.SH SYNOPSIS
.nf
.B #include <signal.h>
-.PP
+.P
.B typedef void (*sighandler_t)(int);
-.PP
+.P
.BI "[[deprecated]] int gsignal(int " signum );
-.PP
+.P
.BI "[[deprecated]] sighandler_t ssignal(int " signum ", sighandler_t " action );
.fi
-.PP
+.P
.RS -4
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.RE
-.PP
+.P
.BR gsignal (),
.BR ssignal ():
.nf
and
.BR signal (2),
respectively.
-.PP
+.P
Elsewhere, on System V-like systems, these functions implement
software signaling, entirely independent of the classical
.BR signal (2)