Rich Felker d5304147b9 block uid/gid changes during posix_spawn ... usage of vfork creates a situation where a process of lower privilege may momentarily have write access to the memory of a process of higher privilege. consider the case of a multi-threaded suid program which is calling posix_spawn in one thread while another thread drops the elevated privileges then runs untrusted (relative to the elevated privilege) code as the original invoking user. this untrusted code can then potentially modify the data the child process will use before calling exec, for example changing the pathname or arguments that will be passed to exec. note that if vfork is implemented as fork, the lock will not be held until the child execs, but since memory is not shared it does not matter.		2012-10-15 11:42:46 -04:00
..
i386	support vfork on i386	2011-10-14 23:56:31 -04:00
x86_64	x86_64 vfork implementation	2012-02-06 18:23:11 -05:00
execl.c	correct variadic prototypes for execl* family	2011-04-27 16:06:33 -04:00
execle.c	correct variadic prototypes for execl* family	2011-04-27 16:06:33 -04:00
execlp.c	correct variadic prototypes for execl* family	2011-04-27 16:06:33 -04:00
execv.c	initial check-in, version 0.5.0	2011-02-12 00:22:29 -05:00
execve.c	global cleanup to use the new syscall interface	2011-03-20 00:16:43 -04:00
execvp.c	fix various bugs in path and error handling in execvp/fexecve	2011-09-29 00:48:04 -04:00
fdop.h	fix backwards posix_spawn file action order	2011-05-29 12:58:02 -04:00
fexecve.c	fix various bugs in path and error handling in execvp/fexecve	2011-09-29 00:48:04 -04:00
fork.c	use weak aliases rather than function pointers to simplify some code	2011-08-06 20:09:51 -04:00
posix_spawn.c	block uid/gid changes during posix_spawn	2012-10-15 11:42:46 -04:00
posix_spawn_file_actions_addclose.c	fix backwards posix_spawn file action order	2011-05-29 12:58:02 -04:00
posix_spawn_file_actions_adddup2.c	fix backwards posix_spawn file action order	2011-05-29 12:58:02 -04:00
posix_spawn_file_actions_addopen.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawn_file_actions_destroy.c	add file actions support to posix_spawn	2011-05-28 23:30:47 -04:00
posix_spawn_file_actions_init.c	initial implementation of posix_spawn	2011-05-28 18:36:30 -04:00
posix_spawnattr_destroy.c	add missing posix_spawnattr_init/destroy functions	2011-09-13 14:45:59 -04:00
posix_spawnattr_getflags.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnattr_getpgroup.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnattr_getsigdefault.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnattr_getsigmask.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnattr_init.c	add missing posix_spawnattr_init/destroy functions	2011-09-13 14:45:59 -04:00
posix_spawnattr_setflags.c	initial implementation of posix_spawn	2011-05-28 18:36:30 -04:00
posix_spawnattr_setpgroup.c	initial implementation of posix_spawn	2011-05-28 18:36:30 -04:00
posix_spawnattr_setsigdefault.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnattr_setsigmask.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
posix_spawnp.c	use restrict everywhere it's required by c99 and/or posix 2008	2012-09-06 22:44:55 -04:00
system.c	initial check-in, version 0.5.0	2011-02-12 00:22:29 -05:00
vfork.c	make available a namespace-safe vfork, if supported	2011-10-14 23:34:12 -04:00
wait.c	initial check-in, version 0.5.0	2011-02-12 00:22:29 -05:00
waitid.c	overhaul pthread cancellation	2011-04-17 11:43:03 -04:00
waitpid.c	overhaul pthread cancellation	2011-04-17 11:43:03 -04:00