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test-container: Use nftw instead of rm -rf

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If the binary to run is 'env', test-containers skips it and adds
any required environment variable on the process envs variables.
This simplifies the required code to spawn new process (no need
to build an env-like program).

However, this is an issue for recursive_remove if there is any
LD_PRELOAD, since test-container will not prepend the loader command
along with required paths.  If the required preloaded library can
not be loaded by the system glibc, the 'post-clean rsync' will
eventually fail.

One example is if system glibc does not support DT_RELR and the
built glibc does, the nss/tst-nss-gai-hv2-canonname test fails
with:

../scripts/evaluate-test.sh nss/tst-nss-gai-hv2-canonname $? false false
86_64-linux-gnu/nss/tst-nss-gai-hv2-canonname.test-result
rm: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_ABI_DT_RELR' not
found (required by x86_64-linux-gnu/malloc/libc_malloc_debug.so)

Instead trying to figure out the required loader arguments on how
to spawn the 'rm -rf', replace the command with a nftw call.

Checked on x86_64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
This commit is contained in:
Adhemerval Zanella 2023-09-27 16:20:13 -03:00
parent 29d4591b07
commit aea4ddb871
1 changed files with 11 additions and 23 deletions
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34
support/test-container.c
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@ -37,6 +37,7 @@
#include <errno.h>
#include <error.h>
#include <libc-pointer-arith.h>
#include <ftw.h>
#ifdef __linux__
#include <sys/mount.h>
@ -405,32 +406,19 @@ file_exists (char *path)
return 0;
}
static int
unlink_cb (const char *fpath, const struct stat *sb, int typeflag,
struct FTW *ftwbuf)
{
return remove (fpath);
}
static void
recursive_remove (char *path)
{
pid_t child;
int status;
child = fork ();
switch (child) {
case -1:
perror("fork");
FAIL_EXIT1 ("Unable to fork");
case 0:
/* Child. */
execlp ("rm", "rm", "-rf", path, NULL);
FAIL_EXIT1 ("exec rm: %m");
default:
/* Parent. */
waitpid (child, &status, 0);
/* "rm" would have already printed a suitable error message. */
if (! WIFEXITED (status)
|| WEXITSTATUS (status) != 0)
FAIL_EXIT1 ("exec child returned status: %d", status);
break;
}
int r = nftw (path, unlink_cb, 1000, FTW_DEPTH | FTW_PHYS);
if (r == -1)
FAIL_EXIT1 ("recursive_remove failed");
}
/* Used for both rsync and the mytest.script "cp" command. */