diff options
Diffstat (limited to 'cpukit/libcsupport/src/__usrenv.c')
| -rw-r--r-- | cpukit/libcsupport/src/__usrenv.c | 247 |
1 files changed, 239 insertions, 8 deletions
diff --git a/cpukit/libcsupport/src/__usrenv.c b/cpukit/libcsupport/src/__usrenv.c index 0b3469fa1a..d26e73658f 100644 --- a/cpukit/libcsupport/src/__usrenv.c +++ b/cpukit/libcsupport/src/__usrenv.c @@ -2,6 +2,9 @@ * COPYRIGHT (c) 1989-2008. * On-Line Applications Research Corporation (OAR). * + * Modifications to support reference counting in the file system are + * Copyright (c) 2012 embedded brains GmbH. + * * 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. @@ -10,18 +13,246 @@ */ #if HAVE_CONFIG_H -#include "config.h" + #include "config.h" #endif -#include <rtems.h> -#include <rtems/libio.h> +#include <sys/stat.h> + #include <rtems/libio_.h> -/* - * Global information for POSIX Process Environment Support - */ +static int null_handler_open( + rtems_libio_t *iop, + const char *path, + int oflag, + mode_t mode +) +{ + return -1; +} + +static int null_handler_fstat( + const rtems_filesystem_location_info_t *pathloc, + struct stat *buf +) +{ + return -1; +} + +const rtems_filesystem_file_handlers_r rtems_filesystem_null_handlers = { + .open_h = null_handler_open, + .close_h = rtems_filesystem_default_close, + .read_h = rtems_filesystem_default_read, + .write_h = rtems_filesystem_default_write, + .ioctl_h = rtems_filesystem_default_ioctl, + .lseek_h = rtems_filesystem_default_lseek, + .fstat_h = null_handler_fstat, + .ftruncate_h = rtems_filesystem_default_ftruncate, + .fsync_h = rtems_filesystem_default_fsync, + .fdatasync_h = rtems_filesystem_default_fdatasync, + .fcntl_h = rtems_filesystem_default_fcntl +}; + +static void null_op_lock_or_unlock( + rtems_filesystem_mount_table_entry_t *mt_entry +) +{ + /* Do nothing */ +} + +static int null_op_mknod( + const rtems_filesystem_location_info_t *parentloc, + const char *name, + size_t namelen, + mode_t mode, + dev_t dev +) +{ + return -1; +} + +static int null_op_rmnod( + const rtems_filesystem_location_info_t *parentloc, + const rtems_filesystem_location_info_t *loc +) +{ + return -1; +} + +static int null_op_link( + const rtems_filesystem_location_info_t *parentloc, + const rtems_filesystem_location_info_t *targetloc, + const char *name, + size_t namelen +) +{ + return -1; +} + +static int null_op_fchmod( + const rtems_filesystem_location_info_t *pathloc, + mode_t mode +) +{ + return -1; +} + +static int null_op_chown( + const rtems_filesystem_location_info_t *loc, + uid_t owner, + gid_t group +) +{ + return -1; +} + +static int null_op_clonenode( + rtems_filesystem_location_info_t *loc +) +{ + return -1; +} + +static int null_op_mount( + rtems_filesystem_mount_table_entry_t *mt_entry +) +{ + return -1; +} + +static int null_op_fsmount_me( + rtems_filesystem_mount_table_entry_t *mt_entry, + const void *data +) +{ + return -1; +} + +static int null_op_unmount( + rtems_filesystem_mount_table_entry_t *mt_entry +) +{ + return -1; +} + +static void null_op_fsunmount_me( + rtems_filesystem_mount_table_entry_t *mt_entry +) +{ + /* Do nothing */ +} + +static int null_op_utime( + const rtems_filesystem_location_info_t *loc, + time_t actime, + time_t modtime +) +{ + return -1; +} + +static int null_op_symlink( + const rtems_filesystem_location_info_t *parentloc, + const char *name, + size_t namelen, + const char *target +) +{ + return -1; +} + +static ssize_t null_op_readlink( + const rtems_filesystem_location_info_t *loc, + char *buf, + size_t bufsize +) +{ + return -1; +} + +static int null_op_rename( + const rtems_filesystem_location_info_t *oldparentloc, + const rtems_filesystem_location_info_t *oldloc, + const rtems_filesystem_location_info_t *newparentloc, + const char *name, + size_t namelen +) +{ + return -1; +} + +static int null_op_statvfs( + const rtems_filesystem_location_info_t *loc, + struct statvfs *buf +) +{ + return -1; +} + +static const rtems_filesystem_operations_table null_ops = { + .lock_h = null_op_lock_or_unlock, + .unlock_h = null_op_lock_or_unlock, + .eval_path_h = rtems_filesystem_default_eval_path, + .link_h = null_op_link, + .are_nodes_equal_h = rtems_filesystem_default_are_nodes_equal, + .node_type_h = rtems_filesystem_default_node_type, + .mknod_h = null_op_mknod, + .rmnod_h = null_op_rmnod, + .fchmod_h = null_op_fchmod, + .chown_h = null_op_chown, + .clonenod_h = null_op_clonenode, + .freenod_h = rtems_filesystem_default_freenode, + .mount_h = null_op_mount, + .fsmount_me_h = null_op_fsmount_me, + .unmount_h = null_op_unmount, + .fsunmount_me_h = null_op_fsunmount_me, + .utime_h = null_op_utime, + .symlink_h = null_op_symlink, + .readlink_h = null_op_readlink, + .rename_h = null_op_rename, + .statvfs_h = null_op_statvfs +}; + +rtems_filesystem_mount_table_entry_t rtems_filesystem_null_mt_entry = { + .location_chain = { + .Head = { + .Node = { + .next = &rtems_filesystem_global_location_null.location.mt_entry_node, + .previous = NULL + }, + .fill = &rtems_filesystem_global_location_null.location.mt_entry_node, + } + }, + .mt_point_node = &rtems_filesystem_global_location_null, + .mt_fs_root = &rtems_filesystem_global_location_null, + .mounted = false, + .writeable = false +}; + +rtems_filesystem_global_location_t rtems_filesystem_global_location_null = { + .location = { + .mt_entry_node = { + .next = &rtems_filesystem_null_mt_entry.location_chain.Tail.Node, + .previous = &rtems_filesystem_null_mt_entry.location_chain.Head.Node + }, + .handlers = &rtems_filesystem_null_handlers, + .ops = &null_ops, + .mt_entry = &rtems_filesystem_null_mt_entry + }, -rtems_user_env_t rtems_global_user_env; -rtems_user_env_t * rtems_current_user_env = &rtems_global_user_env; + /* + * The initial reference count accounts for the following references + * o the root directory of the user environment, + * o the current directory of the user environment, + * o the root node of the null file system instance, and + * o the mount point node of the null file system instance. + */ + .reference_count = 4 +}; +rtems_user_env_t rtems_global_user_env = { + .current_directory = &rtems_filesystem_global_location_null, + .root_directory = &rtems_filesystem_global_location_null, + .umask = S_IWGRP | S_IWOTH +}; +rtems_user_env_t *rtems_current_user_env = &rtems_global_user_env; |