ulimit: move linux implementation as posix

The linux implementation of ulimit works correctly and has nothing specific
to Linux, so move it as general posix implementation.

1 files changed, 91 insertions, 0 deletions

diff --git a/sysdeps/posix/ulimit.c b/sysdeps/posix/ulimit.c
new file mode 100644
index 0000000000..8c382ac18f
--- /dev/null
+++ b/sysdeps/posix/ulimit.c
@@ -0,0 +1,91 @@
+/* Copyright (C) 1991-2013 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 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <sysdep.h>
+#include <ulimit.h>
+#include <unistd.h>
+#include <sys/resource.h>
+
+/* Function depends on CMD:
+   1 = Return the limit on the size of a file, in units of 512 bytes.
+   2 = Set the limit on the size of a file to NEWLIMIT.  Only the
+       super-user can increase the limit.
+   3 = illegal due to shared libraries; normally is
+       (Return the maximum possible address of the data segment.)
+   4 = Return the maximum number of files that the calling process
+       can open.
+   Returns -1 on errors.  */
+long int
+__ulimit (int cmd, ...)
+{
+  struct rlimit limit;
+  va_list va;
+  long int result = -1;
+
+  va_start (va, cmd);
+
+  switch (cmd)
+    {
+    case UL_GETFSIZE:
+      /* Get limit on file size.  */
+      if (__getrlimit (RLIMIT_FSIZE, &limit) == 0)
+	/* Convert from bytes to 512 byte units.  */
+	result =  (limit.rlim_cur == RLIM_INFINITY
+		   ? LONG_MAX : limit.rlim_cur / 512);
+      break;
+
+    case UL_SETFSIZE:
+      /* Set limit on file size.  */
+      {
+	long int newlimit = va_arg (va, long int);
+	long int newlen;
+
+	if ((rlim_t) newlimit > RLIM_INFINITY / 512)
+	  {
+	    limit.rlim_cur = RLIM_INFINITY;
+	    limit.rlim_max = RLIM_INFINITY;
+	    newlen = LONG_MAX;
+	  }
+	else
+	  {
+	    limit.rlim_cur = newlimit * 512;
+	    limit.rlim_max = newlimit * 512;
+	    newlen = newlimit;
+	  }
+
+	result = __setrlimit (RLIMIT_FSIZE, &limit);
+	if (result != -1)
+	  result = newlen;
+      }
+      break;
+
+    case __UL_GETOPENMAX:
+      result = __sysconf (_SC_OPEN_MAX);
+      break;
+
+    default:
+      __set_errno (EINVAL);
+    }
+
+  va_end (va);
+
+  return result;
+}
+
+weak_alias (__ulimit, ulimit);