When not reading from a tty use getline().

src/ocpasswd.c

@@ -277,7 +277,8 @@ int main(int argc, char **argv)
 {
 	int ret, optct;
 	const char *username, *groupname, *fpasswd;
-	const char* passwd;
+	char* passwd;
+	size_t l, i;
 
 	if ((ret = gnutls_global_init()) < 0) {
 		fprintf(stderr, "global_init: %s\n", gnutls_strerror(ret));
@@ -315,15 +316,16 @@ int main(int argc, char **argv)
 		unlock_user(fpasswd, username);
 	else { /* set password */
 
-		passwd = getpass("Enter password: ");
-		if (passwd == NULL) {
-			fprintf(stderr, "Please specify a password\n");
-			exit(1); 
-		}
-
 		if (isatty(STDIN_FILENO)) {
 			char* p2;
 
+			passwd = getpass("Enter password: ");
+			if (passwd == NULL) {
+				fprintf(stderr, "Please specify a password\n");
+				exit(1);
+			}
+
+
 			p2 = strdup(passwd);
 			passwd = getpass("Re-enter password: ");
 			if (passwd == NULL) {
@@ -336,6 +338,16 @@ int main(int argc, char **argv)
 				exit(1);
 			}
 			free(p2);
+		} else {
+			passwd = NULL;
+			l = getline(&passwd, &i, stdin);
+			if (l <= 1) {
+				fprintf(stderr, "Please specify a password\n");
+				exit(1);
+			}
+
+			if (passwd[l-1] == '\n')
+				passwd[l-1] = 0;
 		}
 
 		crypt_int(fpasswd, username, groupname, passwd);