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1 #include <stdio.h>
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2
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3
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4 void writestuff (FILE *f)
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5 {
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6 fprintf (f, "hello world\n");
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7 fputc ('y', f);
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8 putc ('e', f);
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9 }
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10
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11 void readstuff (FILE *f)
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12 {
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13 int c, d;
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14 char stuff[100], *s;
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15 c = fgetc (f);
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16 ungetc (c, f);
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17 d = fgetc (f);
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18 s = fgets (stuff, sizeof(stuff), f);
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19 }
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20
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21 int main ()
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22 {
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23 FILE *f;
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24 writestuff (stdout);
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25 writestuff (stderr);
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26 f = fopen ("/dev/null", "w");
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27 writestuff (f);
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28 fclose (f);
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29 f = fopen ("/dev/zero", "r");
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30 readstuff (f);
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31 f = freopen ("/dev/null", "w", f);
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32 writestuff (f);
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33 fclose (f);
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34
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35 return 0;
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36 }
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