[unix-history] / usr / src / usr.bin / login / login.c.1

static	char *sccsid = "@(#)login.c.1	4.20 82/12/21";
/*
 * login [ name ]
 * login -r
 */

#include <sys/types.h>
#include <sgtty.h>
#include <utmp.h>
#include <signal.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <lastlog.h>

#define	SCPYN(a, b)	strncpy(a, b, sizeof(a))

#define NMAX	sizeof(utmp.ut_name)
#define LMAX	sizeof(utmp.ut_line)

#define	FALSE	0
#define	TRUE	-1

char	nolog[] =	"/etc/nologin";
char	qlog[]  =	".hushlogin";
char	securetty[] =	"/etc/securetty";
char	maildir[30] =	"/usr/spool/mail/";
char	lastlog[] =	"/usr/adm/lastlog";
struct	passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };
struct	sgttyb ttyb;
struct	utmp utmp;
char	minusnam[16] = "-";

char	homedir[64] = "HOME=";
char	shell[64] = "SHELL=";
char	term[64] = "TERM=";
char	user[20] = "USER=";
char	*speeds[] =
    { "0", "50", "75", "110", "134", "150", "200", "300",
      "600", "1200", "1800", "2400", "4800", "9600", "19200", "38400" };
#define	NSPEEDS	(sizeof (speeds) / sizeof (speeds[0]))

char	*envinit[] =
    {homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0};

struct	passwd *pwd;
struct	passwd *getpwnam();
char	*strcat(), *rindex(), *index();
int	setpwent();
char	*ttyname();
char	*crypt();
char	*getpass();
char	*rindex();
char	*stypeof();
extern	char **environ;

struct	ttychars tc = {
	CERASE,	CKILL,	CINTR,	CQUIT,	CSTART,
	CSTOP,	CEOF,	CBRK,	CSUSP,	CDSUSP,
	CRPRNT,	CFLUSH,	CWERASE,CLNEXT
};

int	rflag;
char	rusername[NMAX+1], lusername[NMAX+1];
char	rpassword[NMAX+1];
char	name[NMAX+1];
char	*rhost;

main(argc, argv)
char **argv;
{
	register char *namep;
	int t, f, c;
	int invalid;
	int quietlog;
	int i;
	FILE *nlfd;
	char *ttyn;
	int ldisc = 0, zero = 0;
	FILE *hostf; int first = 1;

