shithub: riscv

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added /proc/*/ppid

--- a/sys/src/9/port/devproc.c

+++ b/sys/src/9/port/devproc.c

@@ -23,6 +23,7 @@

 	Qnoteid,

 	Qnotepg,

 	Qns,

+	Qppid,

 	Qproc,

 	Qregs,

 	Qsegment,

@@ -87,6 +88,7 @@

 	"noteid",	{Qnoteid},	0,			0664,

 	"notepg",	{Qnotepg},	0,			0000,

 	"ns",		{Qns},		0,			0444,

+	"ppid",		{Qppid},	0,			0444,

 	"proc",		{Qproc},	0,			0400,

 	"regs",		{Qregs},	sizeof(Ureg),		0000,

 	"segment",	{Qsegment},	0,			0444,

@@ -417,6 +419,7 @@

 	case Qregs:

 	case Qfpregs:

 	case Qsyscall:	

+	case Qppid:

 		nonone(p);

 		break;

@@ -963,6 +966,8 @@

 	case Qnoteid:

 		return readnum(offset, va, n, p->noteid, NUMSIZE);

+	case Qppid:

+		return readnum(offset, va, n, p->parentpid, NUMSIZE);

 	case Qfd:

 		return procfds(p, va, n, offset);

 	}