forked from Imagelibrary/rtems
d40da79b04
* Makefile.am, preinstall.am, libcsupport/Makefile.am, libcsupport/include/rtems/libcsupport.h, libcsupport/include/rtems/libio.h, libcsupport/src/base_fs.c, libcsupport/src/libio_init.c, libcsupport/src/newlibc_exit.c, libcsupport/src/newlibc_init.c, libcsupport/src/sync.c, libfs/Makefile.am, libfs/src/imfs/deviceio.c, sapi/include/confdefs.h: Merge GSOC project code to add simple device only filesystem (devfs), optionally completely drop out filesystem, and to clean up disabling newlib reentrancy support. This dropped 17K from the minimum.exe for sparc/sis and arm/rtl22xx_t now has a 15K code space. * libcsupport/src/__usrenv.c, libcsupport/src/newlibc_reent.c, libfs/src/devfs/devclose.c, libfs/src/devfs/devfs.h, libfs/src/devfs/devfs_eval.c, libfs/src/devfs/devfs_init.c, libfs/src/devfs/devfs_mknod.c, libfs/src/devfs/devfs_node_type.c, libfs/src/devfs/devfs_show.c, libfs/src/devfs/devioctl.c, libfs/src/devfs/devopen.c, libfs/src/devfs/devread.c, libfs/src/devfs/devstat.c, libfs/src/devfs/devwrite.c, libfs/src/imfs/deviceerrno.c: New files. * libcsupport/src/newlibc.c: Removed.
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 = (char *)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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