umask(2) manual page
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umask - set and get file creation mask
#include <sys/types.h>
#include <sys/stat.h>
mode_t umask(mode_t cmask);
Async-Signal-Safe
umask()
sets the process’s file mode creation mask to cmask and returns the previous
value of the mask. Only the access permission bits of cmask and the file
mode creation mask are used.
The mask is inherited by child processes.
See
intro(2)
for more information on masks.
The previous value
of the file mode creation mask is returned.
mkdir(1)
, sh(1)
, intro(2)
,
chmod(2)
, creat(2)
, mknod(2)
, open(2)
, stat(5)
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