.SH SYNOPSIS
.nf
.B #include <stdio.h>
-.sp
+.PP
.BI "void flockfile(FILE *" filehandle );
.br
.BI "int ftrylockfile(FILE *" filehandle );
.br
.BI "void funlockfile(FILE *" filehandle );
.fi
-.sp
+.PP
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.ad l
-.sp
+.PP
All functions shown above:
.RS 4
/* Since glibc 2.24: */ _POSIX_C_SOURCE\ >=\ 199309L