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

static	char *sccsid = "@(#)login.c	4.19 82/11/14";
/*
 * 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"};
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;

#define	CTRL(c)	('c'&037)
#define	CERASE	'#'
#define	CEOT	CTRL(d)
#define	CKILL	'@'
#define	CQUIT	034		/* FS, cntl shift L */
#define	CINTR	0177		/* DEL */
#define	CSTOP	CTRL(s)
#define	CSTART	CTRL(q)
#define	CBRK	0377
struct	tchars tc = {
	CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
};
struct	ltchars ltc = {
	CTRL(z), CTRL(y), CTRL(r), CTRL(o), CTRL(w), CTRL(v)
};

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);
	ioctl(0, TIOCNXCL, 0);
	ioctl(0, FIONBIO, &zero);
	ioctl(0, FIOASYNC, &zero);
	gtty(0, &ttyb);
	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;
	}
	ttyb.sg_erase = CERASE;
	ttyb.sg_kill = CKILL;
	stty(0, &ttyb);
	ioctl(0, TIOCSETC, &tc);
	ioctl(0, TIOCSLTC, &ltc);
	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) {
			strcpy(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, 622);
	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
b1198826	1	static char *sccsid = "@(#)login.c 4.19 82/11/14";
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/";
	28	char lastlog[] = "/usr/adm/lastlog";
	29	struct passwd nouser = {"", "nope"};
	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
841d84b0 BJ	57	#define CTRL(c) ('c'&037)
	58	#define CERASE '#'
	59	#define CEOT CTRL(d)
	60	#define CKILL '@'
	61	#define CQUIT 034 /* FS, cntl shift L */
	62	#define CINTR 0177 /* DEL */
	63	#define CSTOP CTRL(s)
	64	#define CSTART CTRL(q)
	65	#define CBRK 0377
	66	struct tchars tc = {
	67	CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
	68	};
	69	struct ltchars ltc = {
1113d588	70	CTRL(z), CTRL(y), CTRL(r), CTRL(o), CTRL(w), CTRL(v)
841d84b0 BJ	71	};
841d84b0 BJ	72
86eb6c9e	73	int rflag;
b4389814	74	char rusername[NMAX+1], lusername[NMAX+1];
86eb6c9e	75	char rpassword[NMAX+1];
e5321f7b	76	char name[NMAX+1];
b4389814	77	char *rhost;
86eb6c9e	78
88a01c09 BJ	79	main(argc, argv)
	80	char **argv;
	81	{
	82	register char *namep;
	83	int t, f, c;
f570e1ff BJ	84	int invalid;
	85	int quietlog;
	86	int i;
	87	FILE *nlfd;
88a01c09	88	char *ttyn;
b4389814 BJ	89	int ldisc = 0, zero = 0;
b4389814 BJ	90	FILE *hostf; int first = 1;
88a01c09 BJ	91
	92	alarm(60);
	93	signal(SIGQUIT, SIG_IGN);
	94	signal(SIGINT, SIG_IGN);
	95	nice(-100);
	96	nice(20);
	97	nice(0);
4f8d3876	98	if (argc > 1 && !strcmp(argv[1], "-r")) {
86eb6c9e	99	rflag++;
4f8d3876	100	rhost = argv[2];
b4389814	101	argc = 1;
4f8d3876 BJ	102	getstr(rusername, sizeof (rusername), "remuser");
4f8d3876 BJ	103	getstr(lusername, sizeof (lusername), "locuser");
86eb6c9e	104	getstr(term+5, sizeof(term)-5, "Terminal type");
4f8d3876 BJ	105	if (getuid())
4f8d3876 BJ	106	goto abnormal;
b4389814 BJ	107	setpwent();
b4389814 BJ	108	pwd = getpwnam(lusername);
4f8d3876	109	endpwent();
b4389814	110	if (pwd == NULL) {
4f8d3876 BJ	111	if (strcmp(rusername, lusername))
