Open System Services System Calls Reference Manual (G06.25+, H06.03+)

System Functions (a - d) chown(2)
The _POSIX_CHOWN_RESTRICTED
feature is ignored for files in the Guardian file system
(that is, for files in /G).
Use From the Guardian Environment
The chown() function is one of a set of functions that have these effects when the first of them is
called from the Guardian environment:
• Two Guardian file system file numbers (not necessarily the next two available) are allo-
cated for the root directory and the current working directory. These file numbers cannot
be closed by calling the Guardian FILE_CLOSE_ procedure.
• 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.
RETURN VALUES
Upon successful completion, the chown() function returns the value 0 (zero). Otherwise, the
value -1 is returned, the owner and group of the file remain unchanged, and errno is set to indi-
cate the error.
ERRORS
If these conditions occurs, the chown() function sets errno to the corresponding value:
[EACCES] Search permission is denied on a component of the path parameter.
[EFAULT] The path parameter is an invalid address.
[EFSBAD] The fileset catalog for one of the filesets involved in the operation is corrupt.
[EINVAL] The owner or group parameter is out of range.
An attempt was made to change ownership of a Guardian file that is not a disk
file.
[EIO] An input or output error occurred. The device holding the file might be in the
down state, or both processors that provide access to the device might have
failed.
[ELOOP] Too many links were encountered in translating the path parameter.
[ENAMETOOLONG]
One of these 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 these is true:
• The path parameter does not exist.
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