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implement Wdiff;
include "sys.m";
sys: Sys;
include "draw.m";
include "bufio.m";
bufio: Bufio;
Iobuf: import bufio;
include "arg.m";
arg: Arg;
include "wrap.m";
wrap : Wrap;
include "sh.m";
include "keyring.m";
keyring : Keyring;
Wdiff: module{
init: fn(nil: ref Draw->Context, nil: list of string);
};
root := "/";
bflag : int;
listing : int;
package: int;
diff(w : ref Wrap->Wrapped, name : string, c : chan of int)
{
sys->pctl(Sys->FORKFD, nil);
wrapped := w.root+"/"+name;
local := root+"/"+name;
(ok, dir) := sys->stat(local);
if (ok < 0) {
sys->print("cannot stat %s\n", local);
c <-= -1;
return;
}
(ok, dir) = sys->stat(wrapped);
if (ok < 0) {
sys->print("cannot stat %s\n", wrapped);
c <-= -1;
return;
}
cmd := "/dis/diff.dis";
m := load Command cmd;
if(m == nil) {
c <-= -1;
return;
}
if (bflag)
m->init(nil, cmd :: "-b" :: wrapped :: local :: nil);
else
m->init(nil, cmd :: wrapped :: local :: nil);
c <-= 0;
}
fatal(err : string)
{
sys->fprint(sys->fildes(2), "%s\n", err);
exit;
}
init(nil: ref Draw->Context, args: list of string)
{
sys = load Sys Sys->PATH;
bufio = load Bufio Bufio->PATH;
arg = load Arg Arg->PATH;
keyring = load Keyring Keyring->PATH;
wrap = load Wrap Wrap->PATH;
wrap->init(bufio);
arg->init(args);
while ((c := arg->opt()) != 0) {
case c {
'b' =>
bflag = 1;
'l' =>
listing = 1;
'p' =>
package = 1;
'r' =>
root = arg->arg();
if (root == nil)
fatal("missing root name");
* =>
fatal(sys->sprint("bad argument -%c", c));
}
}
args = arg->argv();
if (args == nil || tl args != nil)
fatal("usage: install/wdiff [-blp] [-r root] package");
(ok, dir) := sys->stat(hd args);
if (ok < 0)
fatal(sys->sprint("no such file %s", hd args));
w := wrap->openwraphdr(hd args, root, nil, !listing);
if (w == nil)
fatal("no such package found");
if(package){
while(w.nu > 0 && w.u[w.nu-1].typ == wrap->UPD)
w.nu--;
}
digest := array[keyring->MD5dlen] of { * => byte 0 };
digest0 := array[keyring->MD5dlen] of { * => byte 0 };
# loop through each md5sum file of each package in increasing time order
for(i := 0; i < w.nu; i++){
b := bufio->open(w.u[i].dir+"/md5sum", Sys->OREAD);
if (b == nil)
fatal("md5sum file not found");
while ((p := b.gets('\n')) != nil) {
(n, lst) := sys->tokenize(p, " \t\n");
if (n != 2)
fatal("error in md5sum file");
p = hd lst;
q := root+"/"+p;
(ok, dir) = sys->stat(q);
if (ok >= 0 && (dir.mode & Sys->DMDIR))
continue;
t: int;
(ok, t) = wrap->getfileinfo(w, p, nil, digest0, nil);
if(ok < 0){
sys->print("cannot happen\n");
continue;
}
if(t != w.u[i].time) # covered by later update
continue;
if (wrap->md5file(q, digest) < 0) {
sys->print("%s removed\n", p);
continue;
}
str := wrap->md5conv(digest);
str0 := wrap->md5conv(digest0);
# if (str == hd tl lst)
if(str == str0)
continue;
if (listing)
sys->print("%s modified\n", p);
else {
endc := chan of int;
spawn diff(w, p, endc);
<- endc;
}
}
}
wrap->end();
}
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