File Permission Constants

#include <sys/stat.h>

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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	Neither reading nor writing permitted