1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2010 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*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23/*
24 * Glenn Fowler
25 * AT&T Research
26 *
27 * close a proc opened by procopen()
28 * otherwise exit() status of process is returned
29 */
30
31#include "proclib.h"
32
33#include <wait.h>
34
35int
36procclose(register Proc_t* p)
37{
38	int	pid;
39	int	flags = 0;
40	int	status = -1;
41
42	if (p)
43	{
44		if (p->rfd >= 0)
45			close(p->rfd);
46		if (p->wfd >= 0 && p->wfd != p->rfd)
47			close(p->wfd);
48		if (p->flags & PROC_ZOMBIE)
49		{
50			/*
51			 * process may leave a zombie behind
52			 * give it a chance to do that but
53			 * don't hang waiting for it
54			 */
55
56			flags |= WNOHANG;
57			sleep(1);
58		}
59		if (!(p->flags & PROC_FOREGROUND))
60			sigcritical(SIG_REG_EXEC|SIG_REG_PROC);
61		while ((pid = waitpid(p->pid, &status, flags)) == -1 && errno == EINTR);
62		if (pid != p->pid && (flags & WNOHANG))
63			status = 0;
64		if (!(p->flags & PROC_FOREGROUND))
65			sigcritical(0);
66		else
67		{
68			if (p->sigint != SIG_IGN)
69				signal(SIGINT, p->sigint);
70			if (p->sigquit != SIG_IGN)
71				signal(SIGQUIT, p->sigquit);
72#if defined(SIGCHLD)
73#if _lib_sigprocmask
74			sigprocmask(SIG_SETMASK, &p->mask, NiL);
75#else
76#if _lib_sigsetmask
77			sigsetmask(p->mask);
78#else
79			if (p->sigchld != SIG_DFL)
80				signal(SIGCHLD, p->sigchld);
81#endif
82#endif
83#endif
84		}
85		status = status == -1 ?
86			 EXIT_QUIT :
87			 WIFSIGNALED(status) ?
88			 EXIT_TERM(WTERMSIG(status)) :
89			 EXIT_CODE(WEXITSTATUS(status));
90		procfree(p);
91	}
92	else
93		status = errno == ENOENT ? EXIT_NOTFOUND : EXIT_NOEXEC;
94	return status;
95}
96