mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 06:10:10 +00:00
118816de33
Always null-terminate the buffer and set E2BIG if the buffer is too small. This fixes bug 27857. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
#include <array_length.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <support/check.h>
|
|
#include <sys/types.h>
|
|
#include <wchar.h>
|
|
|
|
|
|
static wchar_t buf[100];
|
|
static const struct
|
|
{
|
|
size_t n;
|
|
const char *str;
|
|
ssize_t exp;
|
|
} tests[] =
|
|
{
|
|
{ array_length (buf), "hello world", 11 },
|
|
{ 0, "hello world", -1 },
|
|
{ 1, "hello world", -1 },
|
|
{ 2, "hello world", -1 },
|
|
{ 11, "hello world", -1 },
|
|
{ 12, "hello world", 11 },
|
|
{ 0, "", -1 },
|
|
{ array_length (buf), "", 0 }
|
|
};
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
size_t n;
|
|
|
|
TEST_COMPARE (swprintf (buf, array_length (buf), L"Hello %s", "world"), 11);
|
|
TEST_COMPARE_STRING_WIDE (buf, L"Hello world");
|
|
|
|
TEST_COMPARE (swprintf (buf, array_length (buf), L"Is this >%g< 3.1?", 3.1),
|
|
18);
|
|
TEST_COMPARE_STRING_WIDE (buf, L"Is this >3.1< 3.1?");
|
|
|
|
for (n = 0; n < array_length (tests); ++n)
|
|
{
|
|
wmemset (buf, 0xabcd, array_length (buf));
|
|
errno = 0;
|
|
ssize_t res = swprintf (buf, tests[n].n, L"%s", tests[n].str);
|
|
|
|
if (tests[n].exp < 0 && res >= 0)
|
|
{
|
|
support_record_failure ();
|
|
printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") expected to fail\n",
|
|
tests[n].n, tests[n].str);
|
|
}
|
|
else if (tests[n].exp >= 0 && tests[n].exp != res)
|
|
{
|
|
support_record_failure ();
|
|
printf ("\
|
|
swprintf (buf, %zu, L\"%%s\", \"%s\") expected to return %zd, but got %zd\n",
|
|
tests[n].n, tests[n].str, tests[n].exp, res);
|
|
}
|
|
else if (res < 0
|
|
&& tests[n].n > 0
|
|
&& wcsnlen (buf, array_length (buf)) == array_length (buf))
|
|
{
|
|
support_record_failure ();
|
|
printf ("\
|
|
error: swprintf (buf, %zu, L\"%%s\", \"%s\") missing null terminator\n",
|
|
tests[n].n, tests[n].str);
|
|
}
|
|
else if (res < 0
|
|
&& tests[n].n > 0
|
|
&& wcsnlen (buf, array_length (buf)) < array_length (buf)
|
|
&& buf[wcsnlen (buf, array_length (buf)) + 1] != 0xabcd)
|
|
{
|
|
support_record_failure ();
|
|
printf ("\
|
|
error: swprintf (buf, %zu, L\"%%s\", \"%s\") out of bounds write\n",
|
|
tests[n].n, tests[n].str);
|
|
}
|
|
|
|
if (res < 0 && tests[n].n < 0)
|
|
TEST_COMPARE (errno, E2BIG);
|
|
|
|
printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") OK\n",
|
|
tests[n].n, tests[n].str);
|
|
}
|
|
|
|
TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0s", "foo"), 0);
|
|
TEST_COMPARE_STRING_WIDE (buf, L"");
|
|
|
|
TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0ls", L"foo"), 0);
|
|
TEST_COMPARE_STRING_WIDE (buf, L"");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|