posix_spawn() does avoid the copy-on-write, at least sometimes
posix_spawn() does avoid the copy-on-write, at least sometimes
Posted Jun 9, 2026 1:37 UTC (Tue) by sionescu (subscriber, #59410)In reply to: posix_spawn() does avoid the copy-on-write, at least sometimes by smcv
Parent article: Moving beyond fork() + exec()
> for example you can posix_spawn_file_actions_addclose() to close individual fds, but you can't do the equivalent of close_range()
I wrote a clone of posix_spawn with some extra extensions, like specifying which FDs to keep, and close all the remaining ones: https://github.com/sionescu/libfixposix/blob/master/src/i...