C++ set_errno函数代码示例

int inet_pton(int af, FAR const char *src, FAR void *dst)
{
#ifndef CONFIG_NET_IPv6
  size_t srcoffset;
  size_t numoffset;
  int value;
  int ndots;
  uint8_t ch;
  char numstr[4];
  uint8_t *ip;

  DEBUGASSERT(src && dst);

  if (af != AF_INET)
    {
      set_errno(EAFNOSUPPORT);
      return -1;
    }

  (void)memset(dst, 0, sizeof(struct in_addr));

  ip        = (uint8_t *)dst;
  srcoffset = 0;
  numoffset = 0;
  ndots     = 0;

  for(;;)
    {
      ch = (uint8_t)src[srcoffset++];

      if (ch == '.' || ch == '\0')
        {
          if (ch == '.' && ndots >= 4)
            {
              /* Too many dots */

              break;
            }

          if (numoffset <= 0)
            {
              /* Empty numeric string */

              break;
            }

          numstr[numoffset] = '\0';
          numoffset = 0;

          value = atoi(numstr);
          if (value < 0 || value > 255)
            {
              /* Out of range value */

              break;
            }

          ip[ndots] = (uint8_t)value;

          if (ch == '\0')
            {
              if (ndots != 3)
                {
                  /* Not enough dots */

                  break;
                }

              /* Return 1 if the conversion succeeds */

              return 1;
            }

          ndots++;
        }
      else if (ch >= '0' && ch <= '9')
        {
          numstr[numoffset++] = ch;
          if (numoffset >= 4)
            {
              /* Number is too long */

              break;
            }
        }
      else
        {
          /* Illegal character */

          break;
        }
    }

  /* Return zero if there is any problem parsing the input */

  return 0;
#else
  size_t srcoffset;
  size_t numoffset;
  long value;
//.........这里部分代码省略.........

TEST_END

TEST_BEGIN(test_malloc_strtoumax)
{
	struct test_s {
		const char *input;
		const char *expected_remainder;
		int base;
		int expected_errno;
		const char *expected_errno_name;
		uintmax_t expected_x;
	};
#define	ERR(e)	e, #e
#define	UMAX(x)	((uintmax_t)x##ULL)
	struct test_s tests[] = {
		{"0",		"0",	-1,	ERR(EINVAL),	UINTMAX_MAX},
		{"0",		"0",	1,	ERR(EINVAL),	UINTMAX_MAX},
		{"0",		"0",	37,	ERR(EINVAL),	UINTMAX_MAX},

		{"",		"",	0,	ERR(EINVAL),	UINTMAX_MAX},
		{"+",		"+",	0,	ERR(EINVAL),	UINTMAX_MAX},
		{"++3",		"++3",	0,	ERR(EINVAL),	UINTMAX_MAX},
		{"-",		"-",	0,	ERR(EINVAL),	UINTMAX_MAX},

		{"42",		"",	0,	ERR(0),		UMAX(42)},
		{"+42",		"",	0,	ERR(0),		UMAX(42)},
		{"-42",		"",	0,	ERR(0),		UMAX(-42)},
		{"042",		"",	0,	ERR(0),		UMAX(042)},
		{"+042",	"",	0,	ERR(0),		UMAX(042)},
		{"-042",	"",	0,	ERR(0),		UMAX(-042)},
		{"0x42",	"",	0,	ERR(0),		UMAX(0x42)},
		{"+0x42",	"",	0,	ERR(0),		UMAX(0x42)},
		{"-0x42",	"",	0,	ERR(0),		UMAX(-0x42)},

		{"0",		"",	0,	ERR(0),		UMAX(0)},
		{"1",		"",	0,	ERR(0),		UMAX(1)},

		{"42",		"",	0,	ERR(0),		UMAX(42)},
		{" 42",		"",	0,	ERR(0),		UMAX(42)},
		{"42 ",		" ",	0,	ERR(0),		UMAX(42)},
		{"0x",		"x",	0,	ERR(0),		UMAX(0)},
		{"42x",		"x",	0,	ERR(0),		UMAX(42)},

		{"07",		"",	0,	ERR(0),		UMAX(7)},
		{"010",		"",	0,	ERR(0),		UMAX(8)},
		{"08",		"8",	0,	ERR(0),		UMAX(0)},
		{"0_",		"_",	0,	ERR(0),		UMAX(0)},

		{"0x",		"x",	0,	ERR(0),		UMAX(0)},
		{"0X",		"X",	0,	ERR(0),		UMAX(0)},
		{"0xg",		"xg",	0,	ERR(0),		UMAX(0)},
		{"0XA",		"",	0,	ERR(0),		UMAX(10)},

