Add init support

It is useful to start kmsfb-manage as init process to display a image as
early as possible. kmsfb-manage forks itself first and starts /sbin/init
from the pid 1 process.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/kmsfb-manage.c b/src/kmsfb-manage.c
index 0edecf7..70559a2 100644
--- a/src/kmsfb-manage.c
+++ b/src/kmsfb-manage.c
@@ -1285,9 +1285,22 @@ int main(int argc, char *argv[])
 	struct drm_resource *res;
 	int err;
 	char **parse_args;
+	pid_t kmsfbpid;
 	char *cmdline;
 	char *cmdlinev[MAX_ARGS];
 
+	kmsfbpid = getpid();
+	if (kmsfbpid == 1) {
+		pid_t pid;
+
+		pid = fork();
+		if (pid > 0) {
+			printf("kmsfb-manage forking init\n");
+			execl("/sbin/init", "/sbin/init", NULL);
+			exit(1);
+		}
+	}
+
 	if (argc <= 1) {
 		int f;
 		int ret;