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elf: Fix wrong fscanf usage on tst-pldd

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The fix done b2cd93fce6 does not really
work since macro strification does not expand the sizeof nor the
arithmetic operation.

Checked on x86_64-linux-gnu.
This commit is contained in:
Adhemerval Zanella 2022-07-05 12:58:40 -03:00
parent d0fa09a770
commit c353689e49
1 changed files with 5 additions and 4 deletions
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9
elf/tst-pldd.c
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@ -108,15 +108,16 @@ do_test (void)
loader and libc. */
{
pid_t pid;
char buffer[512];
#define STRINPUT(size) "%" # size "s"
#define BUFFERLEN 511
char buffer[BUFFERLEN + 1];
#define STRINPUT(size) XSTRINPUT(size)
#define XSTRINPUT(size) "%" # size "s"
FILE *out = fmemopen (pldd.out.buffer, pldd.out.length, "r");
TEST_VERIFY (out != NULL);
/* First line is in the form of <pid>: <full path of executable> */
TEST_COMPARE (fscanf (out, "%u: " STRINPUT (sizeof (buffer) - 1), &pid,
buffer), 2);
TEST_COMPARE (fscanf (out, "%u: " STRINPUT (BUFFERLEN), &pid, buffer), 2);
TEST_COMPARE (pid, *target_pid_ptr);
TEST_COMPARE (strcmp (basename (buffer), "tst-pldd"), 0);