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/* Tests that stdin can be redirected from a normal file. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int
main (void)
{
const char* fname = "freopen.dat";
const char tsttxt[]
= "A random line of text, used to test correct freopen etc.\n";
FILE* instream;
FILE *old_stderr;
char c1;
/* Like the freopen call in flex. */
old_stderr = freopen (fname, "w+", stderr);
if (old_stderr == NULL
|| fwrite (tsttxt, 1, strlen (tsttxt), stderr) != strlen (tsttxt)
|| fclose (stderr) != 0)
{
printf ("fail\n");
exit (1);
}
instream = freopen(fname, "r", stdin);
if (instream == NULL) {
printf("fail\n");
exit(1);
}
c1 = getc(instream);
if (c1 != 'A') {
printf("fail\n");
exit(1);
}
printf ("pass\n");
exit(0);
}
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