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d38b93ab | 1 | #!/usr/bin/perl |
2 | # | |
9028e234 IJ |
3 | # Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk> |
4 | # Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk> | |
5 | # Copyright 1999,2003 | |
6 | # Chancellor Masters and Scholars of the University of Cambridge | |
7 | # Copyright 2010 Tony Finch <fanf@dotat.at> | |
fe112c08 | 8 | # |
d38b93ab | 9 | # This is free software; you can redistribute it and/or modify it |
10 | # under the terms of the GNU General Public License as published by | |
9028e234 IJ |
11 | # the Free Software Foundation; either version 3 of the License, or |
12 | # (at your option) any later version. | |
fe112c08 | 13 | # |
9028e234 IJ |
14 | # This program is distributed in the hope that it will be useful, but |
15 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | # General Public License for more details. | |
fe112c08 | 18 | # |
9028e234 IJ |
19 | # You should have received a copy of the GNU General Public License |
20 | # along with userv-utils; if not, see http://www.gnu.org/licenses/. | |
d38b93ab | 21 | |
22 | sub usage { | |
23 | &unlock; | |
24 | &p_out; | |
25 | print(<<END) || die "groupmanage: write usage: $!\n"; | |
26 | groupmanage: $_[0] | |
27 | usage: | |
28 | groupmanage <groupname> [--info] | |
29 | groupmanage <groupname> <action> [<action> ...] | |
30 | groupmanage <groupname> --create [<action> <action> ...] | |
31 | actions: | |
32 | --clear | |
33 | --add <username> <username> ... | |
34 | --remove <username> <username> ... | |
35 | --manager-clear | |
36 | --manager-add <username> <username> ... | |
37 | --manager-remove <username> <username> ... | |
38 | --title <string> | |
39 | --owner <username> [root only] | |
fe112c08 | 40 | groupmanage is Copyright. It is free software, released under the GNU |
41 | GPL v2 or later. There is NO WARRANTY. See the GPL for details. | |
d38b93ab | 42 | END |
43 | exit(1); | |
44 | } | |
45 | ||
46 | @ARGV || &usage('too few arguments'); | |
47 | ||
48 | if ($>) { | |
49 | exec 'userv','root','groupmanage',@ARGV; | |
50 | &quit("unable to execute userv to gain root privilege: $!"); | |
51 | } | |
52 | ||
53 | chdir("/etc") || die "groupmanage: chdir /etc: $!\n"; | |
54 | ||
55 | $groupname= shift(@ARGV); | |
56 | $groupname =~ y/\n//d; | |
57 | ||
58 | $groupname =~ m/^\w[-0-9A-Za-z]*$/ || | |
59 | &quit("first argument is invalid - must be group name"); | |
60 | ||
61 | @ARGV || push(@ARGV,'--info'); | |
62 | ||
d38b93ab | 63 | $callinguser= exists $ENV{'USERV_UID'} ? $ENV{'USERV_UID'} : $<; |
64 | ||
65 | %opt= ('user-create','0', | |
66 | 'user-create-minunameu','5', | |
67 | 'user-create-min','10000', | |
68 | 'user-create-max','19999', | |
69 | 'user-create-nameintitle','0', | |
85dbc5e7 | 70 | 'user-create-maxperu','5', |
71 | 'group-file','group', | |
72 | 'gtmp-file','gtmp', | |
73 | 'grouplist-file','grouplist', | |
74 | 'name-regexp','', | |
8eac74ae | 75 | 'name-maxlen','8', |
85dbc5e7 | 76 | 'admin-group','', |
77 | 'finish-command',''); | |
d38b93ab | 78 | %ovalid= ('user-create','boolean', |
79 | 'user-create-minunameu','number', | |
80 | 'user-create-min','number', | |
81 | 'user-create-max','number', | |
82 | 'user-create-nameintitle','boolean', | |
85dbc5e7 | 83 | 'user-create-maxperu','number', |
84 | 'group-file','string', | |
85 | 'gtmp-file','string', | |
86 | 'grouplist-file','string', | |
87 | 'name-regexp','string', | |
8eac74ae | 88 | 'name-maxlen','number', |
