source:
rtems/c/src/exec/libcsupport/src/write.c
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9c3fa30
Last change on this file since 9c3fa30 was 9c3fa30, checked in by Joel Sherrill <joel.sherrill@…>, on 09/28/00 at 20:19:23 | |
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1 | /* |
2 | * write() - POSIX 1003.1b 6.4.2 - Write to 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.OARcorp.com/rtems/license.html. |
10 | * |
11 | * $Id$ |
12 | */ |
13 | |
14 | #include "libio_.h" |
15 | |
16 | |
17 | /* |
18 | * write |
19 | * |
20 | * This routine writes count bytes from from buffer pointed to by buffer |
21 | * to the file associated with the open file descriptor, fildes. |
22 | */ |
23 | |
24 | ssize_t write( |
25 | int fd, |
26 | const void *buffer, |
27 | size_t count |
28 | ) |
29 | { |
30 | rtems_status_code rc; |
31 | rtems_libio_t *iop; |
32 | |
33 | rtems_libio_check_fd( fd ); |
34 | iop = rtems_libio_iop( fd ); |
35 | rtems_libio_check_is_open(iop); |
36 | rtems_libio_check_buffer( buffer ); |
37 | rtems_libio_check_count( count ); |
38 | rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE ); |
39 | |
40 | /* |
41 | * Now process the write() request. |
42 | */ |
43 | |
44 | if ( !iop->handlers->write_h ) |
45 | set_errno_and_return_minus_one( ENOTSUP ); |
46 | |
47 | rc = (*iop->handlers->write_h)( iop, buffer, count ); |
48 | |
49 | if ( rc > 0 ) |
50 | iop->offset += rc; |
51 | |
52 | return rc; |
53 | } |
54 | |
55 | /* |
56 | * _write_r |
57 | * |
58 | * This is the Newlib dependent reentrant version of write(). |
59 | */ |
60 | |
61 | #if defined(RTEMS_NEWLIB) |
62 | |
63 | #include <reent.h> |
64 | |
65 | long _write_r( |
66 | struct _reent *ptr, |
67 | int fd, |
68 | const void *buf, |
69 | size_t nbytes |
70 | ) |
71 | { |
72 | return write( fd, buf, nbytes ); |
73 | } |
74 | #endif |
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