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Apply last_patch47 from vodz to fix several problems, such as the ash "job

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control turned off" bug, console_setup() was called with a closed file
descriptor, setsid() inconsistancy, and silly string handling bugs.   I have
modified his patch to allow the askfirst init actions to have a controlling
terminal.
This commit is contained in:
Eric Andersen 2002-07-03 11:08:10 +00:00
parent 935daf2d0d
commit 599e3ce163
1 changed files with 31 additions and 24 deletions
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55
init/init.c
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@ -484,15 +484,11 @@ static pid_t run(struct init_action *a)
if ((pid = fork()) == 0)
{
/* Clean up */
ioctl(0, TIOCNOTTY, 0);
close(0);
close(1);
close(2);
sigprocmask(SIG_SETMASK, &omask, NULL);
/* Create a new session and make ourself the process group leader */
setsid();
/* Reset signal handlers that were set by the parent process */
signal(SIGUSR1, SIG_DFL);
signal(SIGUSR2, SIG_DFL);
@ -503,6 +499,11 @@ static pid_t run(struct init_action *a)
signal(SIGSTOP, SIG_DFL);
signal(SIGTSTP, SIG_DFL);
/* Create a new session and make ourself the process
* group leader for non-interactive jobs */
if ((a->action & (RESPAWN))==0)
setsid();
/* Open the new terminal device */
if ((fd = device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) {
if (stat(a->terminal, &sb) != 0) {
@ -513,19 +514,26 @@ static pid_t run(struct init_action *a)
message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal);
_exit(1);
}
/* Non-interactive jobs should not get a controling tty */
if ((a->action & (RESPAWN))==0)
(void)ioctl(fd, TIOCSCTTY, 0);
/* Make sure the terminal will act fairly normal for us */
set_term(0);
/* Setup stdin, stdout, stderr for the new process so
* they point to the supplied terminal */
dup(fd);
dup(fd);
/* If the init Action requires up to wait, then force the
/* For interactive jobs, create a new session
* and become the process group leader */
if ((a->action & (RESPAWN)))
setsid();
/* If the init Action requires us to wait, then force the
* supplied terminal to be the controlling tty. */
if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART|ASKFIRST)) {
/* Take over the controlling tty */
ioctl(fd, TIOCSCTTY, 1);
/* Setup stdin, stdout, stderr for the new process so
* they point to the supplied terminal */
dup(fd);
dup(fd);
if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) {
/* Now fork off another process to just hang around */
if ((pid = fork()) < 0) {
@ -542,13 +550,11 @@ static pid_t run(struct init_action *a)
signal(SIGCHLD, SIG_DFL);
/* Wait for child to exit */
while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) {
if (tmp_pid < 0 && errno == ECHILD)
break;
}
while ((tmp_pid = waitpid(pid, &junk, 0)) != pid)
;
/* See if stealing the controlling tty back is necessary */
pgrp = tcgetpgrp(tmp_pid);
pgrp = tcgetpgrp(fd);
if (pgrp != getpid())
_exit(0);
@ -570,9 +576,6 @@ static pid_t run(struct init_action *a)
}
/* Now fall though to actually execute things */
} else {
dup(fd);
dup(fd);
}
/* See if any special /bin/sh requiring characters are present */
@ -1079,15 +1082,19 @@ extern int init_main(int argc, char **argv)
/* Figure out what kernel this is running */
kernelVersion = get_kernel_revision();
/* Figure out where the default console should be */
console_init();
/* Close whatever files are open, and reset the console. */
close(0);
close(1);
close(2);
/* Figure out where the default console should be */
console_init();
if(device_open(console, O_RDWR|O_NOCTTY)==0) {
set_term(0);
close(0);
}
chdir("/");
setsid();