-(* 'top'-like tool for libvirt domains.
- (C) Copyright 2007-2009 Richard W.M. Jones, Red Hat Inc.
- http://libvirt.org/
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- This file contains utility functions.
-*)
-
-open Printf
-
-open Virt_top_gettext.Gettext
-
-module C = Libvirt.Connect
-module D = Libvirt.Domain
-module N = Libvirt.Network
-
-let (//) = Filename.concat
-
-(* Int64 operators for convenience. *)
-let (+^) = Int64.add
-let (-^) = Int64.sub
-let ( *^ ) = Int64.mul
-let (/^) = Int64.div
-
-(* failwithf is a printf-like version of failwith. *)
-let failwithf fs = ksprintf failwith fs
-
-(* Input a whole file as a list of lines. *)
-let input_all_lines chan =
- let lines = ref [] in
- (try
- while true; do
- lines := input_line chan :: !lines
- done
- with
- End_of_file -> ());
- List.rev !lines
-
-(* Trim whitespace from the beginning and end of strings. *)
-let isspace c =
- c = ' '
- (* || c = '\f' *) || c = '\n' || c = '\r' || c = '\t' (* || c = '\v' *)
-
-let triml ?(test = isspace) str =
- let i = ref 0 in
- let n = ref (String.length str) in
- while !n > 0 && test str.[!i]; do
- decr n;
- incr i
- done;
- if !i = 0 then str
- else String.sub str !i !n
-
-let trimr ?(test = isspace) str =
- let n = ref (String.length str) in
- while !n > 0 && test str.[!n-1]; do
- decr n
- done;
- if !n = String.length str then str
- else String.sub str 0 !n
-
-let trim ?(test = isspace) str =
- trimr (triml str)
-
-(* Read a configuration file as a list of (key, value) pairs.
- * If the config file is missing this returns an empty list.
- *)
-let blanks_and_comments = Str.regexp "^[ \t]*\\(#.*\\)?$"
-
-let read_config_file filename =
- let lines =
- try
- let chan = open_in filename in
- let lines = input_all_lines chan in
- close_in chan;
- lines
- with
- Sys_error _ -> [] in (* Ignore errors opening file. *)
-
- (* Line numbers. *)
- let lines =
- let i = ref 0 in List.map (fun line -> (incr i; !i), line) lines in
-
- (* Remove blank lines and comment lines. *)
- let lines =
- List.filter
- (fun (lineno, line) ->
- not (Str.string_match blanks_and_comments line 0)) lines in
-
- (* Convert to key, value pairs. *)
- List.map (
- fun (lineno, line) ->
- let key, value = ExtString.String.split line " " in
- lineno, trim key, trim value
- ) lines
-
-(* Pad a string to the full width with spaces. If too long, truncate. *)
-let pad width str =
- if width <= 0 then ""
- else (
- let n = String.length str in
- if n = width then str
- else if n > width then String.sub str 0 width
- else (* if n < width then *) str ^ String.make (width-n) ' '
- )
-
-module Show = struct
- (* Show a percentage in 4 chars. *)
- let percent percent =
- if percent <= 0. then " 0.0"
- else if percent <= 9.9 then sprintf " %1.1f" percent
- else if percent <= 99.9 then sprintf "%2.1f" percent
- else "100 "
-
- (* Show an int64 option in 4 chars. *)
- let rec int64_option = function
- | None -> " "
- | Some n -> int64 n
- (* Show an int64 in 4 chars. *)
- and int64 = function
- | n when n < 0L -> "-!!!"
- | n when n <= 9999L ->
- sprintf "%4Ld" n
- | n when n /^ 1024L <= 999L ->
- sprintf "%3LdK" (n /^ 1024L)
- | n when n /^ 1_048_576L <= 999L ->
- sprintf "%3LdM" (n /^ 1_048_576L)
- | n when n /^ 1_073_741_824L <= 999L ->
- sprintf "%3LdG" (n /^ 1_073_741_824L)
- | _ -> ">!!!"
