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MetaWayland: redirect stdin/stdout/stderr when running on bare metal

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We need to spawn background processes for gnome-session and friends,
so we need to make sure they don't try to read or write from our
terminal.

https://bugzilla.gnome.org/show_bug.cgi?id=705861
This commit is contained in:
Giovanni Campagna
2013-08-09 17:56:24 +02:00
parent fa3ca2bf10
commit b29d8046b0
1 changed files with 20 additions and 0 deletions
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20
src/wayland/meta-wayland.c
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@@ -1507,6 +1507,8 @@ meta_wayland_init (void)
if (compositor->drm_fd >= 0) if (compositor->drm_fd >= 0)
{ {
GError *error; GError *error;
char path[PATH_MAX];
int fd;
/* Running on bare metal, let's initalize DRM master and VT handling */ /* Running on bare metal, let's initalize DRM master and VT handling */
compositor->tty = meta_tty_new (); compositor->tty = meta_tty_new ();
@@ -1523,6 +1525,24 @@ meta_wayland_init (void)
g_error ("Failed to become DRM master: %s", error->message); g_error ("Failed to become DRM master: %s", error->message);
g_error_free (error); g_error_free (error);
} }
/* Open a log in the home directory. This is necessary because otherwise
all background processes (such as gnome-session and children) get SIGTTOU
trying to write to the terminal.
Then close (</dev/null) stdin, so we don't get SIGTTIN or other crazy stuff.
*/
snprintf(path, PATH_MAX, "%s/gnome-wayland.log", g_get_user_cache_dir ());
fd = open (path, O_WRONLY | O_APPEND | O_CREAT | O_TRUNC, 0600);
if (fd < 0)
fd = open ("/dev/null", O_WRONLY | O_NOCTTY, 0600);
dup2 (fd, STDOUT_FILENO);
dup2 (fd, STDERR_FILENO);
close (fd);
fd = open ("/dev/null", O_WRONLY | O_NOCTTY, 0600);
dup2 (fd, STDIN_FILENO);
} }
compositor->stage = meta_wayland_stage_new (); compositor->stage = meta_wayland_stage_new ();