1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* cook - file construction tool
* Copyright (C) 1997-1999, 2001, 2006, 2007 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate desists
*/
#include <common/ac/signal.h>
#include <common/ac/string.h>
#include <cook/desist.h>
#include <common/error_intl.h>
#include <cook/os_interface.h>
#include <common/star.h>
static int desist_flag;
/*
* NAME
* interrupt - handle interrupts by signals
*
* SYNOPSIS
* void interrupt(int);
*
* DESCRIPTION
* The interrupt function is used to set the appropriate flags when an
* interrupt occurs.
*
* RETURNS
* void
*
* CAVEAT
* Don't use too extravagantly, because it just returns!
*/
static RETSIGTYPE
interrupt(int n)
{
sub_context_ty *scp;
star_eoln();
desist_flag++;
scp = sub_context_new();
sub_var_set(scp, "Name", "%s", strsignal(n));
error_intl(scp, i18n("interrupted by $name"));
sub_context_delete(scp);
signal(n, interrupt);
}
/*
* NAME
* desist_requested
*
* SYNOPSIS
* int desist_requested(void);
*
* DESCRIPTION
* The desist_requested function is used to test whether the user
* has requested that we deist by sending an interrupt.
*/
int
desist_requested(void)
{
int result;
result = (desist_flag != 0);
desist_flag = 0;
return result;
}
/*
* NAME
* desist_enable
*
* SYNOPSIS
* void desist_enable(void);
*
* DESCRIPTION
* The desist_enable function is used to set the signal handlers
* which will trap user desist requests.
*/
void
desist_enable(void)
{
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, interrupt);
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, interrupt);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, interrupt);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, interrupt);
}
|