kernel: move pgrpid to devself

sys/src/kern/port/devcons.c

@@ -676,7 +676,6 @@ enum{
 	Qhostowner,
 	Qnull,
 	Qosversion,
-	Qpgrpid,
 	Qrandom,
 	Qreboot,
 	Qswap,
@@ -707,7 +706,6 @@ static Dirtab consdir[]={
 	"kprint",	{Qkprint, 0, QTEXCL},	0,	DMEXCL|0440,
 	"null",		{Qnull},	0,		0666,
 	"osversion",	{Qosversion},	0,		0444,
-	"pgrpid",	{Qpgrpid},	NUMSIZE,	0444,
 	"random",	{Qrandom},	0,		0444,
 	"reboot",	{Qreboot},	0,		0664,
 	"swap",		{Qswap},	0,		0664,
@@ -934,9 +932,6 @@ consread(Chan *c, void *buf, long n, int64_t off)
 	case Qkprint:
 		return qread(kprintoq, buf, n);
 
-	case Qpgrpid:
-		return readnum(offset, buf, n, up->pgrp->pgrpid, NUMSIZE);
-
 	case Qtime:
 		return readtime(offset, buf, n);
 

sys/src/kern/port/devself.c

@@ -35,6 +35,7 @@ typedef enum SelfNodes
 	/* Process control */
 	Qpid,
 	Qppid,
+	Qpgrpid,
 	Qsegments,
 	Qpipes,
 	Qwdir,
@@ -64,6 +65,7 @@ static Dirtab selfdir[]={
 	".",		{Qdir, 0, QTDIR},	0,		DMDIR|0777,
 	"pid",		{Qpid},			0,		0,
 	"ppid",		{Qppid},		0,		0,
+	"pgrpid",	{Qpgrpid},		0,		0,
 	"segments",	{Qsegments},		0,		0644,
 	"pipes",	{Qpipes},		0,		0,
 	"wdir",		{Qwdir},		0,		0644,
@@ -453,6 +455,9 @@ selfremove(Chan* c)
 	case Qppid:
 		errorl("got parent pid", up->parentpid);
 		break;
+	case Qpgrpid:
+		errorl("got process group number", up->pgrp->pgrpid);
+		break;
 	case Qpipes:
 		pipeset = newpipe();
 		errorl("got new pipes", pipeset);