4 use Digest::SHA1 qw(sha1 sha1_hex sha1_base64);
5 use Fcntl qw(:DEFAULT :flock);
10 # Copyright (C) 2010 Zygo Blaxell <dm5@mailtoo.hungrycats.org>
12 # This program is free software; you can redistribute it and/or modify
13 # it under the terms of the GNU General Public License as published by
14 # the Free Software Foundation; either version 2 of the License, or
15 # (at your option) any later version.
17 # This program is distributed in the hope that it will be useful,
18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 # GNU General Public License for more details.
22 # You should have received a copy of the GNU General Public License
23 # along with this program; if not, write to the Free Software
24 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 my ($filename) = (@_);
28 die "'$filename' is not a plain file" if (-l $filename) || ! (-f _);
29 my $ctx = Digest::SHA1->new;
30 sysopen(FILE, $filename, O_RDONLY|O_NONBLOCK) or die "open: $filename: $!";
31 binmode(FILE); # FIXME: Necessary? Probably harmless...
32 $ctx->addfile(\*FILE);
33 close(FILE) or die "close: $filename: $!";
34 return $ctx->b64digest;
40 Hashes a NUL-separated list of files on stdin into link-dir.
46 my ($from, $to) = (@_);
50 $inode_dir =~ s:[^/]*$::o;
51 $inode_base =~ s:^.*/::os;
52 my $tmp_to = File::Temp::tempnam($inode_dir, ".$inode_base.");
53 link($from, $tmp_to) or die "link: $from -> $tmp_to: $!";
54 unless (rename($tmp_to, $to)) {
56 unlink($tmp_to) or warn "unlink: $tmp_to: $!"; # Try, possibly in vain, to clean up
57 die "rename: $tmp_to -> $from: $saved_bang";
61 my $link_dir = shift @ARGV;
62 (-d $link_dir) or usage;
69 print STDERR "digest($file) = ";
70 my $digest = digest($file);
72 print STDERR "$digest\n";
73 $digest =~ s:^(.)(.)(.):$1/$2/$3:osg;
74 my ($parent) = ($digest =~ m:^(.*/):osg);
75 $parent = "$link_dir/$parent";
76 mkpath($parent, { verbose => 1 });
77 die "mkpath: $parent: $!" unless -d $parent;
78 link_files($file, "$link_dir/$digest");
80 warn "$file: $@" if $@;
87 #################################################################################
88 # GNU GENERAL PUBLIC LICENSE #
89 # Version 2, June 1991 #
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367 # END OF TERMS AND CONDITIONS #
369 # How to Apply These Terms to Your New Programs #
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405 # This is free software, and you are welcome to redistribute it #
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418 # `Gnomovision' (which makes passes at compilers) written by James Hacker. #
420 # <signature of Ty Coon>, 1 April 1989 #
421 # Ty Coon, President of Vice #
423 # This General Public License does not permit incorporating your program into #
424 # proprietary programs. If your program is a subroutine library, you may #
425 # consider it more useful to permit linking proprietary applications with the #
426 # library. If this is what you want to do, use the GNU Library General #
427 # Public License instead of this License. #
428 #################################################################################