| 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 |
| 25 | | Delete of bool |
| 26 | | Modify |
| 27 | |
| 28 | fun isDelete (Delete _) = true |
| 29 | | isDelete _ = false |
| 30 | |
| 31 | type file_status = {action : file_action, |
| 32 | domain : string, |
| 33 | dir : string, |
| 34 | file : string} |
| 35 | |
| 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 (); |
| 62 | app (fn recd as {action, file, ...} => |
| 63 | (!fileHandler recd; |
| 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; |
| 71 | !postHandler ()) |
| 72 | |
| 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 | |
| 85 | fun run (program, argv) = |
| 86 | let |
| 87 | val proc = Unix.execute (program, argv) |
| 88 | |
| 89 | fun loop inf = |
| 90 | case TextIO.inputLine inf of |
| 91 | NONE => () |
| 92 | | SOME line => loop inf |
| 93 | (* Programs that output will fail unless we eat their output *) |
| 94 | val () = loop (Unix.textInstreamOf proc) |
| 95 | in |
| 96 | OS.Process.isSuccess (Unix.reap proc) |
| 97 | end |
| 98 | |
| 99 | |
| 100 | fun runOutput (program, argv) = |
| 101 | let |
| 102 | val proc = Unix.execute (program, argv) |
| 103 | val inf = Unix.textInstreamOf proc |
| 104 | |
| 105 | fun loop out = |
| 106 | case TextIO.inputLine inf of |
| 107 | NONE => if (List.length out) > 0 then |
| 108 | SOME (String.concat (rev out)) |
| 109 | else |
| 110 | NONE |
| 111 | | SOME line => loop (line :: out) |
| 112 | |
| 113 | val lines = loop [] |
| 114 | in |
| 115 | case lines of |
| 116 | SOME lines => print lines |
| 117 | | NONE => (); |
| 118 | |
| 119 | (OS.Process.isSuccess (Unix.reap proc), lines) |
| 120 | end |
| 121 | |
| 122 | fun shellOutput ss = |
| 123 | let |
| 124 | val proc = Unix.execute ("/bin/bash", ["-c", String.concat ss ^ " 2>&1"]) |
| 125 | val inf = Unix.textInstreamOf proc |
| 126 | |
| 127 | fun loop out = |
| 128 | case TextIO.inputLine inf of |
| 129 | NONE => String.concat (rev out) |
| 130 | | SOME line => loop (line :: out) |
| 131 | |
| 132 | val lines = loop [] |
| 133 | in |
| 134 | print lines; |
| 135 | if OS.Process.isSuccess (Unix.reap proc) then |
| 136 | NONE |
| 137 | else |
| 138 | SOME lines |
| 139 | end |
| 140 | |
| 141 | fun hostname () = |
| 142 | let |
| 143 | val inf = TextIO.openIn "/etc/hostname" |
| 144 | in |
| 145 | case TextIO.inputLine inf of |
| 146 | NONE => (TextIO.closeIn inf; raise Fail "No line in /etc/hostname") |
| 147 | | SOME line => (TextIO.closeIn inf; String.substring (line, 0, size line - 1)) |
| 148 | end |
| 149 | |
| 150 | fun concatTo p fname = |
| 151 | let |
| 152 | fun visitDir dname = |
| 153 | let |
| 154 | val dir = Posix.FileSys.opendir dname |
| 155 | |
| 156 | fun loop () = |
| 157 | case Posix.FileSys.readdir dir of |
| 158 | NONE => Posix.FileSys.closedir dir |
| 159 | | SOME fname' => |
| 160 | let |
| 161 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
| 162 | in |
| 163 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
| 164 | visitDir path |
| 165 | else if p fname' then |
| 166 | shellF ([Config.cat, " ", path, " >>", fname], |
| 167 | fn cl => "Error concatenating: " ^ cl) |
| 168 | else |
| 169 | (); |
| 170 | loop () |
| 171 | end |
| 172 | in |
| 173 | loop () |
| 174 | end |
| 175 | in |