85dbc5e7 | 89 | 'admin-group','string', |
90 | 'finish-command','string'); | |
d38b93ab | 91 | |
92 | sub ov_boolean { | |
93 | $cov= $_ eq 'yes' ? 1 : | |
94 | $_ eq 'no' ? 0 : | |
95 | &quit("groupmanage.conf:$.: bad boolean value"); | |
96 | } | |
97 | ||
98 | sub ov_number { | |
99 | m/^[0-9]{1,10}$/ || &quit("groupmanage.conf:$.: bad numerical value"); | |
100 | } | |
101 | ||
85dbc5e7 | 102 | sub ov_string { |
103 | ||
104 | } | |
105 | ||
d38b93ab | 106 | open(GMC,"groupmanage.conf") || &quit("read groupmanage.conf: $!"); |
107 | while (<GMC>) { | |
108 | next if m/^\#/ || !m/\S/; | |
109 | s/\s*\n$//; | |
110 | s/^\s*([-0-9a-z]+)\s*// || &quit("groupmanage.conf:$.: bad option format"); | |
111 | $co= $1; | |
112 | defined($opt{$co}) || &quit("groupmanage.conf:$.: unknown option $co"); | |
113 | $cov= $_; | |
114 | $ovf= 'ov_'.$ovalid{$co}; | |
115 | &$ovf; | |
116 | $opt{$co}= $cov; | |
117 | } | |
118 | close(GMC); | |
119 | ||
85dbc5e7 | 120 | if ($ARGV[0] eq '--info') { |
121 | @ARGV == 1 || &usage('no arguments allowed after --info'); | |
122 | &p_out; | |
123 | &load; | |
124 | &checkexists; | |
125 | &display; | |
126 | &p_out; | |
127 | exit(0); | |
128 | } | |
129 | ||
d38b93ab | 130 | sub naming { |
131 | $callinguser || return; | |
132 | &p_out; | |
85dbc5e7 | 133 | if ($opt{'user-create-minunameu'}) { |
134 | print(STDERR <<END) || &quit("write err re name: $!"); | |
d38b93ab | 135 | groupmanage: groups you create must be named after you ... |
136 | <usernamepart>-<identifier> | |
137 | You must quote at least $opt{'user-create-minunameu'} chars of your username $createby | |
138 | (or all of it if it is shorter). | |
139 | END | |
85dbc5e7 | 140 | } |
141 | if ($opt{'name-regexp'}) { | |
142 | print(STDERR <<END) || &quit("write err re name: $!"); | |
143 | groupmanage: groups you create must match a pattern... | |
144 | The pattern is the Perl regular expression /$opt{'name-regexp'}/. | |
145 | END | |
146 | } | |
d38b93ab | 147 | exit(1); |
148 | } | |
149 | ||
150 | if ($ARGV[0] eq '--create') { | |
151 | $opt{'user-create'} || !$callinguser || | |
152 | &quit("group creation by users disabled by administrator"); | |
8eac74ae | 153 | length($groupname) <= $opt{'name-maxlen'} || |
154 | &quit("group names must be $opt{'name-maxlen'} chars or fewer"); | |
d38b93ab | 155 | $!=0; (@pw= getpwuid($callinguser)) |
156 | || &quit("cannot get your passwd entry: $!"); | |
157 | $createby= $pw[0]; | |
85dbc5e7 | 158 | if ($opt{'user-create-minunameu'}) { |
159 | $groupname =~ m/^([-0-9A-Za-z]+)-([0-9a-z]+)$/ || &naming; | |
160 | $upart= $1; | |
161 | $idpart= $2; | |
162 | $upart eq $createby || | |
163 | (length($upart) >= $opt{'user-create-minunameu'} && | |
164 | substr($createby,0,length($upart)) eq $upart) | |
165 | || &naming; | |
166 | } else { | |
167 | $groupname =~ m/${opt{'name-regexp'}}/ || &naming; | |
168 | } | |
d38b93ab | 169 | $create= 1; |
170 | shift(@ARGV); | |
171 | } | |
172 | ||
173 | &lock; | |
174 | &load; | |
175 | ||
176 | if ($create) { | |
177 | $bythisowner < $opt{'user-create-maxperu'} || | |
178 | &quit("you already have $bythisowner group(s)"); | |
179 | $groupfileix==-1 || &quit("group already exists, cannot create it"); | |
180 | $grouplistix==-1 || &quit("group is already in grouplist, cannot create it"); | |
181 | for ($gid= $opt{'user-create-min'}; | |
182 | $gid < $opt{'user-create-max'} && defined(getgrgid($gid)); | |
183 | $gid++) { } | |
