1 /* Check that basic freopen functionality works. */
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6
7 int
main(void)8 main (void)
9 {
10 FILE *old_stderr;
11 FILE *f;
12 const char fname[] = "sk1test.dat";
13 const char tsttxt[]
14 = "A random line of text, used to test correct freopen etc.\n";
15 char buf[sizeof tsttxt] = "";
16
17 /* Like the freopen call in flex. */
18 old_stderr = freopen (fname, "w+", stderr);
19 if (old_stderr == NULL
20 || fwrite (tsttxt, 1, strlen (tsttxt), stderr) != strlen (tsttxt)
21 || fclose (stderr) != 0)
22 {
23 printf ("fail\n");
24 exit (1);
25 }
26
27 /* Using "rb" to make this test similar to the use in genconf.c in
28 GhostScript. */
29 f = fopen (fname, "rb");
30 if (f == NULL
31 || fseek (f, 0L, SEEK_END) != 0
32 || ftell (f) != strlen (tsttxt))
33 {
34 printf ("fail\n");
35 exit (1);
36 }
37
38 rewind (f);
39 if (fread (buf, 1, strlen (tsttxt), f) != strlen (tsttxt)
40 || strcmp (buf, tsttxt) != 0
41 || fclose (f) != 0)
42 {
43 printf ("fail\n");
44 exit (1);
45 }
46
47 printf ("pass\n");
48 exit (0);
49 }
50