diff options
Diffstat (limited to '')
| -rw-r--r-- | c/src/exec/libcsupport/src/open.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/c/src/exec/libcsupport/src/open.c b/c/src/exec/libcsupport/src/open.c deleted file mode 100644 index f36f74d4ac..0000000000 --- a/c/src/exec/libcsupport/src/open.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * open() - POSIX 1003.1 5.3.1 - Open a File - * - * COPYRIGHT (c) 1989-1999. - * 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.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#if HAVE_CONFIG_H -#include "config.h" -#endif - -#include <stdarg.h> -#include <fcntl.h> -#include <rtems/libio_.h> -#include <rtems/seterr.h> - -#include <unistd.h> - -/* - * Returns file descriptor on success or -1 and errno set to one of the - * following: - * - * EACCESS - Seach permission is denied on a component of the path prefix, - * or the file exists and the permissions specified by the - * flags are denied, or the file does not exist and write - * permission is denied for the parent directory of the file - * to be created, or O_TRUNC is specified and write permission - * is denied. - * EEXIST - O_CREAT and O_EXCL are set and the named file exists. - * EINTR - The open( operation was interrupted by a signal. - * EINVAL - This implementation does not support synchronized IO for this - * file. - * EISDIR - The named file is a directory and the flags argument - * specified write or read/write access. - * EMFILE - Too many file descriptors are in used by this process. - * ENAMETOOLONG - - * The length of the path exceeds PATH_MAX or a pathname - * component is longer than NAME_MAX while POSIX_NO_TRUNC - * is in effect. - * ENFILE - Too many files are open in the system. - * ENOENT - O_CREAT is not set and and the anmed file does not exist, - * or O_CREAT is set and eitehr the path prefix does not exist - * or the path argument points to an empty string. - * ENOSPC - The directory or file system that would contain the new file - * cannot be extended. - * ENOTDIR - A component of the path prefix is not a directory. - * ENXIO - O_NONBLOCK is set, the named file is a FIFO, O_WRONLY is - * set, and no process has the file open for reading. - * EROFS - The named file resides on a read-only file system and either - * O_WRONLY, O_RDWR, O_CREAT (if the file does not exist), or - * O_TRUNC is set in the flags argument. - */ - -int open( - const char *pathname, - int flags, - ... -) -{ - va_list ap; - int mode; - int rc; - rtems_libio_t *iop = 0; - int status; - rtems_filesystem_location_info_t loc; - rtems_filesystem_location_info_t *loc_to_free = NULL; - int eval_flags; - - - /* - * Set the Evaluation flags - */ - - eval_flags = 0; - status = flags + 1; - if ( ( status & _FREAD ) == _FREAD ) - eval_flags |= RTEMS_LIBIO_PERMS_READ; - if ( ( status & _FWRITE ) == _FWRITE ) - eval_flags |= RTEMS_LIBIO_PERMS_WRITE; - - - va_start(ap, flags); - - mode = va_arg( ap, int ); - - /* - * NOTE: This comment is OBSOLETE. The proper way to do this now - * would be to support a magic mounted file system. - * - * Additional external I/O handlers would be supported by adding - * code to pick apart the pathname appropriately. The networking - * code does not require changes here since network file - * descriptors are obtained using socket(), not open(). - */ - - /* allocate a file control block */ - iop = rtems_libio_allocate(); - if ( iop == 0 ) { - rc = ENFILE; - goto done; - } - - /* - * See if the file exists. - */ - - status = rtems_filesystem_evaluate_path( - pathname, eval_flags, &loc, TRUE ); - - if ( status == -1 ) { - if ( errno != ENOENT ) { - rc = errno; - goto done; - } - - /* If the file does not exist and we are not trying to create it--> error */ - if ( !(flags & O_CREAT) ) { - rc = ENOENT; - goto done; - } - - /* Create the node for the new regular file */ - rc = mknod( pathname, S_IFREG | mode, 0LL ); - if ( rc ) { - rc = errno; - goto done; - } - - /* Sanity check to see if the file name exists after the mknod() */ - status = rtems_filesystem_evaluate_path( pathname, 0x0, &loc, TRUE ); - if ( status != 0 ) { /* The file did not exist */ - rc = EACCES; - goto done; - } - - } else if ((flags & (O_EXCL|O_CREAT)) == (O_EXCL|O_CREAT)) { - /* We were trying to create a file that already exists */ - rc = EEXIST; - loc_to_free = &loc; - goto done; - } - - loc_to_free = &loc; - - /* - * Fill in the file control block based on the loc structure - * returned by successful path evaluation. - */ - - iop->handlers = loc.handlers; - iop->file_info = loc.node_access; - iop->flags |= rtems_libio_fcntl_flags( flags ); - iop->pathinfo = loc; - - if ( !iop->handlers->open_h ) { - rc = ENOTSUP; - goto done; - } - - rc = (*iop->handlers->open_h)( iop, pathname, flags, mode ); - if ( rc ) - goto done; - - /* - * Optionally truncate the file. - */ - - if ( (flags & O_TRUNC) == O_TRUNC ) { - rc = ftruncate( iop - rtems_libio_iops, 0 ); - } - - /* - * Single exit and clean up path. - */ - -done: - va_end(ap); - - if ( rc ) { - if ( iop ) - rtems_libio_free( iop ); - if ( loc_to_free ) - rtems_filesystem_freenode( loc_to_free ); - rtems_set_errno_and_return_minus_one( rc ); - } - - return iop - rtems_libio_iops; -} - -/* - * _open_r - * - * This is the Newlib dependent reentrant version of open(). - */ - -#if defined(RTEMS_NEWLIB) - -#include <reent.h> - -int _open_r( - struct _reent *ptr, - const char *buf, - int flags, - int mode -) -{ - return open( buf, flags, mode ); -} -#endif |