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

#ifndef lint
static char *sccsid = "@(#)lastcomm.c	4.8 (Berkeley) %G%";
#endif

/*
 * 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) - 1; bn >= 0; bn--) {
		lseek(fd, bn * DEV_BSIZE, 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 =
			    expand(acp->ac_utime) + expand(acp->ac_stime);

			acp->ac_comm[10] = '\0';
			if (*acp->ac_comm == '\0')
				strcpy(acp->ac_comm, "?");
			for (cp = acp->ac_comm; *cp; cp++)
				if (iscntrl(*cp))
					*cp = '?';
			if (!ok(argc, argv, acp) && argc != 1)
				continue;
			printf("%-*s %s %-*s %-*s %4d sec%s %.16s\n",
				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, x > 1 || x == 0 ? "s" : " ",
				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]) &&
		    strcmp(acp->ac_comm, argv[j]))
			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");
		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;
	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
7f055d32	1	#ifndef lint
93b9cc72	2	static char *sccsid = "@(#)lastcomm.c 4.8 (Berkeley) %G%";
7f055d32	3	#endif
c7eeef87 BJ	4
	5	/*
	6	* last command
	7	*/
7f055d32 SL	8	#include <sys/param.h>
7f055d32 SL	9	#include <sys/acct.h>
cb88b4d5 SL	10	#include <sys/file.h>
	11
	12	#include <stdio.h>
7f055d32	13	#include <pwd.h>
40d69e19	14	#include <sys/stat.h>
7f055d32 SL	15	#include <utmp.h>
	16	#include <struct.h>
	17	#include <ctype.h>
	18
cb88b4d5	19	struct acct buf[DEV_BSIZE / sizeof (struct acct)];
c7eeef87	20
cb88b4d5	21	time_t expand();
7f055d32	22	char *flagbits();
cb88b4d5 SL	23	char *getname();
cb88b4d5 SL	24	char *getdev();
c7eeef87	25
7f055d32 SL	26	main(argc, argv)
7f055d32 SL	27	char *argv[];
c7eeef87	28	{
cb88b4d5	29	register int bn, cc;
7f055d32	30	register struct acct *acp;
cb88b4d5 SL	31	int fd;
cb88b4d5 SL	32	struct stat sb;
c7eeef87	33
cb88b4d5 SL	34	fd = open("/usr/adm/acct", O_RDONLY);
cb88b4d5 SL	35	if (fd < 0) {
7f055d32 SL	36	perror("/usr/adm/acct");
7f055d32 SL	37	exit(1);
c7eeef87	38	}
cb88b4d5 SL	39	fstat(fd, &sb);
	40	for (bn = btodb(sb.st_size) - 1; bn >= 0; bn--) {
	41	lseek(fd, bn * DEV_BSIZE, L_SET);
	42	cc = read(fd, buf, DEV_BSIZE);
	43	if (cc < 0) {
	44	perror("read");
	45	break;
	46	}
	47	acp = buf + (cc / sizeof (buf[0])) - 1;
	48	for (; acp >= buf; acp--) {
	49	register char *cp;
	50	time_t x =
	51	expand(acp->ac_utime) + expand(acp->ac_stime);
	52
7f055d32 SL	53	acp->ac_comm[10] = '\0';
	54	if (*acp->ac_comm == '\0')
	55	strcpy(acp->ac_comm, "?");
cb88b4d5 SL	56	for (cp = acp->ac_comm; *cp; cp++)
	57	if (iscntrl(*cp))
	58	*cp = '?';
7f055d32 SL	59	if (!ok(argc, argv, acp) && argc != 1)
	60	continue;
	61	printf("%-s %s %-s %-*s %4d sec%s %.16s\n",
	62	fldsiz(acct, ac_comm), acp->ac_comm,
	63	flagbits(acp->ac_flag),
cb88b4d5 SL	64	fldsiz(utmp, ut_name), getname(acp->ac_uid),
cb88b4d5 SL	65	fldsiz(utmp, ut_line), getdev(acp->ac_tty),
7f055d32 SL	66	x, x > 1 \|\| x == 0 ? "s" : " ",
7f055d32 SL	67	ctime(&acp->ac_btime));
c7eeef87 BJ	68	}
	69	}
	70	}
	71
	72	time_t
	73	expand (t)
7f055d32	74	unsigned t;
c7eeef87 BJ	75	{
	76	register time_t nt;
	77
	78	nt = t & 017777;
	79	t >>= 13;
7f055d32	80	while (t) {
c7eeef87 BJ	81	t--;
	82	nt <<= 3;
	83	}
	84	return (nt);
	85	}
	86
583da166 RE	87	char *
583da166 RE	88	flagbits(f)
7f055d32	89	register int f;
c7eeef87	90	{
583da166 RE	91	register int i = 0;
	92	static char flags[20];
	93
7f055d32 SL	94	#define BIT(flag, ch) flags[i++] = (f & flag) ? ch : ' '
	95	BIT(ASU, 'S');
	96	BIT(AFORK, 'F');
	97	BIT(ACOMPAT, 'C');
	98	BIT(ACORE, 'D');
	99	BIT(AXSIG, 'X');
583da166	100	flags[i] = '\0';
7f055d32	101	return (flags);
583da166 RE	102	}
583da166 RE	103
cb88b4d5 SL	104	ok(argc, argv, acp)
	105	register int argc;
	106	register char *argv[];
	107	register struct acct *acp;
	108	{
	109	register int j;
	110
	111	for (j = 1; j < argc; j++)
	112	if (strcmp(getname(acp->ac_uid), argv[j]) &&
	113	strcmp(getdev(acp->ac_tty), argv[j]) &&
	114	strcmp(acp->ac_comm, argv[j]))
	115	break;
	116	return (j == argc);
	117	}
	118
	119	/* should be done with nameserver or database */
