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kern: devproc: add ppid; enable rm -e noteid

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This commit is contained in:
Giacomo Tesio 2017-11-07 00:39:29 +01:00
parent 26bd1d8dc4
commit 7ae04d282f
1 changed files with 38 additions and 1 deletions
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39
sys/src/kern/port/devproc.c
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@ -46,6 +46,7 @@ enum
Qnotepg,
Qns,
Qproc,
Qppid,
Qregs,
Qsegment,
Qstatus,
@ -103,6 +104,7 @@ Dirtab procdir[] =
"notepg", {Qnotepg}, 0, 0000,
"ns", {Qns}, 0, 0640,
"proc", {Qproc}, 0, 0400,
"ppid", {Qppid}, 0, 0400,
"regs", {Qregs}, sizeof(Ureg), 0000,
"segment", {Qsegment}, 0, 0444,
"status", {Qstatus}, STATSIZE, 0444,
@ -384,6 +386,7 @@ procopen(Chan *c, unsigned long omode)
return tc;
case Qproc:
case Qppid:
case Qkregs:
case Qprofile:
case Qfd:
@ -1102,6 +1105,10 @@ procread(Chan *c, void *va, long n, int64_t off)
r = readnum(offset, va, n, p->noteid, NUMSIZE);
psdecref(p);
return r;
case Qppid:
r = readnum(offset, va, n, p->parentpid, NUMSIZE);
psdecref(p);
return r;
case Qfd:
r = procfds(p, va, n, offset);
psdecref(p);
@ -1302,6 +1309,36 @@ procwrite(Chan *c, void *va, long n, int64_t off)
return n;
}
static void
procremove(Chan* c)
{
Proc *p;
int pid;
if((p = psincref(SLOT(c->qid))) == nil)
error(Eprocdied);
qlock(&p->debug);
if(waserror()){
qunlock(&p->debug);
psdecref(p);
nexterror();
}
pid = PID(c->qid);
if(p->pid != pid)
error(Eprocdied);
switch(QID(c->qid)){
case Qppid:
errorl(nil, p->parentpid);
break;
case Qnoteid:
errorl(nil, p->noteid);
break;
default:
error(Eperm);
}
}
Dev procdevtab = {
'p',
"proc",
@ -1319,7 +1356,7 @@ Dev procdevtab = {
devbread,
procwrite,
devbwrite,
devremove,
procremove,
procwstat,
};