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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libedit/sig.c	Lines:	14	61	23.0 %
Date:	2017-11-07	Branches:	3	23	13.0 %


/*	$OpenBSD: sig.c,v 1.19 2016/04/11 21:17:29 schwarze Exp $	*/
/*	$NetBSD: sig.c,v 1.25 2016/04/11 18:56:31 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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"

/*
 * sig.c: Signal handling stuff.
 *	  our policy is to trap all signals, set a good state
 *	  and pass the ball to our caller.
 */
#include <errno.h>
#include <stdlib.h>

#include "el.h"
#include "common.h"

static EditLine *sel = NULL;

static const int sighdl[] = {
#define	_DO(a)	(a),
	ALLSIGS
#undef	_DO
	- 1
};

static void sig_handler(int);

/* sig_handler():
 *	This is the handler called for all signals
 *	XXX: we cannot pass any data so we just store the old editline
 *	state in a private variable
 */
static void
sig_handler(int signo)
{
	int i, save_errno;
	sigset_t nset, oset;

	save_errno = errno;
	(void) sigemptyset(&nset);
	(void) sigaddset(&nset, signo);
	(void) sigprocmask(SIG_BLOCK, &nset, &oset);

	sel->el_signal->sig_no = signo;

	switch (signo) {
	case SIGCONT:
		tty_rawmode(sel);
		if (ed_redisplay(sel, 0) == CC_REFRESH)
			re_refresh(sel);
		terminal__flush(sel);
		break;

	case SIGWINCH:
		el_resize(sel);
		break;

	default:
		tty_cookedmode(sel);
		break;
	}

	for (i = 0; sighdl[i] != -1; i++)
		if (signo == sighdl[i])
			break;

	(void) sigaction(signo, &sel->el_signal->sig_action[i], NULL);
	sel->el_signal->sig_action[i].sa_handler = SIG_ERR;
	sel->el_signal->sig_action[i].sa_flags = 0;
	sigemptyset(&sel->el_signal->sig_action[i].sa_mask);
	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
	(void) kill(0, signo);
	errno = save_errno;
}


/* sig_init():
 *	Initialize all signal stuff
 */
protected int
sig_init(EditLine *el)
{
	size_t i;
	sigset_t *nset, oset;

	el->el_signal = malloc(sizeof(*el->el_signal));
	if (el->el_signal == NULL)
		return -1;

	nset = &el->el_signal->sig_set;
	(void) sigemptyset(nset);
#define	_DO(a) (void) sigaddset(nset, a);
	ALLSIGS
#undef	_DO
	(void) sigprocmask(SIG_BLOCK, nset, &oset);

	for (i = 0; sighdl[i] != -1; i++) {
		el->el_signal->sig_action[i].sa_handler = SIG_ERR;
		el->el_signal->sig_action[i].sa_flags = 0;
		sigemptyset(&el->el_signal->sig_action[i].sa_mask);
	}

	(void) sigprocmask(SIG_SETMASK, &oset, NULL);

	return 0;
}


/* sig_end():
 *	Clear all signal stuff
 */
protected void
sig_end(EditLine *el)
{

	free(el->el_signal);
	el->el_signal = NULL;
}


/* sig_set():
 *	set all the signal handlers
 */
protected void
sig_set(EditLine *el)
{
	size_t i;
	sigset_t oset;
	struct sigaction osa, nsa;

	nsa.sa_handler = sig_handler;
	nsa.sa_flags = 0;
	sigemptyset(&nsa.sa_mask);

	(void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);

	for (i = 0; sighdl[i] != -1; i++) {
		/* This could happen if we get interrupted */
		if (sigaction(sighdl[i], &nsa, &osa) != -1 &&
		    osa.sa_handler != sig_handler)
			el->el_signal->sig_action[i] = osa;
	}
	sel = el;
	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
}


/* sig_clr():
 *	clear all the signal handlers
 */
protected void
sig_clr(EditLine *el)
{
	size_t i;
	sigset_t oset;

	(void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);

	for (i = 0; sighdl[i] != -1; i++)
		if (el->el_signal->sig_action[i].sa_handler != SIG_ERR)
			(void)sigaction(sighdl[i],
			    &el->el_signal->sig_action[i], NULL);