	120
	121	struct utmp utmp;
	122
	123	#define NUID 2048
	124	#define NMAX (sizeof (utmp.ut_name))
	125
	126	char names[NUID][NMAX+1];
	127	char outrangename[NMAX+1];
	128	int outrangeuid = -1;
	129
	130	char *
	131	getname(uid)
	132	{
	133	register struct passwd *pw;
	134	static init;
	135	struct passwd *getpwent();
	136
	137	if (uid >= 0 && uid < NUID && names[uid][0])
	138	return (&names[uid][0]);
	139	if (uid >= 0 && uid == outrangeuid)
	140	return (outrangename);
	141	if (init == 2) {
	142	if (uid < NUID)
	143	return (0);
	144	setpwent();
	145	while (pw = getpwent()) {
	146	if (pw->pw_uid != uid)
	147	continue;
	148	outrangeuid = pw->pw_uid;
93b9cc72	149	strncpy(outrangename, pw->pw_name, NMAX);
cb88b4d5 SL	150	endpwent();
	151	return (outrangename);
	152	}
	153	endpwent();
	154	return (0);
	155	}
	156	if (init == 0)
	157	setpwent(), init = 1;
	158	while (pw = getpwent()) {
	159	if (pw->pw_uid < 0 \|\| pw->pw_uid >= NUID) {
	160	if (pw->pw_uid == uid) {
	161	outrangeuid = pw->pw_uid;
93b9cc72	162	strncpy(outrangename, pw->pw_name, NMAX);
cb88b4d5 SL	163	return (outrangename);
	164	}
	165	continue;
	166	}
	167	if (names[pw->pw_uid][0])
	168	continue;
	169	strncpy(names[pw->pw_uid], pw->pw_name, NMAX);
	170	if (pw->pw_uid == uid)
	171	return (&names[uid][0]);
	172	}
	173	init = 2;
	174	endpwent();
	175	return (0);
	176	}
	177
	178	#include <sys/dir.h>
	179
	180	#define N_DEVS 43 /* hash value for device names */
	181	#define NDEVS 500 /* max number of file names in /dev */
	182
	183	struct devhash {
	184	dev_t dev_dev;
	185	char dev_name [fldsiz(utmp, ut_line) + 1];
	186	struct devhash * dev_nxt;
	187	};
	188	struct devhash *dev_hash[N_DEVS];
	189	struct devhash *dev_chain;
	190	#define HASH(d) (((int) d) % N_DEVS)
	191
583da166 RE	192	setupdevs()
	193	{
	194	register DIR * fd;
	195	register struct devhash * hashtab;
	196	register ndevs = NDEVS;
	197	struct direct * dp;
	198
	199	if ((fd = opendir("/dev")) == NULL) {
	200	perror("/dev");
	201	return;
	202	}
cb88b4d5 SL	203	hashtab = (struct devhash )malloc(NDEVS sizeof(struct devhash));
cb88b4d5 SL	204	if (hashtab == (struct devhash *)0) {
583da166 RE	205	fprintf(stderr, "No mem for dev table\n");
	206	return;
	207	}
583da166 RE	208	while (dp = readdir(fd)) {
	209	if (dp->d_ino == 0)
	210	continue;
583da166 RE	211	if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console"))
583da166 RE	212	continue;
583da166 RE	213	strncpy(hashtab->dev_name, dp->d_name, fldsiz(utmp, ut_line));
	214	hashtab->dev_name[fldsiz(utmp, ut_line)] = 0;
	215	hashtab->dev_nxt = dev_chain;
	216	dev_chain = hashtab;
	217	hashtab++;
	218	if (--ndevs <= 0)
	219	break;
	220	}
	221	closedir(fd);
	222	}
	223
	224	char *
cb88b4d5	225	getdev(dev)
7f055d32	226	dev_t dev;
583da166 RE	227	{
	228	register struct devhash hp, nhp;
	229	struct stat statb;
7f055d32	230	char name[fldsiz(devhash, dev_name) + 6];
583da166 RE	231	static dev_t lastdev = (dev_t) -1;
583da166 RE	232	static char *lastname;
cb88b4d5	233	int init = 0;
583da166 RE	234
583da166 RE	235	if (dev == NODEV)
7f055d32	236	return ("__");
583da166	237	if (dev == lastdev)
7f055d32	238	return (lastname);
cb88b4d5 SL	239	if (!init) {
	240	setupdevs();
	241	init++;
	242	}
583da166 RE	243	for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
	244	if (hp->dev_dev == dev) {
	245	lastdev = dev;
7f055d32	246	return (lastname = hp->dev_name);
583da166	247	}
583da166 RE	248	for (hp = dev_chain; hp; hp = nhp) {
	249	nhp = hp->dev_nxt;
	250	strcpy(name, "/dev/");
	251	strcat(name, hp->dev_name);
	252	if (stat(name, &statb) < 0) /* name truncated usually */
	253	continue;
	254	if ((statb.st_mode & S_IFMT) != S_IFCHR)
	255	continue;
	256	hp->dev_dev = statb.st_rdev;
	257	hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
	258	dev_hash[HASH(hp->dev_dev)] = hp;
	259	if (hp->dev_dev == dev) {
	260	dev_chain = nhp;
	261	lastdev = dev;
7f055d32	262	return (lastname = hp->dev_name);
583da166	263	}
c7eeef87	264	}
583da166	265	dev_chain = (struct devhash *) 0;
7f055d32 SL	266	return ("??");
7f055d32 SL	267	}