-
- (* Format the total time (may be large!) in 9 chars. *)
- let time ns =
- let secs_in_ns = 1_000_000_000L in
- let mins_in_ns = 60_000_000_000L in
- let hours_in_ns = 3_600_000_000_000L in
-
- let hours = ns /^ hours_in_ns in
- let ns = ns -^ (hours *^ hours_in_ns) in
- let mins = ns /^ mins_in_ns in
- let ns = ns -^ (mins *^ mins_in_ns) in
- let secs = ns /^ secs_in_ns in
- let ns = ns -^ (secs *^ secs_in_ns) in
- let pennies = ns /^ 10_000_000L in
-
- if hours < 12L then
- sprintf "%3Ld:%02Ld.%02Ld" (hours *^ 60L +^ mins) secs pennies
- else if hours <= 999L then
- sprintf "%3Ld:%02Ld:%02Ld" hours mins secs
- else (
- let days = hours /^ 24L in
- let hours = hours -^ (days *^ 24L) in
- sprintf "%3Ldd%02Ld:%02Ld" days hours mins
- )
-end
-
-(* Sum Domain.block_stats structures together. Missing fields
- * get forced to 0. Empty list returns all 0.
- *)
-let zero_block_stats =
- { D.rd_req = 0L; rd_bytes = 0L; wr_req = 0L; wr_bytes = 0L; errs = 0L }
-let add_block_stats bs1 bs2 =
- let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
- { D.rd_req = add bs1.D.rd_req bs2.D.rd_req;
- rd_bytes = add bs1.D.rd_bytes bs2.D.rd_bytes;
- wr_req = add bs1.D.wr_req bs2.D.wr_req;
- wr_bytes = add bs1.D.wr_bytes bs2.D.wr_bytes;
- errs = add bs1.D.errs bs2.D.errs }
-let sum_block_stats =
- List.fold_left add_block_stats zero_block_stats
-
-(* Get the difference between two block_stats structures. Missing data
- * forces the difference to -1.
- *)
-let diff_block_stats curr prev =
- let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
- { D.rd_req = sub curr.D.rd_req prev.D.rd_req;
- rd_bytes = sub curr.D.rd_bytes prev.D.rd_bytes;
- wr_req = sub curr.D.wr_req prev.D.wr_req;
- wr_bytes = sub curr.D.wr_bytes prev.D.wr_bytes;
- errs = sub curr.D.errs prev.D.errs }
-
-(* Sum Domain.interface_stats structures together. Missing fields
- * get forced to 0. Empty list returns all 0.
- *)
-let zero_interface_stats =
- { D.rx_bytes = 0L; rx_packets = 0L; rx_errs = 0L; rx_drop = 0L;
- tx_bytes = 0L; tx_packets = 0L; tx_errs = 0L; tx_drop = 0L }
-let add_interface_stats is1 is2 =
- let add f1 f2 = if f1 >= 0L && f2 >= 0L then f1 +^ f2 else 0L in
- { D.rx_bytes = add is1.D.rx_bytes is2.D.rx_bytes;
- rx_packets = add is1.D.rx_packets is2.D.rx_packets;
- rx_errs = add is1.D.rx_errs is2.D.rx_errs;
- rx_drop = add is1.D.rx_drop is2.D.rx_drop;
- tx_bytes = add is1.D.tx_bytes is2.D.tx_bytes;
- tx_packets = add is1.D.tx_packets is2.D.tx_packets;
- tx_errs = add is1.D.tx_errs is2.D.tx_errs;
- tx_drop = add is1.D.tx_drop is2.D.tx_drop }
-let sum_interface_stats =
- List.fold_left add_interface_stats zero_interface_stats
-
-(* Get the difference between two interface_stats structures.
- * Missing data forces the difference to -1.
- *)
-let diff_interface_stats curr prev =
- let sub f1 f2 = if f1 >= 0L && f2 >= 0L then f1 -^ f2 else -1L in
- { D.rx_bytes = sub curr.D.rx_bytes prev.D.rx_bytes;
- rx_packets = sub curr.D.rx_packets prev.D.rx_packets;
- rx_errs = sub curr.D.rx_errs prev.D.rx_errs;
- rx_drop = sub curr.D.rx_drop prev.D.rx_drop;
- tx_bytes = sub curr.D.tx_bytes prev.D.tx_bytes;
- tx_packets = sub curr.D.tx_packets prev.D.tx_packets;
- tx_errs = sub curr.D.tx_errs prev.D.tx_errs;
- tx_drop = sub curr.D.tx_drop prev.D.tx_drop }
git.annexia.org / virt-top.git / blobdiff