		{"010",		"",	10,	ERR(0),		UMAX(10)},
		{"0x3",		"x3",	10,	ERR(0),		UMAX(0)},

		{"12",		"2",	2,	ERR(0),		UMAX(1)},
		{"78",		"8",	8,	ERR(0),		UMAX(7)},
		{"9a",		"a",	10,	ERR(0),		UMAX(9)},
		{"9A",		"A",	10,	ERR(0),		UMAX(9)},
		{"fg",		"g",	16,	ERR(0),		UMAX(15)},
		{"FG",		"G",	16,	ERR(0),		UMAX(15)},
		{"0xfg",	"g",	16,	ERR(0),		UMAX(15)},
		{"0XFG",	"G",	16,	ERR(0),		UMAX(15)},
		{"z_",		"_",	36,	ERR(0),		UMAX(35)},
		{"Z_",		"_",	36,	ERR(0),		UMAX(35)}
	};
#undef ERR
#undef UMAX
	unsigned i;

	for (i = 0; i < sizeof(tests)/sizeof(struct test_s); i++) {
		struct test_s *test = &tests[i];
		int err;
		uintmax_t result;
		char *remainder;

		set_errno(0);
		result = malloc_strtoumax(test->input, &remainder, test->base);
		err = get_errno();
		assert_d_eq(err, test->expected_errno,
		    "Expected errno %s for \"%s\", base %d",
		    test->expected_errno_name, test->input, test->base);
		assert_str_eq(remainder, test->expected_remainder,
		    "Unexpected remainder for \"%s\", base %d",
		    test->input, test->base);
		if (err == 0) {
			assert_ju_eq(result, test->expected_x,
			    "Unexpected result for \"%s\", base %d",
			    test->input, test->base);
		}
	}
}

int nxtk_drawlinewindow(NXTKWINDOW hfwnd, FAR struct nxgl_vector_s *vector,
                        nxgl_coord_t width, nxgl_mxpixel_t color[CONFIG_NX_NPLANES],
                        uint8_t caps)
{
  struct nxgl_trapezoid_s trap[3];
  struct nxgl_rect_s rect;
  int ret;

#ifdef CONFIG_DEBUG
  if (!hfwnd || !vector || width < 1 || !color)
    {
      set_errno(EINVAL);
      return ERROR;
    }
#endif

  /* Split the line into trapezoids */

  ret = nxgl_splitline(vector, trap, &rect, width);
  switch (ret)
    {
      /* 0: Line successfully broken up into three trapezoids.  Values in
       *    traps[0], traps[1], and traps[2] are valid.
       */

      case 0:
        ret = nxtk_filltrapwindow(hfwnd, &trap[0], color);
        if (ret == OK)
          {
            ret = nxtk_filltrapwindow(hfwnd, &trap[1], color);
            if (ret == OK)
              {
                ret = nxtk_filltrapwindow(hfwnd, &trap[2], color);
              }
          }
        break;

      /* 1: Line successfully represented by one trapezoid. Value in traps[1]
       *    is valid.
       */

      case 1:
        ret = nxtk_filltrapwindow(hfwnd, &trap[1], color);
         break;

      /* 2: Line successfully represented by one rectangle. Value in rect is
       *    valid
       */

       case 2:
         ret = nxtk_fillwindow(hfwnd, &rect, color);
         break;

      /* <0: On errors, a negated errno value is returned. */

      default:
         set_errno(EINVAL);
         return ERROR;
    }

  /* Draw circular caps at each end of the line to support better line joins */

  if (caps != NX_LINECAP_NONE && width >= 3)
    {
      nxgl_coord_t radius = width >> 1;

      /* Draw a circle at pt1 */

      ret = OK;
      if ((caps & NX_LINECAP_PT1) != 0)
        {
          ret = nxtk_fillcirclewindow(hfwnd, &vector->pt1, radius, color);
        }

      /* Draw a circle at pt2 */

      if (ret == OK && (caps & NX_LINECAP_PT2) != 0)
        {
          ret = nxtk_fillcirclewindow(hfwnd, &vector->pt2, radius, color);
        }
    }

RTP_BOOL SH7264_SMSC_open(PIFACE pi)   
{
    DWORD mac[2], dwCnt, dwReg, dw; 
    PSH7264_SMSC_SOFTC sc = iface_to_softc(pi);

    if (!sc)
    {
        RTP_DEBUG_ERROR("SH7264_SMSC_open: softc invalid!\r\n", NOVAR, 0, 0);
        set_errno(ENUMDEVICE);
        return(RTP_FALSE);
    }

    // Set Interface
    sc->iface = pi;
    iface = pi;

    //Setting port
    PJCR0 |= 0x3300;
    
    if (WORD_SWAP != 0xFFFFFFFF)    //Need at least one read from LAN chip before writing to WORD_SWAP register
    {
        WORD_SWAP = 0xFFFFFFFF;
    }
    
    ETHERNET_DELAY(10000);

    // soft reset
    HW_CFG = HWCFG_SRST;
    
    dwCnt = 100000;
    do
    {
        ETHERNET_DELAY(10);
        dwReg = HW_CFG;
        dwCnt--;
    }while ((dwCnt > 0) && (dwReg & HWCFG_SRST));
    
    if (dwReg & HWCFG_SRST)
    {
        debug_printf("SH7264_SMSC_open: Error in Soft reset.\r\n");
        return;
    }

    ETHERNET_DELAY(10000);
    
