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nlplug-findfs: allow user to override timeout with -t option

--- a/nlplug-findfs.c

+++ b/nlplug-findfs.c

@@ -37,7 +37,7 @@

 #include "arg.h"

-#define EVENT_TIMEOUT 2000

+#define DEFAULT_EVENT_TIMEOUT 250

 #define FOUND_DEVICE	0x1

 #define FOUND_BOOTREPO	0x2

@@ -87,6 +87,7 @@

 	int fork_count;

 	char *bootrepos;

 	char *apkovls;

+	int timeout;

 };

@@ -604,6 +605,7 @@

 	" -d              enable debugging ouput\n"

 	" -f SUBSYSTEM    filter subsystem\n"

 	" -p PROGRAM      use PROGRAM as handler for every event with DEVNAME\n"

+	" -t TIMEOUT      timeout after TIMEOUT milliseconds without uevents\n"

 	"\n", argv0);

 	exit(rc);

@@ -623,6 +625,7 @@

 	memset(&conf, 0, sizeof(conf));

 	conf.program_argv = program_argv;

+	conf.timeout = DEFAULT_EVENT_TIMEOUT;

 	argv0 = strrchr(argv[0], '/');

 	if (argv0++ == NULL)

 		argv0 = argv[0];

@@ -652,6 +655,9 @@

 	case 'p':

 		conf.program_argv[0] = EARGF(usage(1));

 		break;

+	case 't':

+		conf.timeout = atoi(EARGF(usage(1)));

+		break;

 	default:

 		usage(1);

 	} ARGEND;

@@ -669,7 +675,7 @@

 	pthread_create(&tid, NULL, trigger_thread, &fds[1].fd);

-	while ((r = poll(fds, numfds, EVENT_TIMEOUT)) > 0) {

+	while ((r = poll(fds, numfds, conf.timeout)) > 0) {

 		size_t len;

 		struct iovec iov;

 		char cbuf[CMSG_SPACE(sizeof(struct ucred))];