	alarm(60);
	signal(SIGQUIT, SIG_IGN);
	signal(SIGINT, SIG_IGN);
	nice(-100);
	nice(20);
	nice(0);
	if (argc > 1 && !strcmp(argv[1], "-r")) {
		rflag++;
		rhost = argv[2];
		argc = 1;
		getstr(rusername, sizeof (rusername), "remuser");
		getstr(lusername, sizeof (lusername), "locuser");
		getstr(term+5, sizeof(term)-5, "Terminal type");
		if (getuid())
			goto abnormal;
		setpwent();
		pwd = getpwnam(lusername);
		endpwent();
		if (pwd == NULL) {
			if (strcmp(rusername, lusername))
				printf("%s: No such user\r\n", lusername);
			goto abnormal;
		}
		hostf = pwd->pw_uid ? fopen("/etc/hosts.equiv", "r") : 0;
	again:
		if (hostf) {
		  char ahost[32];
		  while (fgets(ahost, sizeof (ahost), hostf)) {
			char *user;
			if (index(ahost, '\n'))
				*index(ahost, '\n') = 0;
			user = index(ahost, ' ');
			if (user)
				*user++ = 0;
			if (!strcmp(rhost, ahost) &&
			    !strcmp(rusername, user ? user : lusername)) {
				fclose(hostf);
				goto normal;
			}
		  }
		  fclose(hostf);
		}
		if (first == 1) {
			first = 0;
			if (chdir(pwd->pw_dir) < 0)
				goto again;
			hostf = fopen(".rhosts", "r");
			goto again;
		}
abnormal:
		rhost = 0;
		rflag = -1;
	}
normal:
	ioctl(0, TIOCLSET, &zero);	/* XXX */
	ioctl(0, TIOCNXCL, 0);
	ioctl(0, FIONBIO, &zero);
	ioctl(0, FIOASYNC, &zero);
	ioctl(0, TIOCGETP, &ttyb);	/* XXX */
	if (rflag) {
		char *cp = index(term, '/');
		if (cp) {
			int i;
			*cp++ = 0;
			for (i = 0; i < NSPEEDS; i++)
				if (!strcmp(speeds[i], cp)) {
					ttyb.sg_ispeed = ttyb.sg_ospeed = i;
					break;
				}
		}
		ttyb.sg_flags = ECHO|CRMOD|ANYP|XTABS;
	}
	ioctl(0, TIOCSETP, &ttyb);	/* XXX */
	ioctl(0, TIOCCSET, &tc);
	for (t=3; t<20; t++)
		close(t);
	ttyn = ttyname(0);
	if (ttyn==(char *)0)
		ttyn = "/dev/tty??";
	do {
		ldisc = 0;
		ioctl(0, TIOCSETD, &ldisc);
		invalid = FALSE;
		SCPYN(utmp.ut_name, "");
		if (argc>1) {
			SCPYN(utmp.ut_name, argv[1]);
			argc = 0;
		}
		if (rflag) {
			SCPYN(utmp.ut_name, lusername);
			if (rflag == -1)
				rflag = 0;
		} else
			while (utmp.ut_name[0] == '\0') {
				namep = utmp.ut_name;
				{ char hostname[32];
				  gethostname(hostname, sizeof (hostname));
				  printf("%s login: ", hostname); }
				while ((c = getchar()) != '\n') {
					if (c == ' ')
						c = '_';
					if (c == EOF)
						exit(0);
					if (namep < utmp.ut_name+NMAX)
						*namep++ = c;
				}
			}
		if (rhost == 0) {
			setpwent();
			if ((pwd = getpwnam(utmp.ut_name)) == NULL)
				pwd = &nouser;
			endpwent();
		}
		if (!strcmp(pwd->pw_shell, "/bin/csh")) {
			ldisc = NTTYDISC;
			ioctl(0, TIOCSETD, &ldisc);
		}
		if (rhost == 0) {
			if (*pwd->pw_passwd != '\0') {
				char *pp;
				nice(-4);
				if (rflag == 0)
					pp = getpass("Password:");
				else
					pp = rpassword;
				namep = crypt(pp,pwd->pw_passwd);
				nice(4);
				if (strcmp(namep, pwd->pw_passwd))
					invalid = TRUE;
			}
		}
		if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
			/* logins are disabled except for root */
			while ((c = getc(nlfd)) != EOF)
				putchar(c);
			fflush(stdout);
			sleep(5);
			exit(0);
		}
		if (!invalid && pwd->pw_uid == 0 &&
		    !rootterm(ttyn+sizeof("/dev/")-1)) {
			logerr("ROOT LOGIN REFUSED %s",
			    ttyn+sizeof("/dev/")-1);
			invalid = TRUE;
		}
		if (invalid) {
			printf("Login incorrect\n");
			if (ttyn[sizeof("/dev/tty")-1] == 'd')
				logerr("BADDIALUP %s %s\n",
				    ttyn+sizeof("/dev/")-1, utmp.ut_name);
		}
		if (*pwd->pw_shell == '\0')
			pwd->pw_shell = "/bin/sh";
		i = strlen(pwd->pw_shell);
		if (chdir(pwd->pw_dir) < 0 && !invalid ) {
			if (chdir("/") < 0) {
				printf("No directory!\n");
				invalid = TRUE;
			} else {
				printf("No directory!  Logging in with home=/\n");
				pwd->pw_dir = "/";
			}
		}
		if (rflag && invalid)
			exit(1);
	} while (invalid);


