1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1990-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                                                                      *
19***********************************************************************/
20#pragma prototyped
21/*
22 * Glenn Fowler
23 * AT&T Research
24 *
25 * coshell system(3)
26 */
27
28#include "colib.h"
29
30int
31cosystem(const char* cmd)
32{
33	Coshell_t*	co;
34	Cojob_t*	cj;
35	int		status;
36
37	if (!cmd)
38		return !eaccess(pathshell(), X_OK);
39	if (!(co = coopen(NiL, CO_ANY, NiL)))
40		return -1;
41	if (cj = coexec(co, cmd, CO_SILENT, NiL, NiL, NiL))
42		cj = cowait(co, cj, -1);
43	if (!cj)
44		return -1;
45
46	/*
47	 * synthesize wait() status from shell status
48	 * lack of synthesis is the standard's proprietary sellout
49	 */
50
51	status = cj->status;
52	if (EXITED_TERM(status))
53		status &= ((1<<(EXIT_BITS-1))-1);
54	else
55		status = (status & ((1<<EXIT_BITS)-1)) << EXIT_BITS;
56	return status;
57}
58