4.104.114.84.95
Last change
on this file since 364d75b was
9c49db4,
checked in by Joel Sherrill <joel.sherrill@…>, on 01/08/01 at 18:26:44
|
2001-01-08 Ralf Corsepius <corsepiu@…>
- configure.in: Add libc/config.h
- libc/Makefile.am: Add INCLUDES += -I. to pickup config.h
- libc/.cvsignore: Add config.h and stamp-h
- libc/*.c: Add config.h support.
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-
Property mode set to
100644
|
File size:
1.3 KB
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Rev | Line | |
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[07a3253d] | 1 | /* |
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| 2 | * read() - POSIX 1003.1b 6.4.1 - Read From a File |
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| 3 | * |
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[08311cc3] | 4 | * COPYRIGHT (c) 1989-1999. |
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[07a3253d] | 5 | * On-Line Applications Research Corporation (OAR). |
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| 6 | * |
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| 7 | * The license and distribution terms for this file may be |
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| 8 | * found in the file LICENSE in this distribution or at |
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| 9 | * http://www.OARcorp.com/rtems/license.html. |
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| 10 | * |
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| 11 | * $Id$ |
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| 12 | */ |
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| 13 | |
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[9c49db4] | 14 | #if HAVE_CONFIG_H |
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| 15 | #include "config.h" |
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| 16 | #endif |
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| 17 | |
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[3ba74c73] | 18 | #include <rtems/libio_.h> |
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[07a3253d] | 19 | |
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[e22d644] | 20 | ssize_t read( |
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[07a3253d] | 21 | int fd, |
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| 22 | void *buffer, |
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[e22d644] | 23 | size_t count |
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[07a3253d] | 24 | ) |
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| 25 | { |
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| 26 | int rc; /* XXX change to a size_t when prototype is fixed */ |
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| 27 | rtems_libio_t *iop; |
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| 28 | |
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[cca4400] | 29 | rtems_libio_check_fd( fd ); |
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| 30 | iop = rtems_libio_iop( fd ); |
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[2d733c42] | 31 | rtems_libio_check_is_open(iop); |
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[cca4400] | 32 | rtems_libio_check_buffer( buffer ); |
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| 33 | rtems_libio_check_count( count ); |
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| 34 | rtems_libio_check_permissions( iop, LIBIO_FLAGS_READ ); |
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| 35 | |
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[07a3253d] | 36 | /* |
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| 37 | * Now process the read(). |
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| 38 | */ |
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| 39 | |
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[9c3fa30] | 40 | if ( !iop->handlers->read_h ) |
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[07a3253d] | 41 | set_errno_and_return_minus_one( ENOTSUP ); |
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| 42 | |
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[9c3fa30] | 43 | rc = (*iop->handlers->read_h)( iop, buffer, count ); |
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[07a3253d] | 44 | |
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| 45 | if ( rc > 0 ) |
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| 46 | iop->offset += rc; |
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| 47 | |
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| 48 | return rc; |
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| 49 | } |
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| 50 | |
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| 51 | /* |
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| 52 | * _read_r |
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| 53 | * |
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| 54 | * This is the Newlib dependent reentrant version of read(). |
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| 55 | */ |
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| 56 | |
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| 57 | #if defined(RTEMS_NEWLIB) |
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| 58 | |
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| 59 | #include <reent.h> |
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| 60 | |
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| 61 | _ssize_t _read_r( |
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| 62 | struct _reent *ptr, |
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| 63 | int fd, |
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| 64 | void *buf, |
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| 65 | size_t nbytes |
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| 66 | ) |
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| 67 | { |
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| 68 | return read( fd, buf, nbytes ); |
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| 69 | } |
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| 70 | #endif |
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