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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-05-14 15:19:20 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-05-15 10:01:42 +0200 |
commit | fed66f991014f40430b256d44231a7828bb8a413 (patch) | |
tree | 776084d409f4c21ed84c1c2da4d65993f10ef588 /cpukit/libcsupport/src/sup_fs_deviceio.c | |
parent | Filesystem: Use ioctl_command_t (diff) | |
download | rtems-fed66f991014f40430b256d44231a7828bb8a413.tar.bz2 |
Filesystem: Add shared device IO support
The device IO file system support in IMFS, devFS, and RFS uses now a
shared implementation.
Diffstat (limited to '')
-rw-r--r-- | cpukit/libcsupport/src/sup_fs_deviceio.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/sup_fs_deviceio.c b/cpukit/libcsupport/src/sup_fs_deviceio.c new file mode 100644 index 0000000000..aeff60ea83 --- /dev/null +++ b/cpukit/libcsupport/src/sup_fs_deviceio.c @@ -0,0 +1,128 @@ +/* + * COPYRIGHT (c) 1989-2012. + * 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. + */ + +#if HAVE_CONFIG_H + #include "config.h" +#endif + +#include <rtems/deviceio.h> + +int rtems_deviceio_open( + rtems_libio_t *iop, + const char *path, + int oflag, + mode_t mode, + rtems_device_major_number major, + rtems_device_minor_number minor +) +{ + rtems_status_code status; + rtems_libio_open_close_args_t args; + + args.iop = iop; + args.flags = iop->flags; + args.mode = mode; + + status = rtems_io_open( major, minor, &args ); + + return rtems_deviceio_errno( status ); +} + +int rtems_deviceio_close( + rtems_libio_t *iop, + rtems_device_major_number major, + rtems_device_minor_number minor +) +{ + rtems_status_code status; + rtems_libio_open_close_args_t args; + + args.iop = iop; + args.flags = 0; + args.mode = 0; + + status = rtems_io_close( major, minor, &args ); + + return rtems_deviceio_errno( status ); +} + +ssize_t rtems_deviceio_read( + rtems_libio_t *iop, + void *buf, + size_t nbyte, + rtems_device_major_number major, + rtems_device_minor_number minor +) +{ + rtems_status_code status; + rtems_libio_rw_args_t args; + + args.iop = iop; + args.offset = iop->offset; + args.buffer = buf; + args.count = nbyte; + args.flags = iop->flags; + args.bytes_moved = 0; + + status = rtems_io_read( major, minor, &args ); + if ( status == RTEMS_SUCCESSFUL ) { + return (ssize_t) args.bytes_moved; + } else { + return rtems_deviceio_errno( status ); + } +} + +ssize_t rtems_deviceio_write( + rtems_libio_t *iop, + const void *buf, + size_t nbyte, + rtems_device_major_number major, + rtems_device_minor_number minor +) +{ + rtems_status_code status; + rtems_libio_rw_args_t args; + + args.iop = iop; + args.offset = iop->offset; + args.buffer = buf; + args.count = nbyte; + args.flags = iop->flags; + args.bytes_moved = 0; + + status = rtems_io_write( major, minor, &args ); + if ( status == RTEMS_SUCCESSFUL ) { + return (ssize_t) args.bytes_moved; + } else { + return rtems_deviceio_errno( status ); + } +} + +int rtems_deviceio_control( + rtems_libio_t *iop, + ioctl_command_t command, + void *buffer, + rtems_device_major_number major, + rtems_device_minor_number minor +) +{ + rtems_status_code status; + rtems_libio_ioctl_args_t args; + + args.iop = iop; + args.command = command; + args.buffer = buffer; + + status = rtems_io_control( major, minor, &args ); + if ( status == RTEMS_SUCCESSFUL ) { + return args.ioctl_return; + } else { + return rtems_deviceio_errno(status); + } +} |