	time(&utmp.ut_time);
	t = ttyslot();
	if (t>0 && (f = open("/etc/utmp", 1)) >= 0) {
		lseek(f, (long)(t*sizeof(utmp)), 0);
		SCPYN(utmp.ut_line, rindex(ttyn, '/')+1);
		write(f, (char *)&utmp, sizeof(utmp));
		close(f);
	}
	if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
		lseek(f, 0L, 2);
		write(f, (char *)&utmp, sizeof(utmp));
		close(f);
	}
	quietlog = 0;
	if (access(qlog, 0) == 0)
		quietlog = 1;
	if ((f = open(lastlog, 2)) >= 0) {
		struct lastlog ll;

		lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
		if (read(f, (char *) &ll, sizeof ll) == sizeof ll &&
		    ll.ll_time != 0) {
			if (quietlog == 0)
			printf("Last login: %.*s on %.*s\n"
			    , 24-5
			    , (char *) ctime(&ll.ll_time)
			    , sizeof(ll.ll_line)
			    , ll.ll_line
			);
		}
		lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
		time(&ll.ll_time);
		SCPYN(ll.ll_line, rindex(ttyn, '/')+1);
		write(f, (char *) &ll, sizeof ll);
		close(f);
	}
	chown(ttyn, pwd->pw_uid, pwd->pw_gid);
	chmod(ttyn, 0622);
	setgid(pwd->pw_gid);
	strncpy(name, utmp.ut_name, NMAX);
	name[NMAX] = '\0';
	initgroups(name, pwd->pw_gid);
	setuid(pwd->pw_uid);
	environ = envinit;
	strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
	strncat(shell, pwd->pw_shell, sizeof(shell)-7);
	if (term[strlen("TERM=")] == 0)
		strncat(term, stypeof(ttyn), sizeof(term)-6);
	strncat(user, pwd->pw_name, sizeof(user)-6);
	if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
		namep = pwd->pw_shell;
	else
		namep++;
	strcat(minusnam, namep);
	alarm(0);
	umask(022);
	if (ttyn[sizeof("/dev/tty")-1] == 'd')
		logerr("DIALUP %s %s\n", ttyn+sizeof("/dev/")-1, pwd->pw_name);
	if (!quietlog) {
		showmotd();
		strcat(maildir, pwd->pw_name);
		if (access(maildir,4)==0) {
			struct stat statb;
			stat(maildir, &statb);
			if (statb.st_size)
				printf("You have mail.\n");
		}
	}
	
	signal(SIGQUIT, SIG_DFL);
	signal(SIGINT, SIG_DFL);
	signal(SIGTSTP, SIG_IGN);
	execlp(pwd->pw_shell, minusnam, 0);
	perror(pwd->pw_shell);
	printf("No shell\n");
	exit(0);
}

int	stopmotd;
catch()
{

	signal(SIGINT, SIG_IGN);
	stopmotd++;
}

rootterm(tty)
	char *tty;
{
	register FILE *fd;
	char buf[100];

	if (rflag)
		return(1);
	if ((fd = fopen(securetty, "r")) == NULL)
		return(1);
	while (fgets(buf, sizeof buf, fd) != NULL) {
		buf[strlen(buf)-1] = '\0';
		if (strcmp(tty, buf) == 0) {
			fclose(fd);
			return(1);
		}
	}
	fclose(fd);
	return(0);
}

showmotd()
{
	FILE *mf;
	register c;

	signal(SIGINT, catch);
	if ((mf = fopen("/etc/motd","r")) != NULL) {
		while ((c = getc(mf)) != EOF && stopmotd == 0)
			putchar(c);
		fclose(mf);
	}
	signal(SIGINT, SIG_IGN);
}

