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/*------------------------------------------------------------------
* test_snprintf_s
* File 'snprintf_s.c'
* Lines executed:100.00% of 5
*
*------------------------------------------------------------------
*/
#include "test_private.h"
#include "safe_str_lib.h"
#if defined(TEST_MSVCRT) && defined(HAVE_SNPRINTF_S)
#ifdef SAFECLIB_HAVE_C99
#undef snprintf_s
EXTERN int snprintf_s(char *restrict dest, rsize_t dmax,
const char *restrict fmt, ...);
#endif
#endif
//#ifdef HAVE_SNPRINTF_S
//#define HAVE_NATIVE 1
//#else
//#define HAVE_NATIVE 0
//#endif
#include "test_msvcrt.h"
#define LEN (128)
static char str1[LEN];
static char str2[LEN];
int test_snprintf_s(void);
int test_snprintf_s(void) {
errno_t rc;
int ind;
int len2;
int len3;
int errs = 0;
/*--------------------------------------------------*/
#ifndef HAVE_CT_BOS_OVR
EXPECT_BOS("empty dest")
rc = snprintf_s(NULL, LEN, "%s", str2);
NEGERR(ESNULLP)
/* not even with dmax=0, use sprintf_s then */
EXPECT_BOS("empty dest") EXPECT_BOS("empty dest or dmax")
rc = snprintf_s(NULL, 0, "%s", str2);
NEGERR(ESNULLP)
strcpy(str1, "123456");
EXPECT_BOS("empty dest or dmax")
rc = snprintf_s(str1, 0, "%s", str2);
NEGERR(ESZEROL)
EXPECT_BOS("empty fmt")
rc = snprintf_s(str1, LEN, NULL);
NEGERR(ESNULLP)
EXPECT_BOS("dest overflow")
rc = snprintf_s(str1, RSIZE_MAX_STR + 1, "%s", str2);
NEGERR(ESLEMAX)
/* only with c99 __VA_ARGS__ we can pass destbos */
#ifdef SAFECLIB_HAVE_C99
if (_BOS_KNOWN(str1)) {
EXPECT_BOS("dest overflow")
rc = snprintf_s(str1, LEN + 1, "%s", str2);
NEGERR(EOVERFLOW); /* dmax exceeds dest */
CHECK_SLACK(str1, LEN); /* cleared */
}
#endif
#endif
/*--------------------------------------------------*/
str2[0] = '\0';
rc = snprintf_s(str1, LEN, "%s %n", str2, &ind);
NEGERR(EINVAL)
rc = snprintf_s(str1, LEN, "%s %%n", str2);
ERR(3)
rc = snprintf_s(str1, LEN, "%%n");
ERR(2);
/*--------------------------------------------------*/
rc = snprintf_s(str1, LEN, "%p", (char*)NULL); // %p NULL is allowed
NOERR();
/*--------------------------------------------------*/
strcpy(str1, "123456");
strcpy(str2, "keep it simple");
// note: compare to the insecure variant
rc = snprintf(str1, 1, "%s", str2);
/* number of characters (not including the terminating NUL character)
which would have been written to buffer if dmax was ignored */
#if !defined(HAVE_MINGW32) || defined(HAVE_MINGW64)
ERR(14); /* but truncated, written only 1 */
EXPSTR(str1, "");
if ((ind = memcmp(str1, "\00023456\000", 7))) {
debug_printf("%s %u snprintf truncation: %d \"\\x%x%s\"\n",
__FUNCTION__, __LINE__, ind, str1[0], &str1[1]);
errs++;
}
#else
ERR(-1);
/* EXPSTR(str1, "k23456"); */ /* oops, insecure */
#endif
strcpy(str1, "123456");
rc = snprintf_s(str1, 1, "%s", str2);
/* number of characters not including the terminating null
* character (which is always written as long as buffer is not a
* null pointer and bufsz is not zero and not greater than
* RSIZE_MAX), which would have been written to buffer if bufsz
* was ignored. */
#if !defined(HAVE_MINGW32) || defined(HAVE_MINGW64)
ERR(-ESNOSPC);
#else
ERR(-1);
#endif
EXPSTR(str1, ""); /* at least we are secure */
if ((ind = memcmp(str1, "\00023456\000", 7))) {
debug_printf("%s %u snprintf_s truncation: %d \"\\x%x%s\"\n",
__FUNCTION__, __LINE__, ind, str1[0], &str1[1]);
errs++;
}
/*--------------------------------------------------*/
