Libc-1353.11.2.tar.gz

[apple/libc.git] / gen / FreeBSD / nice.c

diff --git a/gen/FreeBSD/nice.c b/gen/FreeBSD/nice.c
index 453caa762c3550afc57c0be99668265dece81bdf..962eee10bc7f4baaa32d5c2c678e7d102980c75b 100644 (file)
--- a/gen/FreeBSD/nice.c
+++ b/gen/FreeBSD/nice.c
@@ -10,10 +10,6 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -35,14 +31,16 @@
 static char sccsid[] = "@(#)nice.c     8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/nice.c,v 1.3 2002/03/22 21:52:05 obrien Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/gen/nice.c,v 1.4 2007/01/09 00:27:54 imp Exp $");
 
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <errno.h>
 #include <unistd.h>
-
+#if __DARWIN_UNIX03
+#include <limits.h>
+#endif /* __DARWIN_UNIX03 */
 /*
  * Backwards compatible nice.
  */
@@ -50,11 +48,18 @@ int
 nice(incr)
        int incr;
 {
-       int prio;
+       int prio, rv;
 
        errno = 0;
        prio = getpriority(PRIO_PROCESS, 0);
        if (prio == -1 && errno)
                return (-1);
-       return (setpriority(PRIO_PROCESS, 0, prio + incr));
+#if __DARWIN_UNIX03
+       if (prio + incr > NZERO-1)
+               incr = NZERO-1-prio;
+#endif /* __DARWIN_UNIX03 */
+       rv = setpriority(PRIO_PROCESS, 0, prio + incr);
+       if (rv == -1 && errno == EACCES)
+               errno = EPERM;
+       return (rv == -1) ? rv : getpriority(PRIO_PROCESS, 0);
 }