From: Karel Zak <kzak@redhat.com>
Date: Thu, 27 Oct 2011 22:23:59 +0000 (+0200)
Subject: prlimit: add add falbacks
X-Git-Tag: v2.21-rc1~227
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=945ac25080493126d094731510b85bc2d90a1170;p=thirdparty%2Futil-linux.git

prlimit: add add falbacks

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

diff --git a/configure.ac b/configure.ac
index 36dffc7276..49de07d982 100644
--- a/configure.ac
+++ b/configure.ac
@@ -854,6 +854,15 @@ UL_REQUIRES_HAVE([chcpu], [cpu_set_t], [cpu_set_t type])
 AM_CONDITIONAL(BUILD_CHCPU, test "x$build_chcpu" = xyes)
 
 
+UL_BUILD_INIT([prlimit], [check])
+UL_REQUIRES_LINUX([prlimit])
+UL_REQUIRES_SYSCALL_CHECK([prlimit], [UL_CHECK_SYSCALL([prlimit64])], [prlimit64])
+AM_CONDITIONAL(BUILD_PRLIMIT, test "x$build_prlimit" = xyes)
+if test "x$build_prlimit" = xyes; then
+  AC_CHECK_FUNCS([prlimit])
+fi
+
+
 AC_ARG_ENABLE([switch_root],
   AS_HELP_STRING([--disable-switch_root], [do not build switch_root]),
   [], enable_switch_root=check
diff --git a/sys-utils/prlimit.c b/sys-utils/prlimit.c
index 74c7fc98e2..2c7e6635e5 100644
--- a/sys-utils/prlimit.c
+++ b/sys-utils/prlimit.c
@@ -33,6 +33,10 @@
 #include "xalloc.h"
 #include "strutils.h"
 
+#ifndef RLIMIT_RTTIME
+# define RLIMIT_RTTIME 15
+#endif
+
 enum {
 	AS,
 	CORE,
@@ -123,6 +127,16 @@ static int columns[NCOLS], ncolumns;
 static pid_t pid; /* calling process (default) */
 static int verbose;
 
+#ifndef HAVE_PRLIMIT
+# include <sys/syscall.h>
+static int prlimit(pid_t p, int resource,
+		   const struct rlimit *new_limit,
+		   struct rlimit *old_limit)
+{
+	return syscall(SYS_prlimit, p, resource, new_limit, old_limit);
+}
+#endif
+
 static void __attribute__ ((__noreturn__)) usage(FILE * out)
 {
 	size_t i;