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glibc/libio/bug-rewind.c
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#include <stdio.h> | |
#include <wchar.h> | |
#define PASSED 0 | |
#define FAILED 3 | |
static int fd; | |
static void prepare (void); | |
#define PREPARE(argc, argv) prepare () | |
#define TEST_FUNCTION do_test () | |
static int do_test (void); | |
#include "../test-skeleton.c" | |
static void | |
prepare (void) | |
{ | |
fd = create_temp_file ("wrewind.", NULL); | |
if (fd == -1) | |
exit (3); | |
} | |
static int | |
do_test (void) | |
{ | |
FILE *fptr; | |
char arg1; | |
char arg2; | |
int ret1, ret2, result, num; | |
ret1 = 0; | |
ret2 = 0; | |
fptr = fdopen (fd, "w+"); | |
if (fptr == NULL) | |
{ | |
printf ("Unable to open file.\n"); | |
return 1; | |
} | |
if (fwprintf (fptr, L"cderf") <= 0) | |
{ | |
printf ("Unable to write to file with fwprintf().\n"); | |
fclose (fptr); | |
return 2; | |
} | |
rewind (fptr); | |
ret1 = fwscanf (fptr, L"%c%c", &arg1, &arg2); | |
if (ret1 != 2) | |
{ | |
printf ("first fwscanf returned %d, expected 2\n", ret1); | |
return 3; | |
} | |
rewind (fptr); | |
ret2 = fwscanf (fptr, L"%c%n%c", &arg1, &num, &arg2); | |
if (ret2 != 2) | |
{ | |
printf ("second fwscanf returned %d, expected 2\n", ret2); | |
return 4; | |
} | |
if (arg2 != 'd') | |
{ | |
result = FAILED; | |
printf ("rewind after first fwscanf failed\n"); | |
} | |
else | |
{ | |
printf ("Passed\n"); | |
result = PASSED; | |
} | |
fclose (fptr); | |
return result; | |
} |