(Incomplete) support for access control in PCI (pci_set_acl).

-script argument to service for crash recovery scripts
-config argument to service for driver resource configuration
restart command in service to restart a driver after a crash (for use in
crash recovery scripts).
down and refresh now take labels instead of pids.
verious changes in rs to make this work.

lib/syslib/Makefile.in

@@ -22,6 +22,7 @@ libsys_FILES=" \
 	pci_next_dev.c \
 	pci_rescan_bus.c \
 	pci_reserve.c \
+	pci_set_acl.c \
 	pci_slot_name.c \
 	safecopies.c \
 	sys_abort.c \

lib/syslib/pci_set_acl.c

@@ -0,0 +1,56 @@
+/*
+pci_set_acl.c
+*/
+
+#include "pci.h"
+#include "syslib.h"
+#include <minix/rs.h>
+#include <minix/sysutil.h>
+
+/*===========================================================================*
+ *				pci_set_acl				     *
+ *===========================================================================*/
+PUBLIC int pci_set_acl(rs_pci)
+struct rs_pci *rs_pci;
+{
+	int r;
+	cp_grant_id_t gid;
+	message m;
+
+	if (pci_procnr == ANY)
+	{
+		r= _pm_findproc("pci", &pci_procnr);
+		if (r != 0)
+		{
+			panic("pci",
+				"pci_set_acl: _pm_findproc failed for 'pci'",
+				r);
+		}
+	}
+
+
+printf("pci_set_acl: before cpf_grant_direct\n");
+	gid= cpf_grant_direct(pci_procnr, (vir_bytes)rs_pci, sizeof(*rs_pci),
+		CPF_READ);
+printf("pci_set_acl: after cpf_grant_direct: gid %d\n", gid);
+	if (gid == -1)
+	{
+		printf("pci_set_acl: cpf_grant_direct failed: %d\n",
+			errno);
+		return EINVAL;
+	}
+
+	m.m_type= BUSC_PCI_ACL;
+	m.m1_i1= gid;
+
+printf("pci_set_acl: before sendrec to %d\n", pci_procnr);
+	r= sendrec(pci_procnr, &m);
+printf("pci_set_acl: after sendrec to %d\n", pci_procnr);
+	cpf_revoke(gid);
+printf("pci_set_acl: after cpf_revoke\n");
+	if (r != 0)
+		panic("pci", "pci_set_acl: can't talk to PCI", r);
+
+	return r;
+}
+