	112	printf("%s: No such user\r\n", lusername);
	113	goto abnormal;
b4389814	114	}
1886582e	115	hostf = pwd->pw_uid ? fopen("/etc/hosts.equiv", "r") : 0;
b4389814 BJ	116	again:
	117	if (hostf) {
	118	char ahost[32];
	119	while (fgets(ahost, sizeof (ahost), hostf)) {
	120	char *user;
	121	if (index(ahost, '\n'))
	122	*index(ahost, '\n') = 0;
	123	user = index(ahost, ' ');
	124	if (user)
	125	*user++ = 0;
	126	if (!strcmp(rhost, ahost) &&
4f8d3876 BJ	127	!strcmp(rusername, user ? user : lusername)) {
4f8d3876 BJ	128	fclose(hostf);
b4389814	129	goto normal;
4f8d3876	130	}
b4389814 BJ	131	}
	132	fclose(hostf);
	133	}
	134	if (first == 1) {
	135	first = 0;
	136	if (chdir(pwd->pw_dir) < 0)
	137	goto again;
	138	hostf = fopen(".rhosts", "r");
	139	goto again;
	140	}
4f8d3876	141	abnormal:
b4389814 BJ	142	rhost = 0;
b4389814 BJ	143	rflag = -1;
86eb6c9e	144	}
b4389814 BJ	145	normal:
b4389814 BJ	146	ioctl(0, TIOCLSET, &zero);
c95ed2b2	147	ioctl(0, TIOCNXCL, 0);
4f8d3876 BJ	148	ioctl(0, FIONBIO, &zero);
4f8d3876 BJ	149	ioctl(0, FIOASYNC, &zero);
88a01c09	150	gtty(0, &ttyb);
86eb6c9e BJ	151	if (rflag) {
	152	char *cp = index(term, '/');
	153	if (cp) {
	154	int i;
	155	*cp++ = 0;
	156	for (i = 0; i < NSPEEDS; i++)
	157	if (!strcmp(speeds[i], cp)) {
	158	ttyb.sg_ispeed = ttyb.sg_ospeed = i;
	159	break;
	160	}
	161	}
	162	ttyb.sg_flags = ECHO\|CRMOD\|ANYP\|XTABS;
	163	}
f570e1ff BJ	164	ttyb.sg_erase = CERASE;
f570e1ff BJ	165	ttyb.sg_kill = CKILL;
88a01c09	166	stty(0, &ttyb);
841d84b0 BJ	167	ioctl(0, TIOCSETC, &tc);
841d84b0 BJ	168	ioctl(0, TIOCSLTC, &ltc);
88a01c09 BJ	169	for (t=3; t<20; t++)
	170	close(t);
	171	ttyn = ttyname(0);
f570e1ff	172	if (ttyn==(char *)0)
88a01c09	173	ttyn = "/dev/tty??";
f570e1ff BJ	174	do {
f570e1ff BJ	175	ldisc = 0;
c95ed2b2	176	ioctl(0, TIOCSETD, &ldisc);
f570e1ff BJ	177	invalid = FALSE;
	178	SCPYN(utmp.ut_name, "");
	179	if (argc>1) {
	180	SCPYN(utmp.ut_name, argv[1]);
	181	argc = 0;
	182	}
4f8d3876	183	if (rflag) {
b4389814	184	strcpy(utmp.ut_name, lusername);
4f8d3876 BJ	185	if (rflag == -1)
	186	rflag = 0;
	187	} else
b4389814 BJ	188	while (utmp.ut_name[0] == '\0') {
	189	namep = utmp.ut_name;
	190	{ char hostname[32];
	191	gethostname(hostname, sizeof (hostname));
	192	printf("%s login: ", hostname); }
	193	while ((c = getchar()) != '\n') {
	194	if (c == ' ')
	195	c = '_';
	196	if (c == EOF)
	197	exit(0);
	198	if (namep < utmp.ut_name+NMAX)
	199	*namep++ = c;
	200	}
f570e1ff	201	}
b4389814 BJ	202	if (rhost == 0) {
	203	setpwent();
	204	if ((pwd = getpwnam(utmp.ut_name)) == NULL)
	205	pwd = &nouser;
	206	endpwent();
f570e1ff	207	}
f570e1ff BJ	208	if (!strcmp(pwd->pw_shell, "/bin/csh")) {
	209	ldisc = NTTYDISC;
	210	ioctl(0, TIOCSETD, &ldisc);
	211	}
b4389814 BJ	212	if (rhost == 0) {
	213	if (*pwd->pw_passwd != '\0') {
	214	char *pp;
	215	nice(-4);
	216	if (rflag == 0)
	217	pp = getpass("Password:");
	218	else
	219	pp = rpassword;
	220	namep = crypt(pp,pwd->pw_passwd);
	221	nice(4);
