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/* $Id$
Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2009, University of Amsterdam
This 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.
This 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 this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "pl-incl.h"
#ifndef MAXVARNAME
#define MAXVARNAME 1024
#endif
/** shell(+Command:text, -Status:integer) is det.
Run an external command and wait for its completion.
*/
static
PRED_IMPL("shell", 2, shell, 0)
{ GET_LD
char *cmd;
if ( PL_get_chars_ex(A1, &cmd, CVT_ALL|REP_FN) )
{ int rval = System(cmd);
return PL_unify_integer(A2, rval);
}
fail;
}
word
pl_getenv(term_t var, term_t value)
{ char *n;
if ( PL_get_chars_ex(var, &n, CVT_ALL|REP_FN) )
{ char buf[1024];
size_t size;
if ( (size=getenv3(n, buf, sizeof(buf))) != (size_t)-1 )
{ if ( size < sizeof(buf) )
{ return PL_unify_chars(value, PL_ATOM|REP_FN, size, buf);
} else
{ char *buf = PL_malloc(size+1);
int rc;
size = getenv3(n, buf, size+1);
if ( size > 0 )
rc = PL_unify_chars(value, PL_ATOM|REP_FN, size, buf);
else
rc = FALSE;
PL_free(buf);
return rc;
}
}
fail;
}
fail;
}
word
pl_setenv(term_t var, term_t value)
{ char *n, *v;
if ( PL_get_chars_ex(var, &n, CVT_ALL|REP_FN|BUF_RING) &&
PL_get_chars_ex(value, &v, CVT_ALL|REP_FN) )
return Setenv(n, v);
fail;
}
word
pl_unsetenv(term_t var)
{ char *n;
if ( PL_get_chars_ex(var, &n, CVT_ALL|REP_FN) )
return Unsetenv(n);
fail;
}
word
pl_get_time(term_t t)
{ return PL_unify_float(t, WallTime());
}
word
pl_sleep(term_t time)
{ double t;
if ( PL_get_float_ex(time, &t) )
return Pause(t);
fail;
}
#ifdef __WINDOWS__
#include <process.h>
#endif
word
pl_get_pid(term_t pid)
{ GET_LD
return PL_unify_integer(pid, getpid());
}
/*******************************
* PUBLISH PREDICATES *
*******************************/
BeginPredDefs(system)
PRED_DEF("shell", 2, shell, 0)
EndPredDefs
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