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.Dd April 30, 2010 .Dt SIGSET 3 .Os .Sh NAME .Nm sigset .Nd manipulate signal dispositions .Sh LIBRARY .Lb libc .Sh SYNOPSIS n signal.h The following is Quite Ugly, but syntactically correct. Don't try to
fix it.
.Ft void \*(lp* .Fn sigset "int sig" "void \*(lp*disp\*(rp\*(lpint\*(rp\*(rp\*(rp\*(lpint" .Sh DESCRIPTION f -symbolic This interface is made obsolete by .Xr sigaction 2 and .Xr sigprocmask 2 . .Ef
p The .Fn sigset function manipulates the disposition of the signal .Fa sig . The new disposition is given in .Fa disp .
p If .Fa disp is one of .Dv SIG_DFL , .Dv SIG_IGN , or the address of a handler function, the disposition of .Fa sig is changed accordingly, and .Fa sig is removed from the process' signal mask. Also, if .Fa disp is the address of a handler function, .Fa sig will be added to the process' signal mask during execution of the handler.
p If .Fa disp is equal to .Dv SIG_HOLD , .Fa sig is added to the calling process' signal mask and the disposition of .Fa sig remains unchanged. .Sh RETURN VALUES If successful, the .Fn sigset function returns .Dv SIG_HOLD if .Fa sig had been blocked, and the previous disposition of .Fa sig if it had not been blocked. Otherwise .Dv SIG_ERR is returned and .Va errno is set to indicate the error. .Sh ERRORS The .Fn sigset function will fail if: l -tag -width Er t Bq Er EINVAL The argument .Fa sig is not a valid signal number; or an attempt is made to ignore a signal that cannot be ignored, such as .Dv SIGKILL or .Dv SIGSTOP . .El .Sh SEE ALSO .Xr sigaction 2 , .Xr sigprocmask 2 .Sh STANDARDS The .Fn sigset function conforms to .St -p1003.1-2001 . It was however marked as obsolete in the .St -p1003.1-2008 revision of the standard.