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1 perry 1 SIGBLOCK
2 !!!SIGBLOCK
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 NOTES
8 CONFORMING TO
9 SEE ALSO
10 ----
11 !!NAME
12
13
14 sigblock, siggetmask, sigsetmask, sigmask - manipulate the signal mask
15 !!SYNOPSIS
16
17
18 __#include __
19
20
21 __int sigblock(int__ ''mask''__);__
22
23
24 __int siggetmask(void);__
25
26
27 __int sigsetmask(int__ ''mask''__);__
28
29
30 __int sigmask(int__ ''signum''__);__
31 !!DESCRIPTION
32
33
34 This interface is made obsolete by
35 sigprocmask(2).
36
37
38 The __sigblock__ system call adds the signals specified
39 in ''mask'' to the set of signals currently being blocked
40 from delivery.
41
42
43 The __sigsetmask__ system call replaces the set of
44 blocked signals totally with a new set specified in
45 ''mask''. Signals are blocked if the corresponding bit in
46 ''mask'' is a 1.
47
48
49 The current set of blocked signals can be obtained using
50 __siggetmask__.
51
52
53 The __sigmask__ macro is provided to construct the mask
54 for a given ''signum''.
55 !!RETURN VALUE
56
57
58 __siggetmask__ returns the current set of masked
59 signals.
60
61
62 __sigsetmask__ and __sigblock__ return the previous
63 set of masked signals.
64 !!NOTES
65
66
67 Prototypes for these functions are only available if
68 ___BSD_SOURCE__ is defined before the inclusion of any
69 system header file.
70
71
72 It is not possible to block __SIGKILL__ or __SIGSTOP__
73 - this restriction is silently imposed by the
74 system.
75 !!CONFORMING TO
76
77
78 4.4BSD. These function calls appeared in BSD 4.3 and are
79 deprecated. Use the POSIX signal facilities for new
80 programs.
81 !!SEE ALSO
82
83
84 kill(2), sigprocmask(2),
85 signal(7)
86 ----
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