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sigpause(2) [osx man page]

SIGPAUSE(2)						      BSD System Calls Manual						       SIGPAUSE(2)

NAME
sigpause -- atomically release blocked signals and wait for interrupt LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <signal.h> int sigpause(int sig); DESCRIPTION
This interface is made obsolete by sigsuspend(2). Sigpause() assigns sig to the set of masked signals and then waits for a signal to arrive; on return the set of masked signals is restored. Sig is usually 0, indicating that no signals are to be blocked. Sigpause() always terminates by being interrupted, returning -1 with errno set to EINTR. COMPATIBILITY
sigpause() now takes a signal value and not a mask. This often appears as a hang in sigpause$UNIX2003 or with sigpause() returning with errno set to EINVAL. Use sigsuspend() with signal masks. SEE ALSO
kill(2), sigaction(2), sigblock(2), sigprocmask(2), sigsuspend(2), sigvec(2) HISTORY
The sigpause() function call appeared in 4.2BSD and has been deprecated. BSD
June 2, 1993 BSD

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SIGPAUSE(3)						     Linux Programmer's Manual						       SIGPAUSE(3)

NAME
sigpause - atomically release blocked signals and wait for interrupt SYNOPSIS
#include <signal.h> int sigpause(int sigmask); /* BSD */ int sigpause(int sig); /* System V / UNIX 95 */ DESCRIPTION
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. CONFORMING TO
The System V version of sigpause() is standardized in POSIX.1-2001. NOTES
History The classical BSD version of this function appeared in 4.2BSD. It sets the process's signal mask to sigmask. UNIX 95 standardized the incompatible System V version of this function, which removes only the specified signal sig from the process's signal mask. The unfortu- nate situation with two incompatible functions with the same name was solved by the sigsuspend(2) function, that takes a sigset_t * argu- ment (instead of an int). Linux Notes On Linux, this routine is a system call only on the Sparc (sparc64) architecture. Libc4 and libc5 only know about the BSD version. 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. SEE ALSO
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigblock(3), sigvec(3), feature_test_macros(7) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2010-09-12 SIGPAUSE(3)
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