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Bug #1416 » d.c

corecode, 07/10/2009 08:51 AM

 
#include <stdio.h>

int
main(void)
{
FILE *f = fopen("duptmp", "w");
FILE *f1, *f2;
char line[100];

if (f == NULL)
return (1);

fputs("1\n2\n3\n", f);
fclose(f);

f1 = fopen("duptmp", "r");
if (f1 == NULL)
return (1);
f2 = fdopen(dup(fileno(f1)), "r");
if (f2 == NULL)
return (2);
fgets(line, sizeof(line), f1);
printf("read1: %s", line);
fgets(line, sizeof(line), f2);
printf("read2: %s", line);
return (0);
}
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