Example handle process priority in UNIX systems

chp6/nice.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+int main(void)
+{
+	int ret;
+	ret = nice(0);
+	printf("Current nice by nice function: %d\n", ret);
+	ret = getpriority(PRIO_PROCESS, 0);
+	printf("Current nice by getpriority function: %d\n", ret);
+	if (setpriority(PRIO_PROCESS, 0, 10) == -1) {
+		perror("setpriority");
+		return -1;
+	}
+	ret = getpriority(PRIO_PROCESS, 0);
+	printf("Current nice by getpriority function: %d\n", ret);
+	return 0;
+}