184 | $gid <= $opt{'user-create-max'} || &quit("out of gids to use, contact admin"); | |
185 | $password=''; @members=($createby); | |
186 | $description= "${createby}'s -- user-defined, no title"; | |
187 | $owner= $createby; @managers=(); @members= ($createby); | |
188 | $groupfileix=$#groupfile+1; | |
189 | $grouplistix=$#grouplist+1; | |
190 | &p("created group $groupname"); | |
191 | } else { | |
192 | &checkexists; | |
193 | &p("modifying group $groupname"); | |
194 | } | |
195 | ||
196 | &weare($owner) || grep(&weare($_),@managers) || !$callinguser || | |
197 | &quit("you may not manage $groupname"); | |
198 | ||
199 | $action= 'none'; | |
200 | while (@ARGV) { | |
201 | $_= shift(@ARGV); | |
202 | if (m/^--(add|remove)$/) { | |
203 | $action= $1; $clist= 'members'; $what= 'member'; | |
204 | } elsif (m/^--owner$/) { | |
205 | !$callinguser || &quit("only root may change owner"); | |
206 | @ARGV || &usage("no username owner after --owner"); | |
207 | $owner= shift(@ARGV); | |
208 | &p("owner set to $owner"); | |
209 | } elsif (m/^--manager-(add|remove)$/) { | |
210 | $action= $1; $clist= 'managers'; $what= 'manager'; | |
211 | } elsif (m/^--clear$/) { | |
212 | &p('cleared list of members'); | |
213 | @members=(); $action='none'; $memc++; | |
214 | } elsif (m/^--manager-clear$/) { | |
215 | &p('cleared list of managers'); | |
216 | @managers=(); $action='none'; | |
217 | } elsif (m/^--title$/) { | |
218 | &weare($owner) || !$callinguser || | |
219 | &quit("only group's owner ($owner) may change title"); | |
220 | @ARGV || &usage("no title after --title"); | |
221 | $_= shift(@ARGV); y/\020-\176//cd; y/:\\//d; | |
222 | if ($opt{'user-create-nameintitle'} && | |
223 | $gid >= $opt{'user-create-min'} && $gid <= $opt{'user-create-max'}) { | |
224 | $_= "${owner}'s -- $_"; | |
225 | } | |
226 | $description= $_; | |
227 | &p("title set to $description"); | |
228 | } elsif (m/^-/) { | |
229 | &usage("unknown option $_"); | |
230 | } elsif (m/^\w[-0-9A-Za-z]*$/) { | |
231 | y/\n//d; | |
232 | $chgu=$_; | |
6e56f231 | 233 | defined(getpwnam($chgu)) || &quit("username $chgu does not exist"); |
d38b93ab | 234 | eval "\@l = \@$clist; 1" || &quit("internal error: $@"); |
235 | $already= grep($_ eq $chgu, @l); | |
236 | if ($action eq 'add') { | |
237 | if ($already) { | |
238 | &p("$chgu already $what"); | |
239 | } else { | |
240 | &p("added $what $chgu"); | |
241 | push(@l,$chgu); | |
242 | $memc+= ($clist eq 'members'); | |
243 | } | |
244 | } elsif ($action eq 'remove') { | |
245 | if ($already) { | |
246 | &p("removed $what $chgu"); | |
247 | @l= grep($_ ne $chgu, @l); | |
248 | $memc+= ($clist eq 'members'); | |
249 | } else { | |
250 | &p("$chgu is already not $what"); | |
251 | } | |
252 | } else { | |
253 | &usage("username found but no action to take for them"); | |
254 | } | |
255 | eval "\@$clist = \@l; 1" || &quit("internal error: $@"); | |
256 | } else { | |
257 | &usage("bad username or option $_"); | |
258 | } | |
259 | } | |
260 | &p("nb: a change to group membership only takes effect at the user's next login") | |
261 | if $memc; | |
262 | $groupfile[$groupfileix]= | |
263 | "$groupname:$password:$gid:".join(',',@members)."\n"; | |
264 | $grouplist[$grouplistix]= | |
265 | "$groupname:$description:$owner:".join(',',@managers).":$homedir\n"; | |
85dbc5e7 | 266 | &save($opt{'group-file'},@groupfile); |
267 | &save($opt{'grouplist-file'},@grouplist); | |
268 | if ($opt{'finish-command'}) { | |
2af9fec9 | 269 | !system($opt{'finish-command'}) || &quit("finish-command: $?"); |
