support for vm priv system.

fix NULL envp ptr.

servers/rs/Makefile

@@ -27,7 +27,7 @@ $(UTIL):	$(UTIL_OBJ)
 	$(CC) -o $@ $(LDFLAGS) $(UTIL_OBJ) $(UTIL_LIBS)
 $(SERVER):	$(OBJ)
 	$(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBS)
-	install -S 200k $@
+	install -S 32k $@
 
 # install with other servers
 install:	/bin/$(UTIL) /usr/sbin/$(SERVER)

servers/rs/manager.c

@@ -10,6 +10,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#include <sys/vm.h>
 #include <minix/dmap.h>
 #include <minix/ds.h>
 #include <minix/endpoint.h>
@@ -398,6 +399,16 @@ message *m_ptr;					/* request message pointer */
   rp->r_set_resources= 1;			/* new style, enforece
 						 * I/O resources
 						 */
+  if (sizeof(rp->r_vm) == sizeof(rs_start.rss_vm) &&
+      sizeof(rp->r_vm[0]) == sizeof(rs_start.rss_vm[0]))
+  {
+	  memcpy(rp->r_vm, rs_start.rss_vm, sizeof(rp->r_vm));
+  }
+  else
+  {
+	  printf("RS: do_start: internal inconsistency: bad size of r_vm\n");
+	  memset(rp->r_vm, '\0', sizeof(rp->r_vm));
+  }
 
   /* All information was gathered. Now try to start the system service. */
   r = start_service(rp, 0, &ep);
@@ -639,7 +650,8 @@ PUBLIC void do_exit(message *m_ptr)
 			run_script(rp);
 		      else {
 		        start_service(rp, 0, &ep); /* direct restart */
-	  		m_ptr->RS_ENDPOINT = ep;
+			if(m_ptr)
+		  		m_ptr->RS_ENDPOINT = ep;
 		      }
 	      }
               else if (rp->r_flags & RS_EXECFAILED) {
@@ -679,7 +691,8 @@ rp->r_restarts= 0;
 		  else {
 		      printf("RS: restarting %s\n", rp->r_cmd);
 		      start_service(rp, 0, &ep);	/* direct restart */
-	  	      m_ptr->RS_ENDPOINT = ep;
+		      if(m_ptr)
+		  	      m_ptr->RS_ENDPOINT = ep;
 			/* Do this even if no I/O happens with the ioctl, in
 			 * order to disambiguate requests with DEV_IOCTL_S.
 			 */
@@ -783,7 +796,9 @@ endpoint_t *endpoint;
   char *file_only;
   int s, use_copy, slot_nr;
   struct priv *privp;
+  bitchunk_t *vm_mask;
   message m;
+  char * null_env = NULL;
 
   use_copy= (rp->r_exec != NULL);
   
@@ -813,9 +828,9 @@ endpoint_t *endpoint;
       cpf_reload();			/* Tell kernel about grant table  */
       if (!use_copy)
       {
-	execve(rp->r_argv[0], rp->r_argv, NULL);	/* POSIX execute */
+	execve(rp->r_argv[0], rp->r_argv, &null_env);	/* POSIX execute */
 	file_only = strrchr(rp->r_argv[0], '/') + 1;
-	execve(file_only, rp->r_argv, NULL);		/* POSIX execute */
+	execve(file_only, rp->r_argv, &null_env);		/* POSIX execute */
       }
       printf("RS: exec failed for %s: %d\n", rp->r_argv[0], errno);
       slot_nr= rp-rproc;
@@ -843,6 +858,7 @@ endpoint_t *endpoint;
   }
 
   privp= NULL;
+  vm_mask = NULL;
   if (rp->r_set_resources)
   {
 	init_privs(rp, &rp->r_priv);
@@ -850,6 +866,8 @@ endpoint_t *endpoint;
 
 	/* Inform the PCI server about the driver */
 	init_pci(rp, child_proc_nr_e);
+
+	vm_mask = &rp->r_vm[0];
   }
 
   /* Set the privilege structure for the child process to let is run.
@@ -863,6 +881,14 @@ endpoint_t *endpoint;
       return(s);					/* return error */
   }
 