	222	if (strcmp(namep, pwd->pw_passwd))
	223	invalid = TRUE;
	224	}
f570e1ff BJ	225	}
	226	if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
	227	/* logins are disabled except for root */
	228	while ((c = getc(nlfd)) != EOF)
	229	putchar(c);
	230	fflush(stdout);
	231	sleep(5);
	232	exit(0);
	233	}
	234	if (!invalid && pwd->pw_uid == 0 &&
	235	!rootterm(ttyn+sizeof("/dev/")-1)) {
4f8d3876 BJ	236	logerr("ROOT LOGIN REFUSED %s",
4f8d3876 BJ	237	ttyn+sizeof("/dev/")-1);
f570e1ff BJ	238	invalid = TRUE;
	239	}
	240	if (invalid) {
88a01c09	241	printf("Login incorrect\n");
4f8d3876 BJ	242	if (ttyn[sizeof("/dev/tty")-1] == 'd')
	243	logerr("BADDIALUP %s %s\n",
	244	ttyn+sizeof("/dev/")-1, utmp.ut_name);
88a01c09	245	}
f570e1ff BJ	246	if (*pwd->pw_shell == '\0')
	247	pwd->pw_shell = "/bin/sh";
	248	i = strlen(pwd->pw_shell);
	249	if (chdir(pwd->pw_dir) < 0 && !invalid ) {
	250	if (chdir("/") < 0) {
	251	printf("No directory!\n");
	252	invalid = TRUE;
	253	} else {
	254	printf("No directory! Logging in with home=/\n");
	255	pwd->pw_dir = "/";
	256	}
88a01c09	257	}
86eb6c9e BJ	258	if (rflag && invalid)
86eb6c9e BJ	259	exit(1);
f570e1ff	260	} while (invalid);
88a01c09	261
86eb6c9e	262
88a01c09 BJ	263	time(&utmp.ut_time);
	264	t = ttyslot();
	265	if (t>0 && (f = open("/etc/utmp", 1)) >= 0) {
	266	lseek(f, (long)(t*sizeof(utmp)), 0);
	267	SCPYN(utmp.ut_line, rindex(ttyn, '/')+1);
	268	write(f, (char *)&utmp, sizeof(utmp));
	269	close(f);
	270	}
	271	if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
	272	lseek(f, 0L, 2);
	273	write(f, (char *)&utmp, sizeof(utmp));
	274	close(f);
	275	}
4f8d3876	276	quietlog = 0;
f570e1ff	277	if (access(qlog, 0) == 0)
4f8d3876 BJ	278	quietlog = 1;
4f8d3876 BJ	279	if ((f = open(lastlog, 2)) >= 0) {
f570e1ff BJ	280	struct lastlog ll;
	281
	282	lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
	283	if (read(f, (char *) &ll, sizeof ll) == sizeof ll &&
	284	ll.ll_time != 0) {
4f8d3876	285	if (quietlog == 0)
f570e1ff BJ	286	printf("Last login: %.s on %.s\n"
	287	, 24-5
	288	, (char *) ctime(&ll.ll_time)
	289	, sizeof(ll.ll_line)
	290	, ll.ll_line
	291	);
	292	}
	293	lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
	294	time(&ll.ll_time);
	295	SCPYN(ll.ll_line, rindex(ttyn, '/')+1);
	296	write(f, (char *) &ll, sizeof ll);
	297	close(f);
	298	}
88a01c09	299	chown(ttyn, pwd->pw_uid, pwd->pw_gid);
12d1bcdd	300	chmod(ttyn, 622);
88a01c09	301	setgid(pwd->pw_gid);
e5321f7b KM	302	strncpy(name, utmp.ut_name, NMAX);
e5321f7b KM	303	name[NMAX] = '\0';
b1198826	304	initgroups(name, pwd->pw_gid);
88a01c09	305	setuid(pwd->pw_uid);
88a01c09 BJ	306	environ = envinit;
	307	strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
	308	strncat(shell, pwd->pw_shell, sizeof(shell)-7);
4f8d3876	309	if (term[strlen("TERM=")] == 0)
86eb6c9e	310	strncat(term, stypeof(ttyn), sizeof(term)-6);
f570e1ff	311	strncat(user, pwd->pw_name, sizeof(user)-6);
88a01c09 BJ	312	if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
