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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 |
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25 | | Delete of bool |
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26 | | Modify |
27 | |
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28 | fun isDelete (Delete _) = true |
29 | | isDelete _ = false |
30 | |
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31 | type file_status = {action : file_action, |
32 | domain : string, |
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33 | dir : string, |
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34 | file : string} |
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35 | |
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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 (); |
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62 | app (fn recd as {action, file, ...} => |
63 | (!fileHandler recd; |
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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; |
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71 | !postHandler ()) |
72 | |
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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 | |
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85 | fun shellOutput ss = |
86 | let |
87 | val proc = Unix.execute ("/bin/bash", ["-c", String.concat ss ^ " 2>&1"]) |
88 | val inf = Unix.textInstreamOf proc |
89 | |
90 | fun loop out = |
91 | case TextIO.inputLine inf of |
92 | NONE => String.concat (rev out) |
93 | | SOME line => loop (line :: out) |
94 | |
95 | val lines = loop [] |
96 | in |
97 | print lines; |
98 | if OS.Process.isSuccess (Unix.reap proc) then |
99 | NONE |
100 | else |
101 | SOME lines |
102 | end |
103 | |
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104 | fun hostname () = |
105 | let |
106 | val inf = TextIO.openIn "/etc/hostname" |
107 | in |
108 | case TextIO.inputLine inf of |
109 | NONE => (TextIO.closeIn inf; raise Fail "No line in /etc/hostname") |
110 | | SOME line => (TextIO.closeIn inf; String.substring (line, 0, size line - 1)) |
111 | end |
112 | |
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113 | fun concatTo p fname = |
114 | let |
115 | fun visitDir dname = |
116 | let |
117 | val dir = Posix.FileSys.opendir dname |
118 | |
119 | fun loop () = |
120 | case Posix.FileSys.readdir dir of |
121 | NONE => Posix.FileSys.closedir dir |
122 | | SOME fname' => |
123 | let |
124 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
125 | in |
126 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
127 | visitDir path |
128 | else if p fname' then |
129 | shellF ([Config.cat, " ", path, " >>", fname], |
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130 | fn cl => "Error concatenating: " ^ cl) |
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131 | else |
132 | (); |
133 | loop () |
134 | end |
135 | in |
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136 | loop () |
137 | end |
138 | in |
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139 | TextIO.closeOut (TextIO.openOut fname); |
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140 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}) |
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141 | end |
142 | |
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143 | fun enumerateTo p sep fname = |
144 | let |
145 | val outf = TextIO.openOut fname |
146 | |
147 | val first = ref true |
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148 | val baseLen = length (String.fields (fn ch => ch = #"/") Config.resultRoot) + 1 |
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149 | |
150 | fun visitDir dname = |
151 | let |
152 | val dir = Posix.FileSys.opendir dname |
153 | |
154 | fun loop () = |
155 | case Posix.FileSys.readdir dir of |
156 | NONE => Posix.FileSys.closedir dir |
157 | | SOME fname' => |
158 | let |
159 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
160 | in |
161 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
162 | visitDir path |
163 | else if p fname' then |
164 | let |
165 | val toks = String.fields (fn ch => ch = #"/") dname |
166 | val toks = List.drop (toks, baseLen) |
167 | val dom = String.concatWith "." (rev toks) |
168 | in |
169 | if !first then |
170 | first := false |
171 | else |
172 | TextIO.output (outf, sep); |
173 | TextIO.output (outf, dom) |
174 | end |
175 | else |
176 | (); |
177 | loop () |
178 | end |
179 | in |
180 | loop () |
181 | end |
182 | in |
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183 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}); |
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184 | TextIO.closeOut outf |
185 | end |
186 | |
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187 | fun readList fname = |
188 | let |
189 | val inf = TextIO.openIn fname |
190 | |
191 | fun loop acc = |
192 | case TextIO.inputLine inf of |
193 | NONE => rev acc |
194 | | SOME line => loop (String.substring (line, 0, size line - 1) :: acc) |
195 | in |
196 | loop [] |
197 | before TextIO.closeIn inf |
198 | end |
199 | |
200 | fun writeList (fname, ls) = |
201 | let |
202 | val outf = TextIO.openOut fname |
203 | in |
204 | app (fn s => (TextIO.output (outf, s); |
205 | TextIO.output1 (outf, #"\n"))) ls; |
206 | TextIO.closeOut outf |
207 | end |
208 | |
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209 | fun lineInFile fname line = |
210 | let |
211 | val inf = TextIO.openIn fname |
212 | val line' = line ^ "\n" |
213 | |
214 | fun loop () = |
215 | case TextIO.inputLine inf of |
216 | NONE => false |
217 | | SOME line => line = line' orelse loop () |
218 | in |
219 | loop () |
220 | before TextIO.closeIn inf |
221 | end handle IO.Io _ => false |
222 | |
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223 | fun inGroup {user, group} = |
224 | List.exists (fn x => x = user) |
225 | (Posix.SysDB.Group.members (Posix.SysDB.getgrnam group)) |
226 | handle OS.SysErr _ => false |
227 | |
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228 | fun mkDirAll dir = ignore (OS.Process.system ("mkdir -p " ^ dir)) |
229 | |
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230 | fun remove (ls, x) = List.filter (fn y => y <> x) ls |
231 | fun removeDups ls = List.foldr (fn (x, ls) => |
232 | if List.exists (fn y => y = x) ls then |
233 | ls |
234 | else |
235 | x :: ls) [] ls |
236 | |
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237 | fun moveDirCreate {from, to} = |
238 | (mkDirAll to; |
239 | if Posix.FileSys.access (from, []) then |
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240 | (ignore (OS.Process.system ("rm -rf " ^ to)); |
241 | ignore (OS.Process.system ("cp -r " ^ from ^ " " ^ to)); |
242 | ignore (OS.Process.system ("rm -rf " ^ from))) |
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243 | else |
244 | ()) |
245 | |
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246 | end |