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/*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <rtems/seterr.h>
#include "devfs.h"
int devFS_mknod(
const char *path,
mode_t mode,
dev_t dev,
rtems_filesystem_location_info_t *pathloc
)
{
int i;
int slot;
rtems_device_name_t *device_name_table;
rtems_device_major_number major;
rtems_device_minor_number minor;
ISR_Level level;
/*
* This is a special case. In rtems_filesystem_initialize,
* a special device '/dev' will be created. We check this
* condition and do not create the '/dev' and the 'path'
* actually passed in is 'dev', not '/dev'. Just return 0 to
* indicate we are OK.
*/
if ((path[0] == 'd') && (path[1] == 'e') &&
(path[2] == 'v') && (path[3] == '\0'))
return 0;
/* must be a character device or a block device */
if (!S_ISBLK(mode) && !S_ISCHR(mode))
rtems_set_errno_and_return_minus_one( EINVAL );
else
rtems_filesystem_split_dev_t(dev, major, minor);
/* Find an empty slot in device name table */
device_name_table = (rtems_device_name_t *)pathloc->node_access;
if (!device_name_table)
rtems_set_errno_and_return_minus_one( EFAULT );
for (slot = -1, i = 0; i < rtems_device_table_size; i++){
if (device_name_table[i].device_name == NULL)
slot = i;
else
if (strcmp(path, device_name_table[i].device_name) == 0)
rtems_set_errno_and_return_minus_one( EEXIST );
}
if (slot == -1)
rtems_set_errno_and_return_minus_one( ENOMEM );
_ISR_Disable(level);
device_name_table[slot].device_name = path;
device_name_table[slot].device_name_length = strlen(path);
device_name_table[slot].major = major;
device_name_table[slot].minor = minor;
device_name_table[slot].mode = mode;
_ISR_Enable(level);
return 0;
}
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