#undef	UNKNOWN
#define UNKNOWN "su"

char *
stypeof(ttyid)
char	*ttyid;
{
	static char	typebuf[16];
	char		buf[50];
	register FILE	*f;
	register char	*p, *t, *q;

	if (ttyid == NULL)
		return (UNKNOWN);
	f = fopen("/etc/ttytype", "r");
	if (f == NULL)
		return (UNKNOWN);
	/* split off end of name */
	for (p = q = ttyid; *p != 0; p++)
		if (*p == '/')
			q = p + 1;

	/* scan the file */
	while (fgets(buf, sizeof buf, f) != NULL)
	{
		for (t=buf; *t!=' ' && *t != '\t'; t++)
			;
		*t++ = 0;
		while (*t == ' ' || *t == '\t')
			t++;
		for (p=t; *p>' '; p++)
			;
		*p = 0;
		if (strcmp(q,t)==0) {
			strcpy(typebuf, buf);
			fclose(f);
			return (typebuf);
		}
	}
	fclose (f);
	return (UNKNOWN);
}

getstr(buf, cnt, err)
	char *buf;
	int cnt;
	char *err;
{
	char c;

	do {
		if (read(0, &c, 1) != 1)
			exit(1);
		if (--cnt < 0) {
			printf("%s too long\r\n", err);
			exit(1);
		}
		*buf++ = c;
	} while (c != 0);
}

