From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 2 Dec 1999 08:26:36 +0000 (+0000)
Subject: Linux getrlimit implementation.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cecc40e1b71e551b428f6c264e907a9e74fe2482;p=thirdparty%2Fglibc.git

Linux getrlimit implementation.
---

diff --git a/sysdeps/unix/sysv/linux/getrlimit.c b/sysdeps/unix/sysv/linux/getrlimit.c
new file mode 100644
index 00000000000..878720a7bfc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/getrlimit.c
@@ -0,0 +1,81 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+extern int __syscall_ugetrlimit __P ((unsigned int resource,
+				      struct rlimit *rlimits));
+extern int __syscall_getrlimit __P ((unsigned int resource,
+				     struct rlimit *rlimits));
+
+/* Linux 2.3.25 introduced a new system call since the types used for
+   the limits are now unsigned.  */
+#ifdef __NR_ugetrlimit
+int __have_no_new_getrlimit;
+#endif
+
+int
+__new_getrlimit (enum __rlimit_resource resource, struct rlimit *rlimits)
+{
+  int result;
+
+#ifdef __NR_ugetrlimit
+  if (__have_no_new_getrlimit <= 0)
+    {
+      result = INLINE_SYSCALL (ugetrlimit, 2, resource, rlimits);
+
+      /* If the system call is available remember this fact and return.  */
+      if (result != -1 || errno != ENOSYS)
+	{
+	  __have_no_new_getrlimit = -1;
+	  return result;
+	}
+
+      /* Remember that the system call is not available.  */
+      __have_no_new_getrlimit = 1;
+    }
+#endif
+
+  /* Fall back to the old system call.  */
+  result = INLINE_SYSCALL (getrlimit, 2, resource, rlimits);
+
+  if (result == -1)
+    return result;
+
+  /* We might have to correct the limits values.  Since the old values
+     were signed the infinity value is too small.  */
+  if (rlimits->rlim_cur == RLIM_INFINITY >> 1)
+    rlimits->rlim_cur = RLIM_INFINITY;
+  if (rlimits->rlim_max == RLIM_INFINITY >> 1)
+    rlimits->rlim_max = RLIM_INFINITY;
+
+  return result;
+}
+
+#if defined PIC && DO_VERSIONING
+default_symbol_version (__new_getrlimit, __getrlimit, GLIBC_2.1.3);
+strong_alias (__new_getrlimit, _new_getrlimit);
+default_symbol_version (_new_getrlimit, getrlimit, GLIBC_2.1.3);
+#else
+weak_alias (__new_getrlimit, __getrlimit);
+weak_alias (__new_getrlimit, getrlimit);
+#endif