    //Read Mac address from EEPROM          
    mac[0]  = BIT_EDIANDW(SMSC9218_Read_Mac_Reg(ADDRL));
    mac[1]  = BIT_EDIANDW(SMSC9218_Read_Mac_Reg(ADDRH));
    
    int macLen = __min(g_NetworkConfig.NetworkInterfaces[NETWORK_INTERFACE_INDEX_SH7264RSK].macAddressLen, sizeof(sc->mac_address));
    
    dw = (DWORD)&g_NetworkConfig.NetworkInterfaces[NETWORK_INTERFACE_INDEX_SH7264RSK].macAddressBuffer[0];
    if (((dw >= 0x00000000) && (dw <= 0x03000000)) || ((dw >= 0x20000000) && (dw <= 0x23000000)))
    {
        g_AM29DL_16_BS_DeviceTable.InitializeDevice(pBLOCK_CONFIG);
        g_AM29DL_16_BS_DeviceTable.Write(pBLOCK_CONFIG,(DWORD)&g_NetworkConfig.NetworkInterfaces[NETWORK_INTERFACE_INDEX_SH7264RSK].macAddressBuffer[0],6,(BYTE *)mac,TRUE);
    }
    else
    {
        memcpy((void *)&g_NetworkConfig.NetworkInterfaces[NETWORK_INTERFACE_INDEX_SH7264RSK].macAddressBuffer[0], (void *)&mac[0], 6);
    }
    if(macLen > 0)
    {
        memcpy(&sc->mac_address[0], &g_NetworkConfig.NetworkInterfaces[NETWORK_INTERFACE_INDEX_SH7264RSK].macAddressBuffer[0], macLen);
    }
    else
    {
        RTP_DEBUG_ERROR("Device initialize without MAC address!!!\r\n", NOVAR, 0, 0);
    }
        
    // Now put in a dummy ethernet address
    rtp_memcpy(&pi->addr.my_hw_addr[0], sc->mac_address, 6); // Get the ethernet address
    
    // clear statistic information
    sc->stats.packets_in     = 0L;
    sc->stats.packets_out    = 0L;
    sc->stats.bytes_in       = 0L;
    sc->stats.bytes_out      = 0L;
    sc->stats.errors_in      = 0L;
    sc->stats.errors_out     = 0L;    

    if(RTP_FALSE == SH7264_SMSC_SetupDevice())
    {
        return RTP_FALSE;
    }
    
    rtp_irq_hook_interrupt( (RTP_PFVOID) pi, 
                            (RTP_IRQ_FN_POINTER)SH7264_SMSC_recv, 
                            (RTP_IRQ_FN_POINTER) 0);

    return(RTP_TRUE);
}

int
klpd_unreg(int did, idtype_t type, id_t id)
{
	door_handle_t dh;
	int res = 0;
	proc_t *p;
	pid_t pid;
	projid_t proj;
	kproject_t *kpp = NULL;
	credklpd_t *ckp;

	switch (type) {
	case P_PID:
		pid = (pid_t)id;
		break;
	case P_PROJID:
		proj = (projid_t)id;
		kpp = project_hold_by_id(proj, crgetzone(CRED()),
		    PROJECT_HOLD_FIND);
		if (kpp == NULL)
			return (set_errno(ESRCH));
		break;
	default:
		return (set_errno(ENOTSUP));
	}

	dh = door_ki_lookup(did);
	if (dh == NULL) {
		if (kpp != NULL)
			project_rele(kpp);
		return (set_errno(EINVAL));
	}

	if (kpp != NULL) {
		mutex_enter(&klpd_mutex);
		if (kpp->kpj_klpd == NULL)
			res = ESRCH;
		else
			klpd_freelist(&kpp->kpj_klpd);
		mutex_exit(&klpd_mutex);
		project_rele(kpp);
		goto out;
	} else if ((int)pid > 0) {
		mutex_enter(&pidlock);
		p = prfind(pid);
		if (p == NULL) {
			mutex_exit(&pidlock);
			door_ki_rele(dh);
			return (set_errno(ESRCH));
		}
		mutex_enter(&p->p_crlock);
		mutex_exit(&pidlock);
	} else if (pid == 0) {
		p = curproc;
		mutex_enter(&p->p_crlock);
	} else {
		res = klpd_unreg_dh(dh);
		goto out;
	}

	ckp = crgetcrklpd(p->p_cred);
	if (ckp != NULL) {
		crklpd_setreg(ckp, NULL);
	} else {
		res = ESRCH;
	}
	mutex_exit(&p->p_crlock);

out:
	door_ki_rele(dh);

	if (res != 0)
		return (set_errno(res));
	return (0);
}

ssize_t sendfile(int outfd, int infd, off_t *offset, size_t count)
{
	FAR uint8_t *iobuffer;
	FAR uint8_t *wrbuffer;
	off_t startpos = 0;
	ssize_t nbytesread;
	ssize_t nbyteswritten;
	ssize_t ntransferred;
	bool endxfr;

	/* Get the current file position. */

	if (offset) {
		/* Use lseek to get the current file position */

		startpos = lseek(infd, 0, SEEK_CUR);
		if (startpos == (off_t)-1) {
			return ERROR;
		}

