sigpause3
Atomically release blocked signals and wait for interrupt
Usage
#include <signal.h>
[[deprecated]] int sigpause(int sigmask); /* BSD (but see VERSIONS) */
[[deprecated]] int sigpause(int sig); /* POSIX.1 / SysV / UNIX 95 */
Library
Standard C library (libc, -lc)
Overview
Don't use this function. Use sigsuspend(2) instead.
The function sigpause() is designed to wait for some signal. It changes the process's signal mask (set of blocked signals), and then waits for a signal to arrive. Upon arrival of a signal, the original signal mask is restored.
Return value
If sigpause() returns, it was interrupted by a signal and the return value is -1 with errno set to EINTR.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| sigpause() | Thread safety | MT-Safe |
Versions
On Linux, this routine is a system call only on the Sparc (sparc64) architecture.
glibc uses the BSD version if the _BSD_SOURCE feature test macro is defined and none of _POSIX_SOURCE, _POSIX_C_SOURCE, _XOPEN_SOURCE, _GNU_SOURCE, or _SVID_SOURCE is defined. Otherwise, the System V version is used, and feature test macros must be defined as follows to obtain the declaration:
•
|
Since glibc 2.26: _XOPEN_SOURCE >= 500 |
|---|---|
•
|
glibc 2.25 and earlier: _XOPEN_SOURCE |
Since glibc 2.19, only the System V version is exposed by <signal.h>; applications that formerly used the BSD sigpause() should be amended to use sigsuspend(2).
Releases
11 releases since Debian 4.0 (Etch); the text changed 10 times.