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

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#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	5.2 (Berkeley) %G%";
#endif not lint

/*
 * last command
 */
#include <sys/param.h>
#include <sys/acct.h>
#include <sys/file.h>

#include <stdio.h>
#include <pwd.h>
#include <sys/stat.h>
#include <utmp.h>
#include <struct.h>
#include <ctype.h>

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

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

main(argc, argv)
	char *argv[];
{
	register int bn, cc;
	register struct acct *acp;
	int fd;
	struct stat sb;

	fd = open("/usr/adm/acct", O_RDONLY);
	if (fd < 0) {
		perror("/usr/adm/acct");
		exit(1);
	}
	fstat(fd, &sb);
	for (bn = btodb(sb.st_size); bn >= 0; bn--) {
		lseek(fd, 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')
				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 (argc > 1 && !ok(argc, 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),
				fldsiz(utmp, ut_name), getname(acp->ac_uid),
				fldsiz(utmp, ut_line), 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;
{
	register int i = 0;
	static char flags[20];

#define BIT(flag, ch)	flags[i++] = (f & flag) ? ch : ' '
	BIT(ASU, 'S');
	BIT(AFORK, 'F');
	BIT(ACOMPAT, 'C');
	BIT(ACORE, 'D');
	BIT(AXSIG, 'X');
	flags[i] = '\0';
	return (flags);
}

ok(argc, argv, acp)
	register int argc;
	register char *argv[];
	register struct acct *acp;
{
	register int j;

	for (j = 1; j < argc; j++)
		if (strcmp(getname(acp->ac_uid), argv[j]) &&
		    strcmp(getdev(acp->ac_tty), argv[j]) &&
		    strncmp(acp->ac_comm, argv[j], fldsiz(acct, ac_comm)))
			break;
	return (j == argc);
}

/* should be done with nameserver or database */

struct	utmp utmp;

#define NUID	2048
#define	NMAX	(sizeof (utmp.ut_name))

char	names[NUID][NMAX+1];
char	outrangename[NMAX+1];
int	outrangeuid = -1;

char *
getname(uid)
{
	register struct passwd *pw;
	static init;
	struct passwd *getpwent();

	if (uid >= 0 && uid < NUID && names[uid][0])
		return (&names[uid][0]);
	if (uid >= 0 && uid == outrangeuid)
		return (outrangename);
	if (init == 2) {
		if (uid < NUID)
			return (0);
		setpwent();
		while (pw = getpwent()) {
			if (pw->pw_uid != uid)
				continue;
			outrangeuid = pw->pw_uid;
			strncpy(outrangename, pw->pw_name, NMAX);
			endpwent();
			return (outrangename);
		}
		endpwent();
		return (0);
	}
	if (init == 0)
		setpwent(), init = 1;
	while (pw = getpwent()) {
		if (pw->pw_uid < 0 || pw->pw_uid >= NUID) {
			if (pw->pw_uid == uid) {
				outrangeuid = pw->pw_uid;
				strncpy(outrangename, pw->pw_name, NMAX);
				return (outrangename);
			}
			continue;
		}
		if (names[pw->pw_uid][0])
			continue;
		strncpy(names[pw->pw_uid], pw->pw_name, NMAX);
		if (pw->pw_uid == uid)
			return (&names[uid][0]);
	}
	init = 2;
	endpwent();
	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 [fldsiz(utmp, ut_line) + 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;

	if ((fd = opendir("/dev")) == NULL) {
		perror("/dev");
		return;
	}
	hashtab = (struct devhash *)malloc(NDEVS * sizeof(struct devhash));
	if (hashtab == (struct devhash *)0) {
		fprintf(stderr, "No mem for dev table\n");
		closedir(fd);
		return;
	}
	while (dp = readdir(fd)) {
		if (dp->d_ino == 0)
			continue;
		if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console"))
			continue;
		strncpy(hashtab->dev_name, dp->d_name, fldsiz(utmp, ut_line));
		hashtab->dev_name[fldsiz(utmp, ut_line)] = 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;

