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- /*
- * umask.c --
- *
- * Procedure to map from Unix umask system call to Sprite.
- *
- * Copyright 1986 Regents of the University of California
- * All rights reserved.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: umask.c,v 1.1 88/06/19 14:32:09 ouster Exp $ SPRITE (Berkeley)";
- #endif not lint
-
- #include "sprite.h"
- #include "fs.h"
-
- #include "compatInt.h"
-
- /*
- * These are the bits to invert and pass to the Sprite system call.
- */
-
- #define PERMISSION_MASK 0777
-
-
- /*
- *----------------------------------------------------------------------
- *
- * umask --
- *
- * Procedure to map from Unix umask system call to Sprite
- * Fs_SetDefPerm.
- *
- * Results:
- * On success, the former value of umask is returned. If
- * Fs_SetDefPerm returns an error, UNIX_ERROR is returned and the
- * actual error code is stored in errno.
- *
- * Side effects:
- * The default protection of files created by the current process
- * is changed.
- *
- *----------------------------------------------------------------------
- */
-
- int
- umask(newMask)
- int newMask;
- {
- ReturnStatus status; /* result returned by Fs_SetDefPerm */
- int oldMask;
-
- /*
- * Sprite default permissions are the logical NOT of Unix permissions.
- */
-
- newMask = (~newMask) & PERMISSION_MASK;
-
- status = Fs_SetDefPerm(newMask, &oldMask);
- if (status != SUCCESS) {
- errno = Compat_MapCode(status);
- return(UNIX_ERROR);
- } else {
- oldMask = (~oldMask) & PERMISSION_MASK;
- return(oldMask);
- }
- }
-