1 #!/usr/bin/env perl
2 # SPDX-License-Identifier: GPL-2.0
3 # Prefix all lines with "# ", unbuffered. Command being piped in may need
4 # to have unbuffering forced with "stdbuf -i0 -o0 -e0 $cmd".
5 use strict;
6 use IO::Handle;
7
8 binmode STDIN;
9 binmode STDOUT;
10
11 STDOUT->autoflush(1);
12
13 my $needed = 1;
14 while (1) {
15 my $char;
16 my $bytes = sysread(STDIN, $char, 1);
17 exit 0 if ($bytes == 0);
18 if ($needed) {
19 print "# ";
20 $needed = 0;
21 }
22 print $char;
23 $needed = 1 if ($char eq "\n");
24 }
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.