	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;
		strcpy(name, "/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
22e155fc DF	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
	7	#ifndef lint
	8	char copyright[] =
	9	"@(#) Copyright (c) 1980 Regents of the University of California.\n\
	10	All rights reserved.\n";
	11	#endif not lint
	12
7f055d32	13	#ifndef lint
4bf06df2	14	static char sccsid[] = "@(#)lastcomm.c 5.2 (Berkeley) %G%";
22e155fc	15	#endif not lint
c7eeef87 BJ	16
	17	/*
	18	* last command
	19	*/
7f055d32 SL	20	#include <sys/param.h>
7f055d32 SL	21	#include <sys/acct.h>
cb88b4d5 SL	22	#include <sys/file.h>
	23
	24	#include <stdio.h>
7f055d32	25	#include <pwd.h>
40d69e19	26	#include <sys/stat.h>
7f055d32 SL	27	#include <utmp.h>
	28	#include <struct.h>
	29	#include <ctype.h>
	30
cb88b4d5	31	struct acct buf[DEV_BSIZE / sizeof (struct acct)];
c7eeef87	32
cb88b4d5	33	time_t expand();
7f055d32	34	char *flagbits();
cb88b4d5 SL	35	char *getname();
cb88b4d5 SL	36	char *getdev();
c7eeef87	37
7f055d32 SL	38	main(argc, argv)
7f055d32 SL	39	char *argv[];
c7eeef87	40	{
cb88b4d5	41	register int bn, cc;
7f055d32	42	register struct acct *acp;
cb88b4d5 SL	43	int fd;
cb88b4d5 SL	44	struct stat sb;
c7eeef87	45
cb88b4d5 SL	46	fd = open("/usr/adm/acct", O_RDONLY);
cb88b4d5 SL	47	if (fd < 0) {
7f055d32 SL	48	perror("/usr/adm/acct");
7f055d32 SL	49	exit(1);
c7eeef87	50	}
cb88b4d5	51	fstat(fd, &sb);
3b26b9c3 RC	52	for (bn = btodb(sb.st_size); bn >= 0; bn--) {
3b26b9c3 RC	53	lseek(fd, dbtob(bn), L_SET);
cb88b4d5 SL	54	cc = read(fd, buf, DEV_BSIZE);
	55	if (cc < 0) {
	56	perror("read");
	57	break;
	58	}
	59	acp = buf + (cc / sizeof (buf[0])) - 1;
	60	for (; acp >= buf; acp--) {
	61	register char *cp;
8dc8d395	62	time_t x;
cb88b4d5	63
a4e47cfd	64	if (acp->ac_comm[0] == '\0')
7f055d32	65	strcpy(acp->ac_comm, "?");
a4e47cfd RC	66	for (cp = &acp->ac_comm[0];
	67	cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
	68	cp++)
	69	if (!isascii(cp) \|\| iscntrl(cp))
cb88b4d5	70	*cp = '?';
8dc8d395	71	if (argc > 1 && !ok(argc, argv, acp))
7f055d32	72	continue;
8dc8d395	73	x = expand(acp->ac_utime) + expand(acp->ac_stime);
4bf06df2 JL	74	printf("%-.s %s %-s %-s %6.2f secs %.16s\n",
	75	fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
	76	acp->ac_comm,
7f055d32	77	flagbits(acp->ac_flag),
cb88b4d5 SL	78	fldsiz(utmp, ut_name), getname(acp->ac_uid),
cb88b4d5 SL	79	fldsiz(utmp, ut_line), getdev(acp->ac_tty),
891ad5df	80	x / (double)AHZ, ctime(&acp->ac_btime));
c7eeef87 BJ	81	}
	82	}
	83	}
	84
	85	time_t
	86	expand (t)
7f055d32	87	unsigned t;
c7eeef87 BJ	88	{
	89	register time_t nt;
	90
	91	nt = t & 017777;
	92	t >>= 13;
7f055d32	93	while (t) {
c7eeef87 BJ	94	t--;
	95	nt <<= 3;
	96	}
	97	return (nt);
	98	}
	99
583da166 RE	100	char *
583da166 RE	101	flagbits(f)
7f055d32	102	register int f;
c7eeef87	103	{
583da166 RE	104	register int i = 0;
	105	static char flags[20];
	106
7f055d32 SL	107	#define BIT(flag, ch) flags[i++] = (f & flag) ? ch : ' '
	108	BIT(ASU, 'S');
	109	BIT(AFORK, 'F');
	110	BIT(ACOMPAT, 'C');
	111	BIT(ACORE, 'D');
	112	BIT(AXSIG, 'X');
583da166	113	flags[i] = '\0';
7f055d32	114	return (flags);
583da166 RE	115	}
583da166 RE	116
cb88b4d5 SL	117	ok(argc, argv, acp)
	118	register int argc;
	119	register char *argv[];
	120	register struct acct *acp;
	121	{
	122	register int j;
	123
	124	for (j = 1; j < argc; j++)
	125	if (strcmp(getname(acp->ac_uid), argv[j]) &&
	126	strcmp(getdev(acp->ac_tty), argv[j]) &&
a4e47cfd	127	strncmp(acp->ac_comm, argv[j], fldsiz(acct, ac_comm)))
cb88b4d5 SL	128	break;
	129	return (j == argc);
	130	}
	131
	132	/* should be done with nameserver or database */
	133
	134	struct utmp utmp;
	135
	136	#define NUID 2048
	137	#define NMAX (sizeof (utmp.ut_name))
	138
	139	char names[NUID][NMAX+1];
	140	char outrangename[NMAX+1];
	141	int outrangeuid = -1;
	142
	143	char *
	144	getname(uid)
