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, 2 insertions, 2 deletions

diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
index bb90c89cc2..3b8768b9a7 100644
--- a/src/shared/bus-util.c
+++ b/src/shared/bus-util.c
@@ -676,7 +676,7 @@ int bus_connect_user_systemd(sd_bus **_bus) {
         if (r < 0)
                 return r;
 
-        bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);
+        bus->address = strjoin("unix:path=", ee, "/systemd/private");
         if (!bus->address)
                 return -ENOMEM;
 
@@ -1460,7 +1460,7 @@ int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id,
         if (!external_label)
                 return -ENOMEM;
 
-        p = strjoin(prefix, "/", sender_label, "/", external_label, NULL);
+        p = strjoin(prefix, "/", sender_label, "/", external_label);
         if (!p)
                 return -ENOMEM;