diff options
Diffstat (limited to 'cpukit/libfs/src/imfs/imfs_creat.c')
| -rw-r--r-- | cpukit/libfs/src/imfs/imfs_creat.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_creat.c b/cpukit/libfs/src/imfs/imfs_creat.c new file mode 100644 index 0000000000..3b602d0c14 --- /dev/null +++ b/cpukit/libfs/src/imfs/imfs_creat.c @@ -0,0 +1,170 @@ +/* + * IMFS_create_node() + * + * Routine to create a new in memory file system node. + * + * COPYRIGHT (c) 1989-2010. + * On-Line Applications Research Corporation (OAR). + * + * 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 <stdlib.h> +#include <string.h> +#include "imfs.h" +#include <rtems/libio_.h> + +/* + * Create an IMFS filesystem node of an arbitrary type that is NOT + * the root directory node. + */ +IMFS_jnode_t *IMFS_create_node( + rtems_filesystem_location_info_t *parent_loc, + IMFS_jnode_types_t type, + const char *name, + mode_t mode, + const IMFS_types_union *info +) +{ + IMFS_jnode_t *node; + IMFS_jnode_t *parent; + IMFS_fs_info_t *fs_info; + + /* + * MUST have a parent node to call this routine. + */ + if ( parent_loc == NULL ) + return NULL; + + parent = parent_loc->node_access; + fs_info = parent_loc->mt_entry->fs_info; + + /* + * Reject creation of FIFOs if support is disabled. + */ + if ( type == IMFS_FIFO && + fs_info->fifo_handlers == &rtems_filesystem_handlers_default ) + return NULL; + + /* + * Allocate filesystem node and fill in basic information + */ + node = IMFS_allocate_node( type, name, mode & ~rtems_filesystem_umask ); + if ( !node ) + return NULL; + + /* + * Set the type specific information + */ + if ( type == IMFS_DIRECTORY ) { + rtems_chain_initialize_empty(&node->info.directory.Entries); + } else if ( type == IMFS_HARD_LINK ) { + node->info.hard_link.link_node = info->hard_link.link_node; + } else if ( type == IMFS_SYM_LINK ) { + node->info.sym_link.name = info->sym_link.name; + } else if ( type == IMFS_DEVICE ) { + node->info.device.major = info->device.major; + node->info.device.minor = info->device.minor; + } else if ( type == IMFS_LINEAR_FILE ) { + node->info.linearfile.size = 0; + node->info.linearfile.direct = 0; + } else if ( type == IMFS_MEMORY_FILE ) { + node->info.file.size = 0; + node->info.file.indirect = 0; + node->info.file.doubly_indirect = 0; + node->info.file.triply_indirect = 0; + } else if ( type == IMFS_FIFO ) { + node->info.fifo.pipe = NULL; + } else { + IMFS_assert(0); + } + + /* + * This node MUST have a parent, so put it in that directory list. + */ + node->Parent = parent; + node->st_ino = ++fs_info->ino_count; + + rtems_chain_append( &parent->info.directory.Entries, &node->Node ); + + return node; +} + +/* + * Allocate filesystem node and fill in basic information + */ +IMFS_jnode_t *IMFS_allocate_node( + IMFS_jnode_types_t type, + const char *name, + mode_t mode +) +{ + IMFS_jnode_t *node; + struct timeval tv; + + /* + * Allocate an IMFS jnode + */ + node = calloc( 1, sizeof( IMFS_jnode_t ) ); + if ( !node ) + return NULL; + + /* + * Fill in the basic information + */ + node->st_nlink = 1; + node->type = type; + strncpy( node->name, name, IMFS_NAME_MAX ); + + /* + * Fill in the mode and permission information for the jnode structure. + */ + node->st_mode = mode; + #if defined(RTEMS_POSIX_API) + node->st_uid = geteuid(); + node->st_gid = getegid(); + #else + node->st_uid = 0; + node->st_gid = 0; + #endif + + /* + * Now set all the times. + */ + gettimeofday( &tv, 0 ); + + node->stat_atime = (time_t) tv.tv_sec; + node->stat_mtime = (time_t) tv.tv_sec; + node->stat_ctime = (time_t) tv.tv_sec; + + return node; +} + +IMFS_jnode_t *IMFS_create_root_node(void) +{ + IMFS_jnode_t *node; + + /* + * Allocate filesystem node and fill in basic information + */ + node = IMFS_allocate_node( IMFS_DIRECTORY, "", (S_IFDIR | 0755) ); + if ( !node ) + return NULL; + + /* + * Set the type specific information + * + * NOTE: Root node is always a directory. + */ + rtems_chain_initialize_empty(&node->info.directory.Entries); + + return node; +} |