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/core/timer.c b/src/core/timer.c
index 2469a517ea..c6b28dd9c5 100644
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -147,7 +147,7 @@ static int timer_setup_persistent(Timer *t) {
 
                 e = getenv("XDG_DATA_HOME");
                 if (e)
-                        t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id, NULL);
+                        t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id);
                 else {
 
                         _cleanup_free_ char *h = NULL;
@@ -156,7 +156,7 @@ static int timer_setup_persistent(Timer *t) {
                         if (r < 0)
                                 return log_unit_error_errno(UNIT(t), r, "Failed to determine home directory: %m");
 
-                        t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id, NULL);
+                        t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id);
                 }
         }