	145	{
	146	register struct passwd *pw;
	147	static init;
	148	struct passwd *getpwent();
	149
	150	if (uid >= 0 && uid < NUID && names[uid][0])
	151	return (&names[uid][0]);
	152	if (uid >= 0 && uid == outrangeuid)
	153	return (outrangename);
	154	if (init == 2) {
	155	if (uid < NUID)
	156	return (0);
	157	setpwent();
	158	while (pw = getpwent()) {
	159	if (pw->pw_uid != uid)
	160	continue;
	161	outrangeuid = pw->pw_uid;
93b9cc72	162	strncpy(outrangename, pw->pw_name, NMAX);
cb88b4d5 SL	163	endpwent();
	164	return (outrangename);
	165	}
	166	endpwent();
	167	return (0);
	168	}
	169	if (init == 0)
	170	setpwent(), init = 1;
	171	while (pw = getpwent()) {
	172	if (pw->pw_uid < 0 \|\| pw->pw_uid >= NUID) {
	173	if (pw->pw_uid == uid) {
	174	outrangeuid = pw->pw_uid;
93b9cc72	175	strncpy(outrangename, pw->pw_name, NMAX);
cb88b4d5 SL	176	return (outrangename);
	177	}
	178	continue;
	179	}
	180	if (names[pw->pw_uid][0])
	181	continue;
	182	strncpy(names[pw->pw_uid], pw->pw_name, NMAX);
	183	if (pw->pw_uid == uid)
	184	return (&names[uid][0]);
	185	}
	186	init = 2;
	187	endpwent();
	188	return (0);
	189	}
	190
	191	#include <sys/dir.h>
	192
	193	#define N_DEVS 43 /* hash value for device names */
	194	#define NDEVS 500 /* max number of file names in /dev */
	195
	196	struct devhash {
	197	dev_t dev_dev;
	198	char dev_name [fldsiz(utmp, ut_line) + 1];
	199	struct devhash * dev_nxt;
	200	};
	201	struct devhash *dev_hash[N_DEVS];
	202	struct devhash *dev_chain;
	203	#define HASH(d) (((int) d) % N_DEVS)
	204
583da166 RE	205	setupdevs()
	206	{
	207	register DIR * fd;
	208	register struct devhash * hashtab;
	209	register ndevs = NDEVS;
	210	struct direct * dp;
	211
	212	if ((fd = opendir("/dev")) == NULL) {
	213	perror("/dev");
	214	return;
	215	}
cb88b4d5 SL	216	hashtab = (struct devhash )malloc(NDEVS sizeof(struct devhash));
cb88b4d5 SL	217	if (hashtab == (struct devhash *)0) {
583da166	218	fprintf(stderr, "No mem for dev table\n");
f4e5f824	219	closedir(fd);
583da166 RE	220	return;
583da166 RE	221	}
583da166 RE	222	while (dp = readdir(fd)) {
	223	if (dp->d_ino == 0)
	224	continue;
583da166 RE	225	if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console"))
583da166 RE	226	continue;
583da166 RE	227	strncpy(hashtab->dev_name, dp->d_name, fldsiz(utmp, ut_line));
	228	hashtab->dev_name[fldsiz(utmp, ut_line)] = 0;
	229	hashtab->dev_nxt = dev_chain;
	230	dev_chain = hashtab;
	231	hashtab++;
	232	if (--ndevs <= 0)
	233	break;
	234	}
	235	closedir(fd);
	236	}
	237
	238	char *
cb88b4d5	239	getdev(dev)
7f055d32	240	dev_t dev;
583da166 RE	241	{
	242	register struct devhash hp, nhp;
	243	struct stat statb;
7f055d32	244	char name[fldsiz(devhash, dev_name) + 6];
583da166 RE	245	static dev_t lastdev = (dev_t) -1;
583da166 RE	246	static char *lastname;
f4e5f824	247	static int init = 0;
583da166 RE	248
583da166 RE	249	if (dev == NODEV)
7f055d32	250	return ("__");
583da166	251	if (dev == lastdev)
7f055d32	252	return (lastname);
cb88b4d5 SL	253	if (!init) {
	254	setupdevs();
	255	init++;
	256	}
583da166 RE	257	for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
	258	if (hp->dev_dev == dev) {
	259	lastdev = dev;
7f055d32	260	return (lastname = hp->dev_name);
583da166	261	}
583da166 RE	262	for (hp = dev_chain; hp; hp = nhp) {
	263	nhp = hp->dev_nxt;
	264	strcpy(name, "/dev/");
	265	strcat(name, hp->dev_name);
	266	if (stat(name, &statb) < 0) /* name truncated usually */
	267	continue;
	268	if ((statb.st_mode & S_IFMT) != S_IFCHR)
	269	continue;
	270	hp->dev_dev = statb.st_rdev;
	271	hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
	272	dev_hash[HASH(hp->dev_dev)] = hp;
	273	if (hp->dev_dev == dev) {
	274	dev_chain = nhp;
	275	lastdev = dev;
7f055d32	276	return (lastname = hp->dev_name);
583da166	277	}
c7eeef87	278	}
583da166	279	dev_chain = (struct devhash *) 0;
7f055d32 SL	280	return ("??");
7f055d32 SL	281	}