Merge pull request #1515 from poettering/install-symlink

install: follow unit file symlinks in /usr, but not /etc when looking for [Install] data and more

2 files changed, 21 insertions, 0 deletions

diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
index cddd4232fc..2b6189ad90 100644
--- a/src/basic/fs-util.c
+++ b/src/basic/fs-util.c
@@ -233,6 +233,26 @@ int readlink_and_canonicalize(const char *p, char **r) {
         return 0;
 }
 
+int readlink_and_make_absolute_root(const char *root, const char *path, char **ret) {
+        _cleanup_free_ char *target = NULL, *t = NULL;
+        const char *full;
+        int r;
+
+        full = prefix_roota(root, path);
+        r = readlink_malloc(full, &target);
+        if (r < 0)
+                return r;
+
+        t = file_in_same_dir(path, target);
+        if (!t)
+                return -ENOMEM;
+
+        *ret = t;
+        t = NULL;
+
+        return 0;
+}
+
 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
         assert(path);
 
diff --git a/src/basic/fs-util.h b/src/basic/fs-util.h
index b94873e65b..902c7e295b 100644
--- a/src/basic/fs-util.h
+++ b/src/basic/fs-util.h
@@ -40,6 +40,7 @@ int readlink_malloc(const char *p, char **r);
 int readlink_value(const char *p, char **ret);
 int readlink_and_make_absolute(const char *p, char **r);
 int readlink_and_canonicalize(const char *p, char **r);
+int readlink_and_make_absolute_root(const char *root, const char *path, char **ret);
 
 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);