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[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / setrlimit.c

diff --git a/sysdeps/unix/sysv/linux/setrlimit.c b/sysdeps/unix/sysv/linux/setrlimit.c
index 43bfdbbbc42e16787b23fca415daa0dbd20c1ee9..8b7b33ec4a7ed86aaa8d3cebb11c69be503a99f0 100644 (file)
--- a/sysdeps/unix/sysv/linux/setrlimit.c
+++ b/sysdeps/unix/sysv/linux/setrlimit.c
@@ -1,78 +1,60 @@
-/* Copyright (C) 1999 Free Software Foundation, Inc.
+/* Linux setrlimit implementation (32 bits off_t).
+   Copyright (C) 2016-2019 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.
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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.
+   Lesser 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.  */
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
-#include <sys/param.h>
 #include <sys/resource.h>
+#include <sys/types.h>
+#include <shlib-compat.h>
 
-#include <sysdep.h>
-#include <sys/syscall.h>
+#if !__RLIM_T_MATCHES_RLIM64_T
 
-#include "kernel-features.h"
-
-extern int __syscall_setrlimit (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.  */
-#if !defined __ASSUME_NEW_GETRLIMIT_SYSCALL && defined __NR_ugetrlimit
-static int no_new_getrlimit;
-#else
-# define no_new_getrlimit      0
-#endif
+/* The compatibility symbol is meant to match the old __NR_getrlimit syscall
+   (with broken RLIM_INFINITY definition).  It should be provided iff
+   __NR_getrlimit and __NR_ugetrlimit are both defined.  */
+# ifndef __NR_ugetrlimit
+#  undef SHLIB_COMPAT
+#  define SHLIB_COMPAT(a, b, c) 0
+# endif
 
 int
-__setrlimit (resource, rlimits)
-     enum __rlimit_resource resource;
-     const struct rlimit *rlimits;
+__setrlimit (enum __rlimit_resource resource, const struct rlimit *rlim)
 {
-#ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
-  struct rlimit rlimits_small;
-#endif
-
-#ifdef __NR_ugetrlimit
-  if (! no_new_getrlimit)
-    {
-      int result = INLINE_SYSCALL (setrlimit, 2, resource, rlimits);
-
-# ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
-      /* If the system call is available return.  */
-      if (result != -1 || errno != ENOSYS)
-# endif
-       return result;
+  struct rlimit64 rlim64;
+
+  if (rlim->rlim_cur == RLIM_INFINITY)
+    rlim64.rlim_cur = RLIM64_INFINITY;
+  else
+    rlim64.rlim_cur = rlim->rlim_cur;
+  if (rlim->rlim_max == RLIM_INFINITY)
+    rlim64.rlim_max = RLIM64_INFINITY;
+  else
+    rlim64.rlim_max = rlim->rlim_max;
+
+  return INLINE_SYSCALL_CALL (prlimit64, 0, resource, &rlim64, NULL);
+}
 
-# ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
-      /* Remember that the system call is not available.  */
-      no_new_getrlimit = 1;
+libc_hidden_def (__setrlimit)
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
+strong_alias (__setrlimit, __setrlimit_1)
+compat_symbol (libc, __setrlimit, setrlimit, GLIBC_2_0);
+versioned_symbol (libc, __setrlimit_1, setrlimit, GLIBC_2_2);
+# else
+weak_alias (__setrlimit, setrlimit)
 # endif
-    }
-#endif
-
-#ifndef __ASSUME_NEW_GETRLIMIT_SYSCALL
-  /* We might have to correct the limits values.  Since the old values
-     were signed the new values are too large.  */
-  rlimits_small.rlim_cur = MIN ((unsigned long int) rlimits->rlim_cur,
-                               RLIM_INFINITY >> 2);
-  rlimits_small.rlim_max = MIN ((unsigned long int) rlimits->rlim_max,
-                               RLIM_INFINITY >> 2);
 
-  /* Fall back on the old system call.  */
-  return INLINE_SYSCALL (setrlimit, 2, resource, &rlimits_small);
-#endif
-}
-weak_alias (__setrlimit, setrlimit)
+#endif /* __RLIM_T_MATCHES_RLIM64_T  */