File permission constants

Syntax

#include <sys/stat.h>

One of these constants is required when _O_CREAT (_open, _sopen) is specified.

The pmode argument specifies the file's permission settings as follows.

Constant	Meaning
`_S_IREAD`	Reading permitted
`_S_IWRITE`	Writing permitted
`_S_IREAD \| _S_IWRITE`	Reading and writing permitted

When used as the pmode argument for _umask, the manifest constant sets the permission setting, as follows.

Constant	Meaning
`_S_IREAD`	Writing not permitted (file is read-only)
`_S_IWRITE`	Reading not permitted (file is write-only)
`_S_IREAD \| _S_IWRITE`	Both reading and writing not permitted