X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincctl.c;h=abc5c095a82c5d07a977c4c3ddbc0e5be81955ee;hp=fc59c580c36fffefa842f56465b2417b0b08ca77;hb=0c7e0210d900185d4c1a9ffd969dc2a26d9523a9;hpb=3ccdf50beb6b2d3f2730bdc66006b43190537cde

diff --git a/src/tincctl.c b/src/tincctl.c
index fc59c580..abc5c095 100644
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -89,7 +89,7 @@ static struct option const long_options[] = {
 static void version(void) {
 	printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
 		   BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
-	printf("Copyright (C) 1998-2014 Ivo Timmermans, Guus Sliepen and others.\n"
+	printf("Copyright (C) 1998-2015 Ivo Timmermans, Guus Sliepen and others.\n"
 			"See the AUTHORS file for a complete list.\n\n"
 			"tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 			"and you are welcome to redistribute it under certain conditions;\n"
@@ -233,6 +233,12 @@ FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
 	perms &= ~mask;
 	umask(~perms);
 	FILE *f = fopen(filename, mode);
+
+	if(!f) {
+		fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+		return NULL;
+	}
+
 #ifdef HAVE_FCHMOD
 	if((perms & 0444) && f)
 		fchmod(fileno(f), perms);
@@ -411,6 +417,7 @@ static bool ed25519_keygen(bool ask) {
 
 	char *pubkey = ecdsa_get_base64_public_key(key);
 	fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
+	free(pubkey);
 
 	fclose(f);
 	ecdsa_free(key);
@@ -853,6 +860,13 @@ static int cmd_start(int argc, char *argv[]) {
 	}
 	return status;
 #else
+	int pfd[2] = {-1, -1};
+	if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
+		fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
+		free(nargv);
+		return 1;
+	}
+
 	pid_t pid = fork();
 	if(pid == -1) {
 		fprintf(stderr, "Could not fork: %s\n", strerror(errno));
@@ -860,8 +874,15 @@ static int cmd_start(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!pid)
+	if(!pid) {
+		close(pfd[0]);
+		char buf[100] = "";
+		snprintf(buf, sizeof buf, "%d", pfd[1]);
+		setenv("TINC_UMBILICAL", buf, true);
 		exit(execvp(c, nargv));
+	} else {
+		close(pfd[1]);
+	}
 
 	free(nargv);
 
@@ -869,12 +890,33 @@ static int cmd_start(int argc, char *argv[]) {
 #ifdef SIGINT
 	signal(SIGINT, SIG_IGN);
 #endif
+
+	// Pass all log messages from the umbilical to stderr.
+	// A nul-byte right before closure means tincd started succesfully.
+	bool failure = true;
+	char buf[1024];
+	ssize_t len;
+
+	while((len = read(pfd[0], buf, sizeof buf)) > 0) {
+		failure = buf[len - 1];
+		if(!failure)
+			len--;
+		write(2, buf, len);
+	}
+
+	if(len)
+		failure = true;
+
+	close(pfd[0]);
+
+	// Make sure the child process is really gone.
 	result = waitpid(pid, &status, 0);
+
 #ifdef SIGINT
 	signal(SIGINT, SIG_DFL);
 #endif
 
-	if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
+	if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
 		fprintf(stderr, "Error starting %s\n", c);
 		return 1;
 	}
@@ -1763,7 +1805,7 @@ static int cmd_config(int argc, char *argv[]) {
 }
 
 static bool try_bind(int port) {
-	struct addrinfo *ai = NULL;
+	struct addrinfo *ai = NULL, *aip;
 	struct addrinfo hint = {
 		.ai_flags = AI_PASSIVE,
 		.ai_family = AF_UNSPEC,
@@ -1771,24 +1813,30 @@ static bool try_bind(int port) {
 		.ai_protocol = IPPROTO_TCP,
 	};
 
+	bool success = true;
 	char portstr[16];
 	snprintf(portstr, sizeof portstr, "%d", port);
 
 	if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
 		return false;
 
-	while(ai) {
+	for(aip = ai; aip; aip = aip->ai_next) {
 		int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
-		if(!fd)
-			return false;
+		if(!fd) {
+			success = false;
+			break;
+		}
+
 		int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
 		closesocket(fd);
-		if(result)
-			return false;
-		ai = ai->ai_next;
+		if(result) {
+			success = false;
+			break;
+		}
 	}
 
-	return true;
+	freeaddrinfo(ai);
+	return success;
 }
 
 int check_port(char *name) {
@@ -2558,7 +2606,7 @@ int main(int argc, char *argv[]) {
 	if(!parse_options(argc, argv))
 		return 1;
 
-	make_names();
+	make_names(false);
 	xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
 	xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);