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

       sigpause - atomically release blocked signals and wait for interrupt

       #include <signal.h>

       int sigpause(int sigmask);  /* BSD */

       int sigpause(int sig);      /* System V / Unix95 */

       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.

       If sigpause() returns, it was interrupted by a signal  and  the  return
       value is -1 with errno set to EINTR.

       The System V version of sigpause() is standardized in POSIX.1-2001.

       The classical BSD version of this function appeared in 4.2BSD.  It sets
       the process's signal mask to sigmask.  Unix95 standardized  the  incom-
       patible System V version of this function, which removes only the spec-
       ified signal sig from the process's signal mask.  The unfortunate situ-
       ation  with two incompatible functions with the same name was solved by
       the sigsuspend(2) function, that takes a sigset_t *  argument  (instead
       of an int).

   Linux Notes
       On  Linux,  this  routine  is a system call only on the Sparc (sparc64)

       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.  The System V version is  used
       if _XOPEN_SOURCE is defined.

       kill(2),   sigaction(2),  sigprocmask(2),  sigsuspend(2),  sigblock(3),
       sigvec(3), feature_test_macros(7)

       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at

Linux                             2005-12-01                       SIGPAUSE(3)

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