		/* Use lseek again to set the new file position */

		if (lseek(infd, *offset, SEEK_SET) == (off_t)-1) {
			return ERROR;
		}
	}

	/* Allocate an I/O buffer */

	iobuffer = (FAR void *)lib_malloc(CONFIG_LIB_SENDFILE_BUFSIZE);
	if (!iobuffer) {
		set_errno(ENOMEM);
		return ERROR;
	}

	/* Now transfer 'count' bytes from the infd to the outfd */

	for (ntransferred = 0, endxfr = false; ntransferred < count && !endxfr;) {
		/* Loop until the read side of the transfer comes to some conclusion */

		do {
			/* Read a buffer of data from the infd */

			nbytesread = read(infd, iobuffer, CONFIG_LIB_SENDFILE_BUFSIZE);

			/* Check for end of file */

			if (nbytesread == 0) {
				/* End of file.  Break out and return current number of bytes
				 * transferred.
				 */

				endxfr = true;
				break;
			}

			/* Check for a read ERROR.  EINTR is a special case.  This function
			 * should break out and return an error if EINTR is returned and
			 * no data has been transferred.  But what should it do if some
			 * data has been transferred?  I suppose just continue?
			 */

			else if (nbytesread < 0) {
				/* EINTR is not an error (but will still stop the copy) */

#ifndef CONFIG_DISABLE_SIGNALS
				if (errno != EINTR || ntransferred == 0)
#endif
				{
					/* Read error.  Break out and return the error condition. */

					ntransferred = ERROR;
					endxfr = true;
					break;
				}
			}
		} while (nbytesread < 0);

		/* Was anything read? */

		if (!endxfr) {
			/* Yes.. Loop until the read side of the transfer comes to some
			 * conclusion.
			 */

			wrbuffer = iobuffer;
			do {
				/* Write the buffer of data to the outfd */

				nbyteswritten = write(outfd, wrbuffer, nbytesread);

				/* Check for a complete (or parial) write.  write() should not
				 * return zero.
				 */

				if (nbyteswritten >= 0) {
					/* Advance the buffer pointer and decrement the number of bytes
					 * remaining in the iobuffer.  Typically, nbytesread will now
					 * be zero.
					 */
//.........这里部分代码省略.........

int shmctl(int shmid, int cmd, struct shmid_ds *buf)
{
  FAR struct shm_region_s *region;
  int ret;

  DEBUGASSERT(shmid >= 0 && shmid < CONFIG_ARCH_SHM_MAXREGIONS);
  region =  &g_shminfo.si_region[shmid];
  DEBUGASSERT((region->sr_flags & SRFLAG_INUSE) != 0);

  /* Get exclusive access to the region data structure */

  ret = sem_wait(&region->sr_sem);
  if (ret < 0)
    {
      shmerr("ERROR: sem_wait failed: %d\n", ret);
      return ret;
    }

  /* Handle the request according to the received cmd */

  switch (cmd)
    {
      case IPC_STAT:
        {
          /* Place the current value of each member of the shmid_ds data
           * structure associated with shmid into the structure pointed to
           * by buf.
           */

          DEBUGASSERT(buf);
          memcpy(buf, &region->sr_ds, sizeof(struct shmid_ds));
        }
        break;

      case IPC_SET:
        {
          /* Set the value of the shm_perm.mode member of the shmid_ds
           * data structure associated with shmid to the corresponding
           * value found in the structure pointed to by buf.
           */

          region->sr_ds.shm_perm.mode = buf->shm_perm.mode;
        }
        break;

      case IPC_RMID:
        {
          /* Are any processes attached to the region? */

          if (region->sr_ds.shm_nattch > 0)
            {
              /* Yes.. just set the UNLINKED flag.  The region will be removed when there are no longer any processes attached to it.
               */

               region->sr_flags |= SRFLAG_UNLINKED;
            }
          else
            {
              /* No.. free the entry now */

              shm_destroy(shmid);

              /* Don't try anything further on the deleted region */

              return OK;
            }
        }
        break;

      default:
        shmerr("ERROR: Unrecognized command: %d\n", cmd);
        ret = -EINVAL;
        goto errout_with_semaphore;
    }

  /* Save the process ID of the the last operation */

  region = &g_shminfo.si_region[shmid];
  region->sr_ds.shm_lpid = getpid();

  /* Save the time of the last shmctl() */

  region->sr_ds.shm_ctime = time(NULL);

  /* Release our lock on the entry */

  sem_post(&region->sr_sem);
  return ret;

errout_with_semaphore:
  sem_post(&region->sr_sem);
  set_errno(-ret);
  return ERROR;
}

//.........这里部分代码省略.........
         * successful execution of one  of  the  exec  functions.
         */

        err = ENOSYS;
        break;

      case F_GETFL:
        /* Get the file status flags and file access modes, defined in <fcntl.h>,
         * for the file description associated with fildes. The file access modes
         * can be extracted from the return value using the mask O_ACCMODE, which is
         * defined  in <fcntl.h>. File status flags and file access modes are associated
         * with the file description and do not affect other file descriptors that
         * refer to the same file with different open file descriptions.
         */

