[OpenWrt-Devel] [PATCH] procd: delay inittab workers until the tty exists.

[Owen Kirby]

If a process with a tty is specified in inittab, delay the worker process until the tty exists.

This allows starting consoles with terminals that get delayed until after procd is reads inittab,
and it also allows hotplugging USB-to-serial adapters attached long after booting.

Signed-off-by: Owen Kirby <osk at exegin.com>
---
  inittab.c | 14 ++++++++++----
  1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/inittab.c b/inittab.c
index 623103d..73c113f 100644
--- a/inittab.c
+++ b/inittab.c
@@ -99,9 +99,15 @@ static void fork_worker(struct init_action *a)
  	if (!a->proc.pid) {
  		p = setsid();
  
-		fd = dev_open(a->id);
-		if (fd != -1)
-		{
+		if (a->id) {
+			struct timespec tm;
+			tm.tv_sec = a->respawn / 1000;
+			tm.tv_nsec = (a->respawn % 1000) * 1000000;
+
+			while ((fd = dev_open(a->id)) == -1)
+				if (nanosleep(&tm, NULL) == -1)
+					exit(-1);
+
  			dup2(fd, STDIN_FILENO);
  			dup2(fd, STDOUT_FILENO);
  			dup2(fd, STDERR_FILENO);
@@ -157,7 +163,7 @@ static void askfirst(struct init_action *a)
  {
  	int i;
  
-	if (!dev_exist(a->id) || (console && !strcmp(console, a->id))) {
+	if (console && !strcmp(console, a->id)) {
  		DEBUG(4, "Skipping %s\n", a->id);
  		return;
  	}
-- 
1.9.1
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