logerr(fmt, a1, a2, a3)
	char *fmt, *a1, *a2, *a3;
{

}
Commit	Line	Data
3479a16a	1	static char *sccsid = "@(#)login.c.1 4.20 82/12/21";
88a01c09 BJ	2	/*
88a01c09 BJ	3	* login [ name ]
86eb6c9e	4	* login -r
88a01c09 BJ	5	*/
	6
	7	#include <sys/types.h>
	8	#include <sgtty.h>
	9	#include <utmp.h>
	10	#include <signal.h>
	11	#include <pwd.h>
	12	#include <stdio.h>
	13	#include <sys/stat.h>
	14	#include <lastlog.h>
f570e1ff BJ	15
f570e1ff BJ	16	#define SCPYN(a, b) strncpy(a, b, sizeof(a))
88a01c09	17
b4389814 BJ	18	#define NMAX sizeof(utmp.ut_name)
b4389814 BJ	19	#define LMAX sizeof(utmp.ut_line)
88a01c09	20
f570e1ff BJ	21	#define FALSE 0
	22	#define TRUE -1
	23
	24	char nolog[] = "/etc/nologin";
	25	char qlog[] = ".hushlogin";
	26	char securetty[] = "/etc/securetty";
88a01c09 BJ	27	char maildir[30] = "/usr/spool/mail/";
88a01c09 BJ	28	char lastlog[] = "/usr/adm/lastlog";
3479a16a	29	struct passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };
88a01c09 BJ	30	struct sgttyb ttyb;
	31	struct utmp utmp;
	32	char minusnam[16] = "-";
86eb6c9e	33
88a01c09 BJ	34	char homedir[64] = "HOME=";
	35	char shell[64] = "SHELL=";
	36	char term[64] = "TERM=";
f570e1ff	37	char user[20] = "USER=";
86eb6c9e BJ	38	char *speeds[] =
	39	{ "0", "50", "75", "110", "134", "150", "200", "300",
	40	"600", "1200", "1800", "2400", "4800", "9600", "19200", "38400" };
	41	#define NSPEEDS (sizeof (speeds) / sizeof (speeds[0]))
	42
	43	char *envinit[] =
	44	{homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0};
88a01c09	45
86eb6c9e	46	struct passwd *pwd;
88a01c09	47	struct passwd *getpwnam();
86eb6c9e	48	char strcat(), rindex(), *index();
88a01c09 BJ	49	int setpwent();
	50	char *ttyname();
	51	char *crypt();
	52	char *getpass();
	53	char *rindex();
	54	char *stypeof();
	55	extern char **environ;
	56
3479a16a SL	57	struct ttychars tc = {
	58	CERASE, CKILL, CINTR, CQUIT, CSTART,
	59	CSTOP, CEOF, CBRK, CSUSP, CDSUSP,
	60	CRPRNT, CFLUSH, CWERASE,CLNEXT
841d84b0 BJ	61	};
841d84b0 BJ	62
86eb6c9e	63	int rflag;
b4389814	64	char rusername[NMAX+1], lusername[NMAX+1];
86eb6c9e	65	char rpassword[NMAX+1];
e5321f7b	66	char name[NMAX+1];
b4389814	67	char *rhost;
86eb6c9e	68
88a01c09 BJ	69	main(argc, argv)
	70	char **argv;
	71	{
	72	register char *namep;
	73	int t, f, c;
f570e1ff BJ	74	int invalid;
	75	int quietlog;
	76	int i;
	77	FILE *nlfd;
88a01c09	78	char *ttyn;
b4389814 BJ	79	int ldisc = 0, zero = 0;
b4389814 BJ	80	FILE *hostf; int first = 1;
88a01c09 BJ	81
	82	alarm(60);
	83	signal(SIGQUIT, SIG_IGN);
	84	signal(SIGINT, SIG_IGN);
	85	nice(-100);
	86	nice(20);
	87	nice(0);
4f8d3876	88	if (argc > 1 && !strcmp(argv[1], "-r")) {
86eb6c9e	89	rflag++;
4f8d3876	90	rhost = argv[2];
b4389814	91	argc = 1;
4f8d3876 BJ	92	getstr(rusername, sizeof (rusername), "remuser");
4f8d3876 BJ	93	getstr(lusername, sizeof (lusername), "locuser");
86eb6c9e	94	getstr(term+5, sizeof(term)-5, "Terminal type");
4f8d3876 BJ	95	if (getuid())
4f8d3876 BJ	96	goto abnormal;
b4389814 BJ	97	setpwent();
