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d612d62c AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | *) | |
18 | ||
19 | (* Code for receiving and executing configuration files *) | |
20 | ||
21 | structure Slave :> SLAVE = struct | |
22 | ||
23 | datatype file_action = | |
24 | Add | |
1638d5a2 | 25 | | Delete of bool |
d612d62c AC |
26 | | Modify |
27 | ||
1638d5a2 AC |
28 | fun isDelete (Delete _) = true |
29 | | isDelete _ = false | |
30 | ||
d612d62c AC |
31 | type file_status = {action : file_action, |
32 | domain : string, | |
6ae327f8 | 33 | dir : string, |
d612d62c | 34 | file : string} |
36e42cb8 | 35 | |
d612d62c AC |
36 | val fileHandler = ref (fn _ : file_status => ()) |
37 | val preHandler = ref (fn () => ()) | |
38 | val postHandler = ref (fn () => ()) | |
39 | ||
40 | fun registerFileHandler handler = | |
41 | let | |
42 | val old = !fileHandler | |
43 | in | |
44 | fileHandler := (fn x => (handler x; old x)) | |
45 | end | |
46 | ||
47 | fun registerPreHandler handler = | |
48 | let | |
49 | val old = !preHandler | |
50 | in | |
51 | preHandler := (fn () => (handler (); old ())) | |
52 | end | |
53 | ||
54 | fun registerPostHandler handler = | |
55 | let | |
56 | val old = !postHandler | |
57 | in | |
58 | postHandler := (fn () => (handler (); old ())) | |
59 | end | |
60 | ||
61 | fun handleChanges fs = (!preHandler (); | |
c189cbe9 AC |
62 | app (fn recd as {action, file, ...} => |
63 | (!fileHandler recd; | |
1638d5a2 AC |
64 | case action of |
65 | Delete b => | |
66 | if b andalso Posix.FileSys.access (file, []) then | |
67 | OS.FileSys.remove file | |
68 | else | |
69 | () | |
70 | | _ => ())) fs; | |
d612d62c AC |
71 | !postHandler ()) |
72 | ||
8df2e702 AC |
73 | fun shell ss = OS.Process.isSuccess (OS.Process.system (String.concat ss)) |
74 | ||
75 | fun shellF (ss, msg) = | |
76 | let | |
77 | val s = String.concat ss | |
78 | in | |
79 | if OS.Process.isSuccess (OS.Process.system s) then | |
80 | () | |
81 | else | |
82 | ErrorMsg.error NONE (msg s) | |
83 | end | |
84 | ||
6e62228d AC |
85 | fun hostname () = |
86 | let | |
87 | val inf = TextIO.openIn "/etc/hostname" | |
88 | in | |
89 | case TextIO.inputLine inf of | |
90 | NONE => (TextIO.closeIn inf; raise Fail "No line in /etc/hostname") | |
91 | | SOME line => (TextIO.closeIn inf; String.substring (line, 0, size line - 1)) | |
92 | end | |
93 | ||
8df2e702 AC |
94 | fun concatTo p fname = |
95 | let | |
96 | fun visitDir dname = | |
97 | let | |
98 | val dir = Posix.FileSys.opendir dname | |
99 | ||
100 | fun loop () = | |
101 | case Posix.FileSys.readdir dir of | |
102 | NONE => Posix.FileSys.closedir dir | |
103 | | SOME fname' => | |
104 | let | |
105 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} | |
106 | in | |
107 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then | |
108 | visitDir path | |
109 | else if p fname' then | |
110 | shellF ([Config.cat, " ", path, " >>", fname], | |
6ae327f8 | 111 | fn cl => "Error concatenating: " ^ cl) |
8df2e702 AC |
112 | else |
113 | (); | |
114 | loop () | |
115 | end | |
116 | in | |
8df2e702 AC |
117 | loop () |
118 | end | |
119 | in | |
6ae327f8 | 120 | TextIO.closeOut (TextIO.openOut fname); |
6e62228d | 121 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}) |
8df2e702 AC |
