4.104.114.84.95
Last change
on this file since 0895bdb was
0895bdb,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/23/98 at 18:57:48
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Added tests in support of the file system infrastructure.
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-
Property mode set to
100644
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File size:
1.6 KB
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1 | /* |
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2 | * A test support function which performs a crude version of |
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3 | * "cat" so you can look at specific parts of a file. |
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4 | * |
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5 | * $Id$ |
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6 | */ |
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7 | |
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8 | #include <stdio.h> |
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9 | |
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10 | #include <sys/types.h> |
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11 | #include <sys/stat.h> |
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12 | #include <fcntl.h> |
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13 | #include <unistd.h> |
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14 | #include <errno.h> |
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15 | #include <string.h> |
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16 | #include <ctype.h> |
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17 | |
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18 | #include <assert.h> |
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19 | |
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20 | /* |
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21 | * test_cat routine |
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22 | */ |
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23 | |
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24 | unsigned char test_cat_buffer[ 1024 ]; |
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25 | |
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26 | void test_cat( |
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27 | char *file, |
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28 | int offset_arg, |
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29 | int length |
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30 | ) |
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31 | { |
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32 | int fd; |
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33 | int status; |
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34 | int is_printable = 0; |
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35 | int my_length; |
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36 | int i; |
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37 | unsigned char c; |
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38 | int count = 0; |
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39 | off_t offset = (off_t)offset_arg; |
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40 | |
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41 | my_length = (length) ? length : sizeof( test_cat_buffer ); |
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42 | assert( my_length <= sizeof( test_cat_buffer ) ); |
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43 | |
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44 | fd = open( file, O_RDONLY ); |
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45 | if ( fd == -1 ) { |
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46 | printf( "test_cat: open( %s ) failed : %s\n", file, strerror( errno ) ); |
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47 | exit( 0 ); |
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48 | } |
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49 | |
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50 | for ( ;; ) { |
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51 | status = lseek( fd, offset, SEEK_SET ); |
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52 | assert( !status ); |
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53 | |
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54 | status = read( fd, test_cat_buffer, sizeof(test_cat_buffer) ); |
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55 | if ( status <= 0 ) { |
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56 | if (!is_printable) |
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57 | printf( "(%d)", count ); |
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58 | puts( "" ); |
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59 | break; |
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60 | } |
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61 | |
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62 | for ( i=0 ; i<status ; i++ ) { |
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63 | c = test_cat_buffer[i]; |
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64 | if (isprint(c) || isspace(c)) { |
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65 | if (!is_printable) { |
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66 | printf( "(%d)", count ); |
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67 | count = 0; |
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68 | is_printable = 1; |
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69 | } |
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70 | putchar(c); |
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71 | } else { |
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72 | is_printable = 0; |
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73 | count++; |
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74 | } |
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75 | } |
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76 | offset += status; |
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77 | } |
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78 | |
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79 | status = close( fd ); |
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80 | assert( !status ); |
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81 | } |
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