#77, get password from env variable

CHANGELOG

@@ -21,6 +21,8 @@ CHANGES:
 	- Do not overwrite users CC/CFLAGS/LDFLAGS, only add to them.
 	- Added -F option to write pidfile, based on patch from
 		misc at mandriva.org. Fixes #70.
+	- Allow password to be set via environment variable, fixes #77.
+		Based on patch by logix.
 
 2009-06-01: 0.5.2 "WifiFree"
 	- Fixed client segfault on OS X, #57

man/iodine.8

@@ -254,6 +254,22 @@ dig \-t NS foo123.tunnel.com
 .B MTU issues:
 These issues should be solved now, with automatic fragmentation of downstream 
 packets. There should be no need to set the MTU explicitly on the server.
+.SH ENVIRONMENT
+.SS IODINE_PASS
+If the environment variable
+.B IODINE_PASS
+is set, iodine will use the value it is set to as password instead of asking
+for one. The 
+.B -P
+option still has preference.
+.SS IODINED_PASS
+If the environment variable
+.B IODINED_PASS
+is set, iodined will use the value it is set to as password instead of asking
+for one. The
+.B -P
+option still has preference.
+.El
 .SH BUGS
 File bugs at http://dev.kryo.se/iodine/
 .SH AUTHORS

src/iodine.c

@@ -48,6 +48,8 @@ WSADATA wsa_data;
 static char *__progname;
 #endif
 
+#define PASSWORD_ENV_VAR "IODINE_PASS"
+
 static void
 sighandler(int sig) 
 {
@@ -260,8 +262,12 @@ main(int argc, char **argv)
 #endif
 	}
 	
-	if (strlen(password) == 0) 
+	if (strlen(password) == 0) {
+		if (NULL != getenv(PASSWORD_ENV_VAR))
+			snprintf(password, sizeof(password), "%s", getenv(PASSWORD_ENV_VAR));
+		else
 			read_password(password, sizeof(password));
+	}
 	
 	client_set_password(password);
 

src/iodined.c

@@ -65,6 +65,8 @@ WORD req_version = MAKEWORD(2, 2);
 WSADATA wsa_data;
 #endif
 
+#define PASSWORD_ENV_VAR "IODINED_PASS"
+
 static int running = 1;
 static char *topdomain;
 static char password[33];
@@ -1344,8 +1346,12 @@ main(int argc, char **argv)
 		usage();
 	}
 	
-	if (strlen(password) == 0)
+	if (strlen(password) == 0) {
+		if (NULL != getenv(PASSWORD_ENV_VAR))
+			snprintf(password, sizeof(password), "%s", getenv(PASSWORD_ENV_VAR));
+		else
 			read_password(password, sizeof(password));
+	}
 
 	if ((tun_fd = open_tun(device)) == -1) {
 		retval = 1;