	313	namep = pwd->pw_shell;
	314	else
	315	namep++;
	316	strcat(minusnam, namep);
	317	alarm(0);
b4389814	318	umask(022);
4f8d3876 BJ	319	if (ttyn[sizeof("/dev/tty")-1] == 'd')
	320	logerr("DIALUP %s %s\n", ttyn+sizeof("/dev/")-1, pwd->pw_name);
	321	if (!quietlog) {
f570e1ff BJ	322	showmotd();
	323	strcat(maildir, pwd->pw_name);
	324	if (access(maildir,4)==0) {
	325	struct stat statb;
	326	stat(maildir, &statb);
	327	if (statb.st_size)
	328	printf("You have mail.\n");
	329	}
	330	}
	331
88a01c09 BJ	332	signal(SIGQUIT, SIG_DFL);
88a01c09 BJ	333	signal(SIGINT, SIG_DFL);
5f87416f	334	signal(SIGTSTP, SIG_IGN);
88a01c09	335	execlp(pwd->pw_shell, minusnam, 0);
f570e1ff	336	perror(pwd->pw_shell);
88a01c09 BJ	337	printf("No shell\n");
	338	exit(0);
	339	}
	340
	341	int stopmotd;
	342	catch()
	343	{
1886582e	344
88a01c09 BJ	345	signal(SIGINT, SIG_IGN);
	346	stopmotd++;
	347	}
	348
f570e1ff	349	rootterm(tty)
1886582e	350	char *tty;
f570e1ff BJ	351	{
f570e1ff BJ	352	register FILE *fd;
1886582e	353	char buf[100];
f570e1ff	354
1886582e BJ	355	if (rflag)
1886582e BJ	356	return(1);
f570e1ff BJ	357	if ((fd = fopen(securetty, "r")) == NULL)
	358	return(1);
	359	while (fgets(buf, sizeof buf, fd) != NULL) {
	360	buf[strlen(buf)-1] = '\0';
	361	if (strcmp(tty, buf) == 0) {
	362	fclose(fd);
	363	return(1);
	364	}
	365	}
	366	fclose(fd);
	367	return(0);
	368	}
	369
88a01c09 BJ	370	showmotd()
	371	{
	372	FILE *mf;
	373	register c;
	374
	375	signal(SIGINT, catch);
f570e1ff BJ	376	if ((mf = fopen("/etc/motd","r")) != NULL) {
f570e1ff BJ	377	while ((c = getc(mf)) != EOF && stopmotd == 0)
88a01c09 BJ	378	putchar(c);
	379	fclose(mf);
	380	}
	381	signal(SIGINT, SIG_IGN);
	382	}
	383
f570e1ff	384	#undef UNKNOWN
88a01c09 BJ	385	#define UNKNOWN "su"
	386
	387	char *
	388	stypeof(ttyid)
	389	char *ttyid;
	390	{
	391	static char typebuf[16];
	392	char buf[50];
	393	register FILE *f;
	394	register char p, t, *q;
	395
	396	if (ttyid == NULL)
	397	return (UNKNOWN);
	398	f = fopen("/etc/ttytype", "r");
	399	if (f == NULL)
	400	return (UNKNOWN);
	401	/* split off end of name */
	402	for (p = q = ttyid; *p != 0; p++)
	403	if (*p == '/')
	404	q = p + 1;
	405
	406	/* scan the file */
	407	while (fgets(buf, sizeof buf, f) != NULL)
	408	{
f570e1ff	409	for (t=buf; t!=' ' && t != '\t'; t++)
88a01c09 BJ	410	;
88a01c09 BJ	411	*t++ = 0;
f570e1ff BJ	412	while (t == ' ' \|\| t == '\t')
f570e1ff BJ	413	t++;
88a01c09 BJ	414	for (p=t; *p>' '; p++)
	415	;
	416	*p = 0;
	417	if (strcmp(q,t)==0) {
	418	strcpy(typebuf, buf);
	419	fclose(f);
	420	return (typebuf);
	421	}
	422	}
	423	fclose (f);
	424	return (UNKNOWN);
	425	}
86eb6c9e BJ	426
	427	getstr(buf, cnt, err)
	428	char *buf;
	429	int cnt;
	430	char *err;
	431	{
	432	char c;
	433
	434	do {
	435	if (read(0, &c, 1) != 1)
	436	exit(1);
	437	if (--cnt < 0) {
	438	printf("%s too long\r\n", err);
	439	exit(1);
	440	}
	441	*buf++ = c;
	442	} while (c != 0);
	443	}
4f8d3876 BJ	444
	445	logerr(fmt, a1, a2, a3)
	446	char fmt, a1, a2, a3;
	447	{
	448
	449	}