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/shared/fstab-util.c b/src/shared/fstab-util.c
index a4e0cd3267..f0bfb30bb5 100644
--- a/src/shared/fstab-util.c
+++ b/src/shared/fstab-util.c
@@ -241,7 +241,7 @@ static char *tag_to_udev_node(const char *tagvalue, const char *by) {
         if (encode_devnode_name(u, t, enc_len) < 0)
                 return NULL;
 
-        return strjoin("/dev/disk/by-", by, "/", t, NULL);
+        return strjoin("/dev/disk/by-", by, "/", t);
 }
 
 char *fstab_node_to_udev_node(const char *p) {