Linux/i386 specific setrlimit implementation.

diff --git a/sysdeps/unix/sysv/linux/i386/setrlimit.c b/sysdeps/unix/sysv/linux/i386/setrlimit.c
new file mode 100644 (file)
index 0000000..1be563d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/setrlimit.c
@@ -0,0 +1,78 @@
+/* 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/param.h>
+#include <sys/resource.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+extern int __syscall_setrlimit (unsigned int resource,
+                               const struct rlimit *rlimits);
+extern int __syscall_ugetrlimit (unsigned int resource,
+                                const 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
+extern int __have_no_new_getrlimit;    /* In getrlimit.c.  */
+#endif
+
+int
+__new_setrlimit (enum __rlimit_resource resource, const struct rlimit *rlimits)
+{
+  struct rlimit rlimits_small;
+
+#ifdef __NR_ugetrlimit
+  if (__have_no_new_getrlimit == 0)
+    {
+      /* Check if the new ugetrlimit syscall exists.  We must do this
+        first because older kernels don't reject negative rlimit
+        values in setrlimit.  */
+      int result = INLINE_SYSCALL (ugetrlimit, 2, resource, &rlimits_small);
+      if (result != -1 || errno != ENOSYS)
+       /* The syscall exists.  */
+       __have_no_new_getrlimit = -1;
+      else
+       /* The syscall does not exist.  */
+       __have_no_new_getrlimit = 1;
+    }
+  if (__have_no_new_getrlimit < 0)
+    return INLINE_SYSCALL (setrlimit, 2, resource, rlimits);
+#endif
+
+  /* We might have to correct the limits values.  Since the old values
+     were signed the new values might be too large.  */
+  rlimits_small.rlim_cur = MIN ((unsigned long int) rlimits->rlim_cur,
+                               RLIM_INFINITY >> 1);
+  rlimits_small.rlim_max = MIN ((unsigned long int) rlimits->rlim_max,
+                               RLIM_INFINITY >> 1);
+
+  /* Use the adjusted values.  */
+  return INLINE_SYSCALL (setrlimit, 2, resource, &rlimits_small);
+}
+
+#if defined PIC && DO_VERSIONING
+default_symbol_version (__new_setrlimit, __setrlimit, GLIBC_2.1.3);
+strong_alias (__new_setrlimit, _new_setrlimit);
+default_symbol_version (_new_setrlimit, setrlimit, GLIBC_2.1.3);
+#else
+weak_alias (__new_setrlimit, __setrlimit);
+weak_alias (__new_setrlimit, setrlimit);
+#endif