65 lines
1.4 KiB
Perl
Executable file
65 lines
1.4 KiB
Perl
Executable file
#!/usr/bin/perl
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# vim: shiftwidth=4 tabstop=4
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#
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# Copyright 2016-2022 by Marco d'Itri <md@Linux.IT>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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use warnings;
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use strict;
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use autodie;
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use v5.16;
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convert($ARGV[0] || '/etc/shells');
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exit;
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sub convert {
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my ($file) = @_;
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my (@shells, @nonusr_shells, %seen_in_usr);
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open(my $in, '<', $file);
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while (<$in>) {
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chomp;
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push(@shells, $_);
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$seen_in_usr{$1} = 1 if m#^/usr(/s?bin/.+)#;
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push(@nonusr_shells, $_) if m#^/s?bin/#;
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}
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close $in;
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my @new_shells = # and add them to the list
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map { "/usr$_" } # add /usr to their path
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grep { not $seen_in_usr{$_} } # if they do not already exist in /usr
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@nonusr_shells; # for each shell not in /usr
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return unless @new_shells;
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umask(0022);
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open(my $out, '>', "$file.tmp");
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say $out $_ foreach @shells, @new_shells;
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close $out;
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rename("$file.tmp", $file);
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restore_context($file);
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}
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sub safe_system {
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my (@cmd) = @_;
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my $rc = system(@cmd);
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die "Failed to execute @cmd: $!\n" if $rc == -1;
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die "@cmd: rc=" . ($? >> 8) . "\n" if $rc;
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}
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sub restore_context {
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my ($file) = @_;
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return if not -x '/sbin/restorecon';
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safe_system('restorecon', $file);
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}
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