	sel = NULL;		/* we are going to die if the handler is
				 * called */
	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: sig.c,v 1.19 2016/04/11 21:17:29 schwarze Exp $ */
2			/* $NetBSD: sig.c,v 1.25 2016/04/11 18:56:31 christos Exp $ */
3
4			/*-
5			* Copyright (c) 1992, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Christos Zoulas of Cornell University.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include "config.h"
37
38			/*
39			* sig.c: Signal handling stuff.
40			* our policy is to trap all signals, set a good state
41			* and pass the ball to our caller.
42			*/
43			#include <errno.h>
44			#include <stdlib.h>
45
46			#include "el.h"
47			#include "common.h"
48
49			static EditLine *sel = NULL;
50
51			static const int sighdl[] = {
52			#define _DO(a) (a),
53			ALLSIGS
54			#undef _DO
55			- 1
56			};
57
58			static void sig_handler(int);
59
60			/* sig_handler():
61			* This is the handler called for all signals
62			* XXX: we cannot pass any data so we just store the old editline
63			* state in a private variable
64			*/
65			static void
66			sig_handler(int signo)
67			{
68			int i, save_errno;
69			sigset_t nset, oset;
70
71			save_errno = errno;
72			(void) sigemptyset(&nset);
73			(void) sigaddset(&nset, signo);
74			(void) sigprocmask(SIG_BLOCK, &nset, &oset);
75
76			sel->el_signal->sig_no = signo;
77
78			switch (signo) {
79			case SIGCONT:
80			tty_rawmode(sel);
81			if (ed_redisplay(sel, 0) == CC_REFRESH)
82			re_refresh(sel);
83			terminal__flush(sel);
84			break;
85
86			case SIGWINCH:
87			el_resize(sel);
88			break;
89
90			default:
91			tty_cookedmode(sel);
92			break;
93			}
94
95			for (i = 0; sighdl[i] != -1; i++)
96			if (signo == sighdl[i])
97			break;
98
99			(void) sigaction(signo, &sel->el_signal->sig_action[i], NULL);
100			sel->el_signal->sig_action[i].sa_handler = SIG_ERR;
101			sel->el_signal->sig_action[i].sa_flags = 0;
102			sigemptyset(&sel->el_signal->sig_action[i].sa_mask);
103			(void) sigprocmask(SIG_SETMASK, &oset, NULL);
104			(void) kill(0, signo);
105			errno = save_errno;
106			}
107
108
109			/* sig_init():
110			* Initialize all signal stuff
111			*/
112			protected int
113			sig_init(EditLine *el)
114			{
115			size_t i;
116		12	sigset_t *nset, oset;
117
118		6	el->el_signal = malloc(sizeof(*el->el_signal));
119	✗✓	6	if (el->el_signal == NULL)
120			return -1;
121
122		6	nset = &el->el_signal->sig_set;
123		6	(void) sigemptyset(nset);
124			#define _DO(a) (void) sigaddset(nset, a);
125		6	ALLSIGS
126			#undef _DO
127		6	(void) sigprocmask(SIG_BLOCK, nset, &oset);
128
129	✓✓	96	for (i = 0; sighdl[i] != -1; i++) {
130		42	el->el_signal->sig_action[i].sa_handler = SIG_ERR;
131		42	el->el_signal->sig_action[i].sa_flags = 0;
132		42	sigemptyset(&el->el_signal->sig_action[i].sa_mask);
133			}
134
135		6	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
136
137		6	return 0;
138		6	}
139
140
141			/* sig_end():
142			* Clear all signal stuff
143			*/
144			protected void
145			sig_end(EditLine *el)
146			{
147
148			free(el->el_signal);
149			el->el_signal = NULL;
150			}
151
152
153			/* sig_set():
154			* set all the signal handlers
155			*/
156			protected void
157			sig_set(EditLine *el)
158			{
159			size_t i;
160			sigset_t oset;
161			struct sigaction osa, nsa;
162
163			nsa.sa_handler = sig_handler;
164			nsa.sa_flags = 0;
165			sigemptyset(&nsa.sa_mask);
166
167			(void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);
168
169			for (i = 0; sighdl[i] != -1; i++) {
170			/* This could happen if we get interrupted */
171			if (sigaction(sighdl[i], &nsa, &osa) != -1 &&
172			osa.sa_handler != sig_handler)
173			el->el_signal->sig_action[i] = osa;
174			}
175			sel = el;
176			(void) sigprocmask(SIG_SETMASK, &oset, NULL);
177			}
178
179
180			/* sig_clr():
181			* clear all the signal handlers
182			*/
183			protected void
184			sig_clr(EditLine *el)
185			{
186			size_t i;
187			sigset_t oset;
188
189			(void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);
190
191			for (i = 0; sighdl[i] != -1; i++)
192			if (el->el_signal->sig_action[i].sa_handler != SIG_ERR)
193			(void)sigaction(sighdl[i],
194			&el->el_signal->sig_action[i], NULL);
195
196			sel = NULL; /* we are going to die if the handler is
197			* called */
198			(void)sigprocmask(SIG_SETMASK, &oset, NULL);
199			}