root/src/noitedit/sig.c

Revision fb10ef1ee5f5311cf9183562560fdc6f2ec418ee, 5.0 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 9 months ago)

Fix various coverity issues.

  • Property mode set to 100644
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1 /*      $NetBSD: sig.c,v 1.8 2001/01/09 17:31:04 jdolecek Exp $ */
2
3 /*-
4  * Copyright (c) 1992, 1993
5  *      The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Christos Zoulas of Cornell University.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *      This product includes software developed by the University of
21  *      California, Berkeley and its contributors.
22  * 4. Neither the name of the University nor the names of its contributors
23  *    may be used to endorse or promote products derived from this software
24  *    without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36  * SUCH DAMAGE.
37  */
38
39 #include "noitedit/compat.h"
40 #if !defined(lint) && !defined(SCCSID)
41 #if 0
42 static char sccsid[] = "@(#)sig.c       8.1 (Berkeley) 6/4/93";
43 #else
44 __RCSID("$NetBSD: sig.c,v 1.8 2001/01/09 17:31:04 jdolecek Exp $");
45 #endif
46 #endif /* not lint && not SCCSID */
47
48 /*
49  * sig.c: Signal handling stuff.
50  *        our policy is to trap all signals, set a good state
51  *        and pass the ball to our caller.
52  */
53 #include "noitedit/sys.h"
54 #include "noitedit/el.h"
55 #include <stdlib.h>
56
57 private EditLine *sel = NULL;
58
59 private const int sighdl[] = {
60 #define _DO(a)  (a),
61         ALLSIGS
62 #undef  _DO
63         - 1
64 };
65
66 private void sig_handler(int);
67
68 /* sig_handler():
69  *      This is the handler called for all signals
70  *      XXX: we cannot pass any data so we just store the old editline
71  *      state in a private variable
72  */
73 private void
74 sig_handler(int signo)
75 {
76         int i;
77         sigset_t nset, oset;
78
79         (void) sigemptyset(&nset);
80         (void) sigaddset(&nset, signo);
81         (void) sigprocmask(SIG_BLOCK, &nset, &oset);
82
83         switch (signo) {
84         case SIGCONT:
85                 (void)tty_rawmode(sel);
86                 if (ed_redisplay(sel, 0) == CC_REFRESH)
87                         re_refresh(sel);
88                 term__flush();
89                 break;
90
91         case SIGWINCH:
92                 el_resize(sel);
93                 break;
94
95         default:
96                 tty_cookedmode(sel);
97                 break;
98         }
99
100         for (i = 0; sighdl[i] != -1; i++)
101                 if (signo == sighdl[i])
102                         break;
103
104         (void) signal(signo, sel->el_signal[i]);
105         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
106         (void) kill(0, signo);
107 }
108
109
110 /* sig_init():
111  *      Initialize all signal stuff
112  */
113 protected int
114 sig_init(EditLine *el)
115 {
116         int i;
117         sigset_t nset, oset;
118
119         (void) sigemptyset(&nset);
120 #define _DO(a) (void) sigaddset(&nset, a);
121         ALLSIGS
122 #undef  _DO
123             (void) sigprocmask(SIG_BLOCK, &nset, &oset);
124
125 #define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t))
126
127         el->el_signal = (sig_t *) el_malloc(SIGSIZE);
128         if (el->el_signal == NULL)
129                 return (-1);
130         for (i = 0; sighdl[i] != -1; i++)
131                 el->el_signal[i] = SIG_ERR;
132
133         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
134
135         return (0);
136 }
137
138
139 /* sig_end():
140  *      Clear all signal stuff
141  */
142 protected void
143 sig_end(EditLine *el)
144 {
145
146         el_free((ptr_t) el->el_signal);
147         el->el_signal = NULL;
148 }
149
150
151 /* sig_set():
152  *      set all the signal handlers
153  */
154 protected void
155 sig_set(EditLine *el)
156 {
157         int i;
158         sigset_t nset, oset;
159
160         (void) sigemptyset(&nset);
161 #define _DO(a) (void) sigaddset(&nset, a);
162         ALLSIGS
163 #undef  _DO
164             (void) sigprocmask(SIG_BLOCK, &nset, &oset);
165
166         for (i = 0; sighdl[i] != -1; i++) {
167                 sig_t s;
168                 /* This could happen if we get interrupted */
169                 if ((s = signal(sighdl[i], sig_handler)) != sig_handler)
170                         el->el_signal[i] = s;
171         }
172         sel = el;
173         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
174 }
175
176
177 /* sig_clr():
178  *      clear all the signal handlers
179  */
180 protected void
181 sig_clr(EditLine *el)
182 {
183         int i;
184         sigset_t nset, oset;
185
186         (void) sigemptyset(&nset);
187 #define _DO(a) (void) sigaddset(&nset, a);
188         ALLSIGS
189 #undef  _DO
190             (void) sigprocmask(SIG_BLOCK, &nset, &oset);
191
192         for (i = 0; sighdl[i] != -1; i++)
193                 if (el->el_signal[i] != SIG_ERR)
194                         (void) signal(sighdl[i], el->el_signal[i]);
195
196         sel = NULL;             /* we are going to die if the handler is
197                                  * called */
198         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
199 }
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