| 1 | #include <stdio.h> |
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| 2 | #include <stdlib.h> |
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| 3 | #include <string.h> |
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| 4 | #define TESTFILE "conftest.tmp" |
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| 5 | int |
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| 6 | main (void) |
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| 7 | { |
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| 8 | FILE *fp; |
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| 9 | |
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| 10 | /* Create a file with some contents. */ |
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| 11 | fp = fopen (TESTFILE, "w"); |
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| 12 | if (fp == NULL) |
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| 13 | return 70; |
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| 14 | if (fwrite ("foogarsh", 1, 8, fp) < 8) |
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| 15 | { fclose (fp); return 71; } |
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| 16 | if (fclose (fp)) |
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| 17 | return 72; |
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| 18 | |
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| 19 | /* The file's contents is now "foogarsh". */ |
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| 20 | |
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| 21 | /* Try writing after reading to EOF. */ |
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| 22 | fp = fopen (TESTFILE, "r+"); |
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| 23 | if (fp == NULL) |
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| 24 | return 73; |
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| 25 | if (fseek (fp, -1, SEEK_END)) |
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| 26 | { fclose (fp); return 74; } |
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| 27 | if (!(getc (fp) == 'h')) |
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| 28 | { fclose (fp); return 1; } |
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| 29 | if (!(getc (fp) == EOF)) |
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| 30 | { fclose (fp); return 2; } |
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| 31 | if (!(ftell (fp) == 8)) |
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| 32 | { fclose (fp); return 3; } |
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| 33 | if (!(ftell (fp) == 8)) |
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| 34 | { fclose (fp); return 4; } |
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| 35 | if (!(putc ('!', fp) == '!')) |
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| 36 | { fclose (fp); return 5; } |
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| 37 | if (!(ftell (fp) == 9)) |
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| 38 | { fclose (fp); return 6; } |
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| 39 | if (!(fclose (fp) == 0)) |
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| 40 | return 7; |
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| 41 | fp = fopen (TESTFILE, "r"); |
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| 42 | if (fp == NULL) |
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| 43 | return 75; |
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| 44 | { |
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| 45 | char buf[10]; |
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| 46 | if (!(fread (buf, 1, 10, fp) == 9)) |
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| 47 | { fclose (fp); return 10; } |
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| 48 | if (!(memcmp (buf, "foogarsh!", 9) == 0)) |
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| 49 | { fclose (fp); return 11; } |
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| 50 | } |
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| 51 | if (!(fclose (fp) == 0)) |
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| 52 | return 12; |
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| 53 | |
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| 54 | /* The file's contents is now "foogarsh!". */ |
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| 55 | |
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| 56 | return 0; |
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| 57 | } |
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