strcpy(str1, "123456");
strcpy(str2, "keep it simple");
// compare to the insecure variant
rc = snprintf(str1, 2, "%s", str2);
#if !defined(HAVE_MINGW32) || defined(HAVE_MINGW64)
ERR(14); /* but truncated, written only 2: k\0 */
EXPSTR(str1, "k")
if ((ind = memcmp(str1, "k\0003456\000", 7))) {
debug_printf("%s %u snprintf truncation: %d \"%s\"\n", __FUNCTION__,
__LINE__, ind, str1);
errs++;
}
#else
ERR(-1);
/* mingw is entirely insecure => "ke3456" */
#endif
strcpy(str1, "123456");
rc = snprintf_s(str1, 2, "%s", str2);
ERR(-ESNOSPC);
EXPSTR(str1, "")
/*--------------------------------------------------*/
strcpy(str1, "aaaaaaaaaa");
strcpy(str2, "keep it simple");
len2 = strlen(str2);
rc = snprintf_s(str1, 50, "%s", str2);
ERR(len2)
len3 = strlen(str1);
if (len3 != len2) {
#ifdef DEBUG
int len1 = strlen(str1);
debug_printf("%s %u lengths wrong: %d %u %u \n", __FUNCTION__,
__LINE__, len1, len2, len3);
#endif
errs++;
}
/*--------------------------------------------------*/
str1[0] = '\0';
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, 5, "%s", str2);
ERR(-ESNOSPC);
EXPSTR(str1, "")
/*--------------------------------------------------*/
str1[0] = '\0';
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, 2, "%s", str2);
ERR(-ESNOSPC);
EXPSTR(str1, "")
/*--------------------------------------------------*/
str1[0] = '\0';
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, 20, "%s", str2);
NOERRNULL()
EXPSTR(str1, str2)
/*--------------------------------------------------*/
str1[0] = '\0';
str2[0] = '\0';
rc = snprintf_s(str1, LEN, "%s", str2);
ERR(0)
EXPNULL(str1)
strcpy(str1, "qqweqq");
rc = snprintf_s(str1, LEN, "%s", "");
ERR(0)
EXPNULL(str1)
/*--------------------------------------------------*/
str1[0] = '\0';
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, LEN, "%s", str2);
NOERRNULL()
EXPSTR(str1, str2)
/*--------------------------------------------------*/
strcpy(str1, "qqweqq");
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, LEN, "%s", str2);
NOERRNULL()
EXPSTR(str1, str2)
/*--------------------------------------------------*/
strcpy(str1, "1234");
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, 12, "%s", str2);
ERR(-ESNOSPC);
EXPSTR(str1, "")
/*--------------------------------------------------*/
strcpy(str1, "1234");
strcpy(str2, "keep it simple");
rc = snprintf_s(str1, 52, "%s", str2);
NOERRNULL()
EXPSTR(str1, str2)
/*--------------------------------------------------*/
strcpy(str1, "12345678901234567890");
rc = snprintf_s(str1, 8, "%s", &str1[7]);
ERR(-ESNOSPC);
EXPSTR(str1, "")
/*--------------------------------------------------*/
strcpy(str1, "123456789");
rc = snprintf_s(str1, 9, "%s", &str1[8]);
ERR(1) /* overlapping allowed */
EXPSTR(str1, "9")
/*--------------------------------------------------*/
strcpy(str2, "123");
strcpy(str1, "keep it simple");
rc = snprintf_s(str2, 31, "%s", &str1[0]);
NOERRNULL()
EXPSTR(str2, "keep it simple")
/*--------------------------------------------------*/
strcpy(str2, "1234");
strcpy(str1, "56789");
rc = snprintf_s(str2, 10, "%s", str1);
NOERRNULL()
EXPSTR(str2, "56789")
/*--------------------------------------------------*/
return (errs);
}
#ifndef __KERNEL__
/* simple hack to get this to work for both userspace and Linux kernel,
until a better solution can be created. */
int main(void) { return (test_snprintf_s()); }
#endif
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