util: fix misuse of memcmp

[elogind.git] / src / shared / util.c

diff --git a/src/shared/util.c b/src/shared/util.c
index 38134ae521b61963de65667dc7920dffc9d9bf32..c71293106f228910d52323957b78e1baa9cbaf4b 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -2501,7 +2501,7 @@ int getttyname_malloc(int fd, char **r) {
         assert(r);
 
         k = ttyname_r(fd, path, sizeof(path));
-        if (k != 0)
+        if (k > 0)
                 return -k;
 
         char_array_0(path);
@@ -5379,7 +5379,7 @@ bool is_locale_utf8(void) {
                 goto out;
         }
 
-        if(streq(set, "UTF-8")) {
+        if (streq(set, "UTF-8")) {
                 cached_answer = true;
                 goto out;
         }
@@ -5791,6 +5791,8 @@ void* greedy_realloc(void **p, size_t *allocated, size_t need) {
         size_t a;
         void *q;
 
+        assert(allocated);
+
         if (*allocated >= need)
                 return *p;
 
@@ -5804,6 +5806,20 @@ void* greedy_realloc(void **p, size_t *allocated, size_t need) {
         return q;
 }
 
+void* greedy_realloc0(void **p, size_t *allocated, size_t need) {
+        size_t prev = *allocated;
+        uint8_t *q;
+
+        q = greedy_realloc(p, allocated, need);
+        if (!q)
+                return NULL;
+
+        if (*allocated > prev)
+                memset(&q[prev], 0, *allocated - prev);
+
+        return q;
+}
+
 bool id128_is_valid(const char *s) {
         size_t i, l;
 
@@ -5903,7 +5919,7 @@ int shall_restore_state(void) {
                 return 1;
 
         FOREACH_WORD_QUOTED(w, l, line, state)
-                if (l == 23 && memcmp(w, "systemd.restore_state=0", 23))
+                if (l == 23 && strneq(w, "systemd.restore_state=0", 23))
                         return 0;
 
         return 1;