b4389814 BJ	98	pwd = getpwnam(lusername);
4f8d3876	99	endpwent();
b4389814	100	if (pwd == NULL) {
4f8d3876 BJ	101	if (strcmp(rusername, lusername))
	102	printf("%s: No such user\r\n", lusername);
	103	goto abnormal;
b4389814	104	}
1886582e	105	hostf = pwd->pw_uid ? fopen("/etc/hosts.equiv", "r") : 0;
b4389814 BJ	106	again:
	107	if (hostf) {
	108	char ahost[32];
	109	while (fgets(ahost, sizeof (ahost), hostf)) {
	110	char *user;
	111	if (index(ahost, '\n'))
	112	*index(ahost, '\n') = 0;
	113	user = index(ahost, ' ');
	114	if (user)
	115	*user++ = 0;
	116	if (!strcmp(rhost, ahost) &&
4f8d3876 BJ	117	!strcmp(rusername, user ? user : lusername)) {
4f8d3876 BJ	118	fclose(hostf);
b4389814	119	goto normal;
4f8d3876	120	}
b4389814 BJ	121	}
	122	fclose(hostf);
	123	}
	124	if (first == 1) {
	125	first = 0;
	126	if (chdir(pwd->pw_dir) < 0)
	127	goto again;
	128	hostf = fopen(".rhosts", "r");
	129	goto again;
	130	}
4f8d3876	131	abnormal:
b4389814 BJ	132	rhost = 0;
b4389814 BJ	133	rflag = -1;
86eb6c9e	134	}
b4389814	135	normal:
3479a16a	136	ioctl(0, TIOCLSET, &zero); /* XXX */
c95ed2b2	137	ioctl(0, TIOCNXCL, 0);
4f8d3876 BJ	138	ioctl(0, FIONBIO, &zero);
4f8d3876 BJ	139	ioctl(0, FIOASYNC, &zero);
3479a16a	140	ioctl(0, TIOCGETP, &ttyb); /* XXX */
86eb6c9e BJ	141	if (rflag) {
	142	char *cp = index(term, '/');
	143	if (cp) {
	144	int i;
	145	*cp++ = 0;
	146	for (i = 0; i < NSPEEDS; i++)
	147	if (!strcmp(speeds[i], cp)) {
	148	ttyb.sg_ispeed = ttyb.sg_ospeed = i;
	149	break;
	150	}
	151	}
	152	ttyb.sg_flags = ECHO\|CRMOD\|ANYP\|XTABS;
	153	}
3479a16a SL	154	ioctl(0, TIOCSETP, &ttyb); /* XXX */
3479a16a SL	155	ioctl(0, TIOCCSET, &tc);
88a01c09 BJ	156	for (t=3; t<20; t++)
	157	close(t);
	158	ttyn = ttyname(0);
f570e1ff	159	if (ttyn==(char *)0)
88a01c09	160	ttyn = "/dev/tty??";
f570e1ff BJ	161	do {
f570e1ff BJ	162	ldisc = 0;
c95ed2b2	163	ioctl(0, TIOCSETD, &ldisc);
f570e1ff BJ	164	invalid = FALSE;
	165	SCPYN(utmp.ut_name, "");
	166	if (argc>1) {
	167	SCPYN(utmp.ut_name, argv[1]);
	168	argc = 0;
	169	}
4f8d3876	170	if (rflag) {
3479a16a	171	SCPYN(utmp.ut_name, lusername);
4f8d3876 BJ	172	if (rflag == -1)
	173	rflag = 0;
	174	} else
b4389814 BJ	175	while (utmp.ut_name[0] == '\0') {
	176	namep = utmp.ut_name;
	177	{ char hostname[32];
	178	gethostname(hostname, sizeof (hostname));
	179	printf("%s login: ", hostname); }
	180	while ((c = getchar()) != '\n') {
	181	if (c == ' ')
	182	c = '_';
	183	if (c == EOF)
	184	exit(0);
	185	if (namep < utmp.ut_name+NMAX)
	186	*namep++ = c;
	187	}
f570e1ff	188	}
b4389814 BJ	189	if (rhost == 0) {
	190	setpwent();
	191	if ((pwd = getpwnam(utmp.ut_name)) == NULL)
	192	pwd = &nouser;
	193	endpwent();
f570e1ff	194	}
f570e1ff BJ	195	if (!strcmp(pwd->pw_shell, "/bin/csh")) {
	196	ldisc = NTTYDISC;
	197	ioctl(0, TIOCSETD, &ldisc);
	198	}
b4389814 BJ	199	if (rhost == 0) {
	200	if (*pwd->pw_passwd != '\0') {
	201	char *pp;
	202	nice(-4);
	203	if (rflag == 0)
	204	pp = getpass("Password:");
	205	else
	206	pp = rpassword;
	207	namep = crypt(pp,pwd->pw_passwd);