        {
          ret = this_file->f_oflags;
        }
        break;

      case F_SETFL:
        /* Set the file status flags, defined in <fcntl.h>, for the file description
         * associated with fildes from the corresponding  bits in the third argument,
         * arg, taken as type int. Bits corresponding to the file access mode and
         * the file creation flags, as defined in <fcntl.h>, that are set in arg shall
         * be ignored. If any bits in arg other than those mentioned here are changed
         * by the application, the result is unspecified.
         */

        {
          int oflags = va_arg(ap, int);

          oflags              &=  FFCNTL;
          this_file->f_oflags &= ~FFCNTL;
          this_file->f_oflags |=  oflags;
        }
        break;

      case F_GETOWN:
        /* If fildes refers to a socket, get the process or process group ID specified
         * to receive SIGURG signals when out-of-band data is available. Positive values
         * indicate a process ID; negative values, other than -1, indicate a process group
         * ID. If fildes does not refer to a socket, the results are unspecified.
         */

      case F_SETOWN:
        /* If fildes refers to a socket, set the process or process group ID specified
         * to receive SIGURG signals when out-of-band data is available, using the value
         * of the third argument, arg, taken as type int. Positive values indicate a 
         * process ID; negative values, other than -1, indicate a process group ID. If
         * fildes does not refer to a socket, the results are unspecified.
         */

        err = EBADF; /* Only valid on socket descriptors */
        break;

      case F_GETLK:
        /* Get the first lock which blocks the lock description pointed to by the third
         * argument, arg, taken as a pointer to type struct flock, defined in <fcntl.h>.
         * The information retrieved shall overwrite the information passed to fcntl() in
         * the structure flock. If no lock is found that would prevent this lock from being
         * created, then the structure shall be left unchanged except for the lock type
         * which shall be set to F_UNLCK.
         */

      case F_SETLK:
        /* Set or clear a file segment lock according to the lock description pointed to
         * by the third argument, arg, taken as a pointer to type struct flock, defined in
         * <fcntl.h>. F_SETLK can establish shared (or read) locks (F_RDLCK) or exclusive
         * (or write) locks (F_WRLCK), as well  as  to  remove  either  type  of  lock  (F_UNLCK).
         * F_RDLCK, F_WRLCK, and F_UNLCK are defined in <fcntl.h>. If a shared or exclusive
         * lock cannot be set, fcntl() shall return immediately with a return value of -1.
         */

      case F_SETLKW:
        /* This command shall be equivalent to F_SETLK except that if a shared or exclusive
         * lock is blocked by other locks, the thread shall wait until the request can be
         * satisfied. If a signal that is to be caught is received while fcntl() is waiting
         * for a region, fcntl() shall be interrupted. Upon return from the signal handler,
         * fcntl() shall return -1 with errno set to [EINTR], and the lock operation shall
         * not be done.
         */

        err = ENOSYS; /* Not implemented */
        break;

      default:
        err = EINVAL;
        break;
    }

errout:
  if (err != 0)
    {
      set_errno(err);
      return ERROR;
    }

  return ret;
}

//.........这里部分代码省略.........
   * that CPU, the restart take effect.
   */

  cpu = sched_cpu_pause(&tcb->cmn);
#endif /* CONFIG_SMP */

  /* Try to recover from any bad states */

  task_recover((FAR struct tcb_s *)tcb);

  /* Kill any children of this thread */

#ifdef HAVE_GROUP_MEMBERS
  (void)group_killchildren(tcb);
#endif

  /* Remove the TCB from whatever list it is in.  After this point, the TCB
   * should no longer be accessible to the system
   */

#ifdef CONFIG_SMP
  tasklist = TLIST_HEAD(tcb->cmn.task_state, tcb->cmn.cpu);
#else
  tasklist = TLIST_HEAD(tcb->cmn.task_state);
#endif

  dq_rem((FAR dq_entry_t *)tcb, tasklist);
  tcb->cmn.task_state = TSTATE_TASK_INVALID;

  /* Deallocate anything left in the TCB's queues */

  sig_cleanup((FAR struct tcb_s *)tcb); /* Deallocate Signal lists */

  /* Reset the current task priority  */

  tcb->cmn.sched_priority = tcb->cmn.init_priority;

  /* The task should restart with pre-emption disabled and not in a critical
   * secton.
   */

  tcb->cmn.lockcount = 0;
#ifdef CONFIG_SMP
  tcb->cmn.irqcount  = 0;
#endif

  /* Reset the base task priority and the number of pending reprioritizations */

#ifdef CONFIG_PRIORITY_INHERITANCE
  tcb->cmn.base_priority = tcb->cmn.init_priority;
#  if CONFIG_SEM_NNESTPRIO > 0
  tcb->cmn.npend_reprio = 0;
#  endif
#endif

  /* Re-initialize the processor-specific portion of the TCB.  This will
   * reset the entry point and the start-up parameters
   */

  up_initial_state((FAR struct tcb_s *)tcb);

