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| Current File : //usr/bin/webmin |
#!/usr/bin/env perl
# Webmin CLI - Allows performing a variety of common Webmin-related
# functions on the command line.
use strict;
use warnings;
BEGIN { $Pod::Usage::Formatter = 'Pod::Text::Color'; }
use 5.010; # Version in CentOS 6
use Getopt::Long qw(:config permute pass_through);
use Pod::Usage;
use Term::ANSIColor qw(:constants);
use File::Spec;
use File::Basename;
sub main {
my ( %opt, $subcmd );
GetOptions(
'help|h' => \$opt{'help'},
'config|c=s' => \$opt{'config'},
'list-commands|l' => \$opt{'list'},
'describe|d' => \$opt{'describe'},
'man|m' => \$opt{'man'},
'<>' => sub {
# Handle unrecognized options, inc. subcommands.
my($arg) = @_;
if ($arg =~ m{^-}) {
say "Usage error: Unknown option $arg.";
pod2usage(0);
} else {
# It must be a subcommand.
$subcmd = $arg;
die "!FINISH";
}
}
);
$opt{'config'} ||= "/etc/webmin";
my @remain = @ARGV;
# List commands?
if ($opt{'list'}) {
list_commands(\%opt);
exit 0;
} elsif ($opt{'man'} || $opt{'help'} || !defined($remain[0])) {
# Show the full manual page
man_command(\%opt, $subcmd);
exit 0;
} elsif ($subcmd) {
run_command( \%opt, $subcmd, \@remain );
}
exit 0;
}
exit main( \@ARGV ) if !caller(0);
# run_command - Run a subcommand
# $optref is a reference to an options object passed down from global options
# like --help or a --config path.
sub run_command {
my ( $optref, $subcmd, $remainref ) = @_;
# Figure out the Webmin root directory
my $root = root($optref->{'config'});
my (@commands) = list_commands($optref);
if (! grep( /^$subcmd$/, @commands ) ) {
say RED, "Error: ", RESET, "Command \`$subcmd\` doesn't exist", RESET;
exit 1;
}
my $command_path = get_command_path($root, $subcmd);
# Merge the options
# Only handling config, right now...
# XXX Should we do this with libraries instead of commands?
# Maybe detect .pm for that possibility.
my @allopts = ("--config", "$optref->{'config'}", @$remainref);
# Run that binch
system($command_path, @allopts);
# Try to exit with the passed through exit code (rarely used, but
# why not?)
if ($? == -1) {
say RED, "Error: ", RESET, "Failed to execute \`$command_path\`: $!";
exit 1;
} else {
exit $? >> 8;
}
}
sub get_command_path {
my ($root, $subcmd) = @_;
# Check for a root-level command (in "$root/bin")
my $command_path;
if ($subcmd) {
$command_path = File::Spec->catfile($root, 'bin', $subcmd);
} else {
$command_path = File::Spec->catfile($root, 'bin', 'webmin');
}
my $module_name;
my $command;
if ( -x $command_path) {
$command = $command_path;
} else {
# Try to extract a module name from the command
# Get list of directories
opendir (my $DIR, $root);
my @module_dirs = grep { -d "$root/$_" } readdir($DIR);
# See if any of them are a substring of $subcmd
for my $dir (@module_dirs) {
if (index($subcmd, $dir) == 0) {
$module_name = $dir;
my $barecmd = substr($subcmd, -(length($subcmd)-length($module_name)-1));
$command = File::Spec->catfile($root, $dir, 'bin', $barecmd);
# Could be .pl or no extension
if ( -x $command ) {
last;
} elsif ( -x $command . ".pl" ) {
$command = $command . ".pl";
last;
}
}
}
}
if ($command) {
return $command;
} else {
die RED, "Unrecognized subcommand: $subcmd", RESET;
}
}
sub list_commands {
my ($optref) = @_;
my $root = root($optref->{'config'});
my @commands;
# Find and list global commands
for my $command (glob ("$root/bin/*")) {
my ($bin, $path) = fileparse($command);
if ($bin =~ "webmin") {
next;
}
if ($optref->{'describe'}) {
# Display name and description
say YELLOW, "$bin", RESET;
pod2usage( -verbose => 99,
-sections => [ qw(DESCRIPTION) ],
-input => $command,
-exitval => "NOEXIT");
} else {
if (wantarray) {
push(@commands, $bin);
} else {
# Just list the names
say "$bin";
}
}
}
my @modules;
# Find all module directories with something in bin
for my $command (glob ("$root/*/bin/*")) {
my ($bin, $path) = fileparse($command);
my $module = (split /\//, $path)[-2];
if ($optref->{'describe'}) {
# Display name and description
say YELLOW, "$module-$bin", RESET;
pod2usage( -verbose => 99,
-sections => [ qw(DESCRIPTION) ],
-input => $command,
-exitval => "NOEXIT");
} else {
if (wantarray) {
push(@modules, "$module-$bin");
} else {
# Just list the names
say "$module-$bin";
}
}
}
if (wantarray) {
return (@commands, @modules);
}
}
# Display either a short usage message (--help) or a full manual (--man)
sub man_command {
my ($optref, $subcmd) = @_;
my $root = root($optref->{'config'});
my $command_path = get_command_path($root, $subcmd);
$ENV{'PAGER'} ||= "more";
open(my $PAGER, "|-", "$ENV{'PAGER'}");
if ($optref->{'help'}) {
pod2usage( -input => $command_path );
} else {
pod2usage( -verbose => 99,
-input => $command_path,
-output => $PAGER);
}
}
sub root {
my ($config) = @_;
open(my $CONF, "<", "$config/miniserv.conf") || die RED,
"Failed to open $config/miniserv.conf", RESET;
my $root;
while (<$CONF>) {
if (/^root=(.*)/) {
$root = $1;
}
}
close($CONF);
# Does the Webmin root exist?
if ( $root ) {
die "$root is not a directory. Is --config correct?" unless (-d $root);
} else {
die "Unable to determine Webmin installation directory from $ENV{'WEBMIN_CONFIG'}";
}
return $root;
}
1;
=pod
=head1 NAME
webmin
=head1 DESCRIPTION
Webmin CLI command to perform many common Webmin tasks from the command line or from scripts.
=head1 SYNOPSIS
webmin [options] subcommand [subcommand options]
=head1 OPTIONS
=over
=item --help, -h
Print this usage summary and exit. Subcommands may also have a usage summary.
=item --config <path>, -c <path>
Specify the full path to the Webmin configuration directory. Defaults to
C</etc/webmin>.
=item --list-commands, -l
List available subcommands.
=item --describe, -d
When listing commands, briefly describe what they do.
=item --man <command>, -m <command>
Display the manual page for the given subcommand.
=back
=head1 EXIT CODES
0 on success
non-0 on error
=head1 LICENSE AND COPYRIGHT
Copyright 2020 Jamie Cameron <jcameron@webmin.com>, Joe Cooper
<joe@virtualmin.com>.