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|
#!/usr/bin/perl
#
use strict;
use Getopt::Long;
use Cwd qw(abs_path);
my $opt_help = 0;
my $opt_path = undef;
my $opt_action = undef;
my $opt_type = undef;
my $opt_name = undef;
my $passwdfn = undef;
my $groupfn = undef;
my $actionfn = undef;
sub passwd_add($$);
sub passwd_delete($$);
sub group_add($$);
sub group_delete($$);
my $result = GetOptions(
'help|h|?' => \$opt_help,
'path=s' => \$opt_path,
'action=s' => \$opt_action,
'type=s' => \$opt_type,
'name=s' => \$opt_name
);
sub usage($;$)
{
my ($ret, $msg) = @_;
print $msg."\n\n" if defined($msg);
print "usage:
--help|-h|-? Show this help.
--path <path> Path of the 'passwd' or 'group' file.
--type <type> Only 'passwd' is supported yet,
but 'group' and maybe 'member' will be added
in future.
--action <action> 'add' or 'delete'.
--name <name> The name of the object.
";
exit($ret);
}
usage(1) if (not $result);
usage(0) if ($opt_help);
if (not defined($opt_path)) {
usage(1, "missing: --path <path>");
}
if ($opt_path eq "" or $opt_path eq "/") {
usage(1, "invalid: --path <path>: '$opt_path'");
}
my $opt_fullpath = abs_path($opt_path);
if (not defined($opt_fullpath)) {
usage(1, "invalid: --path <path>: '$opt_path'");
}
if (not defined($opt_action)) {
usage(1, "missing: --action [add|delete]");
}
if ($opt_action eq "add") {
$passwdfn = \&passwd_add;
$groupfn = \&group_add;
} elsif ($opt_action eq "delete") {
$passwdfn = \&passwd_delete;
$groupfn = \&group_delete;
} else {
usage(1, "invalid: --action [add|delete]: '$opt_action'");
}
if (not defined($opt_type)) {
usage(1, "missing: --type [passwd|group]");
}
if ($opt_type eq "passwd") {
$actionfn = $passwdfn;
} elsif ($opt_type eq "group") {
$actionfn = $groupfn;
} else {
usage(1, "invalid: --type [passwd|group]: '$opt_type'")
}
if (not defined($opt_name)) {
usage(1, "missing: --name <name>");
}
if ($opt_name eq "") {
usage(1, "invalid: --name <name>");
}
exit $actionfn->($opt_fullpath, $opt_name);
sub passwd_add_entry($$);
sub passwd_load($)
{
my ($path) = @_;
my @lines;
my $passwd = undef;
open(PWD, "<$path") or die("Unable to open '$path' for read");
@lines = <PWD>;
close(PWD);
$passwd->{array} = ();
$passwd->{name} = {};
$passwd->{uid} = {};
$passwd->{path} = $path;
foreach my $line (@lines) {
passwd_add_entry($passwd, $line);
}
return $passwd;
}
sub passwd_lookup_name($$)
{
my ($passwd, $name) = @_;
return undef unless defined($passwd->{name}{$name});
return $passwd->{name}{$name};
}
sub passwd_lookup_uid($$)
{
my ($passwd, $uid) = @_;
return undef unless defined($passwd->{uid}{$uid});
return $passwd->{uid}{$uid};
}
sub passwd_get_free_uid($)
{
my ($passwd) = @_;
my $uid = 1000;
while (passwd_lookup_uid($passwd, $uid)) {
$uid++;
}
return $uid;
}
sub passwd_add_entry($$)
{
my ($passwd, $str) = @_;
chomp $str;
my @e = split(':', $str);
push(@{$passwd->{array}}, \@e);
$passwd->{name}{$e[0]} = \@e;
$passwd->{uid}{$e[2]} = \@e;
}
sub passwd_remove_entry($$)
{
my ($passwd, $eref) = @_;
for(my $i; defined($passwd->{array}[$i]); $i++) {
if ($eref == $passwd->{array}[$i]) {
$passwd->{array}[$i] = undef;
}
}
delete $passwd->{name}{${$eref}[0]};
delete $passwd->{uid}{${$eref}[2]};
}
sub passwd_save($)
{
my ($passwd) = @_;
my @lines = ();
my $path = $passwd->{path};
my $tmppath = $path.$$;
foreach my $eref (@{$passwd->{array}}) {
next unless defined($eref);
my $line = join(':', @{$eref});
push(@lines, $line);
}
open(PWD, ">$tmppath") or die("Unable to open '$tmppath' for write");
print PWD join("\n", @lines)."\n";
close(PWD);
rename($tmppath, $path) or die("Unable to rename $tmppath => $path");
}
sub passwd_add($$)
{
my ($path, $name) = @_;
#print "passwd_add: '$name' in '$path'\n";
my $passwd = passwd_load($path);
my $e = passwd_lookup_name($passwd, $name);
die("account[$name] already exists in '$path'") if defined($e);
my $uid = passwd_get_free_uid($passwd);
my $gid = 65534;# nogroup gid
my $pwent = $name.":x:".$uid.":".$gid.":".$name." gecos:/nodir:/bin/false";
passwd_add_entry($passwd, $pwent);
passwd_save($passwd);
return 0;
}
sub passwd_delete($$)
{
my ($path, $name) = @_;
#print "passwd_delete: '$name' in '$path'\n";
my $passwd = passwd_load($path);
my $e = passwd_lookup_name($passwd, $name);
die("account[$name] does not exists in '$path'") unless defined($e);
passwd_remove_entry($passwd, $e);
passwd_save($passwd);
return 0;
}
sub group_add($$)
{
my ($path, $name) = @_;
#print "group_add: '$name' in '$path'\n";
die("group_add: not implemented yet!");
return 0;
}
sub group_delete($$)
{
my ($path, $name) = @_;
#print "group_delete: '$name' in '$path'\n";
die("group_delete: not implemented yet!");
return 0;
}
|
