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BSD 2.11 - man page for readlink (bsd section 2)

READLINK(2)					 System Calls Manual					  READLINK(2)

NAME
readlink - read value of a symbolic link
SYNOPSIS
cc = readlink(path, buf, bufsiz) int cc; char *path, *buf; int bufsiz;
DESCRIPTION
Readlink places the contents of the symbolic link name in the buffer buf, which has size bufsiz. The contents of the link are not null terminated when returned.
RETURN VALUE
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.
ERRORS
Readlink will fail and the file mode will be unchanged if: [ENOTDIR] A component of the path prefix is not a directory. [EINVAL] The pathname contains a character with the high-order bit set. [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 charac- ters. [ENOENT] The named file does not exist. [EACCES] Search permission is denied for a component of the path prefix. [ELOOP] Too many symbolic links were encountered in translating the pathname. [EINVAL] The named file is not a symbolic link. [EIO] An I/O error occurred while reading from the file system. [EFAULT] Buf extends outside the process's allocated address space.
SEE ALSO
stat(2), lstat(2), symlink(2) 4.2 Berkeley Distribution August 26, 1985 READLINK(2)


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