sortix-mirror/libc/dirent/fdopendir.c

37 lines
1.3 KiB
C

/*
* Copyright (c) 2011, 2014, 2015 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* dirent/fdopendir.c
* Handles the file descriptor backend for the DIR* API on Sortix.
*/
#include <dirent.h>
#include <DIR.h>
#include <fcntl.h>
#include <stdlib.h>
DIR* fdopendir(int fd)
{
int old_dflags = fcntl(fd, F_GETFD);
if ( 0 <= old_dflags && !(old_dflags & FD_CLOEXEC) )
fcntl(fd, F_SETFD, old_dflags | FD_CLOEXEC);
// TODO: Potentially reopen as O_EXEC when the kernel requires that.
DIR* dir = (DIR*) calloc(sizeof(DIR), 1);
if ( !dir )
return NULL;
dir->fd = fd;
return dir;
}