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manual: add dup3 

Reviewed-by: Florian Weimer <fweimer@redhat.com>
This commit is contained in:
DJ Delorie 2024-05-10 17:34:29 -04:00
parent e3c375eb4f
commit a07e000e82
1 changed files with 8 additions and 0 deletions
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8
manual/llio.texi
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@ -3415,6 +3415,14 @@ middle of calling @code{dup2} at which @var{new} is closed and not yet a
duplicate of @var{old}. duplicate of @var{old}.
@end deftypefun @end deftypefun
@deftypefun int dup3 (int @var{old}, int @var{new}, int @var{flags})
@standards{Linux, unistd.h}
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
This function is the same as @code{dup2} but creates the new
descriptor as if it had been opened with flags @var{flags}. The only
allowed flag is @code{O_CLOEXEC}.
@end deftypefun
@deftypevr Macro int F_DUPFD @deftypevr Macro int F_DUPFD
@standards{POSIX.1, fcntl.h} @standards{POSIX.1, fcntl.h}
This macro is used as the @var{command} argument to @code{fcntl}, to This macro is used as the @var{command} argument to @code{fcntl}, to