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implement Fsmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
sh: Sh;
Context: import sh;
include "fslib.m";
fslib: Fslib;
Option, Value, Entrychan, Report: import fslib;
# usage: exec [-n nfiles] [-t endcmd] [-pP] command entries
types(): string
{
return "vct-ns-tc-p-P";
}
badmod(p: string)
{
sys->fprint(sys->fildes(2), "fs: exec: cannot load %s: %r\n", p);
raise "fail:bad module";
}
init()
{
sys = load Sys Sys->PATH;
fslib = load Fslib Fslib->PATH;
if(fslib == nil)
badmod(Fslib->PATH);
sh = load Sh Sh->PATH;
if(sh == nil)
badmod(Sh->PATH);
sh->initialise();
}
run(drawctxt: ref Draw->Context, report: ref Report,
opts: list of Option, args: list of ref Value): ref Value
{
n := 1;
pflag := 0;
tcmd: ref Sh->Cmd;
for(; opts != nil; opts = tl opts){
o := hd opts;
case o.opt {
'n' =>
if((n = int (hd o.args).s().i) <= 0){
sys->fprint(sys->fildes(2), "fs: exec: invalid argument to -n\n");
return nil;
}
't' =>
tcmd = (hd o.args).c().i;
'p' =>
pflag = 1;
'P' =>
pflag = 2;
}
}
if(pflag && n > 1){
sys->fprint(sys->fildes(2), "fs: exec: cannot specify -p with -n %d\n", n);
return nil;
}
cmd := (hd args).c().i;
c := (hd tl args).t().i;
sync := chan of int;
spawn execproc(drawctxt, sync, n, pflag, c, cmd, tcmd, report.start("exec"));
sync <-= 1;
return ref Value.V(sync);
}
execproc(drawctxt: ref Draw->Context, sync: chan of int, n, pflag: int,
c: Entrychan, cmd, tcmd: ref Sh->Cmd, errorc: chan of string)
{
sys->pctl(Sys->NEWFD, 0::1::2::nil);
ctxt := Context.new(drawctxt);
<-sync;
if(<-sync == 0){
c.sync <-= 0;
errorc <-= nil;
exit;
}
c.sync <-= 1;
argv := ref Sh->Listnode(cmd, nil) :: nil;
fl: list of ref Sh->Listnode;
nf := 0;
while(((d, p, nil) := <-c.c).t0 != nil){
fl = ref Sh->Listnode(nil, p) :: fl;
if(++nf >= n){
ctxt.set("file", rev(fl));
if(pflag)
setstatenv(ctxt, d, pflag);
fl = nil;
nf = 0;
{ctxt.run(argv, 0);} exception {"fail:*" =>;}
}
}
if(nf > 0){
ctxt.set("file", rev(fl));
{ctxt.run(argv, 0);} exception {"fail:*" =>;}
}
if(tcmd != nil){
ctxt.set("file", nil);
{ctxt.run(ref Sh->Listnode(tcmd, nil) :: nil, 0);} exception {"fail:*" =>;}
}
errorc <-= nil;
}
setenv(ctxt: ref Context, var: string, val: list of string)
{
ctxt.set(var, sh->stringlist2list(val));
}
setstatenv(ctxt: ref Context, dir: ref Sys->Dir, pflag: int)
{
setenv(ctxt, "mode", modes(dir.mode) :: nil);
setenv(ctxt, "uid", dir.uid :: nil);
setenv(ctxt, "mtime", string dir.mtime :: nil);
setenv(ctxt, "length", string dir.length :: nil);
if(pflag > 1){
setenv(ctxt, "name", dir.name :: nil);
setenv(ctxt, "gid", dir.gid :: nil);
setenv(ctxt, "muid", dir.muid :: nil);
setenv(ctxt, "qid", sys->sprint("16r%ubx", dir.qid.path) :: string dir.qid.vers :: nil);
setenv(ctxt, "atime", string dir.atime :: nil);
setenv(ctxt, "dtype", sys->sprint("%c", dir.dtype) :: nil);
setenv(ctxt, "dev", string dir.dev :: nil);
}
}
mtab := array[] of {
"---", "--x", "-w-", "-wx",
"r--", "r-x", "rw-", "rwx"
};
modes(mode: int): string
{
s: string;
if(mode & Sys->DMDIR)
s = "d";
else if(mode & Sys->DMAPPEND)
s = "a";
else if(mode & Sys->DMAUTH)
s = "A";
else
s = "-";
if(mode & Sys->DMEXCL)
s += "l";
else
s += "-";
s += mtab[(mode>>6)&7]+mtab[(mode>>3)&7]+mtab[mode&7];
return s;
}
rev[T](x: list of T): list of T
{
l: list of T;
for(; x != nil; x = tl x)
l = hd x :: l;
return l;
}
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