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sysvinit/sysvinit-2.86-sulogin.patch

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--- src/sulogin.c
+++ src/sulogin.c 2005-10-19 11:56:43.000000000 +0200
@@ -23,13 +23,16 @@
#include <pwd.h>
#include <shadow.h>
#include <termios.h>
+#include <sys/ttydefaults.h>
#include <sys/ioctl.h>
+#include <errno.h>
#if defined(__GLIBC__)
# include <crypt.h>
#endif
#define CHECK_DES 1
#define CHECK_MD5 1
+#define FIXTTY 1
#define F_PASSWD "/etc/passwd"
#define F_SHADOW "/etc/shadow"
@@ -37,49 +40,80 @@
char *Version = "@(#)sulogin 2.85-3 23-Apr-2003 miquels@cistron.nl";
-int timeout = 0;
-int profile = 0;
+static int timeout;
+static int profile;
+
+static void (*saved_sigint) = SIG_DFL;
+static void (*saved_sigtstp) = SIG_DFL;
+static void (*saved_sigquit) = SIG_DFL;
#ifndef IUCLC
# define IUCLC 0
#endif
-#if 0
+#if FIXTTY
/*
* Fix the tty modes and set reasonable defaults.
* (I'm not sure if this is needed under Linux, but..)
*/
+static
void fixtty(void)
{
struct termios tty;
+ int serial;
+
+ /* Skip serial console */
+ if (ioctl (0, TIOCMGET, (char*)&serial) == 0)
+ goto out;
+ /* Expected error */
+ serial = errno = 0;
tcgetattr(0, &tty);
- /*
- * Set or adjust tty modes.
- */
- tty.c_iflag &= ~(INLCR|IGNCR|IUCLC);
- tty.c_iflag |= ICRNL;
- tty.c_oflag &= ~(OCRNL|OLCUC|ONOCR|ONLRET|OFILL);
- tty.c_oflag |= OPOST|ONLCR;
- tty.c_cflag |= CLOCAL;
- tty.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE;
-
- /*
- * Set the most important characters */
- */
- tty.c_cc[VINTR] = 3;
- tty.c_cc[VQUIT] = 28;
- tty.c_cc[VERASE] = 127;
- tty.c_cc[VKILL] = 24;
- tty.c_cc[VEOF] = 4;
- tty.c_cc[VTIME] = 0;
- tty.c_cc[VMIN] = 1;
- tty.c_cc[VSTART] = 17;
- tty.c_cc[VSTOP] = 19;
- tty.c_cc[VSUSP] = 26;
+ /* Use defaults of <sys/ttydefaults.h> for base settings */
+ tty.c_iflag |= TTYDEF_IFLAG;
+ tty.c_oflag |= TTYDEF_OFLAG;
+ tty.c_lflag |= TTYDEF_LFLAG;
+ tty.c_cflag |= (TTYDEF_SPEED | TTYDEF_CFLAG);
+
+ /* Sane setting, allow eight bit characters, no carriage return delay
+ * the same result as `stty sane cr0 pass8'
+ */
+ tty.c_iflag |= (BRKINT | ICRNL | IMAXBEL);
+ tty.c_iflag &= ~(IGNBRK | INLCR | IGNCR | IXOFF | IUCLC | IXANY | ISTRIP);
+ tty.c_oflag |= (OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0);
+ tty.c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | OFDEL |\
+ NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
+ tty.c_lflag |= (ISIG | ICANON | IEXTEN | ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE);
+ tty.c_lflag &= ~(ECHONL | NOFLSH | XCASE | TOSTOP | ECHOPRT);
+ tty.c_cflag |= (CREAD | CS8 | B9600);
+ tty.c_cflag &= ~(PARENB);
+
+ /* VTIME and VMIN can overlap with VEOF and VEOL since they are
+ * only used for non-canonical mode. We just set the at the
+ * beginning, so nothing bad should happen.
+ */
+ tty.c_cc[VTIME] = 0;
+ tty.c_cc[VMIN] = 1;
+ tty.c_cc[VINTR] = CINTR;
+ tty.c_cc[VQUIT] = CQUIT;
+ tty.c_cc[VERASE] = CERASE; /* ASCII DEL (0177) */
+ tty.c_cc[VKILL] = CKILL;
+ tty.c_cc[VEOF] = CEOF;
+ tty.c_cc[VSWTC] = _POSIX_VDISABLE;
+ tty.c_cc[VSTART] = CSTART;
+ tty.c_cc[VSTOP] = CSTOP;
+ tty.c_cc[VSUSP] = CSUSP;
+ tty.c_cc[VEOL] = _POSIX_VDISABLE;
+ tty.c_cc[VREPRINT] = CREPRINT;
+ tty.c_cc[VDISCARD] = CDISCARD;
+ tty.c_cc[VWERASE] = CWERASE;
+ tty.c_cc[VLNEXT] = CLNEXT;
+ tty.c_cc[VEOL2] = _POSIX_VDISABLE;
tcsetattr(0, TCSANOW, &tty);
+out:
+ return;
}
#endif
@@ -87,7 +121,8 @@
/*
* Called at timeout.
*/
-void alrm_handler()
+static
+void alrm_handler(int sig)
{
}
@@ -96,6 +131,7 @@
* password is checked for traditional-style DES and
* FreeBSD-style MD5 encryption.
