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sigblock(2) - sigblock, siggetmask, sigmask, sigsetmask, sigblock, siggetmask, sigmask, sigsetmask - manipulate the signal mask - man 2 sigblock

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SIGBLOCK(2)                Linux Programmer's Manual               SIGBLOCK(2)

       sigblock, siggetmask, sigsetmask, sigmask - manipulate the signal(2,7) mask

       #include <signal.h>

       int sigblock(int mask);

       int siggetmask(void);

       int sigsetmask(int mask);

       int sigmask(int signum);

       This interface is made obsolete by sigprocmask(2).

       The  sigblock system call adds the signals specified in(1,8) mask to the set(7,n,1 builtins)
       of signals currently being blocked from delivery.

       The sigsetmask system call replaces the set(7,n,1 builtins) of blocked signals  totally
       with  a  new  set(7,n,1 builtins) specified in(1,8) mask.  Signals are blocked if(3,n) the corre-
       sponding bit in(1,8) mask is a 1.

       The current set(7,n,1 builtins) of blocked signals can be obtained using siggetmask.

       The sigmask macro is provided to construct the mask for a given signum.

       siggetmask returns the current set(7,n,1 builtins) of masked signals.

       sigsetmask and sigblock return the previous set(7,n,1 builtins) of masked signals.

       Prototypes  for  these  functions  are only available if(3,n) _BSD_SOURCE is
       defined before the inclusion of any system header file.

       It is not possible to block SIGKILL or SIGSTOP -  this  restriction  is
       silently imposed by the system.

       4.4BSD.  These  function  calls appeared in(1,8) BSD 4.3 and are deprecated.
       Use the POSIX signal(2,7) facilities for new programs.

       kill(1,2,1 builtins)(2), sigprocmask(2), signal(2,7)(7)

Linux 1.3                         1995-08-31                       SIGBLOCK(2)

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