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Rev Author # Line
1 perry 1 SIGINTERRUPT
2 !!!SIGINTERRUPT
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 ERRORS
8 CONFORMING TO
9 SEE ALSO
10 ----
11 !!NAME
12
13
14 siginterrupt - allow signals to interrupt system calls
15 !!SYNOPSIS
16
17
18 __#include
19 __ ''sig''__, int__ ''flag''__);
20 __
21 !!DESCRIPTION
22
23
24 The __siginterrupt()__ function changes the restart
25 behaviour when a system call is interrupted by the signal
26 ''sig''. If the ''flag'' argument is false (0), then
27 system calls will be restarted if interrupted by the
28 specified signal ''sig''. This is the default behaviour
29 in Linux. However, when a new signal handler is specified
30 with the signal(2) function, the system call is
31 interrupted by default.
32
33
34 If the ''flags'' argument is true (1) and no data has
35 been transferred, then a system call interrupted by the
36 signal ''sig'' will return -1 and the global variable
37 ''errno'' will be set to __EINTR__.
38
39
40 If the ''flags'' argument is true (1) and data transfer
41 has started, then the system call will be interrupted and
42 will return the actual amount of data
43 transferred.
44 !!RETURN VALUE
45
46
47 The __siginterrupt()__ function returns 0 on success, or
48 -1 if the signal number ''sig'' is invalid.
49 !!ERRORS
50
51
52 __EINVAL__
53
54
55 The specified signal number is invalid.
56 !!CONFORMING TO
57
58
59 BSD 4.3
60 !!SEE ALSO
61
62
63 signal(2)
64 ----
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