HP-UX Reference (11i v1 00/12) - 2 System Calls (vol 5)
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man2/!!!intro.2
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r
readlink(2) readlink(2)
NAME
readlink() - read the contents of a symbolic link
SYNOPSIS
#include <unistd.h>
int readlink(
const char *path,
char *buf,
size_t bufsiz
);
DESCRIPTION
The readlink() function places the contents of the symbolic link referred to by path in the buffer buf
which has size bufsiz. If the number of bytes in the symbolic link is less than bufsiz, the contents of the
remainder of buf are unspecified.
RETURN VALUE
Upon successful completion, readlink() returns the count of bytes placed in the buffer. Otherwise, it
returns a value of −1, leaves the buffer unchanged, and sets
errno to indicate the error.
ERRORS
The
readlink() function will fail if:
[EACCES] Search permission is denied for a component of the path prefix of path.
[EINVAL] The path argument names a file that is not a symbolic link.
[EIO] An I/O error occurred while reading from the file system.
[ENOENT] A component of path does not name an existing file or path is an empty string.
[ELOOP] Too many symbolic links were encountered in resolving path.
[ENAMETOOLONG]
The length of path exceeds PATH_MAX, or a pathname component is longer than
NAME_MAX.
[ENOTDIR] A component of the path prefix is not a directory.
The readlink() function may fail if:
[EACCES] Read permission is denied for the directory.
[ENAMETOOLONG]
Pathname resolution of a symbolic link produced an intermediate result whose length
exceeds PATH_MAX.
APPLICATION USAGE
Portable applications should not assume that the returned contents of the symbolic link are null- ter-
minated.
SEE ALSO
stat(2), symlink(2), <unistd.h>.
CHANGE HISTORY
First released in Issue 4, Version 2.
HP-UX Release 11i: December 2000 − 1 − Section 2−−251
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