Implement verbose output for xmccomm.c

xmccomm.c

@@ -15,6 +15,18 @@
 
 #define streq(A,B) (!strcmp(A,B))
 
+static void print_ok() {
+	printf(SHELL_ESC"[;32;02m[ok] "SHELL_ESC"[m");
+}
+
+static void print_er() {
+	printf(SHELL_ESC"[;31;02m[ER] "SHELL_ESC"[m");
+}
+
+static void print_vb(char *msg) {
+	printf(SHELL_ESC"[;36;02m[vb] "SHELL_ESC"[m%s", msg);
+}
+
 static bool recv_response(FILE *fh, char *buf, size_t buf_size) {
 	int pos = 0;
 
@@ -46,12 +58,20 @@ static bool recv_response(FILE *fh, char *buf, size_t buf_size) {
 static int connect_tty(char *tty) {
 
 	bool exists = false;
+	unsigned retry = 0;
 	do {
+		print_vb("");
+		printf("open('%s') try %u\n", tty, retry);
+		++retry;
+
 		struct stat sbuf;
 		int res = stat(tty, &sbuf);
 
 		exists = (0 == res);
-	} while(!exists && errno != EACCES);
+		if(!exists) {
+			usleep(500 * 1000);
+		}
+	} while(!exists && errno != EACCES && retry < 10);
 
 	int fd = open(tty, O_RDWR | O_NOCTTY);
 	if(-1 == fd) {
@@ -60,6 +80,8 @@ static int connect_tty(char *tty) {
 			fprintf(stderr, "Make sure current user `%s` is in group `dialout`\n", getlogin());
 		}
 		exit(EXIT_FAILURE);
+	} else {
+		print_vb(""); printf("%s successfully opened\n", tty);
 	}
 
 	// setup control structure
@@ -158,14 +180,6 @@ static void resp_eic(bool success, char *resp) {
 	printf("Instruction Cache now enabled!");
 }
 
-static void print_ok() {
-	printf(SHELL_ESC"[;32;02m[ok] "SHELL_ESC"[m");
-}
-
-static void print_er() {
-	printf(SHELL_ESC"[;31;02m[ER] "SHELL_ESC"[m");
-}
-
 static void response_loop(FILE *fh, void (*cb)(bool, char*)) {
 	bool done = false;
 	char buf[128];
@@ -223,10 +237,12 @@ int main(int argc, char *argv[]) {
 		return EXIT_FAILURE;
 	}
 
+	print_vb("Requesting device info...\n");
 	fprintf(fh, "inf \n");
 	fflush(fh);
 	response_loop(fh, resp_inf);
 
+	print_vb("Sending user commands...\n");
 	for(int i = 2; i < argc; ++i) {
 		struct command *cmd = NULL;
 
@@ -242,6 +258,8 @@ int main(int argc, char *argv[]) {
 			return EXIT_FAILURE;
 		}
 
+		print_vb(""); printf("Sending command '%s'...\n", argv[i]);
+
 		fprintf(fh, "%s \n", argv[i]);
 		fflush(fh);