  /* Add the task to the inactive task list */

  dq_addfirst((FAR dq_entry_t *)tcb, (FAR dq_queue_t *)&g_inactivetasks);
  tcb->cmn.task_state = TSTATE_TASK_INACTIVE;

#ifdef CONFIG_SMP
  /* Resume the paused CPU (if any) */

  if (cpu >= 0)
    {
      ret = up_cpu_resume(cpu);
      if (ret < 0)
        {
          errcode = -ret;
          goto errout_with_lock;
        }
    }
#endif /* CONFIG_SMP */

  leave_critical_section(flags);

  /* Activate the task. */

  ret = task_activate((FAR struct tcb_s *)tcb);
  if (ret != OK)
    {
      (void)task_terminate(pid, true);
      errcode = -ret;
      goto errout_with_lock;
    }

  return OK;

errout_with_lock:
  leave_critical_section(flags);
errout:
  set_errno(errcode);
  return ERROR;
}

int CheckPerm(FCOM_T *comm_ptr, int permissions)
{
  uid_t uid;
  gid_t gid;

  /*-------------------------------------------------------------------*/
  /* Get group and user ID for current process.                        */
  /*-------------------------------------------------------------------*/
  FsGetId(&uid, &gid);

  /*-------------------------------------------------------------------*/
  /* Check if we need to look at read permissions.                     */
  /*-------------------------------------------------------------------*/
  if (permissions & F_READ)
  {
    /*-----------------------------------------------------------------*/
    /* If other has no read permission, check group.                   */
    /*-----------------------------------------------------------------*/
    if ((comm_ptr->mode & S_IROTH) == FALSE)
    {
      /*---------------------------------------------------------------*/
      /* If not in group or group has no read permission, check owner. */
      /*---------------------------------------------------------------*/
      if ((gid != comm_ptr->group_id) || !(comm_ptr->mode & S_IRGRP))
      {
        /*-------------------------------------------------------------*/
        /* If not user or user has no read permissions, return error.  */
        /*-------------------------------------------------------------*/
        if ((uid != comm_ptr->user_id) || !(comm_ptr->mode & S_IRUSR))
        {
          set_errno(EACCES);
          return -1;
        }
      }
    }
  }

  /*-------------------------------------------------------------------*/
  /* Check if we need to look at write permissions.                    */
  /*-------------------------------------------------------------------*/
  if (permissions & F_WRITE)
  {
    /*-----------------------------------------------------------------*/
    /* If other has no write permission, check group.                  */
    /*-----------------------------------------------------------------*/
    if ((comm_ptr->mode & S_IWOTH) == 0)
    {
      /*---------------------------------------------------------------*/
      /* If not in group or group has no write permission, check owner.*/
      /*---------------------------------------------------------------*/
      if ((gid != comm_ptr->group_id) || !(comm_ptr->mode & S_IWGRP))
      {
        /*-------------------------------------------------------------*/
        /* If not user or user has no write permissions, return error. */
        /*-------------------------------------------------------------*/
        if ((uid != comm_ptr->user_id) || !(comm_ptr->mode & S_IWUSR))
        {
          set_errno(EACCES);
          return -1;
        }
      }
    }
  }

  /*-------------------------------------------------------------------*/
  /* Check if we need to look at execute permissions.                  */
  /*-------------------------------------------------------------------*/
  if (permissions & F_EXECUTE)
  {
    /*-----------------------------------------------------------------*/
    /* If other has no execute permission, check group.                */
    /*-----------------------------------------------------------------*/
    if ((comm_ptr->mode & S_IXOTH) == 0)
    {
      /*---------------------------------------------------------------*/
      /* If not in group or group can't execute, check owner.          */
      /*---------------------------------------------------------------*/
      if ((gid != comm_ptr->group_id) || !(comm_ptr->mode & S_IXGRP))
      {
        /*-------------------------------------------------------------*/
        /* If not user or user can't execute, return error.            */
        /*-------------------------------------------------------------*/
        if ((uid != comm_ptr->user_id) || !(comm_ptr->mode & S_IXUSR))
        {
          set_errno(EACCES);
          return -1;
        }
      }
    }
  }
  return 0;
}

/*ARGSUSED*/
int
mach_sysconfig(int which)
{
	return (set_errno(EINVAL));
}

FAR void *shmat(int shmid, FAR const void *shmaddr, int shmflg)
{
  FAR struct shm_region_s *region;
  FAR struct task_group_s *group;
  FAR struct tcb_s *tcb;
  uintptr_t vaddr;
  unsigned int npages;
  int ret;

  /* Get the region associated with the shmid */

  DEBUGASSERT(shmid >= 0 && shmid < CONFIG_ARCH_SHM_MAXREGIONS);
  region =  &g_shminfo.si_region[shmid];
  DEBUGASSERT((region->sr_flags & SRFLAG_INUSE) != 0);

  /* Get the TCB and group containing our virtual memory allocator */

  tcb = sched_self();
  DEBUGASSERT(tcb && tcb->group);
  group = tcb->group;
  DEBUGASSERT(group->tg_shm.gs_handle != NULL &&
              group->tg_shm.gs_vaddr[shmid] == 0);

