schedutils: define SCHED_BATCH when compile with old glibc

This is temporary workaround and it will be removed in 2.14 when
minimal number of people will use old systems where is not defined
SCHED_BATCH in (bits/)sched.h.

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/TODO b/TODO
index a436087516c5eb8d4e2dda63fe0fd50aa60a18d1..f9efbb0f87352d62db133344d4b064dea912c18c 100644 (file)
--- a/TODO
+++ b/TODO
@@ -30,3 +30,6 @@
 
 - rewrite ipcs to use /proc/sys/kernel rather than unreliable syscalls
   (there are problems with 32bit userspace on 64bit kernel)
+
+- remove support for old system headers (like missing ioctls, ..)
+        * check for SCHED_BATCH in the configure script

diff --git a/schedutils/chrt.1 b/schedutils/chrt.1
index 9ffc084b5e6e689f1e2a468154299d0978291b81..f6db1cbe3cf7a4ea50a525a72744acf4a5741914 100644 (file)
--- a/schedutils/chrt.1
+++ b/schedutils/chrt.1
@@ -42,12 +42,14 @@ runs COMMAND with the given attributes.  Both policy (one of
 or
 .BR SCHED_BATCH )
 and priority can be set and retrieved.
+.PP
+The
+.BR SCHED_BATCH
+policy is supported since Linux 2.6.16.
 .SH OPTIONS
 .TP
 .B -p, --pid
 operate on an existing PID and do not launch a new task
-.TP
-
 .TP
 .B -b, --batch
 set scheduling policy to

diff --git a/schedutils/chrt.c b/schedutils/chrt.c
index 4c190a82d3461d1be699740b72ae1c36d7f12ae2..02ff3809c07a69677f4cb548839ddabd596c3587 100644 (file)
--- a/schedutils/chrt.c
+++ b/schedutils/chrt.c
@@ -30,6 +30,13 @@
 #include <getopt.h>
 #include <errno.h>
 
+/* the SCHED_BATCH is supported since Linux 2.6.16
+ *  -- temporary workaround for people with old glibc headers
+ */
+#ifndef SCHED_BATCH
+# define SCHED_BATCH 3
+#endif
+
 static void show_usage(const char *cmd)
 {
        fprintf(stderr, "chrt (%s)\n", PACKAGE_STRING);