a6f9cd0 ("tools/rmmod: consistently use ERR logging facility") fixed
the split between syslog and stderr of various error message substrings
by calling the ERR macro instead of writing directly to stderr, but in
doing so also completely mangled the output because the ERR macro
decorates its arguments:
$ rmmod iwlwifi
rmmod: ERROR: Module iwlwifi is in use by:rmmod: ERROR: iwlmvmrmmod: ERROR:
And in syslog:
$ rmmod -s iwlwifi
2025-03-24T17:22:34.878318+01:00 mangolassi rmmod: ERROR: Module iwlwifi is
in use by:
2025-03-24T17:22:34.889145+01:00 mangolassi rmmod: ERROR: iwlmvm
2025-03-24T17:22:34.889224+01:00 mangolassi rmmod: ERROR:
This commit fixes that by building the holder names list with a strbuf
and then passes the whole thing at once to ERR.
Fixes: a6f9cd0 ("tools/rmmod: consistently use ERR logging facility")
Signed-off-by: Yannick Le Pennec <yannick.lepen...@live.fr>
---
tools/rmmod.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/tools/rmmod.c b/tools/rmmod.c
index 962d850..61f2e00 100644
--- a/tools/rmmod.c
+++ b/tools/rmmod.c
@@ -15,6 +15,7 @@
#include <sys/types.h>
#include <shared/macro.h>
+#include <shared/strbuf.h>
#include <libkmod/libkmod.h>
@@ -63,16 +64,18 @@ static int check_module_inuse(struct kmod_module *mod)
holders = kmod_module_get_holders(mod);
if (holders != NULL) {
+ DECLARE_STRBUF_WITH_STACK(buf, 128);
struct kmod_list *itr;
- ERR("Module %s is in use by:", kmod_module_get_name(mod));
-
kmod_list_foreach(itr, holders) {
struct kmod_module *hm = kmod_module_get_module(itr);
- ERR(" %s", kmod_module_get_name(hm));
+ strbuf_pushchar(&buf, ' ');
+ strbuf_pushchars(&buf, kmod_module_get_name(hm));
kmod_module_unref(hm);
}
- ERR("\n");
+
+ ERR("Module %s is in use by:%s\n", kmod_module_get_name(mod),
+ strbuf_str(&buf));
kmod_module_unref_list(holders);
return -EBUSY;
--
2.49.0
