mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-26 16:43:51 +08:00
Ralf Corsepius
48943dc195
* libfs/src/devfs/devfs_mknod.c: Remove const cast. * libfs/src/imfs/ioman.c: Remove const cast. * libfs/src/devfs/devfs.h: Make device_name a const char*. * sapi/include/rtems/io.h: Make device_name a const char*.
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <rtems/seterr.h>
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#include "devfs.h"
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int devFS_mknod(
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const char *path,
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mode_t mode,
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dev_t dev,
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rtems_filesystem_location_info_t *pathloc
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)
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{
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int i;
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int slot;
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rtems_device_name_t *device_name_table;
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rtems_device_major_number major;
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rtems_device_minor_number minor;
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ISR_Level level;
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/*
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* This is a special case. In rtems_filesystem_initialize,
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* a special device '/dev' will be created. We check this
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* condition and do not create the '/dev' and the 'path'
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* actually passed in is 'dev', not '/dev'. Just return 0 to
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* indicate we are OK.
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*/
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if ((path[0] == 'd') && (path[1] == 'e') &&
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(path[2] == 'v') && (path[3] == '\0'))
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return 0;
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/* must be a character device or a block device */
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if (!S_ISBLK(mode) && !S_ISCHR(mode))
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rtems_set_errno_and_return_minus_one( EINVAL );
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else
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rtems_filesystem_split_dev_t(dev, major, minor);
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/* Find an empty slot in device name table */
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device_name_table = (rtems_device_name_t *)pathloc->node_access;
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if (!device_name_table)
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rtems_set_errno_and_return_minus_one( EFAULT );
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for (slot = -1, i = 0; i < rtems_device_table_size; i++){
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if (device_name_table[i].device_name == NULL)
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slot = i;
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else
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if (strcmp(path, device_name_table[i].device_name) == 0)
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rtems_set_errno_and_return_minus_one( EEXIST );
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}
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if (slot == -1)
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rtems_set_errno_and_return_minus_one( ENOMEM );
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_ISR_Disable(level);
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device_name_table[slot].device_name = path;
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device_name_table[slot].device_name_length = strlen(path);
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device_name_table[slot].major = major;
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device_name_table[slot].minor = minor;
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device_name_table[slot].mode = mode;
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_ISR_Enable(level);
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return 0;
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}
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