929faf54e7
- updating grub2-once - added --list switch. - improved --help and error handling. OBS-URL: https://build.opensuse.org/request/show/223241 OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=77
132 lines
2.4 KiB
Perl
132 lines
2.4 KiB
Perl
#!/usr/bin/perl
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#
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# (C) 2014 mchang@suse.com
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#
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# 2014-02-20 jw@suse.de
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use strict;
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my $grub2_dir;
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my $grub2_reboot;
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my $show_mapped;
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my $id_name;
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my @menuentry;
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sub parse_menuentry {
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my ($parent, $menu) = @_;
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my @m = $menu =~ /(submenu|menuentry) \s+ '([^']*)' .*? ( \{ (?: [^{}]* | (?3))* \} )/sxg;
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for (my $i = 0; $i <= $#m; $i += 3) {
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my $type = $m[$i];
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my $title = $m[$i+1];
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my $data = $m[$i+2];
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my $name = ($parent) ? "$parent>$title" : "$title";
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if ($type eq "menuentry") {
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push @menuentry, $name;
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} elsif ($type eq "submenu") {
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&parse_menuentry ($name, $data);
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}
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}
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}
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$id_name = "";
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if (@ARGV == 2 && ($ARGV[0] eq "--show-mapped")) {
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$show_mapped = 1;
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$id_name = $ARGV[1];
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} elsif (@ARGV == 1) {
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$show_mapped = 0;
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$id_name = $ARGV[0];
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}
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die "wrong command line options, try --help\n" if ($id_name eq "");
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open(SYSCONF, "</etc/sysconfig/bootloader") || die "cannot read bootloader sysconfig: $!\n";
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$grub2_dir = "";
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while (<SYSCONF>) {
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if (/LOADER_TYPE="(.*)"/) {
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my $bl = $1;
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if ($bl eq "grub2" || $bl eq "grub2-efi") {
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$grub2_dir = "/boot/grub2";
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$grub2_reboot = "/usr/sbin/grub2-reboot";
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}
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last;
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}
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}
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close (SYSCONF);
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if ($id_name eq "--help" or $id_name eq "-h")
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{
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print "Usage: grub2-once [--show-mapped ID | --list | ID | NAME_SUBSTRING ]\n";
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system "$grub2_reboot \"--help\"";
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exit 0;
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}
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die "no grub2_dir" if ($grub2_dir eq "");
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open(MENU, "<$grub2_dir/grub.cfg") || die "cannot read grub.cfg in $grub2_dir: $!\n";
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undef $/;
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while (<MENU>) {
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&parse_menuentry ("", $_);
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}
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close (MENU);
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my $ret = "";
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my $name = "";
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my $id = -1;
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if ($id_name eq '--list')
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{
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my $c = 0;
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foreach my $e (@menuentry)
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{
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printf "%6d %s\n", $c, $e;
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$c++;
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}
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exit 0;
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}
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if ($id_name =~ m!^[0-9]+$!) {
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if ($id_name < @menuentry) {
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$id = $id_name;
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$name = $menuentry[$id];
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$ret = $name;
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}
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} else {
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my $i = -1;
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my $c = 0;
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$name = $id_name;
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foreach my $e (@menuentry) {
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if ($e =~ qr!\Q$name\E!) {
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$i = $c;
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last;
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}
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} continue {
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++$c;
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}
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if ($i >= 0) {
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$id = $i;
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$name = $menuentry[$id];
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$ret = "$id";
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}
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}
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if ($show_mapped > 0) {
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print $ret;
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} else {
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system "$grub2_reboot \"$name\"";
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}
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