CentOS 7.0 - man page for symlinkat (centos section 2)
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SYMLINKAT(2) Linux Programmer's Manual SYMLINKAT(2)NAME
symlinkat - create a symbolic link relative to a directory file descriptor
#include <fcntl.h> /* Definition of AT_* constants */
int symlinkat(const char *oldpath, int newdirfd, const char *newpath);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.10:
_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
The symlinkat() system call operates in exactly the same way as symlink(2), except for the
differences described in this manual page.
If the pathname given in newpath is relative, then it is interpreted relative to the
directory referred to by the file descriptor newdirfd (rather than relative to the current
working directory of the calling process, as is done by symlink(2) for a relative path-
If newpath is relative and newdirfd is the special value AT_FDCWD, then newpath is inter-
preted relative to the current working directory of the calling process (like symlink(2)).
If newpath is absolute, then newdirfd is ignored.
On success, symlinkat() returns 0. On error, -1 is returned and errno is set to indicate
The same errors that occur for symlink(2) can also occur for symlinkat(). The following
additional errors can occur for symlinkat():
EBADF newdirfd is not a valid file descriptor.
newpath is relative and newdirfd is a file descriptor referring to a file other
than a directory.
symlinkat() was added to Linux in kernel 2.6.16; library support was added to glibc in
See openat(2) for an explanation of the need for symlinkat().
SEE ALSOopenat(2), symlink(2), path_resolution(7), symlink(7)COLOPHON
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Linux 2012-05-04 SYMLINKAT(2)