1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 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*                  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
33int
34procclose(register Proc_t* p)
35{
36	int	pid;
37	int	flags = 0;
38	int	status = -1;
39
40	if (p)
41	{
42		if (p->rfd >= 0)
43			close(p->rfd);
44		if (p->wfd >= 0 && p->wfd != p->rfd)
45			close(p->wfd);
46		if (p->flags & PROC_ORPHAN)
47			status = 0;
48		else
49		{
50			if (p->flags & PROC_ZOMBIE)
51			{
52				/*
53				 * process may leave a zombie behind
54				 * give it a chance to do that but
55				 * don't hang waiting for it
56				 */
57
58				flags |= WNOHANG;
59				sleep(1);
60			}
61			if (!(p->flags & PROC_FOREGROUND))
62				sigcritical(SIG_REG_EXEC|SIG_REG_PROC);
63			while ((pid = waitpid(p->pid, &status, flags)) == -1 && errno == EINTR);
64			if (pid != p->pid && (flags & WNOHANG))
65				status = 0;
66			if (!(p->flags & PROC_FOREGROUND))
67				sigcritical(0);
68			else
69			{
70				if (p->sigint != SIG_IGN)
71					signal(SIGINT, p->sigint);
72				if (p->sigquit != SIG_IGN)
73					signal(SIGQUIT, p->sigquit);
74#if defined(SIGCHLD)
75#if _lib_sigprocmask
76				sigprocmask(SIG_SETMASK, &p->mask, NiL);
77#else
78#if _lib_sigsetmask
79				sigsetmask(p->mask);
80#else
81				if (p->sigchld != SIG_DFL)
82					signal(SIGCHLD, p->sigchld);
83#endif
84#endif
85#endif
86			}
87			status = status == -1 ?
88				 EXIT_QUIT :
89				 WIFSIGNALED(status) ?
90				 EXIT_TERM(WTERMSIG(status)) :
91				 EXIT_CODE(WEXITSTATUS(status));
92		}
93		procfree(p);
94	}
95	else
96		status = errno == ENOENT ? EXIT_NOTFOUND : EXIT_NOEXEC;
97	return status;
98}
99