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Add extra initialisation code that is required for processes that

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are started instead of init (pid = 1). This allows an embedded
implementation quite like VxWorks, with (possibly) a single threaded
program running instead of init. The neat thing is that the same threaded
process can run in a multi-user workstation environment too.
This commit is contained in:
John Birrell 1998-08-10 01:24:22 +00:00
parent 7955cdca14
commit bbf157fac4
3 changed files with 87 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
lib/libc_r/uthread/uthread_init.c
View File

@ -38,8 +38,10 @@
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <paths.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ttycom.h>
#ifdef _THREAD_SAFE
#include <machine/reg.h>
#include <pthread.h>
@ -76,6 +78,7 @@ static void ***dynamic_allocator_handler_fn()
void
_thread_init(void)
{
int fd;
int flags;
int i;
struct sigaction act;
@ -85,6 +88,31 @@ _thread_init(void)
/* Only initialise the threaded application once. */
return;
/*
* Check for the special case of this process running as
* or in place of init as pid = 1:
*/
if (getpid() == 1) {
/*
* Setup a new session for this process which is
* assumed to be running as root.
*/
if (setsid() == -1)
PANIC("Can't set session ID");
if (revoke(_PATH_CONSOLE) != 0)
PANIC("Can't revoke console");
if ((fd = _thread_sys_open(_PATH_CONSOLE, O_RDWR)) < 0)
PANIC("Can't open console");
if (setlogin("root") == -1)
PANIC("Can't set login to root");
if (_thread_sys_ioctl(fd,TIOCSCTTY, (char *) NULL) == -1)
PANIC("Can't set controlling terminal");
if (_thread_sys_dup2(fd,0) == -1 ||
_thread_sys_dup2(fd,1) == -1 ||
_thread_sys_dup2(fd,2) == -1)
PANIC("Can't dup2");
}
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
if ((_pthread_stdio_flags[i] =
@ -154,7 +182,7 @@ _thread_init(void)
/* Initialise the global signal action structure: */
sigfillset(&act.sa_mask);
act.sa_handler = (void (*) ()) _thread_sig_handler;
act.sa_flags = SA_RESTART;
act.sa_flags = 0;
/* Enter a loop to get the existing signal status: */
for (i = 1; i < NSIG; i++) {

30
lib/libkse/thread/thr_init.c
View File

@ -38,8 +38,10 @@
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <paths.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ttycom.h>
#ifdef _THREAD_SAFE
#include <machine/reg.h>
#include <pthread.h>
@ -76,6 +78,7 @@ static void ***dynamic_allocator_handler_fn()
void
_thread_init(void)
{
int fd;
int flags;
int i;
struct sigaction act;
@ -85,6 +88,31 @@ _thread_init(void)
/* Only initialise the threaded application once. */
return;
/*
* Check for the special case of this process running as
* or in place of init as pid = 1:
*/
if (getpid() == 1) {
/*
* Setup a new session for this process which is
* assumed to be running as root.
*/
if (setsid() == -1)
PANIC("Can't set session ID");
if (revoke(_PATH_CONSOLE) != 0)
PANIC("Can't revoke console");
if ((fd = _thread_sys_open(_PATH_CONSOLE, O_RDWR)) < 0)
PANIC("Can't open console");
if (setlogin("root") == -1)
PANIC("Can't set login to root");
if (_thread_sys_ioctl(fd,TIOCSCTTY, (char *) NULL) == -1)
PANIC("Can't set controlling terminal");
if (_thread_sys_dup2(fd,0) == -1 ||
_thread_sys_dup2(fd,1) == -1 ||
_thread_sys_dup2(fd,2) == -1)
PANIC("Can't dup2");
}
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
if ((_pthread_stdio_flags[i] =
@ -154,7 +182,7 @@ _thread_init(void)
/* Initialise the global signal action structure: */
sigfillset(&act.sa_mask);
act.sa_handler = (void (*) ()) _thread_sig_handler;
act.sa_flags = SA_RESTART;
act.sa_flags = 0;
/* Enter a loop to get the existing signal status: */
for (i = 1; i < NSIG; i++) {

30
lib/libpthread/thread/thr_init.c
View File

@ -38,8 +38,10 @@
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <paths.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ttycom.h>
#ifdef _THREAD_SAFE
#include <machine/reg.h>
#include <pthread.h>
@ -76,6 +78,7 @@ static void ***dynamic_allocator_handler_fn()
void
_thread_init(void)
{
int fd;
int flags;
int i;
struct sigaction act;
@ -85,6 +88,31 @@ _thread_init(void)
/* Only initialise the threaded application once. */
return;
/*
* Check for the special case of this process running as
* or in place of init as pid = 1:
*/
if (getpid() == 1) {
/*
* Setup a new session for this process which is
* assumed to be running as root.
*/
if (setsid() == -1)
PANIC("Can't set session ID");
if (revoke(_PATH_CONSOLE) != 0)
PANIC("Can't revoke console");
if ((fd = _thread_sys_open(_PATH_CONSOLE, O_RDWR)) < 0)
PANIC("Can't open console");
if (setlogin("root") == -1)
PANIC("Can't set login to root");
if (_thread_sys_ioctl(fd,TIOCSCTTY, (char *) NULL) == -1)
PANIC("Can't set controlling terminal");
if (_thread_sys_dup2(fd,0) == -1 ||
_thread_sys_dup2(fd,1) == -1 ||
_thread_sys_dup2(fd,2) == -1)
PANIC("Can't dup2");
}
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
if ((_pthread_stdio_flags[i] =
@ -154,7 +182,7 @@ _thread_init(void)
/* Initialise the global signal action structure: */
sigfillset(&act.sa_mask);
act.sa_handler = (void (*) ()) _thread_sig_handler;
act.sa_flags = SA_RESTART;
act.sa_flags = 0;
/* Enter a loop to get the existing signal status: */
for (i = 1; i < NSIG; i++) {