1 files changed, 15 insertions, 27 deletions

diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index abc6b5813..5946323d0 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -87,7 +87,6 @@ struct mapping_defn_t {
 
         char *script;
 
-        int max_mappings;
         int n_mappings;
         char **mapping;
 };
@@ -102,7 +101,6 @@ struct interface_defn_t {
         const struct method_t *method;
 
         char *iface;
-        int max_options;
         int n_options;
         struct variable_t *option;
 };
@@ -138,6 +136,16 @@ struct globals {
 #define INIT_G() do { } while (0)
 
 
+static const char keywords_up_down[] ALIGN1 =
+        "up\0"
+        "down\0"
+        "pre-up\0"
+        "pre-down\0"
+        "post-up\0"
+        "post-down\0"
+;
+
+
 #if ENABLE_FEATURE_IFUPDOWN_IPV4 || ENABLE_FEATURE_IFUPDOWN_IPV6
 
 static void addstr(char **bufp, const char *str, size_t str_length)
@@ -803,7 +811,6 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
                                 currmap->match = xrealloc_vector(currmap->match, 4, currmap->n_matches);
                                 currmap->match[currmap->n_matches++] = xstrdup(first_word);
                         }
-                        /*currmap->max_mappings = 0; - done by xzalloc */
                         /*currmap->n_mappings = 0;*/
                         /*currmap->mapping = NULL;*/
                         /*currmap->script = NULL;*/
@@ -888,25 +895,16 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
                                 if (rest_of_line[0] == '\0')
                                         bb_error_msg_and_die("option with empty value \"%s\"", buf);
 
-                                if (strcmp(first_word, "up") != 0
-                                 && strcmp(first_word, "down") != 0
-                                 && strcmp(first_word, "pre-up") != 0
-                                 && strcmp(first_word, "pre-down") != 0
-                                 && strcmp(first_word, "post-up") != 0
-                                 && strcmp(first_word, "post-down") != 0
-                                ) {
+                                /* If not one of "up", "down",... words... */
+                                if (index_in_strings(keywords_up_down, first_word) < 0) {
                                         int i;
                                         for (i = 0; i < currif->n_options; i++) {
                                                 if (strcmp(currif->option[i].name, first_word) == 0)
                                                         bb_error_msg_and_die("duplicate option \"%s\"", buf);
                                         }
                                 }
-                                if (currif->n_options >= currif->max_options) {
-                                        currif->max_options += 10;
-                                        currif->option = xrealloc(currif->option,
-                                                sizeof(*currif->option) * currif->max_options);
-                                }
                                 debug_noise("\t%s=%s\n", first_word, rest_of_line);
+                                currif->option = xrealloc_vector(currif->option, 4, currif->n_options);
                                 currif->option[currif->n_options].name = xstrdup(first_word);
                                 currif->option[currif->n_options].value = xstrdup(rest_of_line);
                                 currif->n_options++;
@@ -918,11 +916,7 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
                                                 bb_error_msg_and_die("duplicate script in mapping \"%s\"", buf);
                                         currmap->script = xstrdup(next_word(&rest_of_line));
                                 } else if (strcmp(first_word, "map") == 0) {
-                                        if (currmap->n_mappings >= currmap->max_mappings) {
-                                                currmap->max_mappings = currmap->max_mappings * 2 + 1;
-                                                currmap->mapping = xrealloc(currmap->mapping,
-                                                        sizeof(char *) * currmap->max_mappings);
-                                        }
+                                        currmap->mapping = xrealloc_vector(currmap->mapping, 2, currmap->n_mappings);
                                         currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&rest_of_line));
                                         currmap->n_mappings++;
                                 } else {
@@ -986,13 +980,7 @@ static void set_environ(struct interface_defn_t *iface, const char *mode)
         pp = G.my_environ;
 
         for (i = 0; i < iface->n_options; i++) {
-                if (strcmp(iface->option[i].name, "up") == 0
-                 || strcmp(iface->option[i].name, "down") == 0
-                 || strcmp(iface->option[i].name, "pre-up") == 0
-                 || strcmp(iface->option[i].name, "pre-down") == 0
-                 || strcmp(iface->option[i].name, "post-up") == 0
-                 || strcmp(iface->option[i].name, "post-down") == 0
-                ) {
+                if (index_in_strings(keywords_up_down, iface->option[i].name) >= 0) {
                         continue;
                 }
                 *pp++ = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);