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, 5 insertions, 5 deletions

diff --git a/src/shared/install.c b/src/shared/install.c
index d33a658d0a..21cb57bc5a 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -1303,7 +1303,7 @@ static int unit_file_search(
         STRV_FOREACH(p, paths->search_path) {
                 _cleanup_free_ char *path = NULL;
 
-                path = strjoin(*p, "/", info->name, NULL);
+                path = strjoin(*p, "/", info->name);
                 if (!path)
                         return -ENOMEM;
 
@@ -1328,7 +1328,7 @@ static int unit_file_search(
                 STRV_FOREACH(p, paths->search_path) {
                         _cleanup_free_ char *path = NULL;
 
-                        path = strjoin(*p, "/", template, NULL);
+                        path = strjoin(*p, "/", template);
                         if (!path)
                                 return -ENOMEM;
 
@@ -1608,7 +1608,7 @@ static int install_info_symlink_wants(
                         continue;
                 }
 
-                path = strjoin(config_path, "/", dst, suffix, n, NULL);
+                path = strjoin(config_path, "/", dst, suffix, n);
                 if (!path)
                         return -ENOMEM;
 
@@ -1642,7 +1642,7 @@ static int install_info_symlink_link(
         if (r > 0)
                 return 0;
 
-        path = strjoin(config_path, "/", i->name, NULL);
+        path = strjoin(config_path, "/", i->name);
         if (!path)
                 return -ENOMEM;
 
@@ -2162,7 +2162,7 @@ int unit_file_revert(
                 STRV_FOREACH(j, fs) {
                         _cleanup_free_ char *t = NULL;
 
-                        t = strjoin(*i, "/", *j, NULL);
+                        t = strjoin(*i, "/", *j);
                         if (!t)
                                 return -ENOMEM;