mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-20 17:51:16 +00:00
a4fe3ea608
* sysdeps/unix/bsd/ulimit.c (ulimit): Handle overflow in UL_SETFSIZE computations better.
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* Copyright (C) 1991, 92, 94, 96, 97, 98, 2001 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <sysdep.h>
|
|
#include <ulimit.h>
|
|
#include <unistd.h>
|
|
#include <sys/resource.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
|
|
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 / 512;
|
|
break;
|
|
|
|
case UL_SETFSIZE:
|
|
/* Set limit on file size. */
|
|
{
|
|
long int newlimit = va_arg (va, long int);
|
|
|
|
if ((rlim_t) newlimit > RLIM_INFINITY / 512)
|
|
{
|
|
limit.rlim_cur = RLIM_INFINITY;
|
|
limit.rlim_max = RLIM_INFINITY;
|
|
}
|
|
else
|
|
{
|
|
limit.rlim_cur = newlimit * 512;
|
|
limit.rlim_max = newlimit * 512;
|
|
}
|
|
|
|
result = setrlimit (RLIMIT_FSIZE, &limit);
|
|
}
|
|
break;
|
|
|
|
case __UL_GETMAXBRK:
|
|
/* Get maximum address for `brk'. */
|
|
if (getrlimit (RLIMIT_DATA, &limit) == 0)
|
|
result = ((long int) &_etext) + limit.rlim_cur;
|
|
break;
|
|
|
|
case __UL_GETOPENMAX:
|
|
result = sysconf (_SC_OPEN_MAX);
|
|
break;
|
|
|
|
default:
|
|
__set_errno (EINVAL);
|
|
}
|
|
|
|
va_end (va);
|
|
|
|
return result;
|
|
}
|