122 | end |
123 | ||
ed9fda3a AC |
124 | fun enumerateTo p sep fname = |
125 | let | |
126 | val outf = TextIO.openOut fname | |
127 | ||
128 | val first = ref true | |
e0b0abd2 | 129 | val baseLen = length (String.fields (fn ch => ch = #"/") Config.resultRoot) + 1 |
ed9fda3a AC |
130 | |
131 | fun visitDir dname = | |
132 | let | |
133 | val dir = Posix.FileSys.opendir dname | |
134 | ||
135 | fun loop () = | |
136 | case Posix.FileSys.readdir dir of | |
137 | NONE => Posix.FileSys.closedir dir | |
138 | | SOME fname' => | |
139 | let | |
140 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} | |
141 | in | |
142 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then | |
143 | visitDir path | |
144 | else if p fname' then | |
145 | let | |
146 | val toks = String.fields (fn ch => ch = #"/") dname | |
147 | val toks = List.drop (toks, baseLen) | |
148 | val dom = String.concatWith "." (rev toks) | |
149 | in | |
150 | if !first then | |
151 | first := false | |
152 | else | |
153 | TextIO.output (outf, sep); | |
154 | TextIO.output (outf, dom) | |
155 | end | |
156 | else | |
157 | (); | |
158 | loop () | |
159 | end | |
160 | in | |
161 | loop () | |
162 | end | |
163 | in | |
6e62228d | 164 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}); |
ed9fda3a AC |
165 | TextIO.closeOut outf |
166 | end | |
167 | ||
7db53a0b AC |
168 | fun readList fname = |
169 | let | |
170 | val inf = TextIO.openIn fname | |
171 | ||
172 | fun loop acc = | |
173 | case TextIO.inputLine inf of | |
174 | NONE => rev acc | |
175 | | SOME line => loop (String.substring (line, 0, size line - 1) :: acc) | |
176 | in | |
177 | loop [] | |
178 | before TextIO.closeIn inf | |
179 | end | |
180 | ||
181 | fun writeList (fname, ls) = | |
182 | let | |
183 | val outf = TextIO.openOut fname | |
184 | in | |
185 | app (fn s => (TextIO.output (outf, s); | |
186 | TextIO.output1 (outf, #"\n"))) ls; | |
187 | TextIO.closeOut outf | |
188 | end | |
189 | ||
d351d679 AC |
190 | fun lineInFile fname line = |
191 | let | |
192 | val inf = TextIO.openIn fname | |
193 | val line' = line ^ "\n" | |
194 | ||
195 | fun loop () = | |
196 | case TextIO.inputLine inf of | |
197 | NONE => false | |
198 | | SOME line => line = line' orelse loop () | |
199 | in | |
200 | loop () | |
201 | before TextIO.closeIn inf | |
202 | end handle IO.Io _ => false | |
203 | ||
737c68d4 AC |
204 | fun inGroup {user, group} = |
205 | List.exists (fn x => x = user) | |
206 | (Posix.SysDB.Group.members (Posix.SysDB.getgrnam group)) | |
207 | handle OS.SysErr _ => false | |
208 | ||
409542d7 AC |
209 | fun mkDirAll dir = ignore (OS.Process.system ("mkdir -p " ^ dir)) |
210 | ||
e0b80e65 AC |
211 | fun remove (ls, x) = List.filter (fn y => y <> x) ls |
212 | fun removeDups ls = List.foldr (fn (x, ls) => | |
213 | if List.exists (fn y => y = x) ls then | |
214 | ls | |
215 | else | |
216 | x :: ls) [] ls | |
217 | ||
31b50af0 AC |
218 | fun moveDirCreate {from, to} = |
219 | (mkDirAll to; | |
220 | if Posix.FileSys.access (from, []) then | |
c17d0537 AC |
221 | (ignore (OS.Process.system ("rm -rf " ^ to)); |
222 | ignore (OS.Process.system ("cp -r " ^ from ^ " " ^ to)); | |
223 | ignore (OS.Process.system ("rm -rf " ^ from))) | |
31b50af0 AC |
224 | else |
225 | ()) | |
226 | ||
d612d62c | 227 | end |