Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

System Functions (r) readlink(2)
• The current working directory is assigned from the VOLUME attribute of the Guardian
environment =_DEFAULTS DEFINE.
• The use of static memory by the process increases slightly.
These effects occur only when the first of the set of functions is called. The effects are not cumu-
lative.
NOTES
On systems running H06.24 or later H-series RVUs or J06.13 or later J-series RVUs, you can use
this function with 32-bit or 64-bit OSS applications.
RETURN VALUES
Upon successful completion, the readlink( ) function returns the number of characters placed in
the buffer (not including any terminating null). If the readlink( ) function fails, the buffer is not
modified, the value -1 is returned, and errno is set to indicate the error.
ERRORS
If any of the following conditions occurs, the readlink( ) function sets errno to the correspond-
ing value:
[EACCES] Search permission is denied on a component of the pathname prefix of the path
parameter.
[EFAULT] The path parameter points outside the process’s allocated address space.
[EFSBAD] The fileset catalog for one of the filesets involved in the operation is corrupt.
[EINVAL] The file named by the path parameter is not a symbolic link.
[EIO] An I/O error occurred during a read from or write to the fileset.
[ELOOP] There were too many links encountered in translating path.
[ENAMETOOLONG]
One of the following is too long:
• The pathname pointed to by the path parameter
• A component of the pathname pointed to by the path parameter
• The intermediate result of pathname resolution when a symbolic link is
part of the path parameter
The pathconf( ) function can be called to obtain the applicable limits.
[ENOENT] One of the following conditions exists:
• The file named by the path parameter does not exist.
• The path parameter points to an empty string.
• The path parameter specifies a file on a remote HP NonStop node but
communication with the remote node has been lost.
[ENOROOT] The root fileset (fileset 0) is not in the STARTED state.
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