85dbc5e7 | 270 | } |
271 | unlink($opt{'gtmp-file'}) || &quit("unlock group (remove gtmp): $!"); | |
d38b93ab | 272 | &p_out; |
273 | exit(0); | |
274 | ||
275 | sub load { | |
85dbc5e7 | 276 | open(GF,"< $opt{'group-file'}") || &quit("read group: $!"); |
d38b93ab | 277 | @groupfile=<GF>; close(GF); |
278 | $groupfileix=-1; | |
279 | for ($i=0; $i<=$#groupfile; $i++) { | |
280 | $_= $groupfile[$i]; s/\n$//; | |
281 | next if m/^\#/; | |
282 | m/^(\w[-0-9A-Za-z]*):([^:]*):(\d+):([-0-9A-Za-z,]*)$/ || | |
283 | &quit("bad entry in group: $_"); | |
284 | $gname2gid{$1}=$3; | |
285 | next unless $1 eq $groupname; | |
286 | $groupfileix<0 || &quit("duplicate entries in group"); | |
287 | $groupfileix= $i; | |
288 | $password= $2; | |
289 | $gid= $3; | |
290 | @members= split(/,/,$4); | |
291 | } | |
85dbc5e7 | 292 | open(GL,"< $opt{'grouplist-file'}") || &quit("read grouplist: $!"); |
d38b93ab | 293 | @grouplist=<GL>; close(GL); |
294 | $grouplistix=-1; | |
295 | for ($i=0; $i<=$#grouplist; $i++) { | |
296 | $_= $grouplist[$i]; s/\n$//; | |
297 | next if m/^\#/; | |
298 | m/^(\w[-0-9A-Za-z]*):([^:]*):(\w[-0-9A-Za-z]*):([-0-9A-Za-z,]*):([^:]*)$/ || | |
299 | &quit("bad entry in grouplist: $_"); | |
300 | $bythisowner++ if ($create && $3 eq $createby && | |
301 | $gname2gid{$1} >= $opt{'user-create-min'} && | |
302 | $gname2gid{$1} <= $opt{'user-create-max'}); | |
303 | next unless $1 eq $groupname; | |
304 | $grouplistix<0 || &quit("duplicate entries in grouplist"); | |
305 | $grouplistix= $i; | |
306 | $description= $2; | |
307 | $owner= $3; | |
308 | $homedir= $5; | |
309 | @managers= split(/,/,$4); | |
310 | } | |
311 | } | |
312 | ||
313 | sub checkexists { | |
314 | $grouplistix>=0 || &quit("no entry in grouplist for $groupname"); | |
315 | $groupfileix>=0 || &quit("no entry in group for $groupname"); | |
316 | } | |
317 | ||
318 | sub weare { | |
319 | return 0 if $_[0] eq ''; | |
320 | @pw= getpwnam($_[0]); | |
321 | return @pw && $pw[2] == $callinguser ? 1 : 0; | |
322 | } | |
323 | ||
324 | sub save { | |
325 | $filename= shift(@_); | |
326 | unlink("$filename~"); | |
327 | open(DUMP,"> $filename.new") || &quit("create new $filename: $!"); | |
328 | print(DUMP @_) || &quit("write new $filename: $!"); | |
329 | close(DUMP) || &quit("close new $filename: $!"); | |
330 | link("$filename","$filename~") || &quit("create backup $filename: $!"); | |
331 | rename("$filename.new","$filename") || &quit("install new $filename: $!"); | |
332 | } | |
333 | ||
334 | sub quit { | |
335 | &unlock; | |
336 | &p_out; | |
337 | die "groupmanage: @_\n"; | |
338 | } | |
339 | ||
340 | sub lock { | |
2af9fec9 | 341 | link($opt{'group-file'},$opt{'gtmp-file'}) || &quit("create gtmp: $!"); |
d38b93ab | 342 | $locked++; |
343 | } | |
344 | ||
345 | sub unlock { | |
346 | return unless $locked; | |
347 | $locked--; | |
85dbc5e7 | 348 | unlink($opt{'gtmp-file'}) || warn("unlock group file (remove gtmp): $!\n"); |
d38b93ab | 349 | } |
350 | ||
351 | sub display { | |
352 | print(<<END) || &quit("write to stdout: $!\n"); | |
353 | group $groupname | |
354 | gid $gid | |
355 | description $description | |
356 | owner $owner | |
357 | managers @managers | |
358 | members @members | |
359 | homedir $homedir | |
360 | END | |
361 | } | |
362 | ||
363 | sub p_out { | |
364 | print(STDOUT "$stdout_string") || &quit("write to stdout: $!\n"); | |
365 | $stdout_string= ''; | |
366 | } | |
367 | ||
368 | sub p { | |
369 | $stdout_string.= $_[0]."\n"; | |
370 | } |