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1 | #!/usr/bin/perl |
2 | # |
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3 | # Copyright (C) 1995-9, 2003 Ian Jackson <ijackson@chiark.greenend.org.uk> |
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4 | # Copyright (C) 1999, 2003 |
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5 | # Chancellor Masters and Scholars of the University of Cambridge |
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6 | # |
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7 | # Improved by Ben Harris <bjh21@cam.ac.uk> in 1999 and 2003 for Unix |
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8 | # Support's own nefarious purposes. |
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9 | # |
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10 | # This is free software; you can redistribute it and/or modify it |
11 | # under the terms of the GNU General Public License as published by |
12 | # the Free Software Foundation; either version 2, or (at your option) |
13 | # any later version. |
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14 | # |
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15 | # It is distributed in the hope that it will be useful, |
16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | # GNU General Public License for more details. |
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19 | # |
20 | # $Id$ |
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21 | |
22 | sub usage { |
23 | &unlock; |
24 | &p_out; |
25 | print(<<END) || die "groupmanage: write usage: $!\n"; |
26 | groupmanage: $_[0] |
27 | usage: |
28 | groupmanage <groupname> [--info] |
29 | groupmanage <groupname> <action> [<action> ...] |
30 | groupmanage <groupname> --create [<action> <action> ...] |
31 | actions: |
32 | --clear |
33 | --add <username> <username> ... |
34 | --remove <username> <username> ... |
35 | --manager-clear |
36 | --manager-add <username> <username> ... |
37 | --manager-remove <username> <username> ... |
38 | --title <string> |
39 | --owner <username> [root only] |
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40 | groupmanage is Copyright. It is free software, released under the GNU |
41 | GPL v2 or later. There is NO WARRANTY. See the GPL for details. |
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42 | END |
43 | exit(1); |
44 | } |
45 | |
46 | @ARGV || &usage('too few arguments'); |
47 | |
48 | if ($>) { |
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 | |
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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', |
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70 | 'user-create-maxperu','5', |
71 | 'group-file','group', |
72 | 'gtmp-file','gtmp', |
73 | 'grouplist-file','grouplist', |
74 | 'name-regexp','', |
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75 | 'name-maxlen','8', |
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76 | 'admin-group','', |
77 | 'finish-command',''); |
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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', |
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83 | 'user-create-maxperu','number', |
84 | 'group-file','string', |
85 | 'gtmp-file','string', |
86 | 'grouplist-file','string', |
87 | 'name-regexp','string', |
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88 | 'name-maxlen','number', |
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89 | 'admin-group','string', |
90 | 'finish-command','string'); |
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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 | |
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102 | sub ov_string { |
103 | |
104 | } |
105 | |
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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}= $cov; |
117 | } |
118 | close(GMC); |
119 | |
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120 | if ($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 | |
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130 | sub naming { |
131 | $callinguser || return; |
132 | &p_out; |
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133 | if ($opt{'user-create-minunameu'}) { |
134 | print(STDERR <<END) || &quit("write err re name: $!"); |
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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 $createby |
138 | (or all of it if it is shorter). |
139 | END |
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140 | } |
141 | if ($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 | } |
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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"); |
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153 | length($groupname) <= $opt{'name-maxlen'} || |
154 | &quit("group names must be $opt{'name-maxlen'} chars or fewer"); |
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155 | $!=0; (@pw= getpwuid($callinguser)) |
156 | || &quit("cannot get your passwd entry: $!"); |
157 | $createby= $pw[0]; |
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158 | if ($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 | } |
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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 | $chgu=$_; |
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233 | defined(getpwnam($chgu)) || &quit("username $chgu does not exist"); |
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234 | eval "\@l = \@$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"; |
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266 | &save($opt{'group-file'},@groupfile); |
267 | &save($opt{'grouplist-file'},@grouplist); |
268 | if ($opt{'finish-command'}) { |
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269 | !system($opt{'finish-command'}) || &quit("finish-command: $?"); |
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270 | } |
271 | unlink($opt{'gtmp-file'}) || &quit("unlock group (remove gtmp): $!"); |
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272 | &p_out; |
273 | exit(0); |
274 | |
275 | sub load { |
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276 | open(GF,"< $opt{'group-file'}") || &quit("read group: $!"); |
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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 | } |
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292 | open(GL,"< $opt{'grouplist-file'}") || &quit("read grouplist: $!"); |
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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: $!"); |
332 | } |
333 | |
334 | sub quit { |
335 | &unlock; |
336 | &p_out; |
337 | die "groupmanage: @_\n"; |
338 | } |
339 | |
340 | sub lock { |
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341 | link($opt{'group-file'},$opt{'gtmp-file'}) || &quit("create gtmp: $!"); |
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342 | $locked++; |
343 | } |
344 | |
345 | sub unlock { |
346 | return unless $locked; |
347 | $locked--; |
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348 | unlink($opt{'gtmp-file'}) || warn("unlock group file (remove gtmp): $!\n"); |
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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 | } |