source: rtems/c/src/tests/psxtests/filesupp/test_cat.c @ 0895bdb

4.104.114.84.9
Last change on this file since 0895bdb was 0895bdb, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 23, 1998 at 6:57:48 PM

Added tests in support of the file system infrastructure.

  • Property mode set to 100644
File size: 1.6 KB
Line 
1/*
2 *  A test support function which performs a crude version of
3 *  "cat" so you can look at specific parts of a file.
4 *
5 *  $Id$
6 */
7
8#include <stdio.h>
9
10#include <sys/types.h>
11#include <sys/stat.h>
12#include <fcntl.h>
13#include <unistd.h>
14#include <errno.h>
15#include <string.h>
16#include <ctype.h>
17
18#include <assert.h>
19
20/*
21 *  test_cat routine
22 */
23
24unsigned char test_cat_buffer[ 1024 ];
25
26void test_cat(
27  char *file,
28  int   offset_arg,
29  int   length
30)
31{
32  int            fd;
33  int            status;
34  int            is_printable = 0;
35  int            my_length;
36  int            i;
37  unsigned char  c;
38  int            count = 0;
39  off_t          offset = (off_t)offset_arg;
40
41  my_length = (length) ? length : sizeof( test_cat_buffer );
42  assert( my_length <= sizeof( test_cat_buffer ) );
43
44  fd = open( file, O_RDONLY );
45  if ( fd == -1 ) {
46    printf( "test_cat: open( %s ) failed : %s\n", file, strerror( errno ) );
47    exit( 0 );
48  }
49
50  for ( ;; ) {
51    status = lseek( fd, offset, SEEK_SET );
52    assert( !status );
53
54    status = read( fd, test_cat_buffer, sizeof(test_cat_buffer) );
55    if ( status <= 0 ) {
56      if (!is_printable)
57        printf( "(%d)", count );
58      puts( "" );
59      break;
60    }
61
62    for ( i=0 ; i<status ; i++ ) {
63      c = test_cat_buffer[i];
64      if (isprint(c) || isspace(c)) {
65        if (!is_printable) {
66          printf( "(%d)", count );
67          count = 0;
68          is_printable = 1;
69        }
70        putchar(c);
71      } else {
72        is_printable = 0;
73        count++;
74      }
75    }
76    offset += status;
77  }
78
79  status = close( fd );
80  assert( !status );
81}
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