summaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/getpriority.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/getpriority.c')
-rw-r--r--sysdeps/unix/sysv/linux/getpriority.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/getpriority.c b/sysdeps/unix/sysv/linux/getpriority.c
new file mode 100644
index 0000000000..6dd56cce8b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/getpriority.c
@@ -0,0 +1,42 @@
+/* getpriority for Linux.
+Copyright (C) 1996 Free Software Foundation, Inc.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <sys/resource.h>
+
+extern int __syscall_getpriority (int, int);
+
+/* The return value of __syscall_getpriority is biased by this value
+ to avoid returning negative values. */
+#define PZERO 20
+
+/* Return the highest priority of any process specified by WHICH and WHO
+ (see above); if WHO is zero, the current process, process group, or user
+ (as specified by WHO) is used. A lower priority number means higher
+ priority. Priorities range from PRIO_MIN to PRIO_MAX. */
+
+int
+getpriority (enum __priority_which which, int who)
+{
+ int res;
+
+ res = __syscall_getpriority ((int) which, who);
+ if (res >= 0)
+ res = PZERO - res;
+ return res;
+}