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* use vfork if possible in posix_spawnRich Felker2012-09-141-1/+3
| | | | | | vfork is implemented as the fork syscall (with no atfork handlers run) on archs where it is not available, so this change does not introduce any change in behavior or regression for such archs.
* use restrict everywhere it's required by c99 and/or posix 2008Rich Felker2012-09-061-6/+6
| | | | | | | | to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.
* fix various errors in function signatures/prototypes found by nszRich Felker2011-09-131-3/+5
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* fix backwards posix_spawn file action orderRich Felker2011-05-291-2/+3
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* add file actions support to posix_spawnRich Felker2011-05-281-0/+28
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* posix_spawn: honor POSIX_SPAWN_SETSIGDEF flagRich Felker2011-05-281-1/+3
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* initial implementation of posix_spawnRich Felker2011-05-281-0/+65
file actions are not yet implemented, but everything else should be mostly complete and roughly correct.