1SIGSUSPEND(2) Linux Programmer's Manual SIGSUSPEND(2)
2
3
4
6 sigsuspend - wait for a signal
7
9 #include <signal.h>
10
11 int sigsuspend(const sigset_t *mask);
12
13 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
14
15 sigsuspend(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
16
18 sigsuspend() temporarily replaces the signal mask of the calling
19 process with the mask given by mask and then suspends the process until
20 delivery of a signal whose action is to invoke a signal handler or to
21 terminate a process.
22
23 If the signal terminates the process, then sigsuspend() does not
24 return. If the signal is caught, then sigsuspend() returns after the
25 signal handler returns, and the signal mask is restored to the state
26 before the call to sigsuspend().
27
28 It is not possible to block SIGKILL or SIGSTOP; specifying these sig‐
29 nals in mask, has no effect on the process's signal mask.
30
32 sigsuspend() always returns -1, normally with the error EINTR.
33
35 EFAULT mask points to memory which is not a valid part of the process
36 address space.
37
38 EINTR The call was interrupted by a signal.
39
41 POSIX.1-2001.
42
44 Normally, sigsuspend() is used in conjunction with sigprocmask(2) in
45 order to prevent delivery of a signal during the execution of a criti‐
46 cal code section. The caller first blocks the signals with sigproc‐
47 mask(2). When the critical code has completed, the caller then waits
48 for the signals by calling sigsuspend() with the signal mask that was
49 returned by sigprocmask(2) (in the oldset argument).
50
51 See sigsetops(3) for details on manipulating signal sets.
52
54 kill(2), pause(2), sigaction(2), signal(2), sigprocmask(2), sigwait‐
55 info(2), sigsetops(3), sigwait(3), signal(7)
56
58 This page is part of release 3.22 of the Linux man-pages project. A
59 description of the project, and information about reporting bugs, can
60 be found at http://www.kernel.org/doc/man-pages/.
61
62
63
64Linux 2008-08-29 SIGSUSPEND(2)