readlink

OS/161 Reference Manual

Name

readlink - fetch symbolic link contents

Library

Standard C Library (libc, -lc)

Synopsis

#include <unistd.h>

int
readlink(const char *path, char *buf, size_t len);

Description

readlink retrieves the contents of the symbolic link named by path and places them in the buffer buf. At most len bytes are written.

readlink does not include a null terminator in buf.

Return Values

readlink returns the number of characters transferred. If an error occurs, -1 is returned, and errno is set according to the error encountered.

Errors

The following error codes should be returned under the conditions given. Other error codes may be returned for other errors not mentioned here.
  
ENODEV The device prefix of filename did not exist.
ENOTDIR A non-final component of path was not a directory.
ENOENT The named file does not exist.
EINVAL The named file is not a symlink.
EIO A hard I/O error occurred.
EFAULT buf or path points to an invalid address.