diff options
Diffstat (limited to 'cpukit/libcsupport/src/write.c')
-rw-r--r-- | cpukit/libcsupport/src/write.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/write.c b/cpukit/libcsupport/src/write.c new file mode 100644 index 0000000000..4e08918ffb --- /dev/null +++ b/cpukit/libcsupport/src/write.c @@ -0,0 +1,78 @@ +/* + * write() - POSIX 1003.1b 6.4.2 - Write to 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.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/libio_.h> +#include <rtems/seterr.h> + +/* + * write + * + * This routine writes count bytes from from buffer pointed to by buffer + * to the file associated with the open file descriptor, fildes. + */ + +ssize_t write( + int fd, + const void *buffer, + size_t count +) +{ + ssize_t rc; + rtems_libio_t *iop; + + rtems_libio_check_fd( fd ); + iop = rtems_libio_iop( fd ); + rtems_libio_check_is_open(iop); + rtems_libio_check_buffer( buffer ); + rtems_libio_check_count( count ); + rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE ); + + /* + * Now process the write() request. + */ + + if ( !iop->handlers->write_h ) + rtems_set_errno_and_return_minus_one( ENOTSUP ); + + rc = (*iop->handlers->write_h)( iop, buffer, count ); + + if ( rc > 0 ) + iop->offset += rc; + + return rc; +} + +/* + * _write_r + * + * This is the Newlib dependent reentrant version of write(). + */ + +#if defined(RTEMS_NEWLIB) + +#include <reent.h> + +_ssize_t _write_r( + struct _reent *ptr, + int fd, + const void *buf, + size_t nbytes +) +{ + return write( fd, buf, nbytes ); +} +#endif |