Open System Services System Calls Reference Manual (G06.28+)

lstat(2) OSS System Calls Reference Manual
Use From the Guardian Environment
The lstat() function can be used by a Guardian process when the process has been compiled
using the #define _XOPEN_SOURCE_EXTENDED 1
feature test macro or an equivalent com-
piler command option.
The lstat() function belongs to a set of functions that have the following 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 value 0 (zero) is returned. Otherwise, the value -1 is returned
and errno is set to indicate the error.
ERRORS
If any of the following conditions occurs, the lstat() function sets errno to the corresponding
value:
[EACCES] Search permission is denied for a component of the pathname pointed to by the
path parameter.
[EFAULT] Either the buffer parameter or the path parameter points to a location outside of
the allocated address space of the process.
[EFSBAD] The program attempted an operation involving a fileset with a corrupted fileset
catalog.
[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 symbolic links were 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 specified by the path parameter does not exist.
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