UMASK(2) | System Calls Manual | UMASK(2) |
umask
—
#include <sys/stat.h>
mode_t
umask
(mode_t
numask);
umask
() routine sets the process's file mode
creation mask to numask and returns the previous value
of the mask. The 9 low-order access permission bits of
numask are used by system calls, including
open(2),
mkdir(2),
mkfifo(2) and
mknod(2) to turn off
corresponding bits requested in file mode. (See
chmod(2)). This clearing allows
each user to restrict the default access to his files.
The default mask value is S_IWGRP|S_IWOTH (022, write access for the owner only). Child processes inherit the mask of the calling process.
umask
() function is always successful.
umask
() function conforms to IEEE
Std 1003.1-1990 (“POSIX.1”).
June 4, 1993 | NetBSD 9.0 |