137 lines
3.2 KiB
Perl
Executable File
137 lines
3.2 KiB
Perl
Executable File
#! /usr/bin/perl
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# ex:ts=8 sw=4:
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# $OpenBSD: pkg_subst,v 1.6 2015/11/07 09:52:24 espie Exp $
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#
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# Copyright (c) 2008 Marc Espie <espie@openbsd.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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# rather simple script
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use strict;
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use warnings;
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use OpenBSD::Getopt;
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use OpenBSD::Subst;
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use OpenBSD::State;
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use OpenBSD::IdCache;
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sub fatal
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{
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print STDERR @_, "\n";
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exit 1;
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}
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my @basedirs;
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sub ensure_basedir
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{
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my $file = shift;
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for my $b (@basedirs) {
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return if $file =~ m/^\Q$b\E\//;
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}
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# try harder!
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require File::Spec;
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$file = File::Spec->canonpath(File::Spec->rel2abs($file));
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for my $b (@basedirs) {
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return if $file =~ m/^\Q$b\E\//;
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}
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fatal("must use -m to copy $file which is outside ".
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join(" ", @basedirs));
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}
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my $subst = OpenBSD::Subst->new;
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our ($opt_c, $opt_i);
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my ($fuid, $fgid, $fmode);
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my ($uidc, $gidc);
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my $ui = OpenBSD::State->new('pkg_subst');
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$ui->usage_is( '[-ci] [-Dvar=value ...] [-B basedir] [-g group] [-m mode] [-o owner] [file ...]');
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$ui->do_options(
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sub {
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getopts('B:D:g:m:o:chi',
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{'D' =>
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sub {
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$subst->parse_option(shift);
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},
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'o' => sub {
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my $owner = shift;
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$uidc //= OpenBSD::UidCache->new;
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$fuid = $uidc->lookup($owner, -1);
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fatal("$owner is not a valid user") if $fuid == -1;
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},
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'g' => sub {
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my $group = shift;
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$gidc //= OpenBSD::GidCache->new;
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$fgid = $gidc->lookup($group, -1);
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fatal("$group is not a valid group") if $fgid == -1;
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},
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'B' => sub {
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push(@basedirs, shift);
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},
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'm' => sub {
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my $mode = shift;
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$fmode = oct($mode);
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fatal("$mode is not a valid mode") if $fmode == 0;
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},
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'h' => sub { $ui->usage; },
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});
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});
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my $bak = $subst->value('BAK');
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if (!defined $bak) {
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$bak = '.beforesubst';
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}
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if (@ARGV == 0) {
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$subst->copy_fh2(\*STDIN, \*STDOUT);
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}
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while (my $src = shift) {
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my $dest;
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if ($opt_c) {
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$dest = shift or die "odd number of files";
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if (@basedirs > 0 && !defined $fmode) {
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ensure_basedir($src);
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}
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} else {
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$dest = $src;
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$src .= $bak;
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rename($dest, $src) or fatal("Can't rename $dest: $!");
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}
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my $fh = $subst->copy($src, $dest);
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# copy rights, owner, group as well
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my ($uid, $gid, $mode) = (stat $src)[4, 5, 2];
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my $r1 = chown $fuid // $uid, $fgid // $gid, $fh;
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if (defined $fmode) {
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$mode = $fmode;
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}
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my $r2 = chmod $mode & 07777, $fh;
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if (defined $fuid || defined $fgid || $< == 0) {
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if ($r1 == 0 && !$opt_i) {
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fatal("chown on $dest failed");
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}
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if ($r2 == 0) {
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fatal("chmod on $dest failed");
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}
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}
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}
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