[unix-history] / usr.bin / lastcomm / lastcomm.c

/*
 * Copyright (c) 1980 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)lastcomm.c	5.11 (Berkeley) 6/1/90";
#endif /* not lint */

/*
 * last command
 */
#include <sys/param.h>
#include <sys/acct.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <utmp.h>
#include <struct.h>
#include <ctype.h>
#include <stdio.h>
#include "pathnames.h"

struct	acct buf[DEV_BSIZE / sizeof (struct acct)];

time_t	expand();
char	*flagbits();
char	*getdev();

main(argc, argv)
	int argc;
	char *argv[];
{
	extern int optind;
	extern char *optarg;
	register struct acct *acp;
	register int bn, cc;
	struct stat sb;
	int ch, fd;
	char *acctfile, *ctime(), *strcpy(), *user_from_uid();
	long lseek();

	acctfile = _PATH_ACCT;
	while ((ch = getopt(argc, argv, "f:")) != EOF)
		switch((char)ch) {
		case 'f':
			acctfile = optarg;
			break;
		case '?':
		default:
			fputs("lastcomm [ -f file ]\n", stderr);
			exit(1);
		}
	argv += optind;

	fd = open(acctfile, O_RDONLY);
	if (fd < 0) {
		perror(acctfile);
		exit(1);
	}
	(void)fstat(fd, &sb);
	setpassent(1);
	for (bn = btodb(sb.st_size); bn >= 0; bn--) {
		(void)lseek(fd, (off_t)dbtob(bn), L_SET);
		cc = read(fd, buf, DEV_BSIZE);
		if (cc < 0) {
			perror("read");
			break;
		}
		acp = buf + (cc / sizeof (buf[0])) - 1;
		for (; acp >= buf; acp--) {
			register char *cp;
			time_t x;

			if (acp->ac_comm[0] == '\0')
				(void)strcpy(acp->ac_comm, "?");
			for (cp = &acp->ac_comm[0];
			     cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
			     cp++)
				if (!isascii(*cp) || iscntrl(*cp))
					*cp = '?';
			if (*argv && !ok(argv, acp))
				continue;
			x = expand(acp->ac_utime) + expand(acp->ac_stime);
			printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
				fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
				acp->ac_comm, flagbits(acp->ac_flag),
				UT_NAMESIZE, user_from_uid(acp->ac_uid, 0),
				UT_LINESIZE, getdev(acp->ac_tty),
				x / (double)AHZ, ctime(&acp->ac_btime));
		}
	}
}

time_t
expand (t)
	unsigned t;
{
	register time_t nt;

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

char *
flagbits(f)
	register int f;
{
	static char flags[20];
	char *p, *strcpy();

#define	BIT(flag, ch)	if (f & flag) *p++ = ch;
	p = strcpy(flags, "-    ");
	BIT(ASU, 'S');
	BIT(AFORK, 'F');
	BIT(ACOMPAT, 'C');
	BIT(ACORE, 'D');
	BIT(AXSIG, 'X');
	return (flags);
}

ok(argv, acp)
	register char *argv[];
	register struct acct *acp;
{
	register char *cp;
	char *user_from_uid();

	do {
		cp = user_from_uid(acp->ac_uid, 0);
		if (!strcmp(cp, *argv)) 
			return(1);
		if ((cp = getdev(acp->ac_tty)) && !strcmp(cp, *argv))
			return(1);
		if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
			return(1);
	} while (*++argv);
	return(0);
}

#include <sys/dir.h>

#define N_DEVS		43		/* hash value for device names */
#define NDEVS		500		/* max number of file names in /dev */

struct	devhash {
	dev_t	dev_dev;
	char	dev_name [UT_LINESIZE + 1];
	struct	devhash * dev_nxt;
};
struct	devhash *dev_hash[N_DEVS];
struct	devhash *dev_chain;
#define HASH(d)	(((int) d) % N_DEVS)

setupdevs()
{
	register DIR * fd;
	register struct devhash * hashtab;
	register ndevs = NDEVS;
	struct direct * dp;
	char *malloc();

