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OpenSolaris 2009.06 - man page for umask (opensolaris section 2)

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umask(2)				   System Calls 				 umask(2)

       umask - set and get file creation mask

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

       mode_t umask(mode_t cmask);

       The  umask() function 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.

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Interface Stability	     |Standard			   |
       |MT-Level		     |Async-Signal-Safe 	   |

       mkdir(1),  sh(1),  Intro(2),  chmod(2),	creat(2),   mknod(2),	open(2),   stat.h(3HEAD),
       attributes(5), standards(5)

SunOS 5.11				   28 Dec 1996					 umask(2)
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