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(* virt-sysprep
* Copyright (C) 2010-2012 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Printf
module G = Guestfs
let (//) = Filename.concat
let () = Random.self_init ()
let failwithf fs = ksprintf failwith fs
let string_prefix str prefix =
let n = String.length prefix in
String.length str >= n && String.sub str 0 n = prefix
let rec string_find s sub =
let len = String.length s in
let sublen = String.length sub in
let rec loop i =
if i <= len-sublen then (
let rec loop2 j =
if j < sublen then (
if s.[i+j] = sub.[j] then loop2 (j+1)
else -1
) else
i (* found *)
in
let r = loop2 0 in
if r = -1 then loop (i+1) else r
) else
-1 (* not found *)
in
loop 0
let rec string_split sep str =
let len = String.length str in
let seplen = String.length sep in
let i = string_find str sep in
if i = -1 then [str]
else (
let s' = String.sub str 0 i in
let s'' = String.sub str (i+seplen) (len-i-seplen) in
s' :: string_split sep s''
)
let string_random8 =
let chars = "abcdefghijklmnopqrstuvwxyz0123456789" in
fun () ->
String.concat "" (
List.map (
fun _ ->
let c = Random.int 36 in
let c = chars.[c] in
String.make 1 c
) [1;2;3;4;5;6;7;8]
)
(* Skip any leading '-' characters when comparing command line args. *)
let skip_dashes str =
let n = String.length str in
let rec loop i =
if i >= n then invalid_arg "skip_dashes"
else if String.unsafe_get str i = '-' then loop (i+1)
else i
in
let i = loop 0 in
if i = 0 then str
else String.sub str i (n-i)
let compare_command_line_args a b =
compare (String.lowercase (skip_dashes a)) (String.lowercase (skip_dashes b))
let read_whole_file path =
let buf = Buffer.create 16384 in
let chan = open_in path in
let maxlen = 16384 in
let s = String.create maxlen in
let rec loop () =
let r = input chan s 0 maxlen in
if r > 0 then (
Buffer.add_substring buf s 0 r;
loop ()
)
in
loop ();
close_in chan;
Buffer.contents buf
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