util: replace qemu_get_local_state_pathname()

Simplify the function to only return the directory path. Callers are
adjusted to use the GLib function to build paths, g_build_filename().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220420132624.2439741-39-marcandre.lureau@redhat.com>

include/qemu/osdep.h

@@ -556,16 +556,13 @@ void qemu_set_cloexec(int fd);
 void fips_set_state(bool requested);
 bool fips_get_state(void);
 
-/* Return a dynamically allocated pathname denoting a file or directory that is
- * appropriate for storing local state.
- *
- * @relative_pathname need not start with a directory separator; one will be
- * added automatically.
+/* Return a dynamically allocated directory path that is appropriate for storing
+ * local state.
  *
  * The caller is responsible for releasing the value returned with g_free()
  * after use.
  */
-char *qemu_get_local_state_pathname(const char *relative_pathname);
+char *qemu_get_local_state_dir(void);
 
 /* Find program directory, and save it for later usage with
  * qemu_get_exec_dir().

qga/main.c

@@ -129,12 +129,12 @@ static void stop_agent(GAState *s, bool requested);
 static void
 init_dfl_pathnames(void)
 {
+    g_autofree char *state = qemu_get_local_state_dir();
+
     g_assert(dfl_pathnames.state_dir == NULL);
     g_assert(dfl_pathnames.pidfile == NULL);
-    dfl_pathnames.state_dir = qemu_get_local_state_pathname(
-      QGA_STATE_RELATIVE_DIR);
-    dfl_pathnames.pidfile   = qemu_get_local_state_pathname(
-      QGA_STATE_RELATIVE_DIR G_DIR_SEPARATOR_S "qemu-ga.pid");
+    dfl_pathnames.state_dir = g_build_filename(state, QGA_STATE_RELATIVE_DIR, NULL);
+    dfl_pathnames.pidfile = g_build_filename(state, QGA_STATE_RELATIVE_DIR, "qemu-ga.pid", NULL);
 }
 
 static void quit_handler(int sig)

scsi/qemu-pr-helper.c

@@ -77,8 +77,10 @@ static int gid = -1;
 
 static void compute_default_paths(void)
 {
-    socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock");
-    pidfile = qemu_get_local_state_pathname("run/qemu-pr-helper.pid");
+    g_autofree char *state = qemu_get_local_state_dir();
+
+    socket_path = g_build_filename(state, "run", "qemu-pr-helper.sock", NULL);
+    pidfile = g_build_filename(state, "run", "qemu-pr-helper.pid", NULL);
 }
 
 static void usage(const char *name)

tools/virtiofsd/fuse_virtio.c

@@ -901,10 +901,12 @@ static bool fv_socket_lock(struct fuse_session *se)
 {
     g_autofree gchar *sk_name = NULL;
     g_autofree gchar *pidfile = NULL;
+    g_autofree gchar *state = NULL;
     g_autofree gchar *dir = NULL;
     Error *local_err = NULL;
 
-    dir = qemu_get_local_state_pathname("run/virtiofsd");
+    state = qemu_get_local_state_dir();
+    dir = g_build_filename(state, "run", "virtiofsd", NULL);
 
     if (g_mkdir_with_parents(dir, S_IRWXU) < 0) {
         fuse_log(FUSE_LOG_ERR, "%s: Failed to create directory %s: %s\n",

util/oslib-posix.c

@@ -297,12 +297,9 @@ int qemu_pipe(int pipefd[2])
 }
 
 char *
-qemu_get_local_state_pathname(const char *relative_pathname)
+qemu_get_local_state_dir(void)
 {
-    g_autofree char *dir = g_strdup_printf("%s/%s",
-                                           CONFIG_QEMU_LOCALSTATEDIR,
-                                           relative_pathname);
-    return get_relocated_path(dir);
+    return get_relocated_path(CONFIG_QEMU_LOCALSTATEDIR);
 }
 
 void qemu_set_tty_echo(int fd, bool echo)

util/oslib-win32.c

@@ -235,7 +235,7 @@ int qemu_get_thread_id(void)
 }
 
 char *
-qemu_get_local_state_pathname(const char *relative_pathname)
+qemu_get_local_state_dir(void)
 {
     HRESULT result;
     char base_path[MAX_PATH+1] = "";
@@ -247,8 +247,7 @@ qemu_get_local_state_pathname(const char *relative_pathname)
         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
         abort();
     }
-    return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
-                           relative_pathname);
+    return g_strdup(base_path);
 }
 
 void qemu_set_tty_echo(int fd, bool echo)