UMASK(2-POSIX)      RISC/os Reference Manual       UMASK(2-POSIX)



NAME
     umask - set and get file creation mask

SYNOPSIS
     #include <sys/types.h>
     #include <sys/stat.h>

     modet umask (cmask)
     modet cmask;

DESCRIPTION
     umask sets the process's file mode creation mask to cmask
     and returns the previous value of the mask.  Only the file
     permission bits (see <sys/stat.h>) of cmask are used; the
     rest are discarded.

     The process' file mode creation mask is used during open,
     creat, mkdir, and mkfifo calls to turn off permision bits in
     the mode argument supplied.  Bit positions that are set in
     cmask are cleared in the mode of the created file.

SEE ALSO
     chmod(2), creat(2), mkfifo(2), mkdir(2), open(2).
     mkdir(1), sh(1) in the User's Reference Manual.

DIAGNOSTICS
     The previous value of the file mode creation mask is
     returned.



























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