1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
#!/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($$)
{
my ($passwd, $eref) = @_;
for (my $i = 0; defined($passwd->{array}[$i]); $i++) {
if ($eref == $passwd->{array}[$i]) {
$passwd->{array}[$i] = undef;
}
}
delete $passwd->{name}{${$eref}[0]};
delete $passwd->{uid}{${$eref}[2]};
}
sub passwd_save($)
{
my ($passwd) = @_;
my @lines = ();
my $path = $passwd->{path};
my $tmppath = $path.$$;
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;
}
|
