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Diffstat (limited to 'cpukit/libcsupport/src/base_fs.c')
| -rw-r--r-- | cpukit/libcsupport/src/base_fs.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/base_fs.c b/cpukit/libcsupport/src/base_fs.c new file mode 100644 index 0000000000..b5681eda63 --- /dev/null +++ b/cpukit/libcsupport/src/base_fs.c @@ -0,0 +1,114 @@ +/* + * Base file system initialization + * + * COPYRIGHT (c) 1989-2008. + * 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 <rtems.h> +#include <rtems/libio.h> +#include <rtems/libio_.h> + +/* + * Default mode for created files. + */ + + +/* + * rtems_filesystem_initialize + * + * Initialize the foundation of the file system. This is specified + * by the structure rtems_filesystem_mount_table. The usual + * configuration is a single instantiation of the IMFS or miniIMFS with + * a single "/dev" directory in it. + */ + +void rtems_filesystem_initialize( void ) +{ + int status; + const rtems_filesystem_mount_table_t *mt; + rtems_filesystem_location_info_t loc; + + /* + * Set the default umask to "022". + */ + + rtems_filesystem_umask = 022; + + /* + * mount the first filesystem. + */ + if ( rtems_filesystem_mount_table_size == 0 ) + rtems_fatal_error_occurred( 0xABCD0001 ); + + mt = &rtems_filesystem_mount_table[0]; + + status = mount( mt->device, mt->mount_point, mt->type, mt->fsoptions, NULL ); + if ( status == -1 ) + rtems_fatal_error_occurred( 0xABCD0002 ); + + rtems_filesystem_link_counts = 0; + + /* setup the 'current' and 'root' directories + * + * NOTE: cloning the pathlocs is not strictly + * necessary. Since we implicitely let + * all threads that don't call + * libio_set_private_env() share the same + * (initial) 'root' and 'current' locs, + * we (also implicitely) assume that the + * root filesystem doesn't care about + * reference counts. + * I just inserted the code snippet below + * to remind everybody of the fact by + * making it more explicit... + * Ideally, every thread would have to + * call either share_private_env() or + * set_private_env() - but then: that's + * gonna hit performance. + * + * Till Straumann, 10/25/2002 + */ + /* Clone the root pathloc */ + rtems_filesystem_evaluate_path("/", 1, 0, &loc, 0); + rtems_filesystem_root = loc; + /* One more clone for the current node */ + rtems_filesystem_evaluate_path("/", 1, 0, &loc, 0); + rtems_filesystem_current = loc; + + /* Note: the global_env's refcnt doesn't matter + * as the global env is never released + */ + + + /* + * Traditionally RTEMS devices are under "/dev" so install this directory. + * + * If the mkdir() fails, we can't print anything so just fatal error. + * + * NOTE: UNIX root is 755 and owned by root/root (0/0). It is actually + * created that way by the IMFS. + */ + + status = mkdir( "/dev", 0777); + if ( status != 0 ) + rtems_fatal_error_occurred( 0xABCD0003 ); + + /* + * You can't mount another filesystem properly until the mount point + * it will be mounted onto is created. Moreover, if it is going to + * use a device, then it is REALLY unfair to attempt this + * before device drivers are initialized. So we return via a base + * filesystem image and nothing auto-mounted at this point. + */ +} |