/usr/bin/smd-server is in syncmaildir 1.2.5-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | #! /usr/bin/env lua5.1
--
-- Released under the terms of GPLv3 or at your option any later version.
-- No warranties.
-- Copyright Enrico Tassi <gares@fettunta.org>
require 'syncmaildir'
-- export to the global namespace all symbols
for k,v in pairs(syncmaildir) do _G[k] = v end
-- ============================= MAIN =====================================
function main()
-- sanity checks
assert_exists(MDDIFF)
assert_exists(XDELTA)
-- argument parsing
local exclude = {}
local no_delete = false
local just_mddiff = false
local stop_after_diff = false
local override_db = nil
local dump_stdin_to = nil
local usage = "Usage: "..arg[0]:match('[^/]+$')..
" [-vdn] endpointname mailboxes...\n"
while #arg > 2 do
if arg[1] == '-v' or arg[1] == '--verbose' then
set_verbose(true)
table.remove(arg,1)
elseif arg[1] == '-d' or arg[1] == '--dry-run' then
set_dry_run(true)
table.remove(arg,1)
elseif arg[1] == '-n' or arg[1] == '--no-delete' then
no_delete = true
table.remove(arg,1)
elseif arg[1] == '--exclude' then
exclude[#exclude + 1] = arg[1]
exclude[#exclude + 1] = arg[2]
table.remove(arg,1)
table.remove(arg,1)
elseif arg[1] == '--get-mddiff-cmdline' then
just_mddiff = true
table.remove(arg,1)
elseif arg[1] == '--override-db' then
override_db = arg[2]
table.remove(arg,1)
table.remove(arg,1)
elseif arg[1] == '--stop-after-diff' then
stop_after_diff = true
table.remove(arg,1)
elseif arg[1] == '--dump-stdin' then
dump_stdin_to = arg[2]
table.remove(arg,1)
table.remove(arg,1)
else
break
end
end
if #arg < 2 then
io.stderr:write(usage)
os.exit(2)
end
if dump_stdin_to ~= nil then
dump_stdin_to = dump_stdin_to:gsub('^~',os.getenv('HOME'))
mkdir_p(dump_stdin_to)
local f = io.open(dump_stdin_to,'w')
local data = nil
repeat
data = io.read(4096)
if data then f:write(data) end
until data == nil
f:close()
os.exit(0)
end
local endpoint = arg[1]
table.remove(arg,1)
local dbfile = nil
if override_db ~= nil then
dbfile = override_db:gsub('^~',os.getenv('HOME'))
else
dbfile = dbfile_name(endpoint, arg)
end
local xdelta = dbfile .. '.xdelta'
local dbfilemt = dbfile .. '.mtime'
local newdb = dbfile .. '.new'
local newdbmt = dbfilemt .. '.new'
local database_opt = '--db-file '.. dbfile
local mailbox_opt = table.concat(arg,' ')
local no_delete_opt = ''
if no_delete then no_delete_opt = '-n' end
local dry_opt = ''
if dry_run() then dry_opt = '-d' end
local exclude_opt = table.concat(exclude, ' ')
local mddiff = MDDIFF..' '..dry_opt..' '..database_opt..' '..
exclude_opt..' '..no_delete_opt..' '..mailbox_opt
-- to call mddiff from another tool with the same cmdline
if just_mddiff then
print(mddiff)
os.exit(0)
end
-- we check the protocol version and dbfile fingerprint
handshake(dbfile)
-- run mddiff and send the output to the client
local r = io.popen(mddiff,"r")
local sent = 0
while true do
local l = r:read("*l")
if l ~= nil then
sent = sent + 1
io.write(l,'\n')
else
break
end
end
r:close()
-- end of the first phase, now the client should
-- apply the diff eventually asking for the transmission
-- of some data
io.write('END\n')
io.flush()
-- if renaming mode, we exit
if stop_after_diff then
if override_db ~= nil then
os.remove(dbfile)
os.remove(dbfilemt)
os.remove(newdb)
os.remove(newdbmt)
end
os.exit(0)
end
-- process client commands
while true do
local l = io.read('*l')
if l == nil then
-- end of input stream, client is dead
log_error('Communication with client died unexpectedly\n')
os.exit(3)
end
if l:match('^COMMIT$') then
-- the client applied the diff, the new mailbox
-- fingerprint should be used for the next sync
local rc
if not dry_run() then
rc = os.execute(
XDELTA..' delta '..dbfile..' '..newdb..' '..xdelta)
else
local f = io.open(xdelta,'w')
f:close()
rc = 0 -- there is no newdb if --dry-run is given
end
if rc ~= 0 and rc ~= 256 then
log_error('Failed running `xdelta delta` on db file: '..rc)
os.exit(4)
end
transmit(io.stdout, xdelta, "all")
os.remove(xdelta)
elseif l:match('^DONE$') then
if not dry_run() then os.rename(newdb, dbfile) end
if not dry_run() then os.rename(newdbmt, dbfilemt) end
os.exit(0)
elseif l:match('^ABORT$') then
-- the client failed in applying the diff
log_error('Client aborted, removing '..
newdb..' and '..newdbmt..'\n')
if not dry_run() then os.remove(newdb) end
if not dry_run() then os.remove(newdbmt) end
os.exit(5)
elseif l:match('^GET ') then
local path = parse(l, '^GET (%S.*)$')
transmit(io.stdout, path, "all")
elseif l:match('^GETHEADER ') then
local path = parse(l, '^GETHEADER (%S.*)$')
transmit(io.stdout, path, "header")
elseif l:match('^GETBODY ') then
local path = parse(l, '^GETBODY (%S.*)$')
transmit(io.stdout, path, "body")
else
-- protocol error
log_error('Invalid command '..l..'\n')
os.exit(6)
end
end
end
-- no more globals
set_strict()
-- parachute for error
parachute(main, 7)
-- vim:set ts=4:
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