	208	nice(4);
	209	if (strcmp(namep, pwd->pw_passwd))
	210	invalid = TRUE;
	211	}
f570e1ff BJ	212	}
	213	if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
	214	/* logins are disabled except for root */
	215	while ((c = getc(nlfd)) != EOF)
	216	putchar(c);
	217	fflush(stdout);
	218	sleep(5);
	219	exit(0);
	220	}
	221	if (!invalid && pwd->pw_uid == 0 &&
	222	!rootterm(ttyn+sizeof("/dev/")-1)) {
4f8d3876 BJ	223	logerr("ROOT LOGIN REFUSED %s",
4f8d3876 BJ	224	ttyn+sizeof("/dev/")-1);
f570e1ff BJ	225	invalid = TRUE;
	226	}
	227	if (invalid) {
88a01c09	228	printf("Login incorrect\n");
4f8d3876 BJ	229	if (ttyn[sizeof("/dev/tty")-1] == 'd')
	230	logerr("BADDIALUP %s %s\n",
	231	ttyn+sizeof("/dev/")-1, utmp.ut_name);
88a01c09	232	}
f570e1ff BJ	233	if (*pwd->pw_shell == '\0')
	234	pwd->pw_shell = "/bin/sh";
	235	i = strlen(pwd->pw_shell);
	236	if (chdir(pwd->pw_dir) < 0 && !invalid ) {
	237	if (chdir("/") < 0) {
	238	printf("No directory!\n");
	239	invalid = TRUE;
	240	} else {
	241	printf("No directory! Logging in with home=/\n");
	242	pwd->pw_dir = "/";
	243	}
88a01c09	244	}
86eb6c9e BJ	245	if (rflag && invalid)
86eb6c9e BJ	246	exit(1);
f570e1ff	247	} while (invalid);
88a01c09	248
86eb6c9e	249
88a01c09 BJ	250	time(&utmp.ut_time);
	251	t = ttyslot();
	252	if (t>0 && (f = open("/etc/utmp", 1)) >= 0) {
	253	lseek(f, (long)(t*sizeof(utmp)), 0);
	254	SCPYN(utmp.ut_line, rindex(ttyn, '/')+1);
	255	write(f, (char *)&utmp, sizeof(utmp));
	256	close(f);
	257	}
	258	if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
	259	lseek(f, 0L, 2);
	260	write(f, (char *)&utmp, sizeof(utmp));
	261	close(f);
	262	}
4f8d3876	263	quietlog = 0;
f570e1ff	264	if (access(qlog, 0) == 0)
4f8d3876 BJ	265	quietlog = 1;
4f8d3876 BJ	266	if ((f = open(lastlog, 2)) >= 0) {
f570e1ff BJ	267	struct lastlog ll;
	268
	269	lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
	270	if (read(f, (char *) &ll, sizeof ll) == sizeof ll &&
	271	ll.ll_time != 0) {
4f8d3876	272	if (quietlog == 0)
f570e1ff BJ	273	printf("Last login: %.s on %.s\n"
	274	, 24-5
	275	, (char *) ctime(&ll.ll_time)
	276	, sizeof(ll.ll_line)
	277	, ll.ll_line
	278	);
	279	}
	280	lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
	281	time(&ll.ll_time);
	282	SCPYN(ll.ll_line, rindex(ttyn, '/')+1);
	283	write(f, (char *) &ll, sizeof ll);
	284	close(f);
	285	}
88a01c09	286	chown(ttyn, pwd->pw_uid, pwd->pw_gid);
3479a16a	287	chmod(ttyn, 0622);
88a01c09	288	setgid(pwd->pw_gid);
e5321f7b KM	289	strncpy(name, utmp.ut_name, NMAX);
e5321f7b KM	290	name[NMAX] = '\0';
b1198826	291	initgroups(name, pwd->pw_gid);
88a01c09	292	setuid(pwd->pw_uid);
88a01c09 BJ	293	environ = envinit;
	294	strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
	295	strncat(shell, pwd->pw_shell, sizeof(shell)-7);
4f8d3876	296	if (term[strlen("TERM=")] == 0)
86eb6c9e	297	strncat(term, stypeof(ttyn), sizeof(term)-6);
f570e1ff	298	strncat(user, pwd->pw_name, sizeof(user)-6);
88a01c09 BJ	299	if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