	/*NOSTRICT*/
	hashtab = (struct devhash *)malloc(NDEVS * sizeof(struct devhash));
	if (hashtab == (struct devhash *)0) {
		fputs("No mem for dev table\n", stderr);
		return;
	}
	if ((fd = opendir(_PATH_DEV)) == NULL) {
		perror(_PATH_DEV);
		return;
	}
	while (dp = readdir(fd)) {
		if (dp->d_ino == 0)
			continue;
		if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console")
					 && strcmp(dp->d_name, "vga"))
			continue;
		(void)strncpy(hashtab->dev_name, dp->d_name, UT_LINESIZE);
		hashtab->dev_name[UT_LINESIZE] = 0;
		hashtab->dev_nxt = dev_chain;
		dev_chain = hashtab;
		hashtab++;
		if (--ndevs <= 0)
			break;
	}
	closedir(fd);
}

char *
getdev(dev)
	dev_t dev;
{
	register struct devhash *hp, *nhp;
	struct stat statb;
	char name[fldsiz(devhash, dev_name) + 6];
	static dev_t lastdev = (dev_t) -1;
	static char *lastname;
	static int init = 0;
	char *strcpy(), *strcat();

	if (dev == NODEV)
		return ("__");
	if (dev == lastdev)
		return (lastname);
	if (!init) {
		setupdevs();
		init++;
	}
	for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
		if (hp->dev_dev == dev) {
			lastdev = dev;
			return (lastname = hp->dev_name);
		}
	for (hp = dev_chain; hp; hp = nhp) {
		nhp = hp->dev_nxt;
		(void)strcpy(name, _PATH_DEV);
		strcat(name, hp->dev_name);
		if (stat(name, &statb) < 0)	/* name truncated usually */
			continue;
		if ((statb.st_mode & S_IFMT) != S_IFCHR)
			continue;
		hp->dev_dev = statb.st_rdev;
		hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
		dev_hash[HASH(hp->dev_dev)] = hp;
		if (hp->dev_dev == dev) {
			dev_chain = nhp;
			lastdev = dev;
			return (lastname = hp->dev_name);
		}
	}
	dev_chain = (struct devhash *) 0;
	return ("??");
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* 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.
	32	*/
	33
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1980 Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)lastcomm.c 5.11 (Berkeley) 6/1/90";
	42	#endif /* not lint */
	43
	44	/*
	45	* last command
	46	*/
	47	#include <sys/param.h>
	48	#include <sys/acct.h>
	49	#include <sys/file.h>
	50	#include <sys/stat.h>
	51	#include <utmp.h>
	52	#include <struct.h>
	53	#include <ctype.h>
	54	#include <stdio.h>
	55	#include "pathnames.h"
	56
	57	struct acct buf[DEV_BSIZE / sizeof (struct acct)];
	58
	59	time_t expand();
	60	char *flagbits();
	61	char *getdev();
	62
	63	main(argc, argv)
	64	int argc;
65	char *argv[];
66	{
67	extern int optind;
68	extern char *optarg;
69	register struct acct *acp;
70	register int bn, cc;
71	struct stat sb;
72	int ch, fd;
73	char acctfile, ctime(), strcpy(), user_from_uid();
74	long lseek();
75
76	acctfile = _PATH_ACCT;
77	while ((ch = getopt(argc, argv, "f:")) != EOF)
78	switch((char)ch) {
79	case 'f':
80	acctfile = optarg;
81	break;
82	case '?':
83	default:
84	fputs("lastcomm [ -f file ]\n", stderr);
85	exit(1);
86	}
87	argv += optind;
88
89	fd = open(acctfile, O_RDONLY);
90	if (fd < 0) {
91	perror(acctfile);
92	exit(1);
93	}
94	(void)fstat(fd, &sb);
95	setpassent(1);
96	for (bn = btodb(sb.st_size); bn >= 0; bn--) {
97	(void)lseek(fd, (off_t)dbtob(bn), L_SET);
98	cc = read(fd, buf, DEV_BSIZE);
99	if (cc < 0) {
100	perror("read");
101	break;
102	}
103	acp = buf + (cc / sizeof (buf[0])) - 1;
104	for (; acp >= buf; acp--) {
105	register char *cp;
106	time_t x;
107
108	if (acp->ac_comm[0] == '\0')
109	(void)strcpy(acp->ac_comm, "?");
110	for (cp = &acp->ac_comm[0];
111	cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
112	cp++)
113	if (!isascii(cp) \|\| iscntrl(cp))
114	*cp = '?';
115	if (*argv && !ok(argv, acp))
116	continue;
117	x = expand(acp->ac_utime) + expand(acp->ac_stime);
118	printf("%-.s %s %-s %-s %6.2f secs %.16s\n",
