MirOS Manual: umask(2)

UMASK(2)                   BSD Programmer's Manual                    UMASK(2)


     umask - set file creation mode mask


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

     umask(mode_t numask);


     The 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 per-
     mission 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 the file mode (see chmod(2)). This clearing allows each user to res-
     trict the default access to his files.

     The default mask value is S_IWGRP|S_IWOTH (022, write access for the own-
     er only). Child processes inherit the mask of the calling process.


     The previous value of the file mode mask is returned by the call.


     The umask() function is always successful.


     chmod(2), mkdir(2), mkfifo(2), mknod(2), open(2)


     The umask() function call is expected to conform to IEEE Std 1003.1-1988

MirOS BSD #10-current            June 4, 1993                                1

Generated on 2017-04-03 16:26:17 by $MirOS: src/scripts/roff2htm,v 1.88 2017/01/29 00:51:06 tg Exp $

These manual pages and other documentation are copyrighted by their respective writers; their source is available at our CVSweb, AnonCVS, and other mirrors. The rest is Copyright © 2002–2017 The MirOS Project, Germany.
This product includes material provided by mirabilos.

This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report — diffs preferred.