  /* Get exclusive access to the region data structure */

  ret = sem_wait(&region->sr_sem);
  if (ret < 0)
    {
      shmdbg("sem_wait failed: %d\n", ret);
      goto errout;
    }

  /* Set aside a virtual address space to span this physical region */

  vaddr = (uintptr_t)gran_alloc(group->tg_shm.gs_handle,
                                region->sr_ds.shm_segsz);
  if (vaddr == 0)
    {
      shmdbg("gran_alloc() failed\n");
      ret = -ENOMEM;
      goto errout_with_semaphore;
    }

  /* Convert the region size to pages */

  npages = MM_PGALIGNUP(region->sr_ds.shm_segsz);

  /* Attach, i.e, map, on shared memory region to the user virtual address. */

  ret = up_shmat(region->sr_pages, npages, vaddr);
  if (ret < 0)
    {
      shmdbg("up_shmat() failed\n");
      goto errout_with_vaddr;
    }

  /* Save the virtual address of the region.  We will need that in shmat()
   * to do the reverse lookup:  Give the virtual address of the region to
   * detach, we need to get the region table index.
   */

  group->tg_shm.gs_vaddr[shmid] = vaddr;

  /* Increment the count of processes attached to this region */

  region->sr_ds.shm_nattch++;

  /* Save the process ID of the the last operation */

  region->sr_ds.shm_lpid = tcb->pid;

  /* Save the time of the last shmat() */

  region->sr_ds.shm_atime = time(NULL);

  /* Release our lock on the entry */

  sem_post(&region->sr_sem);
  return (FAR void *)vaddr;

errout_with_vaddr:
  gran_free(group->tg_shm.gs_handle, (FAR void *)vaddr,
            region->sr_ds.shm_segsz);
errout_with_semaphore:
  sem_post(&region->sr_sem);
  set_errno(-ret);
errout:
  return (FAR void *)ERROR;
}

long fpathconf(int fid, int name)
{
  long rv;

#if OS_PARM_CHECK
  /*-------------------------------------------------------------------*/
  /* Ensure file descriptor is valid.                                  */
  /*-------------------------------------------------------------------*/
  if (fid < 0 || fid >= FOPEN_MAX)
  {
    set_errno(EBADF);
    return -1;
  }
#endif

  /*-------------------------------------------------------------------*/
  /* Return error if file is closed.                                   */
  /*-------------------------------------------------------------------*/
  if (Files[fid].ioctl == NULL)
  {
    set_errno(EBADF);
    return -1;
  }

  /*-------------------------------------------------------------------*/
  /* Based on the name variable, get the right value.                  */
  /*-------------------------------------------------------------------*/
  switch (name)
  {
    /*-----------------------------------------------------------------*/
    /* _PC_NAME_MAX and _PC_PATH_MAX have the same value.              */
    /*-----------------------------------------------------------------*/
    case _PC_NAME_MAX:
    case _PC_PATH_MAX:
    {
      rv = PATH_MAX;
      break;
    }

    case _PC_NO_TRUNC:
    {
      rv = _PATH_NO_TRUNC;
      break;
    }

    case _PC_LINK_MAX:
    {
      /*---------------------------------------------------------------*/
      /* The link counter is stored in a "ui8".                        */
      /*---------------------------------------------------------------*/
      rv = 255;
      break;
    }

    /*-----------------------------------------------------------------*/
    /* All other variables have no limit, so return -1 for them.       */
    /*-----------------------------------------------------------------*/
    default:
    {
      rv = -1;
      break;
    }
  }
  return rv;
}

long
lx_sysinfo(struct lx_sysinfo *sip)
{
	struct lx_sysinfo si;
	zone_t *zone = curthread->t_procp->p_zone;
	uint64_t zphysmem, zfreemem, ztotswap, zfreeswap;

	si.si_uptime = gethrestime_sec() - zone->zone_boot_time;

	/*
	 * We scale down the load in avenrun to allow larger load averages
	 * to fit in 32 bits.  Linux doesn't, so we remove the scaling
	 * here.
	 */
	si.si_loads[0] = zone->zone_avenrun[0] << FSHIFT;
	si.si_loads[1] = zone->zone_avenrun[1] << FSHIFT;
	si.si_loads[2] = zone->zone_avenrun[2] << FSHIFT;

	/*
	 * In linux each thread looks like a process, so we conflate the
	 * two in this stat as well.
	 */
	si.si_procs = (int32_t)zone->zone_nlwps;

