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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* signals.h - header file for signals handling code
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1992-1997 Paul Falstad
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Paul Falstad or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Paul Falstad and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Paul Falstad and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Paul Falstad and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
#define SIGNAL_HANDTYPE RETSIGTYPE (*)_((int))
#ifndef HAVE_KILLPG
# define killpg(pgrp,sig) kill(-(pgrp),sig)
#endif
#define SIGZERR (SIGCOUNT+1)
#define SIGDEBUG (SIGCOUNT+2)
#define VSIGCOUNT (SIGCOUNT+3)
#define SIGEXIT 0
#ifdef SV_BSDSIG
# define SV_INTERRUPT SV_BSDSIG
#endif
/* If not a POSIX machine, then we create our *
* own POSIX style signal sets functions. */
#ifndef POSIX_SIGNALS
# define sigemptyset(s) (*(s) = 0)
# if NSIG == 32
# define sigfillset(s) (*(s) = ~(sigset_t)0, 0)
# else
# define sigfillset(s) (*(s) = (1 << NSIG) - 1, 0)
# endif
# define sigaddset(s,n) (*(s) |= (1 << ((n) - 1)), 0)
# define sigdelset(s,n) (*(s) &= ~(1 << ((n) - 1)), 0)
# define sigismember(s,n) ((*(s) & (1 << ((n) - 1))) != 0)
#endif /* ifndef POSIX_SIGNALS */
#define child_block() signal_block(sigchld_mask)
#define child_unblock() signal_unblock(sigchld_mask)
#define child_suspend(S) signal_suspend(SIGCHLD, S)
/* ignore a signal */
#define signal_ignore(S) signal(S, SIG_IGN)
/* return a signal to it default action */
#define signal_default(S) signal(S, SIG_DFL)
/* Use a circular queue to save signals caught during *
* critical sections of code. You call queue_signals to *
* start queueing, and unqueue_signals to process the *
* queue and stop queueing. Since the kernel doesn't *
* queue signals, it is probably overkill for zsh to do *
* this, but it shouldn't hurt anything to do it anyway. */
#define MAX_QUEUE_SIZE 128
#define queue_signals() (queueing_enabled++)
#define run_queued_signals() do { \
while (queue_front != queue_rear) { /* while signals in queue */ \
sigset_t oset; \
queue_front = (queue_front + 1) % MAX_QUEUE_SIZE; \
oset = signal_setmask(signal_mask_queue[queue_front]); \
zhandler(signal_queue[queue_front]); /* handle queued signal */ \
signal_setmask(oset); \
} \
} while (0)
#define unqueue_signals() do { \
DPUTS(!queueing_enabled, "BUG: unqueue_signals called but not queueing"); \
if (!--queueing_enabled) run_queued_signals(); \
} while (0)
#define queue_signal_level() queueing_enabled
#define dont_queue_signals() do { \
queueing_enabled = 0; \
run_queued_signals(); \
} while (0)
#define restore_queue_signals(q) (queueing_enabled = (q))
/*
* Similar (but simpler) mechanism used for queueing traps.
* Only needed if NO_TRAPS_ASYNC is set.
*/
#define queue_traps() (trap_queueing_enabled++)
#define run_queued_traps() do { \
while (trap_queue_front != trap_queue_rear) { /* while traps in queue */ \
trap_queue_front = (trap_queue_front + 1) % MAX_QUEUE_SIZE; \
dotrap(trap_queue[trap_queue_front]); /* handle queued trap */ \
} \
} while (0)
#define dont_queue_traps() do { \
trap_queueing_enabled = 0; \
run_queued_traps(); \
} while (0)
/* Make some signal functions faster. */
#ifdef POSIX_SIGNALS
#define signal_block(S) \
((dummy_sigset1 = (S)), \
sigprocmask(SIG_BLOCK, &dummy_sigset1, &dummy_sigset2), \
dummy_sigset2)
#else
# ifdef BSD_SIGNALS
#define signal_block(S) sigblock(S)
# else
extern sigset_t signal_block _((sigset_t));
# endif /* BSD_SIGNALS */
#endif /* POSIX_SIGNALS */
#ifdef POSIX_SIGNALS
#define signal_unblock(S) \
((dummy_sigset1 = (S)), \
sigprocmask(SIG_UNBLOCK, &dummy_sigset1, &dummy_sigset2), \
dummy_sigset2)
#else
extern sigset_t signal_unblock _((sigset_t));
#endif /* POSIX_SIGNALS */
|