	300	namep = pwd->pw_shell;
	301	else
	302	namep++;
	303	strcat(minusnam, namep);
	304	alarm(0);
b4389814	305	umask(022);
4f8d3876 BJ	306	if (ttyn[sizeof("/dev/tty")-1] == 'd')
	307	logerr("DIALUP %s %s\n", ttyn+sizeof("/dev/")-1, pwd->pw_name);
	308	if (!quietlog) {
f570e1ff BJ	309	showmotd();
	310	strcat(maildir, pwd->pw_name);
	311	if (access(maildir,4)==0) {
	312	struct stat statb;
	313	stat(maildir, &statb);
	314	if (statb.st_size)
	315	printf("You have mail.\n");
	316	}
	317	}
	318
88a01c09 BJ	319	signal(SIGQUIT, SIG_DFL);
88a01c09 BJ	320	signal(SIGINT, SIG_DFL);
5f87416f	321	signal(SIGTSTP, SIG_IGN);
88a01c09	322	execlp(pwd->pw_shell, minusnam, 0);
f570e1ff	323	perror(pwd->pw_shell);
88a01c09 BJ	324	printf("No shell\n");
	325	exit(0);
	326	}
	327
	328	int stopmotd;
	329	catch()
	330	{
1886582e	331
88a01c09 BJ	332	signal(SIGINT, SIG_IGN);
	333	stopmotd++;
	334	}
	335
f570e1ff	336	rootterm(tty)
1886582e	337	char *tty;
f570e1ff BJ	338	{
f570e1ff BJ	339	register FILE *fd;
1886582e	340	char buf[100];
f570e1ff	341
1886582e BJ	342	if (rflag)
1886582e BJ	343	return(1);
f570e1ff BJ	344	if ((fd = fopen(securetty, "r")) == NULL)
	345	return(1);
	346	while (fgets(buf, sizeof buf, fd) != NULL) {
	347	buf[strlen(buf)-1] = '\0';
	348	if (strcmp(tty, buf) == 0) {
	349	fclose(fd);
	350	return(1);
	351	}
	352	}
	353	fclose(fd);
	354	return(0);
	355	}
	356
88a01c09 BJ	357	showmotd()
	358	{
	359	FILE *mf;
	360	register c;
	361
	362	signal(SIGINT, catch);
f570e1ff BJ	363	if ((mf = fopen("/etc/motd","r")) != NULL) {
f570e1ff BJ	364	while ((c = getc(mf)) != EOF && stopmotd == 0)
88a01c09 BJ	365	putchar(c);
	366	fclose(mf);
	367	}
	368	signal(SIGINT, SIG_IGN);
	369	}
	370
f570e1ff	371	#undef UNKNOWN
88a01c09 BJ	372	#define UNKNOWN "su"
	373
	374	char *
	375	stypeof(ttyid)
	376	char *ttyid;
	377	{
	378	static char typebuf[16];
	379	char buf[50];
	380	register FILE *f;
	381	register char p, t, *q;
	382
	383	if (ttyid == NULL)
	384	return (UNKNOWN);
	385	f = fopen("/etc/ttytype", "r");
	386	if (f == NULL)
	387	return (UNKNOWN);
	388	/* split off end of name */
	389	for (p = q = ttyid; *p != 0; p++)
	390	if (*p == '/')
	391	q = p + 1;
	392
	393	/* scan the file */
	394	while (fgets(buf, sizeof buf, f) != NULL)
	395	{
f570e1ff	396	for (t=buf; t!=' ' && t != '\t'; t++)
88a01c09 BJ	397	;
88a01c09 BJ	398	*t++ = 0;
f570e1ff BJ	399	while (t == ' ' \|\| t == '\t')
f570e1ff BJ	400	t++;
88a01c09 BJ	401	for (p=t; *p>' '; p++)
	402	;
	403	*p = 0;
	404	if (strcmp(q,t)==0) {
	405	strcpy(typebuf, buf);
	406	fclose(f);
	407	return (typebuf);
	408	}
	409	}
	410	fclose (f);
	411	return (UNKNOWN);
	412	}
86eb6c9e BJ	413
	414	getstr(buf, cnt, err)
	415	char *buf;
	416	int cnt;
	417	char *err;
	418	{
	419	char c;
	420
	421	do {
	422	if (read(0, &c, 1) != 1)
	423	exit(1);
	424	if (--cnt < 0) {
	425	printf("%s too long\r\n", err);
	426	exit(1);
	427	}
	428	*buf++ = c;
	429	} while (c != 0);
	430	}
4f8d3876 BJ	431
	432	logerr(fmt, a1, a2, a3)
	433	char fmt, a1, a2, a3;
	434	{
	435
	436	}