|READLINK(2)||System Calls Manual||READLINK(2)|
LIBRARY¶Standard C Library (libc, -lc)
char *restrict path, char
*restrict buf, size_t
const char *restrict path, char
*restrict buf, size_t bufsize);
readlink() system call places the contents of the symbolic link path in the buffer buf, which has size bufsiz. The
readlink() system call does not append a
NULcharacter to buf.
readlinkat() system call is equivalent
readlink() except in the case where
path specifies a relative path. In this case the
symbolic link whose content is read relative to the directory associated
with the file descriptor fd instead of the current
working directory. If
readlinkat() is passed the
AT_FDCWD in the
fd parameter, the current working directory is used
and the behavior is identical to a call to
RETURN VALUES¶The call returns the count of characters placed in the buffer if it succeeds, or a -1 if an error occurs, placing the error code in the global variable errno.
readlink() system call will fail if:
- A component of the path prefix is not a directory.
- A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.
- The named file does not exist.
- Search permission is denied for a component of the path prefix.
- Too many symbolic links were encountered in translating the pathname.
- The named file is not a symbolic link.
- An I/O error occurred while reading from the file system.
- The buf argument extends outside the process's allocated address space.
In addition to the errors returned by the
may fail if:
SEE ALSO¶lstat(2), stat(2), symlink(2), symlink(7)
readlinkat() system call follows The Open Group Extended API Set 2 specification.
readlink() system call appeared in 4.2BSD. The
readlinkat() system call appeared in FreeBSD 8.0.
|April 10, 2008||Linux 4.9.0-9-amd64|