mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 11:41:07 +00:00
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* Copyright (C) 1991-2014 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 <limits.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);
|