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sigpause (2)
  • sigpause (2) ( FreeBSD man: Системные вызовы )
  • sigpause (2) ( Русские man: Системные вызовы )
  • >> sigpause (2) ( Linux man: Системные вызовы )
  • sigpause (3) ( Linux man: Библиотечные вызовы )
  • sigpause (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    sigpause - atomically release blocked signals and wait for interrupt
     
    

    SYNOPSIS

    #include <signal.h>
    
    int sigpause(int sigmask);  /* BSD */
    
    int sigpause(int sig);      /* Unix95 */
    
     

    DESCRIPTION

    Don't use this function. Use sigsuspend(2) instead.

    The function sigpause is designed to wait for some signal. It changes the process' 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.  

    HISTORY

    The classical BSD version of this function appeared in 4.2BSD. It sets the process' signal mask to sigmask. When the number of signals was increased above 32, this version was replaced by the incompatible Unix95 one, which removes only the specified signal sig from the process' signal mask. The unfortunate situation with two incompatible functions with the same name was solved by the sigsuspend(2) function, that takes a sigset_t * parameter (instead of an int).

    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 unless _XOPEN_SOURCE is defined.  

    SEE ALSO

    kill(2), sigaction(2), sigblock(2), sigprocmask(2), sigsuspend(2), sigvec(2)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    HISTORY
    SEE ALSO


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