kernel: Extend the sys_whoami() interface.

Add support for init flags.

Change-Id: Ibb4d7eb9064d2bbee6d51112ad0c56b2750a5f8e

minix/include/minix/ipc.h

@@ -289,7 +289,8 @@ _ASSERT_MSG_SIZE(mess_krn_lsys_sys_fork);
 typedef struct {
 	endpoint_t endpt;
 	int privflags;
-	char name[48];
+	int initflags;
+	char name[44];
 
 } mess_krn_lsys_sys_getwhoami;
 _ASSERT_MSG_SIZE(mess_krn_lsys_sys_getwhoami);

minix/include/minix/priv.h

@@ -49,6 +49,12 @@
 #define USR_F     (BILLABLE | PREEMPTIBLE)         /* user processes */
 #define IMM_F     (ROOT_SYS_PROC | VM_SYS_PROC | PREEMPTIBLE) /* immutable */
 
+/* init flags */
+#define TSK_I     0                               /* all kernel tasks */
+#define SRV_I     0                               /* system services */
+#define DSRV_I    0                               /* dynamic system services */
+#define USR_I     0                               /* user processes */
+
 /* allowed traps */
 #define CSK_T     (1 << RECEIVE)                   /* clock and system */
 #define TSK_T     0                                /* other kernel tasks */

minix/include/minix/syslib.h

@@ -194,7 +194,7 @@ int sys_diagctl(int ctl, char *arg1, int arg2);
 int sys_getinfo(int request, void *val_ptr, int val_len, void *val_ptr2,
 	int val_len2);
 int sys_whoami(endpoint_t *ep, char *name, int namelen, int
-	*priv_flags);
+	*priv_flags, int* init_flags);
 
 /* Signal control. */
 int sys_kill(endpoint_t proc_ep, int sig);

minix/kernel/main.c

@@ -211,6 +211,8 @@ void kmain(kinfo_t *local_cbi)
 	    else if(iskerneln(proc_nr)) {
                 /* Privilege flags. */
                 priv(rp)->s_flags = (proc_nr == IDLE ? IDL_F : TSK_F);
+                /* Init flags. */
+                priv(rp)->s_init_flags = TSK_I;
                 /* Allowed traps. */
                 priv(rp)->s_trap_mask = (proc_nr == CLOCK 
                     || proc_nr == SYSTEM  ? CSK_T : TSK_T);
@@ -221,6 +223,7 @@ void kmain(kinfo_t *local_cbi)
             else {
 	    	assert(isrootsysn(proc_nr));
                 priv(rp)->s_flags= RSYS_F;        /* privilege flags */
+                priv(rp)->s_init_flags = SRV_I;   /* init flags */
                 priv(rp)->s_trap_mask= SRV_T;     /* allowed traps */
                 ipc_to_m = SRV_M;                 /* allowed targets */
                 kcalls = SRV_KC;                  /* allowed kernel calls */

minix/kernel/priv.h

@@ -22,6 +22,7 @@ struct priv {
   proc_nr_t s_proc_nr;		/* number of associated process */
   sys_id_t s_id;		/* index of this system structure */
   short s_flags;		/* PREEMTIBLE, BILLABLE, etc. */
+  int s_init_flags;             /* initialization flags given to the process. */
 
   /* Asynchronous sends */
   vir_bytes s_asyntab;		/* addr. of table in process' address space */

minix/kernel/system/do_getinfo.c

@@ -11,6 +11,7 @@
  * Upon return of the GETWHOAMI request the following parameters are used:
  *   m_krn_lsys_sys_getwhoami.endpt	(the caller endpoint)
  *   m_krn_lsys_sys_getwhoami.privflags	(the caller priviledes)
+ *   m_krn_lsys_sys_getwhoami.initflags (the caller initflags)
  *   m_krn_lsys_sys_getwhoami.name	(the caller process name)
  *
  */
@@ -136,6 +137,7 @@ int do_getinfo(struct proc * caller, message * m_ptr)
 	strncpy(m_ptr->m_krn_lsys_sys_getwhoami.name, caller->p_name, len);
 	m_ptr->m_krn_lsys_sys_getwhoami.name[len] = '\0';
 	m_ptr->m_krn_lsys_sys_getwhoami.privflags = priv(caller)->s_flags;
+        m_ptr->m_krn_lsys_sys_getwhoami.initflags = priv(caller)->s_init_flags;
 	return OK;
     }
     case GET_MONPARAMS: {

minix/kernel/system/do_privctl.c

@@ -125,6 +125,7 @@ int do_privctl(struct proc * caller, message * m_ptr)
 
 	/* Set defaults for privilege bitmaps. */
 	priv(rp)->s_flags= DSRV_F;           /* privilege flags */
+	priv(rp)->s_init_flags= DSRV_I;      /* initialization flags */
 	priv(rp)->s_trap_mask= DSRV_T;       /* allowed traps */
 	memset(&map, 0, sizeof(map));
 	ipc_to_m = DSRV_M;                   /* allowed targets */
@@ -325,8 +326,9 @@ static int update_priv(struct proc *rp, struct priv *priv)
 
   int i;
 
-  /* Copy s_flags and signal managers. */
+  /* Copy flags and signal managers. */
   priv(rp)->s_flags = priv->s_flags;
+  priv(rp)->s_init_flags = priv->s_init_flags;
   priv(rp)->s_sig_mgr = priv->s_sig_mgr;
   priv(rp)->s_bak_sig_mgr = priv->s_bak_sig_mgr;
 

minix/lib/libsys/panic.c

@@ -27,10 +27,11 @@ void panic(const char *fmt, ...)
   endpoint_t me = NONE;
   char name[20];
   int priv_flags;
+  int init_flags;
   void (*suicide)(void);
   va_list args;
 
-  if(sys_whoami(&me, name, sizeof(name), &priv_flags) == OK && me != NONE)
+  if(sys_whoami(&me, name, sizeof(name), &priv_flags, &init_flags) == OK && me != NONE)
 	printf("%s(%d): panic: ", name, me);
   else
 	printf("(sys_whoami failed): panic: ");

minix/lib/libsys/sef.c

@@ -58,13 +58,13 @@ void sef_startup()
   int r, status;
   endpoint_t old_endpoint;
   int priv_flags;
+  int init_flags;
 
   /* Get information about self. */
   r = sys_whoami(&sef_self_endpoint, sef_self_name, SEF_SELF_NAME_MAXLEN,
-      &priv_flags);
+      &priv_flags, &init_flags);
   if ( r != OK) {
-      sef_self_endpoint = SELF;
-      strlcpy(sef_self_name, "Unknown", sizeof(sef_self_name));
+      panic("sef_startup: sys_whoami failed: %d\n", r);
   }
   sef_self_priv_flags = priv_flags;
   old_endpoint = NONE;

minix/lib/libsys/sys_getinfo.c

@@ -29,7 +29,7 @@ int len2;				/* length or process nr */
  *                                sys_whoami				     *
  *===========================================================================*/
 int sys_whoami(endpoint_t *who_ep, char *who_name, int len,
-	int *priv_flags)
+	int *priv_flags, int *init_flags)
 {
 	message m;
 	int r;
@@ -49,6 +49,7 @@ int sys_whoami(endpoint_t *who_ep, char *who_name, int len,
 	who_name[lenmin] = '\0';
 	*who_ep = m.m_krn_lsys_sys_getwhoami.endpt;
 	*priv_flags = m.m_krn_lsys_sys_getwhoami.privflags;
+	*init_flags = m.m_krn_lsys_sys_getwhoami.initflags;
 
 	return OK;
 }