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, 4 insertions, 4 deletions

diff --git a/src/delta/delta.c b/src/delta/delta.c
index f32744def2..6848662ccb 100644
--- a/src/delta/delta.c
+++ b/src/delta/delta.c
@@ -214,7 +214,7 @@ static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const
 
         assert(!endswith(drop, "/"));
 
-        path = strjoin(toppath, "/", drop, NULL);
+        path = strjoin(toppath, "/", drop);
         if (!path)
                 return -ENOMEM;
 
@@ -242,7 +242,7 @@ static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const
                 if (!endswith(*file, ".conf"))
                         continue;
 
-                p = strjoin(path, "/", *file, NULL);
+                p = strjoin(path, "/", *file);
                 if (!p)
                         return -ENOMEM;
                 d = p + strlen(toppath) + 1;
@@ -330,7 +330,7 @@ static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const ch
                 if (!dirent_is_file(de))
                         continue;
 
-                p = strjoin(path, "/", de->d_name, NULL);
+                p = strjoin(path, "/", de->d_name);
                 if (!p)
                         return -ENOMEM;
 
@@ -383,7 +383,7 @@ static int process_suffix(const char *suffix, const char *onlyprefix) {
         NULSTR_FOREACH(p, prefixes) {
                 _cleanup_free_ char *t = NULL;
 
-                t = strjoin(p, "/", suffix, NULL);
+                t = strjoin(p, "/", suffix);
                 if (!t) {
                         r = -ENOMEM;
                         goto finish;