tree-wide: drop NULL sentinel from strjoin

This makes strjoin and strjoina more similar and avoids the useless final
argument.

spatch -I . -I ./src -I ./src/basic -I ./src/basic -I ./src/shared -I ./src/shared -I ./src/network -I ./src/locale -I ./src/login -I ./src/journal -I ./src/journal -I ./src/timedate -I ./src/timesync -I ./src/nspawn -I ./src/resolve -I ./src/resolve -I ./src/systemd -I ./src/core -I ./src/core -I ./src/libudev -I ./src/udev -I ./src/udev/net -I ./src/udev -I ./src/libsystemd/sd-bus -I ./src/libsystemd/sd-event -I ./src/libsystemd/sd-login -I ./src/libsystemd/sd-netlink -I ./src/libsystemd/sd-network -I ./src/libsystemd/sd-hwdb -I ./src/libsystemd/sd-device -I ./src/libsystemd/sd-id128 -I ./src/libsystemd-network --sp-file coccinelle/strjoin.cocci --in-place $(git ls-files src/*.c)

git grep -e '\bstrjoin\b.*NULL' -l|xargs sed -i -r 's/strjoin\((.*), NULL\)/strjoin(\1)/'

This might have missed a few cases (spatch has a really hard time dealing
with _cleanup_ macros), but that's no big issue, they can always be fixed
later.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/core/manager.c b/src/core/manager.c
index 0549f5ef1b..fa02389167 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -1196,7 +1196,7 @@ static void manager_build_unit_path_cache(Manager *m) {
                 FOREACH_DIRENT(de, d, r = -errno; goto fail) {
                         char *p;
 
-                        p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
+                        p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name);
                         if (!p) {
                                 r = -ENOMEM;
                                 goto fail;