Added a few lines about POSIX_SPAWN_USEVFORK so that it appears clearly that since glibc 2.24, the flag has no effect. Signed-off-by: Olivier Gayot <olivier.gayot@xxxxxxxxxxx> --- man3/posix_spawn.3 | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/man3/posix_spawn.3 b/man3/posix_spawn.3 index e8c0de172..8badb43bf 100644 --- a/man3/posix_spawn.3 +++ b/man3/posix_spawn.3 @@ -382,6 +382,18 @@ the child's process group ID is made the same as its process ID. If the .B POSIX_SPAWN_SETPGROUP flag is not set, the child inherits the parent's process group ID. +.TP +.B POSIX_SPAWN_USEVFORK +Since glibc 2.24, this flag has no effect. +On older implementations, setting this flag forces the +.BR fork() +step to use +.BR vfork (2) +instead of +.BR fork (2). +The +.B _GNU_SOURCE +feature test macro must be defined to obtain the definition of this contant. .PP If .I attrp -- 2.19.1