+  if ((s = vm_set_priv(child_proc_nr_e, vm_mask)) < 0) {
+	  report("RS", "vm_set_priv call failed", s);
+	  rp->r_flags |= RS_EXITING;
+	  if (child_pid > 0) kill(child_pid, SIGKILL);
+	  else report("RS", "didn't kill pid", child_pid);
+	  return (s);
+  }
+
   s= ds_publish_u32(rp->r_label, child_proc_nr_e);
   if (s != OK)
 	printf("RS: start_service: ds_publish_u32 failed: %d\n", s);
@@ -1034,6 +1060,7 @@ struct rproc *rp;
 	pid_t pid;
 	char *reason;
 	char incarnation_str[20];	/* Enough for a counter? */
+	char *envp[1] = { NULL };
 
 	if (rp->r_flags & RS_EXITING)
 		reason= "exit";
@@ -1071,7 +1098,7 @@ struct rproc *rp;
 		break;
 	case 0:
 		execle(rp->r_script, rp->r_script, rp->r_label, reason,
-			incarnation_str, NULL, NULL);
+			incarnation_str, NULL, envp);
 		printf("RS: run_script: execl '%s' failed: %s\n",
 			rp->r_script, strerror(errno));
 		exit(1);

servers/rs/manager.h

@@ -18,6 +18,7 @@
 #define MAX_IPC_LIST	    256		/* Max size of list for IPC target
 					 * process names
 					 */
+#define MAX_VM_LIST	    256
 
 /* Definition of the system process table. This table only has entries for
  * the servers and drivers, and thus is not directly indexed by slot number.
@@ -61,6 +62,8 @@ extern struct rproc {
 
   u32_t r_call_mask[MAX_NR_SYSTEM];
   char r_ipc_list[MAX_IPC_LIST];
+#define R_VM_CALL_SIZE BITMAP_CHUNKS(VM_NCALLS)
+  bitchunk_t r_vm[R_VM_CALL_SIZE];
 } rproc[NR_SYS_PROCS];
 
 /* Mapping for fast access to the system process table. */ 

servers/rs/service.c

@@ -13,6 +13,7 @@
 #include <errno.h>
 #include <pwd.h>
 #include <unistd.h>
+#include <limits.h>
 #include <minix/config.h>
 #include <minix/com.h>
 #include <minix/const.h>
@@ -21,6 +22,7 @@
 #include <minix/rs.h>
 #include <minix/syslib.h>
 #include <minix/sysinfo.h>
+#include <minix/bitmap.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <configfile.h>
@@ -332,6 +334,7 @@ PRIVATE void fatal(char *fmt, ...)
 #define KW_CLASS	"class"
 #define KW_SYSTEM	"system"
 #define KW_IPC		"ipc"
+#define KW_VM		"vm"
 
 FORWARD void do_driver(config_t *cpe, config_t *config);
 
@@ -700,6 +703,7 @@ struct
 	{ "VMCTL",		SYS_VMCTL },
 	{ "PROFBUF",		SYS_PROFBUF },
 	{ "SYSCTL",		SYS_SYSCTL },
+	{ "INT86",		SYS_INT86 },
 	{ NULL,		0 }
 };
 
@@ -752,6 +756,48 @@ PRIVATE void do_ipc(config_t *cpe)
 	req_ipc= list;
 }
 
+struct
+{
+	char *label;
+	int call_nr;
+} vm_table[] =
+{
+	{ "REMAP",		VM_REMAP },
+	{ "UNREMAP",		VM_SHM_UNMAP },
+	{ "GETPHYS",		VM_GETPHYS },
+	{ "GETREFCNT",		VM_GETREF },
+	{ "QUERYEXIT",		VM_QUERY_EXIT },
+	{ "CTL",		VM_CTL },
+	{ NULL,			0 },
+};
+
+PRIVATE void do_vm(config_t *cpe)
+{
+	int i;
+
+	for (; cpe; cpe = cpe->next)
+	{
+		if (cpe->flags & CFG_SUBLIST)
+		{
+			fatal("do_vm: unexpected sublist at %s:%d",
+			      cpe->file, cpe->line);
+		}
+		if (cpe->flags & CFG_STRING)
+		{
+			fatal("do_vm: unexpected string at %s:%d",
+			      cpe->file, cpe->line);
+		}
+
+		for (i = 0; vm_table[i].label != NULL; i++)
+			if (!strcmp(cpe->word, vm_table[i].label))
+				break;
+		if (vm_table[i].label == NULL)
+			fatal("do_vm: unknown call '%s' at %s:%d",
+				cpe->word, cpe->file, cpe->line);
+		SET_BIT(rs_start.rss_vm, vm_table[i].call_nr - VM_RQ_BASE);
+	}
+}
+
 PRIVATE void do_system(config_t *cpe)
 {
 	int i, call_nr, word, bits_per_word;
@@ -883,6 +929,11 @@ PRIVATE void do_driver(config_t *cpe, config_t *config)
 			do_ipc(cpe->next);
 			continue;
 		}
+		if (strcmp(cpe->word, KW_VM) == 0)
+		{
+			do_vm(cpe->next);
+			continue;
+		}
 
 	}
 }