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implement Bundle;
include "sys.m";
sys: Sys;
include "bufio.m";
bufio: Bufio;
Iobuf: import bufio;
include "readdir.m";
readdir: Readdir;
include "draw.m";
include "sh.m";
include "fslib.m";
fslib: Fslib;
Report, Value, type2s, report, quit: import fslib;
Fschan, Fsdata, Entrychan, Entry,
Gatechan, Gatequery, Nilentry, Option,
Next, Down, Skip, Quit: import Fslib;
include "bundle.m";
# XXX if we can't open a directory, is it ever worth passing its metadata
# through anyway?
EOF: con "end of archive\n";
types(): string
{
return "vx";
}
badmod(p: string)
{
sys->fprint(sys->fildes(2), "fs: bundle: cannot load %s: %r\n", p);
raise "fail:bad module";
}
init()
{
sys = load Sys Sys->PATH;
readdir = load Readdir Readdir->PATH;
if(readdir == nil)
badmod(Readdir->PATH);
bufio = load Bufio Bufio->PATH;
if(bufio == nil)
badmod(Readdir->PATH);
bufio->fopen(nil, Sys->OREAD); # XXX no bufio->init!
fslib = load Fslib Fslib->PATH;
if(fslib == nil)
badmod(Readdir->PATH);
}
run(nil: ref Draw->Context, report: ref Report,
nil: list of Option, args: list of ref Value): ref Value
{
return ref Value.V(
bundle(
report,
bufio->fopen(sys->fildes(1), Sys->OWRITE),
(hd args).x().i
)
);
}
bundle(r: ref Report, iob: ref Iobuf, c: Fschan): chan of int
{
sync := chan of int;
spawn bundleproc(c, sync, iob, r.start("bundle"));
return sync;
}
bundleproc(c: Fschan, sync: chan of int, iob: ref Iobuf, errorc: chan of string)
{
if(sync != nil && <-sync == 0){
(<-c).t1 <-= Quit;
quit(errorc);
}
(d, reply) := <-c;
if(d.dir == nil){
report(errorc, "no root directory");
endarchive(iob, errorc);
}
if(puts(iob, dir2header(d.dir), errorc) == -1){
reply <-= Quit;
quit(errorc);
}
reply <-= Down;
bundledir(d.dir.name, d, c, iob, errorc);
endarchive(iob, errorc);
}
endarchive(iob: ref Iobuf, errorc: chan of string)
{
if(puts(iob, EOF, errorc) != -1)
iob.flush();
quit(errorc);
exit;
}
bundledir(path: string, d: Fsdata,
c: Fschan,
iob: ref Iobuf, errorc: chan of string)
{
if(d.dir.mode & Sys->DMDIR){
path[len path] = '/';
for(;;){
(ent, reply) := <-c;
if(ent.dir == nil){
reply <-= Skip;
break;
}
if(puts(iob, dir2header(ent.dir), errorc) == -1){
reply <-= Quit;
quit(errorc);
}
reply <-= Down;
bundledir(path + ent.dir.name, ent, c, iob, errorc);
}
iob.putc('\n');
}else{
buf: array of byte;
reply: chan of int;
length := big d.dir.length;
n := big 0;
for(;;){
((nil, buf), reply) = <-c;
if(buf == nil){
reply <-= Skip;
break;
}
if(write(iob, buf, len buf, errorc) != len buf){
reply <-= Quit;
quit(errorc);
}
n += big len buf;
if(n > length){ # should never happen
report(errorc, sys->sprint("%q is longer than expected (fatal)", path));
reply <-= Quit;
quit(errorc);
}
if(n == length){
reply <-= Skip;
break;
}
reply <-= Next;
}
if(n < length){
report(errorc, sys->sprint("%q is shorter than expected (%bd/%bd); adding null bytes", path, n, length));
buf = array[Sys->ATOMICIO] of {* => byte 0};
while(n < length){
nb := len buf;
if(length - n < big len buf)
nb = int (length - n);
if(write(iob, buf, nb, errorc) != nb){
(<-c).t1 <-= Quit;
quit(errorc);
}
report(errorc, sys->sprint("added %d null bytes", nb));
n += big nb;
}
}
}
}
dir2header(d: ref Sys->Dir): string
{
return sys->sprint("%q %uo %q %q %ud %bd\n", d.name, d.mode, d.uid, d.gid, d.mtime, d.length);
}
puts(iob: ref Iobuf, s: string, errorc: chan of string): int
{
{
if(iob.puts(s) == -1)
report(errorc, sys->sprint("write error: %r"));
return 0;
} exception {
"write on closed pipe" =>
return -1;
}
}
write(iob: ref Iobuf, buf: array of byte, n: int, errorc: chan of string): int
{
{
nw := iob.write(buf, n);
if(nw < n){
if(nw >= 0)
report(errorc, "short write");
else{
report(errorc, sys->sprint("write error: %r"));
}
}
return nw;
} exception {
"write on closed pipe" =>
report(errorc, "write on closed pipe");
return -1;
}
}
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