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/elogind -I ./src/core -I ./src/core -I ./src/libudev -I ./src/udev -I ./src/udev/net -I ./src/udev -I ./src/libelogind/sd-bus -I ./src/libelogind/sd-event -I ./src/libelogind/sd-login -I ./src/libelogind/sd-netlink -I ./src/libelogind/sd-network -I ./src/libelogind/sd-hwdb -I ./src/libelogind/sd-device -I ./src/libelogind/sd-id128 -I ./src/libelogind-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.

2 files changed, 4 insertions, 4 deletions

diff --git a/src/libelogind/sd-bus/bus-kernel.c b/src/libelogind/sd-bus/bus-kernel.c
index 5db011b71..4fa06b75e 100644
--- a/src/libelogind/sd-bus/bus-kernel.c
+++ b/src/libelogind/sd-bus/bus-kernel.c
@@ -1650,7 +1650,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         if (s) {
                 char *p;
 
-                p = strjoin("/sys/fs/kdbus/", n->str, "/bus", NULL);
+                p = strjoin("/sys/fs/kdbus/", n->str, "/bus");
                 if (!p) {
                         safe_close(fd);
                         return -ENOMEM;
diff --git a/src/libelogind/sd-bus/sd-bus.c b/src/libelogind/sd-bus/sd-bus.c
index 3c6b210bd..4173ecde6 100644
--- a/src/libelogind/sd-bus/sd-bus.c
+++ b/src/libelogind/sd-bus/sd-bus.c
@@ -1355,7 +1355,7 @@ int bus_set_address_system_remote(sd_bus *b, const char *host) {
                         return -ENOMEM;
         }
 
-        b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL);
+        b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c);
         if (!b->address)
                 return -ENOMEM;
 
@@ -1403,7 +1403,7 @@ int bus_set_address_system_machine(sd_bus *b, const char *machine) {
         if (!e)
                 return -ENOMEM;
 
-        b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
+        b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e);
         if (!b->address)
                 return -ENOMEM;
 
@@ -3511,7 +3511,7 @@ _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, cha
         if (!e)
                 return -ENOMEM;
 
-        ret = strjoin(prefix, "/", e, NULL);
+        ret = strjoin(prefix, "/", e);
         if (!ret)
                 return -ENOMEM;