Linux 2.6 - man page for scandirat (linux section 3)
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SCANDIRAT(3) Linux Programmer's Manual SCANDIRAT(3)
scandirat - scan a directory relative to a directory file descriptor
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <fcntl.h> /* Definition of AT_* constants */
int scandirat(int dirfd, const char *dirp, struct dirent ***namelist,
int (*filter)(const struct dirent *),
int (*compar)(const struct dirent **, const struct dirent **));
The scandirat() system call operates in exactly the same way as scandir(3), except for the
differences described in this manual page.
If the pathname given in dirp is relative, then it is interpreted relative to the direc-
tory referred to by the file descriptor dirfd (rather than relative to the current working
directory of the calling process, as is done by scandir(3) for a relative pathname).
If dirp is relative and dirfd is the special value AT_FDCWD, then dirp is interpreted rel-
ative to the current working directory of the calling process (like scandir(3)).
If dirp is absolute, then dirfd is ignored.
On success, scandirat() returns the number of directory entries selected. On error, -1 is
returned and errno is set to indicate the error.
The same errors that occur for scandir(3) can also occur for scandirat(). The following
additional errors can occur for scandirat():
EBADF dirfd is not a valid file descriptor.
dirp is a relative path and dirfd is a file descriptor referring to a file other
than a directory.
scandirat() was added to glibc in version 2.15.
This function is a GNU extension.
See openat(2) for an explanation of the need for scandirat().
openat(2), scandir(3), path_resolution(7)
This page is part of release 3.55 of the Linux man-pages project. A description of the
project, and information about reporting bugs, can be found at
Linux 2012-03-17 SCANDIRAT(3)
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