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implement Chstat, Fsmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
include "alphabet/reports.m";
include "alphabet/fs.m";
fsfilter: Fsfilter;
fs: Fs;
Value: import fs;
Fschan, Fsdata, Entrychan, Entry,
Gatechan, Gatequery, Nilentry, Option,
Next, Down, Skip, Quit: import Fs;
Chstat: module {};
Query: adt {
gate: Gatechan;
stat: Sys->Dir;
mask: int;
cflag: int;
reply: chan of int;
query: fn(q: self ref Query, d: ref Sys->Dir, name: string, depth: int): int;
};
types(): string
{
return "xx-pp-ms-us-gs-ts-as-c";
}
badmod(p: string)
{
sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);
raise "fail:bad module";
}
init()
{
sys = load Sys Sys->PATH;
fs = load Fs Fs->PATH;
if(fs == nil)
badmod(Fs->PATH);
fsfilter = load Fsfilter Fsfilter->PATH;
if(fsfilter == nil)
badmod(Fsfilter->PATH);
}
run(nil: ref Draw->Context, nil: ref Reports->Report,
opts: list of Option, args: list of ref Value): ref Value
{
ws := Sys->nulldir;
mask := 0;
gate: ref Value;
cflag := 0;
for(; opts != nil; opts = tl opts){
o := (hd opts).args;
case (hd opts).opt {
'p' =>
gate.free(0);
gate = hd o;
'm' =>
ok: int;
m := (hd o).s().i;
(ok, mask, ws.mode) = parsemode(m);
mask &= ~Sys->DMDIR;
if(ok == 0){
sys->fprint(sys->fildes(2), "fs: chstat: bad mode %#q\n", m);
gate.free(0);
return nil;
}
'u' =>
ws.uid = (hd o).s().i;
'g' =>
ws.gid = (hd o).s().i;
't' =>
ws.mtime = int (hd o).s().i;
'a' =>
ws.atime = int (hd o).s().i;
'c' =>
cflag++;
}
}
dst := chan of (Fsdata, chan of int);
p: Gatechan;
if(gate != nil)
p = gate.p().i;
spawn chstatproc((hd args).x().i, dst, p, ws, mask, cflag);
return ref Value.Vx(dst);
}
chstatproc(src, dst: Fschan, gate: Gatechan, stat: Sys->Dir, mask: int, cflag: int)
{
fsfilter->filter(ref Query(gate, stat, mask, cflag, chan of int), src, dst);
if(gate != nil)
gate <-= ((nil, nil, 0), nil);
}
Query.query(q: self ref Query, d: ref Sys->Dir, name: string, depth: int): int
{
c := 1;
if(q.gate != nil){
q.gate <-= ((d, name, depth), q.reply);
c = <-q.reply;
}
if(c){
if(q.cflag){
m := d.mode & 8r700;
d.mode = (d.mode & ~8r77)|(m>>3)|(m>>6);
}
stat := q.stat;
d.mode = (d.mode & ~q.mask) | (stat.mode & q.mask);
if(stat.uid != nil)
d.uid = stat.uid;
if(stat.gid != nil)
d.gid = stat.gid;
if(stat.mtime != ~0)
d.mtime = stat.mtime;
if(stat.atime != ~0)
d.atime = stat.atime;
}
return 1;
}
# stolen from /appl/cmd/chmod.b
User: con 8r700;
Group: con 8r070;
Other: con 8r007;
All: con User | Group | Other;
Read: con 8r444;
Write: con 8r222;
Exec: con 8r111;
parsemode(spec: string): (int, int, int)
{
mask := Sys->DMAPPEND | Sys->DMEXCL | Sys->DMDIR | Sys->DMAUTH;
loop:
for(i := 0; i < len spec; i++){
case spec[i] {
'u' =>
mask |= User;
'g' =>
mask |= Group;
'o' =>
mask |= Other;
'a' =>
mask |= All;
* =>
break loop;
}
}
if(i == len spec)
return (0, 0, 0);
if(i == 0)
mask |= All;
op := spec[i++];
if(op != '+' && op != '-' && op != '=')
return (0, 0, 0);
mode := 0;
for(; i < len spec; i++){
case spec[i]{
'r' =>
mode |= Read;
'w' =>
mode |= Write;
'x' =>
mode |= Exec;
'a' =>
mode |= Sys->DMAPPEND;
'l' =>
mode |= Sys->DMEXCL;
'd' =>
mode |= Sys->DMDIR;
'A' =>
mode |= Sys->DMAUTH;
* =>
return (0, 0, 0);
}
}
if(op == '+' || op == '-')
mask &= mode;
if(op == '-')
mode = ~mode;
return (1, mask, mode);
}
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