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sigblock(2)
NAME
  sigblock - Provides a compatibility interface to the sigprocmask function

LIBRARY
  Standard C Library (libc.a)

SYNOPSIS
  int sigblock(
  int mask );

PARAMETERS
  mask	    Specifies the signals to be added to the set of signals currently
	    being blocked from delivery.

DESCRIPTION
  The sigblock() function causes the signals specified by the mask parameter
  to be added to the set of signals currently being blocked from delivery.
  The signals are blocked from delivery by logically ORing the mask parameter
  into the signal mask of the process.	Signal i is blocked if the i-th bit
  in the mask parameter is a value of 1. Only signals with values 1-31 can be
  masked with the sigblock() function.

NOTES
  It is not possible to block SIGKILL. The system provides no indication of
  this restriction.

  The sigblock() function is provided for compatibility to other UNIX
  systems. Its function is a subset of the sigprocmask() function.

RETURN VALUES
  On completion, the previous set of masked signals is returned.

RELATED INFORMATION
  Functions: kill(2), sigaction(2), sigpause(3), sigprocmask(2),
  sigsuspend(2), sigvec(2)

Index for Section 2

Alphabetical listing for S

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