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tree-wide: mark set-but-not-used variables as unused to make LLVM happy

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LLVM 13 introduced `-Wunused-but-set-variable` diagnostic flag, which
trips over some intentionally set-but-not-used variables or variables
attached to cleanup handlers with side effects (`_cleanup_umask_`,
`_cleanup_(notify_on_cleanup)`, `_cleanup_(restore_sigsetp)`, etc.):

```
../src/basic/process-util.c:1257:46: error: variable 'saved_ssp' set but not used [-Werror,-Wunused-but-set-variable]
        _cleanup_(restore_sigsetp) sigset_t *saved_ssp = NULL;
                                                     ^
                                                     1 error generated.
```
This commit is contained in:
Frantisek Sumsal
2021-09-15 13:09:45 +02:00
parent bd8ea741a4
commit d7ac09520b
33 changed files with 51 additions and 43 deletions
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src/cryptsetup/cryptsetup.c
+1 -1
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@@ -1674,7 +1674,7 @@ static int run(int argc, char *argv[]) {
verb = argv[1];
if (streq(verb, "attach")) {
_cleanup_(remove_and_erasep) const char *destroy_key_file = NULL;
_unused_ _cleanup_(remove_and_erasep) const char *destroy_key_file = NULL;
_cleanup_(erase_and_freep) void *key_data = NULL;
const char *volume, *source, *key_file, *options;
crypt_status_info status;