-static char *sccsid = "@(#)login.c 4.10 (Berkeley) 81/02/28";
+static char *sccsid = "@(#)login.c 4.20 82/12/21";
/*
* login [ name ]
+ * login -r
*/
#include <sys/types.h>
#include <stdio.h>
#include <sys/stat.h>
#include <lastlog.h>
-#include <whoami.h>
-#ifdef UNAME
-#include <sys/utsname.h>
-#endif
#define SCPYN(a, b) strncpy(a, b, sizeof(a))
-#define NMAX sizeof(utmp.ut_name)
-#define LMAX sizeof(utmp.ut_line)
+#define NMAX sizeof(utmp.ut_name)
+#define LMAX sizeof(utmp.ut_line)
#define FALSE 0
#define TRUE -1
char securetty[] = "/etc/securetty";
char maildir[30] = "/usr/spool/mail/";
char lastlog[] = "/usr/adm/lastlog";
-struct passwd nouser = {"", "nope"};
+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 *envinit[] = {homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0};
-struct passwd *pwd;
+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();
+char *strcat(), *rindex(), *index();
int setpwent();
char *ttyname();
char *crypt();
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
-};
-#ifdef TIOCLSET
-struct ltchars ltc = {
- CTRL(z), CTRL(y), CTRL(r), CTRL(o), CTRL(w), CTRL(v)
+struct ttychars tc = {
+ CERASE, CKILL, CINTR, CQUIT, CSTART,
+ CSTOP, CEOF, CBRK, CSUSP, CDSUSP,
+ CRPRNT, CFLUSH, CWERASE,CLNEXT
};
-#endif
+
+int rflag;
+char rusername[NMAX+1], lusername[NMAX+1];
+char rpassword[NMAX+1];
+char name[NMAX+1];
+char *rhost;
main(argc, argv)
char **argv;
int i;
FILE *nlfd;
char *ttyn;
- int ldisc = 0;
-#ifdef UNAME
- struct utsname uts;
-#endif
+ int ldisc = 0, zero = 0;
+ FILE *hostf; int first = 1;
alarm(60);
signal(SIGQUIT, SIG_IGN);
nice(-100);
nice(20);
nice(0);
-#ifdef TIOCLSET
- ioctl(0, TIOCLSET, 0);
-#endif
+ 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);
- gtty(0, &ttyb);
- ttyb.sg_erase = CERASE;
- ttyb.sg_kill = CKILL;
- stty(0, &ttyb);
- ioctl(0, TIOCSETC, &tc);
-#ifdef TIOCLSET
- ioctl(0, TIOCSLTC, <c);
-#endif
+ 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);
SCPYN(utmp.ut_name, argv[1]);
argc = 0;
}
- while (utmp.ut_name[0] == '\0') {
- namep = utmp.ut_name;
-#ifdef UNAME
- if (uname(&uts) != -1)
- printf("%s login: ", uts.nodename);
- else
-#endif
- printf("login: ");
- while ((c = getchar()) != '\n') {
- if (c == ' ')
- c = '_';
- if (c == EOF)
- exit(0);
- if (namep < utmp.ut_name+NMAX)
- *namep++ = c;
+ 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();
}
- 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 (*pwd->pw_passwd != '\0') {
- nice(-4);
- namep = crypt(getpass("Password:"),pwd->pw_passwd);
- nice(4);
- if (strcmp(namep, pwd->pw_passwd))
- invalid = TRUE;
+ 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 */
}
if (!invalid && pwd->pw_uid == 0 &&
!rootterm(ttyn+sizeof("/dev/")-1)) {
- FILE *console = fopen("/dev/console", "w");
- if (console != NULL) {
- fprintf(console, "\r\nROOT LOGIN REFUSED %s\r\n"
- , ttyn+sizeof("/dev/")-1
- );
- fclose(console);
- }
+ logerr("ROOT LOGIN REFUSED %s",
+ ttyn+sizeof("/dev/")-1);
invalid = TRUE;
}
if (invalid) {
printf("Login incorrect\n");
- if (ttyn[sizeof("/dev/tty")-1] == 'd') {
- FILE *console = fopen("/dev/console", "w");
- if (console != NULL) {
- fprintf(console, "\r\nBADDIALUP %s %s\r\n"
- , ttyn+sizeof("/dev/")-1
- , utmp.ut_name);
- fclose(console);
- }
- }
+ 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";
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) {
write(f, (char *)&utmp, sizeof(utmp));
close(f);
}
- quietlog = FALSE;
+ quietlog = 0;
if (access(qlog, 0) == 0)
- quietlog = TRUE;
- if ( !quietlog && (f = open(lastlog, 2)) >= 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)
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);
- strncat(term, stypeof(ttyn), sizeof(term)-6);
+ 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;
namep++;
strcat(minusnam, namep);
alarm(0);
-#ifdef ARPAVAX
- if (pwd->pw_gid == 27) /* UGLY ! */
- umask(2);
- else
-#endif
- umask(022);
- if (ttyn[sizeof("/dev/tty")-1] == 'd') {
- FILE *console = fopen("/dev/console", "w");
- if (console != NULL) {
- fprintf(console, "\r\nDIALUP %s %s\r\n"
- , ttyn+sizeof("/dev/")-1
- , pwd->pw_name
- );
- fclose(console);
- }
- }
- if ( !quietlog ) {
+ 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) {
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");
int stopmotd;
catch()
{
+
signal(SIGINT, SIG_IGN);
stopmotd++;
}
-/*
- * return true if OK for root to login on this terminal
- */
rootterm(tty)
- char *tty;
+ char *tty;
{
register FILE *fd;
- char buf[100];
+ char buf[100];
+ if (rflag)
+ return(1);
if ((fd = fopen(securetty, "r")) == NULL)
return(1);
while (fgets(buf, sizeof buf, fd) != NULL) {
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;
+{
+
+}