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Diffstat (limited to 'string/tst-strlcpy.c')
-rw-r--r-- | string/tst-strlcpy.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/string/tst-strlcpy.c b/string/tst-strlcpy.c new file mode 100644 index 0000000000..0063c43f5c --- /dev/null +++ b/string/tst-strlcpy.c @@ -0,0 +1,68 @@ +/* Test the strlcpy function. + Copyright (C) 2023 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 <string.h> +#include <stdlib.h> +#include <stdio.h> +#include <support/check.h> + +static int +do_test (void) +{ + struct { + char buf1[16]; + char buf2[16]; + } s; + + /* Nothing is written to the destination if its size is 0. */ + memset (&s, '@', sizeof (s)); + TEST_COMPARE (strlcpy (s.buf1, "Hello!", 0), 6); + TEST_COMPARE_BLOB (&s, sizeof (s), "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 32); + + /* No bytes are are modified in the target buffer if the source + string is short enough. */ + memset (&s, '@', sizeof (s)); + TEST_COMPARE (strlcpy (s.buf1, "Hello!", sizeof (s.buf1)), 6); + TEST_COMPARE_BLOB (&s, sizeof (s), "Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32); + + /* A source string which fits exactly into the destination buffer is + not truncated. */ + memset (&s, '@', sizeof (s)); + TEST_COMPARE (strlcpy (s.buf1, "Hello, world!!!", sizeof (s.buf1)), 15); + TEST_COMPARE_BLOB (&s, sizeof (s), + "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32); + + /* A source string one character longer than the destination buffer + is truncated by one character. The untruncated source length is + returned. */ + memset (&s, '@', sizeof (s)); + TEST_COMPARE (strlcpy (s.buf1, "Hello, world!!!!", sizeof (s.buf1)), 16); + TEST_COMPARE_BLOB (&s, sizeof (s), + "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32); + + /* An even longer source string is truncated as well, and the + original length is returned. */ + memset (&s, '@', sizeof (s)); + TEST_COMPARE (strlcpy (s.buf1, "Hello, world!!!!!!!!", sizeof (s.buf1)), 20); + TEST_COMPARE_BLOB (&s, sizeof (s), + "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32); + + return 0; +} + +#include <support/test-driver.c> |