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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/unix/bsd/ulimit.c
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Diffstat (limited to 'sysdeps/unix/bsd/ulimit.c')
-rw-r--r--sysdeps/unix/bsd/ulimit.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/ulimit.c b/sysdeps/unix/bsd/ulimit.c
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+/* Copyright (C) 1991, 1992, 1994 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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <sysdep.h>
+#include <sys/resource.h>
+#include <unistd.h>
+#include <errno.h>
+
+#ifndef HAVE_GNU_LD
+#define _etext etext
+#endif
+
+extern int _etext;
+
+/* 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 = 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
+DEFUN(ulimit, (cmd, newlimit),
+ int cmd AND long int newlimit)
+{
+ int status;
+
+ switch (cmd)
+ {
+ case 1:
+ {
+ /* Get limit on file size. */
+ struct rlimit fsize;
+
+ status = getrlimit(RLIMIT_FSIZE, &fsize);
+ if (status < 0)
+ return -1;
+
+ /* Convert from bytes to 512 byte units. */
+ return fsize.rlim_cur / 512;
+ }
+ case 2:
+ /* Set limit on file size. */
+ {
+ struct rlimit fsize;
+ fsize.rlim_cur = newlimit * 512;
+ fsize.rlim_max = newlimit * 512;
+
+ return setrlimit(RLIMIT_FSIZE, &fsize);
+ }
+ case 3:
+ /* Get maximum address for `brk'. */
+ {
+ struct rlimit dsize;
+
+ status = getrlimit(RLIMIT_DATA, &dsize);
+ if (status < 0)
+ return -1;
+
+ return ((long int) &_etext) + dsize.rlim_cur;
+ }
+ case 4:
+ return sysconf(_SC_OPEN_MAX);
+
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+}