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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (c) 2002-2014, University of Amsterdam
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <SWI-Prolog.h>
#include "clib.h"
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Provide an interface to the Unix system resources (getrlimit()/setrlimit()).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#if !defined(RLIMIT_NOFILE) && defined(RLIMIT_OFILE)
#define RLIMIT_NOFILE RLIMIT_OFILE
#endif
foreign_t
pl_rlimit(term_t what, term_t old, term_t new)
{ char *s;
int resource;
struct rlimit rlim;
if ( PL_get_atom_chars(what, &s) )
{ if ( strcmp(s, "cpu") == 0 )
resource = RLIMIT_CPU;
else if ( strcmp(s, "fsize") == 0 )
resource = RLIMIT_FSIZE;
else if ( strcmp(s, "data") == 0 )
resource = RLIMIT_DATA;
else if ( strcmp(s, "stack") == 0 )
resource = RLIMIT_STACK;
else if ( strcmp(s, "core") == 0 )
resource = RLIMIT_CORE;
#ifdef RLIMIT_RSS
else if ( strcmp(s, "rss") == 0 )
resource = RLIMIT_RSS;
#endif
#ifdef RLIMIT_AS
else if ( strcmp(s, "as") == 0 )
resource = RLIMIT_AS;
#endif
#ifdef RLIMIT_MEMLOCK
else if ( strcmp(s, "memlock") == 0 )
resource = RLIMIT_MEMLOCK;
#endif
#ifdef RLIMIT_NPROC
else if ( strcmp(s, "nproc") == 0 )
resource = RLIMIT_NPROC;
#endif
#ifdef RLIMIT_NOFILE
else if ( strcmp(s, "nofile") == 0 )
resource = RLIMIT_NOFILE;
#endif
else
return pl_error("rlimit", 3, NULL, ERR_DOMAIN,
what, "resource");
} else
return pl_error("rlimit", 3, NULL, ERR_TYPE,
what, "atom");
if ( getrlimit(resource, &rlim) == 0 )
{ int rval;
if ( rlim.rlim_cur == RLIM_INFINITY )
rval = PL_unify_atom_chars(old, "unlimited");
else
rval = PL_unify_int64(old, rlim.rlim_cur);
if ( rval )
{ int64_t n;
if ( PL_get_int64(new, &n) )
{
set:
if ( rlim.rlim_cur != (rlim_t) n )
{ rlim.rlim_cur = n;
if ( setrlimit(resource, &rlim) != 0 )
return pl_error("rlimit", 3, NULL, ERR_ERRNO, errno, "set", "resource_limit", what);
}
return TRUE;
} else if ( PL_get_atom_chars(new, &s) && strcmp(s, "unlimited") == 0 )
{ n = RLIM_INFINITY;
goto set;
} else
return pl_error("rlimit", 3, NULL, ERR_TYPE,
new, "integer_or_unlimited");
} else
return FALSE;
} else
return pl_error("rlimit", 3, NULL, ERR_ERRNO, errno, "get", "resource_limit", what);
}
install_t
install_rlimit()
{ PL_register_foreign("rlimit", 3, pl_rlimit, 0);
}
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