mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 06:10:06 +00:00
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/* Test the sprintf (buf, "%s", buf) does not override buf.
|
|
Copyright (C) 2019-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <support/check.h>
|
|
|
|
enum
|
|
{
|
|
FUNCTION_FIRST,
|
|
FUNCTION_SPRINTF = FUNCTION_FIRST,
|
|
FUNCTION_SNPRINF,
|
|
FUNCTION_VSPRINTF,
|
|
FUNCTION_VSNPRINTF,
|
|
FUNCTION_LAST
|
|
};
|
|
|
|
static void
|
|
do_one_test (int function, char *buf, ...)
|
|
{
|
|
va_list args;
|
|
char *arg;
|
|
|
|
/* Expected results for fortified and non-fortified sprintf. */
|
|
#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 1
|
|
const char *expected = "CD";
|
|
#else
|
|
const char *expected = "ABCD";
|
|
#endif
|
|
|
|
va_start (args, buf);
|
|
arg = va_arg (args, char *);
|
|
va_end (args);
|
|
|
|
switch (function)
|
|
{
|
|
/* The regular sprintf and vsprintf functions do not override the
|
|
destination buffer, even if source and destination overlap. */
|
|
case FUNCTION_SPRINTF:
|
|
sprintf (buf, "%sCD", buf);
|
|
TEST_COMPARE_STRING (buf, expected);
|
|
break;
|
|
case FUNCTION_VSPRINTF:
|
|
va_start (args, buf);
|
|
vsprintf (arg, "%sCD", args);
|
|
TEST_COMPARE_STRING (arg, expected);
|
|
va_end (args);
|
|
break;
|
|
/* On the other hand, snprint and vsnprint override overlapping
|
|
source and destination buffers. */
|
|
case FUNCTION_SNPRINF:
|
|
snprintf (buf, 3, "%sCD", buf);
|
|
TEST_COMPARE_STRING (buf, "CD");
|
|
break;
|
|
case FUNCTION_VSNPRINTF:
|
|
va_start (args, buf);
|
|
vsnprintf (arg, 3, "%sCD", args);
|
|
TEST_COMPARE_STRING (arg, "CD");
|
|
va_end (args);
|
|
break;
|
|
default:
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char buf[8];
|
|
int i;
|
|
|
|
/* For each function in the enum do:
|
|
- reset the buffer to the initial state "AB";
|
|
- call the function with buffer as source and destination;
|
|
- check for the desired behavior. */
|
|
for (i = FUNCTION_FIRST; i < FUNCTION_LAST; i++)
|
|
{
|
|
strncpy (buf, "AB", 3);
|
|
do_one_test (i, buf, buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|