;
f14763b6	215	static const char *lastname;
44bd5ea7 A	216
	217	if (dev == NODEV) /* Special case. */
	218	return ("__");
	219	if (dev == lastdev) /* One-element cache. */
	220	return (lastname);
	221	lastdev = dev;
	222	if ((lastname = devname(dev, S_IFCHR)) == NULL)
	223	lastname = "??";
	224	return (lastname);
	225	}
	226
f14763b6 A	227	static void
f14763b6 A	228	usage(void)
44bd5ea7 A	229	{
44bd5ea7 A	230	(void)fprintf(stderr,
f14763b6 A	231	"Usage: %s [ -f file ] [command ...] [user ...] [tty ...]\n",
f14763b6 A	232	getprogname());
44bd5ea7 A	233	exit(1);
44bd5ea7 A	234	}