READLINK(2) MidnightBSD System Calls Manual READLINK(2)
readlink — read value of a symbolic link
Standard C Library (libc, −lc)
readlink(const char *path, char *buf, int bufsiz);
The 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 NUL character to buf.
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.
The 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.
lstat(2), stat(2), symlink(2), symlink(7)
The readlink() system call appeared in 4.2BSD.
MidnightBSD 0.3 June 4, 1993 MidnightBSD 0.3