| 176 | TextIO.closeOut (TextIO.openOut fname); |
| 177 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}) |
| 178 | end |
| 179 | |
| 180 | fun enumerateTo p sep fname = |
| 181 | let |
| 182 | val outf = TextIO.openOut fname |
| 183 | |
| 184 | val first = ref true |
| 185 | val baseLen = length (String.fields (fn ch => ch = #"/") Config.resultRoot) + 1 |
| 186 | |
| 187 | fun visitDir dname = |
| 188 | let |
| 189 | val dir = Posix.FileSys.opendir dname |
| 190 | |
| 191 | fun loop () = |
| 192 | case Posix.FileSys.readdir dir of |
| 193 | NONE => Posix.FileSys.closedir dir |
| 194 | | SOME fname' => |
| 195 | let |
| 196 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} |
| 197 | in |
| 198 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then |
| 199 | visitDir path |
| 200 | else if p fname' then |
| 201 | let |
| 202 | val toks = String.fields (fn ch => ch = #"/") dname |
| 203 | val toks = List.drop (toks, baseLen) |
| 204 | val dom = String.concatWith "." (rev toks) |
| 205 | in |
| 206 | if !first then |
| 207 | first := false |
| 208 | else |
| 209 | TextIO.output (outf, sep); |
| 210 | TextIO.output (outf, dom) |
| 211 | end |
| 212 | else |
| 213 | (); |
| 214 | loop () |
| 215 | end |
| 216 | in |
| 217 | loop () |
| 218 | end |
| 219 | in |
| 220 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}); |
| 221 | TextIO.closeOut outf |
| 222 | end |
| 223 | |
| 224 | fun readList fname = |
| 225 | let |
| 226 | val inf = TextIO.openIn fname |
| 227 | |
| 228 | fun loop acc = |
| 229 | case TextIO.inputLine inf of |
| 230 | NONE => rev acc |
| 231 | | SOME line => loop (String.substring (line, 0, size line - 1) :: acc) |
| 232 | in |
| 233 | loop [] |
| 234 | before TextIO.closeIn inf |
| 235 | end |
| 236 | |
| 237 | fun writeList (fname, ls) = |
| 238 | let |
| 239 | val outf = TextIO.openOut fname |
| 240 | in |
| 241 | app (fn s => (TextIO.output (outf, s); |
| 242 | TextIO.output1 (outf, #"\n"))) ls; |
| 243 | TextIO.closeOut outf |
| 244 | end |
| 245 | |
| 246 | fun lineInFile fname line = |
| 247 | let |
| 248 | val inf = TextIO.openIn fname |
| 249 | val line' = line ^ "\n" |
| 250 | |
| 251 | fun loop () = |
| 252 | case TextIO.inputLine inf of |
| 253 | NONE => false |
| 254 | | SOME line => line = line' orelse loop () |
| 255 | in |
| 256 | loop () |
| 257 | before TextIO.closeIn inf |
| 258 | end handle IO.Io _ => false |
| 259 | |
| 260 | fun inGroup {user, group} = |
| 261 | List.exists (fn x => x = user) |
| 262 | (Posix.SysDB.Group.members (Posix.SysDB.getgrnam group)) |
| 263 | handle OS.SysErr _ => false |
| 264 | |
| 265 | fun mkDirAll dir = ignore (OS.Process.system ("mkdir -p " ^ dir)) |
| 266 | |
| 267 | fun remove (ls, x) = List.filter (fn y => y <> x) ls |
| 268 | fun removeDups ls = List.foldr (fn (x, ls) => |
| 269 | if List.exists (fn y => y = x) ls then |
| 270 | ls |
| 271 | else |
| 272 | x :: ls) [] ls |
| 273 | |
| 274 | fun moveDirCreate {from, to} = |
| 275 | (mkDirAll to; |
| 276 | if Posix.FileSys.access (from, []) then |
| 277 | (ignore (OS.Process.system ("rm -rf " ^ to)); |
| 278 | ignore (OS.Process.system ("cp -r " ^ from ^ " " ^ to)); |
| 279 | ignore (OS.Process.system ("rm -rf " ^ from))) |
| 280 | else |
| 281 | ()) |
| 282 | |
| 283 | end |