script: Parse argument as a string

This allows "" to equal /dev/null.

diff --git a/src/if-options.c b/src/if-options.c
index 9ef3bdbbb9c19373b00ae2698c5fc957eb10f9e3..dee07eb11874ea68a3908aa3f585ecd96a7ec304 100644 (file)
--- a/src/if-options.c
+++ b/src/if-options.c
@@ -709,13 +709,23 @@ parse_option(struct dhcpcd_ctx *ctx, const char *ifname, struct if_options *ifo,
        case 'c':
                ARG_REQUIRED;
                free(ifo->script);
-               if (*arg == '\0' || strcmp(arg, "/dev/null") == 0) {
+               s = parse_string(NULL, 0, arg);
+               if (s == 0) {
                        ifo->script = NULL;
                        break;
                }
-               ifo->script = strdup(arg);
-               if (ifo->script == NULL)
+               dl = (size_t)s;
+               if (s == -1 || (ifo->script = malloc(dl)) == NULL) {
                        logerr(__func__);
+                       return -1;
+               }
+               parse_string(ifo->script, dl, arg);
+               if (ifo->script[0] == '\0' ||
+                   strcmp(ifo->script, "/dev/null") == 0)
+               {
+                       free(ifo->script);
+                       ifo->script = NULL;
+               }
                break;
        case 'd':
                ifo->options |= DHCPCD_DEBUG;