1 files changed, 98 insertions, 0 deletions
diff --git a/src/shared/dropin.c b/src/shared/dropin.c
new file mode 100644
index 0000000000..7774236f71
--- /dev/null
+++ b/src/shared/dropin.c
@@ -0,0 +1,98 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Zbigniew Jędrzejewski-Szmek
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "dropin.h"
+#include "util.h"
+#include "mkdir.h"
+#include "fileio-label.h"
+
+int drop_in_file(const char *dir, const char *unit,
+                 const char *name, char **_p, char **_q) {
+
+        _cleanup_free_ char *b = NULL;
+        char *p, *q;
+
+        assert(unit);
+        assert(name);
+        assert(_p);
+        assert(_q);
+
+        b = xescape(name, "/.");
+        if (!b)
+                return -ENOMEM;
+
+        if (!filename_is_safe(b))
+                return -EINVAL;
+
+        p = strjoin(dir, "/", unit, ".d", NULL);
+        if (!p)
+                return -ENOMEM;
+
+        q = strjoin(p, "/90-", b, ".conf", NULL);
+        if (!q) {
+                free(p);
+                return -ENOMEM;
+        }
+
+        *_p = p;
+        *_q = q;
+        return 0;
+}
+
+int write_drop_in(const char *dir, const char *unit,
+                  const char *name, const char *data) {
+
+        _cleanup_free_ char *p = NULL, *q = NULL;
+        int r;
+
+        assert(dir);
+        assert(unit);
+        assert(name);
+        assert(data);
+
+        r = drop_in_file(dir, unit, name, &p, &q);
+        if (r < 0)
+                return r;
+
+        mkdir_p(p, 0755);
+        return write_string_file_atomic_label(q, data);
+}
+
+int write_drop_in_format(const char *dir, const char *unit,
+                         const char *name, const char *format, ...) {
+        _cleanup_free_ char *p = NULL;
+        va_list ap;
+        int r;
+
+        assert(dir);
+        assert(unit);
+        assert(name);
+        assert(format);
+
+        va_start(ap, format);
+        r = vasprintf(&p, format, ap);
+        va_end(ap);
+
+        if (r < 0)
+                return -ENOMEM;
+
+        return write_drop_in(dir, unit, name, p);
+}