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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>
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#include <errno.h>
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#include <stdio.h>
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#include <support/check.h>
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#include <sys/types.h>
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#include <wchar.h>
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static wchar_t buf[100];
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static const struct
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{
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size_t n;
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const char *str;
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ssize_t exp;
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} tests[] =
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{
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{ array_length (buf), "hello world", 11 },
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{ 0, "hello world", -1 },
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{ 1, "hello world", -1 },
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{ 2, "hello world", -1 },
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{ 11, "hello world", -1 },
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{ 12, "hello world", 11 },
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{ 0, "", -1 },
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{ array_length (buf), "", 0 }
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};
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static int
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do_test (void)
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{
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size_t n;
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TEST_COMPARE (swprintf (buf, array_length (buf), L"Hello %s", "world"), 11);
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TEST_COMPARE_STRING_WIDE (buf, L"Hello world");
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TEST_COMPARE (swprintf (buf, array_length (buf), L"Is this >%g< 3.1?", 3.1),
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18);
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TEST_COMPARE_STRING_WIDE (buf, L"Is this >3.1< 3.1?");
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for (n = 0; n < array_length (tests); ++n)
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{
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wmemset (buf, 0xabcd, array_length (buf));
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errno = 0;
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ssize_t res = swprintf (buf, tests[n].n, L"%s", tests[n].str);
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if (tests[n].exp < 0 && res >= 0)
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{
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support_record_failure ();
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printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") expected to fail\n",
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tests[n].n, tests[n].str);
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}
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else if (tests[n].exp >= 0 && tests[n].exp != res)
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{
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support_record_failure ();
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printf ("\
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swprintf (buf, %zu, L\"%%s\", \"%s\") expected to return %zd, but got %zd\n",
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tests[n].n, tests[n].str, tests[n].exp, res);
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}
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else if (res < 0
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&& tests[n].n > 0
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&& wcsnlen (buf, array_length (buf)) == array_length (buf))
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{
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support_record_failure ();
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printf ("\
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error: swprintf (buf, %zu, L\"%%s\", \"%s\") missing null terminator\n",
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tests[n].n, tests[n].str);
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}
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else if (res < 0
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&& tests[n].n > 0
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&& wcsnlen (buf, array_length (buf)) < array_length (buf)
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&& buf[wcsnlen (buf, array_length (buf)) + 1] != 0xabcd)
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{
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support_record_failure ();
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printf ("\
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error: swprintf (buf, %zu, L\"%%s\", \"%s\") out of bounds write\n",
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tests[n].n, tests[n].str);
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}
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if (res < 0 && tests[n].n < 0)
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TEST_COMPARE (errno, E2BIG);
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printf ("swprintf (buf, %zu, L\"%%s\", \"%s\") OK\n",
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tests[n].n, tests[n].str);
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}
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TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0s", "foo"), 0);
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TEST_COMPARE_STRING_WIDE (buf, L"");
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TEST_COMPARE (swprintf (buf, array_length (buf), L"%.0ls", L"foo"), 0);
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TEST_COMPARE_STRING_WIDE (buf, L"");
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return 0;
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}
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#include <support/test-driver.c>
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