119	fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
120	acp->ac_comm, flagbits(acp->ac_flag),
121	UT_NAMESIZE, user_from_uid(acp->ac_uid, 0),
122	UT_LINESIZE, getdev(acp->ac_tty),
123	x / (double)AHZ, ctime(&acp->ac_btime));
124	}
125	}
126	}
127
128	time_t
129	expand (t)
130	unsigned t;
131	{
132	register time_t nt;
133
134	nt = t & 017777;
135	t >>= 13;
136	while (t) {
137	t--;
138	nt <<= 3;
139	}
140	return (nt);
141	}
142
143	char *
144	flagbits(f)
145	register int f;
146	{
147	static char flags[20];
148	char p, strcpy();
149
150	#define BIT(flag, ch) if (f & flag) *p++ = ch;
151	p = strcpy(flags, "- ");
152	BIT(ASU, 'S');
153	BIT(AFORK, 'F');
154	BIT(ACOMPAT, 'C');
155	BIT(ACORE, 'D');
156	BIT(AXSIG, 'X');
157	return (flags);
158	}
159
160	ok(argv, acp)
161	register char *argv[];
162	register struct acct *acp;
163	{
164	register char *cp;
165	char *user_from_uid();
166
167	do {
168	cp = user_from_uid(acp->ac_uid, 0);
169	if (!strcmp(cp, *argv))
170	return(1);
171	if ((cp = getdev(acp->ac_tty)) && !strcmp(cp, *argv))
172	return(1);
173	if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
174	return(1);
175	} while (*++argv);
176	return(0);
177	}
178
179	#include <sys/dir.h>
180
181	#define N_DEVS 43 /* hash value for device names */
182	#define NDEVS 500 /* max number of file names in /dev */
183
184	struct devhash {
185	dev_t dev_dev;
186	char dev_name [UT_LINESIZE + 1];
187	struct devhash * dev_nxt;
188	};
189	struct devhash *dev_hash[N_DEVS];
190	struct devhash *dev_chain;
191	#define HASH(d) (((int) d) % N_DEVS)
192
193	setupdevs()
194	{
195	register DIR * fd;
196	register struct devhash * hashtab;
197	register ndevs = NDEVS;
198	struct direct * dp;
199	char *malloc();
200
201	/NOSTRICT/
202	hashtab = (struct devhash )malloc(NDEVS sizeof(struct devhash));
203	if (hashtab == (struct devhash *)0) {
204	fputs("No mem for dev table\n", stderr);
205	return;
206	}
207	if ((fd = opendir(_PATH_DEV)) == NULL) {
208	perror(_PATH_DEV);
209	return;
210	}
211	while (dp = readdir(fd)) {
212	if (dp->d_ino == 0)
213	continue;
78ed81a3	214	if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console")
78ed81a3	215	&& strcmp(dp->d_name, "vga"))
15637ed4 RG	216	continue;
	217	(void)strncpy(hashtab->dev_name, dp->d_name, UT_LINESIZE);
	218	hashtab->dev_name[UT_LINESIZE] = 0;
	219	hashtab->dev_nxt = dev_chain;
	220	dev_chain = hashtab;
	221	hashtab++;
	222	if (--ndevs <= 0)
	223	break;
	224	}
	225	closedir(fd);
	226	}
	227
	228	char *
	229	getdev(dev)
	230	dev_t dev;
	231	{
	232	register struct devhash hp, nhp;
	233	struct stat statb;
	234	char name[fldsiz(devhash, dev_name) + 6];
	235	static dev_t lastdev = (dev_t) -1;
	236	static char *lastname;
	237	static int init = 0;
	238	char strcpy(), strcat();
	239
	240	if (dev == NODEV)
	241	return ("__");
	242	if (dev == lastdev)
	243	return (lastname);
	244	if (!init) {
	245	setupdevs();
	246	init++;
	247	}
	248	for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
	249	if (hp->dev_dev == dev) {
	250	lastdev = dev;
	251	return (lastname = hp->dev_name);
	252	}
	253	for (hp = dev_chain; hp; hp = nhp) {
	254	nhp = hp->dev_nxt;
	255	(void)strcpy(name, _PATH_DEV);
	256	strcat(name, hp->dev_name);
	257	if (stat(name, &statb) < 0) /* name truncated usually */
	258	continue;
	259	if ((statb.st_mode & S_IFMT) != S_IFCHR)
	260	continue;
	261	hp->dev_dev = statb.st_rdev;
	262	hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
	263	dev_hash[HASH(hp->dev_dev)] = hp;
	264	if (hp->dev_dev == dev) {
	265	dev_chain = nhp;
	266	lastdev = dev;
	267	return (lastname = hp->dev_name);
	268	}
	269	}
	270	dev_chain = (struct devhash *) 0;
	271	return ("??");
	272	}