source: rtems/c/src/lib/libc/syscalls.c @ 866c465f

4.104.114.84.95
Last change on this file since 866c465f was 866c465f, checked in by Joel Sherrill <joel.sherrill@…>, on 01/19/98 at 22:27:56

more info from Eric

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*
2 *  RTEMS Fake System Calls
3 *
4 *  This file contains "fake" versions of the system call routines
5 *  which are reference by many libc implementations.  Once a routine
6 *  has been implemented in terms of RTEMS services, it should be
7 *  taken out of this file.
8 *
9 *  COPYRIGHT (c) 1989-1997.
10 *  On-Line Applications Research Corporation (OAR).
11 *  Copyright assigned to U.S. Government, 1994.
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.OARcorp.com/rtems/license.html.
16 *
17 *  $Id$
18 *
19 */
20
21#include <sys/types.h>
22#include <sys/stat.h>
23#include <assert.h>
24#include <errno.h>
25#include <string.h>
26#include <stdio.h>  /* only for puts */
27
28#include <rtems.h>
29#include <rtems/libio.h>
30
31#ifdef RTEMS_NEWLIB
32/*
33 *  fstat, stat, and isatty must lie consistently and report that everything
34 *  is a tty or stdout will not be line buffered.
35 */
36
37int __rtems_fstat(int _fd, struct stat* _sbuf)
38{
39#ifdef HAVE_BLKSIZE
40  _sbuf->st_blksize = 0;
41#endif
42
43  /*
44   * For now assume stdin/stdout/stderr are always a TTY line
45   *
46   *  From Eric Norum:
47   *
48   *  The `fix' is not complete.  It still doesn't properly handle
49   *  file descriptors for any files/devices other  than the console
50   *  serial lines.....
51   */
52  if (_fd <= 2) {
53    _sbuf->st_mode = S_IFCHR;
54  } else {
55    switch (rtems_file_descriptor_type (_fd)) {
56    case RTEMS_FILE_DESCRIPTOR_TYPE_SOCKET:
57      _sbuf->st_mode = S_IFSOCK;
58      break;
59
60    default:
61      puts( "__rtems_fstat -- unknown socket type" );
62      assert( 0 );
63    }
64  }
65  return 0;
66}
67
68int __rtems_isatty(int _fd)
69{
70  struct stat st;
71
72  if (__rtems_fstat(_fd, &st) < 0)
73    return 0;
74  return S_ISCHR (st.st_mode);
75}
76
77#if !defined(RTEMS_UNIX)
78int stat( const char *path, struct stat *buf )
79{
80  if ( strncmp( "/dev/", path, 5 ) ) {
81    return -1;
82  }
83  return __rtems_fstat( 0, buf );
84}
85
86int link( const char *existing, const char *new )
87{
88  /* always fail */
89  return -1;
90}
91
92int unlink( const char *path )
93{
94  /* always fail */
95  return -1;
96}
97
98char *getcwd( char *_buf, size_t _size)
99{
100
101/*  assert( FALSE ); */
102  errno = ENOSYS;
103  return 0;
104}
105int fork() {
106  puts( "fork -- not supported!!!" );
107  assert( 0 );
108  errno = ENOSYS;
109  return -1;
110}
111int execv(const char *_path, char * const _argv[] ) {
112  puts( "execv -- not supported!!!" );
113  assert( 0 );
114  errno = ENOSYS;
115  return -1;
116}
117int wait() {
118  puts( "wait -- not supported!!!" );
119  assert( 0 );
120  errno = ENOSYS;
121  return -1;
122}
123#endif
124
125#endif
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