From: Philip Homburg <philip@cs.vu.nl>
Date: Fri, 20 Oct 2006 14:10:53 +0000 (+0000)
Subject: Nice(3) implementation
X-Git-Tag: v3.1.3~169
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doxygen.png?a=commitdiff_plain;h=be928f01a564899f87ca237db6dc125557de90fa;p=minix.git

Nice(3) implementation
---

diff --git a/include/unistd.h b/include/unistd.h
index 0d6f780b5..2b1baafd7 100755
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -146,6 +146,7 @@ _PROTOTYPE( int unlink, (const char *_path)				);
 _PROTOTYPE( ssize_t write, (int _fd, const void *_buf, size_t _n)	);
 _PROTOTYPE( int truncate, (const char *_path, off_t _length)		);
 _PROTOTYPE( int ftruncate, (int _fd, off_t _length)			);
+_PROTOTYPE( int nice, (int _incr)					);
 
 /* Open Group Base Specifications Issue 6 (not complete) */
 _PROTOTYPE( int symlink, (const char *path1, const char *path2)		);
diff --git a/lib/posix/Makefile.in b/lib/posix/Makefile.in
index 7d6abc211..b3eec7cc5 100644
--- a/lib/posix/Makefile.in
+++ b/lib/posix/Makefile.in
@@ -102,6 +102,7 @@ libc_FILES=" \
 	getloadavg.c \
 	getopt.c \
 	gettimeofday.c \
+	nice.c \
 	priority.c \
 	usleep.c"
 
diff --git a/lib/posix/nice.c b/lib/posix/nice.c
new file mode 100644
index 000000000..4f750f926
--- /dev/null
+++ b/lib/posix/nice.c
@@ -0,0 +1,19 @@
+/*
+nice.c
+*/
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/resource.h>
+
+int nice(incr)
+int incr;
+{
+	int r;
+
+	errno= 0;
+	r= getpriority(PRIO_PROCESS, 0);
+	if (r == -1 && errno != 0)
+		return r;
+	return setpriority(PRIO_PROCESS, 0, r+incr);
+}