source: rtems/cpukit/libcsupport/src/read.c @ 0eae36c7

4.104.114.84.95
Last change on this file since 0eae36c7 was 0eae36c7, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 4, 2003 at 6:54:13 PM

2003-09-04 Joel Sherrill <joel@…>

  • include/chain.h, include/clockdrv.h, include/console.h, include/iosupp.h, include/rtc.h, include/spurious.h, include/timerdrv.h, include/vmeintr.h, include/motorola/mc68230.h, include/rtems/libcsupport.h, include/rtems/libio.h, include/rtems/libio_.h, include/rtems/termiostypes.h, include/sys/termios.h, include/zilog/z8036.h, include/zilog/z8530.h, include/zilog/z8536.h, src/brk.c, src/gettod.c, src/sbrk.c, src/times.c, src/access.c, src/base_fs.c, src/cfgetispeed.c, src/cfgetospeed.c, src/cfsetispeed.c, src/cfsetospeed.c, src/chdir.c, src/chmod.c, src/chown.c, src/chroot.c, src/close.c, src/ctermid.c, src/dup.c, src/dup2.c, src/eval.c, src/fchdir.c, src/fchmod.c, src/fcntl.c, src/fdatasync.c, src/fpathconf.c, src/fs_null_handlers.c, src/fstat.c, src/fsync.c, src/ftruncate.c, src/getdents.c, src/getpwent.c, src/hosterr.c, src/ioctl.c, src/isatty.c, src/libio.c, src/libio_sockets.c, src/link.c, src/lseek.c, src/lstat.c, src/malloc.c, src/mallocfreespace.c, src/mkdir.c, src/mkfifo.c, src/mknod.c, src/mount.c, src/newlibc.c, src/no_libc.c, src/no_posix.c, src/open.c, src/pathconf.c, src/pipe.c, src/privateenv.c, src/read.c, src/readlink.c, src/rewinddir.c, src/rmdir.c, src/seekdir.c, src/stat.c, src/symlink.c, src/sync.c, src/tcdrain.c, src/tcflow.c, src/tcflush.c, src/tcgetattr.c, src/tcgetprgrp.c, src/tcsendbreak.c, src/tcsetattr.c, src/tcsetpgrp.c, src/telldir.c, src/termios.c, src/termiosinitialize.c, src/truncate.c, src/umask.c, src/unixlibc.c, src/unlink.c, src/unmount.c, src/utime.c, src/write.c: URL for license changed.
  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 *  read() - POSIX 1003.1b 6.4.1 - Read From a File
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <rtems/libio_.h>
19#include <rtems/seterr.h>
20
21ssize_t read(
22  int         fd,
23  void       *buffer,
24  size_t      count
25)
26{
27  int             rc;  /* XXX change to a size_t when prototype is fixed */
28  rtems_libio_t *iop;
29
30  rtems_libio_check_fd( fd );
31  iop = rtems_libio_iop( fd );
32  rtems_libio_check_is_open(iop);
33  rtems_libio_check_buffer( buffer );
34  rtems_libio_check_count( count );
35  rtems_libio_check_permissions( iop, LIBIO_FLAGS_READ );
36
37  /*
38   *  Now process the read().
39   */
40
41  if ( !iop->handlers->read_h )
42    rtems_set_errno_and_return_minus_one( ENOTSUP );
43
44  rc = (*iop->handlers->read_h)( iop, buffer, count );
45
46  if ( rc > 0 )
47    iop->offset += rc;
48
49  return rc;
50}
51
52/*
53 *  _read_r
54 *
55 *  This is the Newlib dependent reentrant version of read().
56 */
57
58#if defined(RTEMS_NEWLIB)
59
60#include <reent.h>
61
62_ssize_t _read_r(
63  struct _reent *ptr,
64  int            fd,
65  void          *buf,
66  size_t         nbytes
67)
68{
69  return read( fd, buf, nbytes );
70}
71#endif
Note: See TracBrowser for help on using the repository browser.