*/
+static
int valid(char *pass)
{
char *s;
@@ -134,6 +170,7 @@
/*
* Set a variable if the value is not NULL.
*/
+static
void set(char **var, char *val)
{
if (val) *var = val;
@@ -142,6 +179,7 @@
/*
* Get the root password entry.
*/
+static
struct passwd *getrootpwent(int try_manually)
{
static struct passwd pwd;
@@ -244,6 +282,7 @@
* Ask for the password. Note that there is no
* default timeout as we normally skip this during boot.
*/
+static
char *getpasswd(char *crypted)
{
struct sigaction sa;
@@ -252,11 +291,10 @@
char *ret = pass;
int i;
- if (crypted[0])
- printf("Give root password for maintenance\n");
- else
- printf("Press enter for maintenance\n");
- printf("(or type Control-D to continue): ");
+ if (crypted[0]) {
+ printf("Give root password for login: ");
+ } else
+ printf("Press enter for login: ");
fflush(stdout);
tcgetattr(0, &old);
@@ -291,6 +329,7 @@
/*
* Password was OK, execute a shell.
*/
+static
void sushell(struct passwd *pwd)
{
char shell[128];
@@ -332,9 +371,9 @@
* Try to execute a shell.
*/
setenv("SHELL", sushell, 1);
- signal(SIGINT, SIG_DFL);
- signal(SIGTSTP, SIG_DFL);
- signal(SIGQUIT, SIG_DFL);
+ signal(SIGINT, saved_sigint);
+ signal(SIGTSTP, saved_sigtstp);
+ signal(SIGQUIT, saved_sigquit);
execl(sushell, shell, NULL);
perror(sushell);
@@ -343,6 +382,7 @@
perror(BINSH);
}
+static
void usage(void)
{
fprintf(stderr, "Usage: sulogin [-e] [-p] [-t timeout] [tty device]\n");
@@ -385,50 +425,69 @@
/*
* See if we need to open an other tty device.
*/
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_IGN);
- signal(SIGTSTP, SIG_IGN);
+ saved_sigint = signal(SIGINT, SIG_IGN);
+ saved_sigtstp = signal(SIGQUIT, SIG_IGN);
+ saved_sigquit = signal(SIGTSTP, SIG_IGN);
if (optind < argc) tty = argv[optind];
- if (tty) {
- if ((fd = open(tty, O_RDWR)) < 0) {
- perror(tty);
- } else if (!isatty(fd)) {
- fprintf(stderr, "%s: not a tty\n", tty);
- close(fd);
- } else {
-
- /*
- * Only go through this trouble if the new
- * tty doesn't fall in this process group.
- */
- pid = getpid();
- pgrp = getpgid(0);
- ppgrp = getpgid(getppid());
- ioctl(fd, TIOCGPGRP, &ttypgrp);
-
- if (pgrp != ttypgrp && ppgrp != ttypgrp) {
- if (pid != getsid(0)) {
- if (pid == getpgid(0))
- setpgid(0, getpgid(getppid()));
- setsid();
- }
- signal(SIGHUP, SIG_IGN);
+ if (!tty && !(tty = getenv("CONSOLE")))
+ tty = "/dev/console";
+
+ if ((fd = open(tty, O_RDWR)) < 0) {
+ perror(tty);
+ fd = dup(0);
+ }
+
+ if (!isatty(fd)) {
+ fprintf(stderr, "%s: not a tty\n", tty);
+ close(fd);
+ } else {
+
+ /*
+ * Only go through this trouble if the new
+ * tty doesn't fall in this process group.
+ */
+ pid = getpid();
+ pgrp = getpgid(0);
+ ppgrp = getpgid(getppid());
+ ttypgrp = tcgetpgrp(fd);
+
+ if (pgrp != ttypgrp && ppgrp != ttypgrp) {
+ if (pid != getsid(0)) {
+ if (pid == getpgid(0))
+ setpgid(0, getpgid(getppid()));
+ setsid();
+ }
+
+ signal(SIGHUP, SIG_IGN);
+ if (ttypgrp > 0)
ioctl(0, TIOCNOTTY, (char *)1);
- signal(SIGHUP, SIG_DFL);
- close(0);
- close(1);
- close(2);
+ signal(SIGHUP, SIG_DFL);
+ close(0);
+ close(1);
+ close(2);
+ if (fd > 2)
close(fd);
- fd = open(tty, O_RDWR);
+ if ((fd = open(tty, O_RDWR)) < 0) {
+ perror(tty);
+ } else {
+ tcsetpgrp(fd, ppgrp);
ioctl(0, TIOCSCTTY, (char *)1);
- dup(fd);
- dup(fd);
- } else
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ if (fd > 2)
+ close(fd);
+ }
+ } else
+ if (fd > 2)
close(fd);
- }
}
+#if FIXTTY
+ fixtty();
+#endif
+
/*
* Get the root password.
*/
@@ -445,6 +504,9 @@
if (pwd->pw_passwd[0] == 0 ||
strcmp(crypt(p, pwd->pw_passwd), pwd->pw_passwd) == 0)
sushell(pwd);
+ saved_sigquit = signal(SIGQUIT, SIG_IGN);
+ saved_sigtstp = signal(SIGTSTP, SIG_IGN);
+ saved_sigint = signal(SIGINT, SIG_IGN);
printf("Login incorrect.\n");
}
@@ -453,4 +515,3 @@
*/
return 0;
}
-
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