Log output to systemd journal if available

Previously, we put stuff in /var/log/gdm for the session, and
then ~/.cache/gdm/session.log for the user.

Now let's use explicit sd_journal_stream_fd() calls.

Some adjustments from Ray Strode.

https://bugzilla.gnome.org/show_bug.cgi?id=676181

2 files changed, 28 insertions, 0 deletions

diff --git a/common/gdm-common.c b/common/gdm-common.c
index faab0d7a..ae6129c2 100644
--- a/common/gdm-common.c
+++ b/common/gdm-common.c
@@ -66,6 +66,32 @@ gdm_is_version_unstable (void)
 }
 
 gboolean
+gdm_clear_close_on_exec_flag (int fd)
+{
+        int flags;
+
+        if (fd < 0) {
+                return FALSE;
+        }
+
+        flags = fcntl (fd, F_GETFD, 0);
+
+        if (flags < 0) {
+                return FALSE;
+        }
+
+        if ((flags & FD_CLOEXEC) != 0) {
+                int status;
+
+                status = fcntl (fd, F_SETFD, flags & ~FD_CLOEXEC);
+
+                return status != -1;
+        }
+
+        return TRUE;
+}
+
+gboolean
 gdm_get_pwent_for_name (const char     *name,
                         struct passwd **pwentp)
 {
diff --git a/common/gdm-common.h b/common/gdm-common.h
index 61d2dd30..00012743 100644
--- a/common/gdm-common.h
+++ b/common/gdm-common.h
@@ -45,6 +45,8 @@ int            gdm_signal_pid            (int pid,
 gboolean       gdm_get_pwent_for_name    (const char     *name,
                                           struct passwd **pwentp);
 
+gboolean       gdm_clear_close_on_exec_flag (int fd);
+
 const char *   gdm_make_temp_dir         (char    *template);
 
 gboolean       gdm_string_hex_encode     (const GString *source,