	/*
	 * If memory or swap limits are set on the zone, use those, otherwise
	 * use the system values. physmem and freemem are in pages, but the
	 * zone values are in bytes. Likewise, ani_max and ani_free are in
	 * pages.
	 */
	if (zone->zone_phys_mem_ctl == UINT64_MAX) {
		zphysmem = physmem;
		zfreemem = freemem;
	} else {
		zphysmem = btop(zone->zone_phys_mem_ctl);
		zfreemem = btop(zone->zone_phys_mem_ctl - zone->zone_phys_mem);
	}

	if (zone->zone_max_swap_ctl == UINT64_MAX) {
		ztotswap = k_anoninfo.ani_max;
		zfreeswap = k_anoninfo.ani_free;
	} else {
		/*
		 * See the comment in swapctl for a description of how free is
		 * calculated within a zone.
		 */
		rctl_qty_t used;
		spgcnt_t avail;
		uint64_t max;

		avail = MAX((spgcnt_t)(availrmem - swapfs_minfree), 0);
		max = k_anoninfo.ani_max + k_anoninfo.ani_mem_resv + avail;

		mutex_enter(&zone->zone_mem_lock);
		ztotswap = btop(zone->zone_max_swap_ctl);
		used = btop(zone->zone_max_swap);
		mutex_exit(&zone->zone_mem_lock);

		zfreeswap = MIN(ztotswap, max) - used;
	}

	/*
	 * If the maximum memory stat is less than 1^20 pages (i.e. 4GB),
	 * then we report the result in bytes.  Otherwise we use pages.
	 * Once we start supporting >1TB systems/zones, we'll need a third
	 * option.
	 */
	if (MAX(zphysmem, ztotswap) < 1024 * 1024) {
		si.si_totalram = ptob(zphysmem);
		si.si_freeram = ptob(zfreemem);
		si.si_totalswap = ptob(ztotswap);
		si.si_freeswap = ptob(zfreeswap);
		si.si_mem_unit = 1;
	} else {
		si.si_totalram = zphysmem;
		si.si_freeram = zfreemem;
		si.si_totalswap = ztotswap;
		si.si_freeswap = zfreeswap;
		si.si_mem_unit = PAGESIZE;
	}
	si.si_bufferram = 0;
	si.si_sharedram = 0;

	/*
	 * These two stats refer to high physical memory.  If an
	 * application running in a Linux zone cares about this, then
	 * either it or we are broken.
	 */
	si.si_totalhigh = 0;
	si.si_freehigh = 0;

	if (copyout(&si, sip, sizeof (si)) != 0)
		return (set_errno(EFAULT));
	return (0);
}

/*
 * Buy-back from SunOS 4.x
 *
 * Like setgid() and setegid() combined -except- that non-root users
 * can change cr_rgid to cr_gid, and the semantics of cr_sgid are
 * subtly different.
 */
int
setregid(gid_t rgid, gid_t egid)
{
	proc_t *p;
	int error = EPERM;
	int do_nocd = 0;
	cred_t *cr, *newcr;
	ksid_t ksid, *ksp;
	zone_t	*zone = crgetzone(CRED());

	if ((rgid != -1 && !VALID_GID(rgid, zone)) ||
	    (egid != -1 && !VALID_GID(egid, zone)))
		return (set_errno(EINVAL));

	if (egid != -1 && egid > MAXUID) {
		if (ksid_lookupbygid(zone, egid, &ksid) != 0)
			return (set_errno(EINVAL));
		ksp = &ksid;
	} else {
		ksp = NULL;
	}
	/*
	 * Need to pre-allocate the new cred structure before grabbing
	 * the p_crlock mutex.
	 */
	newcr = cralloc_ksid();

	p = ttoproc(curthread);
	mutex_enter(&p->p_crlock);
	cr = p->p_cred;

	if ((rgid == -1 ||
	    rgid == cr->cr_rgid || rgid == cr->cr_gid || rgid == cr->cr_sgid) &&
	    (egid == -1 || egid == cr->cr_rgid || egid == cr->cr_gid ||
	    egid == cr->cr_sgid) ||
	    (error = secpolicy_allow_setid(cr, -1, B_FALSE)) == 0) {
		crhold(cr);
		crcopy_to(cr, newcr);
		p->p_cred = newcr;

		if (egid != -1) {
			newcr->cr_gid = egid;
			crsetsid(newcr, ksp, KSID_GROUP);
		}
		if (rgid != -1)
			newcr->cr_rgid = rgid;
		/*
		 * "If the real gid is being changed, or the effective gid is
		 * being changed to a value not equal to the real gid, the
		 * saved gid is set to the new effective gid."
		 */
		if (rgid != -1 ||
		    (egid != -1 && newcr->cr_gid != newcr->cr_rgid))
			newcr->cr_sgid = newcr->cr_gid;
		/*
		 * A privileged process that makes itself look like a
		 * set-gid process must be marked to produce no core dump.
		 */
		if ((cr->cr_gid != newcr->cr_gid ||
		    cr->cr_rgid != newcr->cr_rgid ||
		    cr->cr_sgid != newcr->cr_sgid) && error == 0)
			do_nocd = 1;
		error = 0;
		crfree(cr);
	}
	mutex_exit(&p->p_crlock);

	if (error == 0) {
		if (do_nocd) {
			mutex_enter(&p->p_lock);
			p->p_flag |= SNOCD;
			mutex_exit(&p->p_lock);
		}
		crset(p, newcr);	/* broadcast to process threads */
		return (0);
	}
	crfree(newcr);
	if (ksp != NULL)
		ksid_rele(ksp);
	return (set_errno(error));
}