Move the uid-range parser to string.c.

[adu.git] / string.c

diff --git a/string.c b/string.c
index 8bd34460877a389a40a85bccb67dfed49ead9871..8b6ea5a90e466f67064ad2ef9d755b6fd7ee783a 100644 (file)
--- a/string.c
+++ b/string.c
@@ -25,7 +25,7 @@
  *
  * \sa realloc(3).
  */
-__must_check __malloc void *para_realloc(void *p, size_t size)
+__must_check __malloc void *adu_realloc(void *p, size_t size)
 {
        /*
         * No need to check for NULL pointers: If p is NULL, the  call
@@ -52,7 +52,7 @@ __must_check __malloc void *para_realloc(void *p, size_t size)
  *
  * \sa malloc(3).
  */
-__must_check __malloc void *para_malloc(size_t size)
+__must_check __malloc void *adu_malloc(size_t size)
 {
        assert(size);
        void *p = malloc(size);
@@ -77,9 +77,9 @@ __must_check __malloc void *para_malloc(size_t size)
  *
  * \sa calloc(3)
  */
-__must_check __malloc void *para_calloc(size_t size)
+__must_check __malloc void *adu_calloc(size_t size)
 {
-       void *ret = para_malloc(size);
+       void *ret = adu_malloc(size);
 
        memset(ret, 0, size);
        return ret;
@@ -98,7 +98,7 @@ __must_check __malloc void *para_calloc(size_t size)
  *
  * \sa strdup(3)
  */
-__must_check __malloc char *para_strdup(const char *s)
+__must_check __malloc char *adu_strdup(const char *s)
 {
        char *ret;
 
@@ -148,7 +148,7 @@ __must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...)
  *
  * \sa strtol(3), atoi(3).
  */
-int para_atoi64(const char *str, int64_t *value)
+__must_check int atoi64(const char *str, int64_t *result)
 {
        char *endptr;
        long long tmp;
@@ -163,6 +163,62 @@ int para_atoi64(const char *str, int64_t *value)
                return -E_ATOI_NO_DIGITS;
        if (*endptr != '\0') /* Further characters after number */
                return -E_ATOI_JUNK_AT_END;
-       *value = tmp;
+       *result = tmp;
        return 1;
 }
+
+static int check_uid_arg(const char *arg, uint32_t *uid)
+{
+       const uint32_t max = ~0U;
+       /*
+        * we need an 64-bit int for string -> uid conversion because strtoll()
+        * returns a signed value.
+        */
+       int64_t val;
+       int ret = atoi64(arg, &val);
+
+       if (ret < 0)
+               return ret;
+       if (val < 0 || val > max)
+               return -ERRNO_TO_ERROR(EINVAL);
+       *uid = val;
+       return 1;
+}
+
+int parse_uid_range(const char *orig_arg, struct uid_range *ur)
+{
+       int ret;
+       char *arg = adu_strdup(orig_arg), *p = strchr(arg, '-');
+
+       if (!p || p == arg) { /* -42 or 42 */
+               ret = check_uid_arg(p? p + 1 : arg, &ur->high);
+               if (ret < 0)
+                       goto out;
+               ur->low = p? 0 : ur->high;
+               ret = 1;
+               goto out;
+       }
+       /* 42- or 42-4711 */
+       *p = '\0';
+       p++;
+       ret = check_uid_arg(arg, &ur->low);
+       if (ret < 0)
+               goto out;
+       ur->high = ~0U;
+       if (*p) { /* 42-4711 */
+               ret = check_uid_arg(p, &ur->high);
+               if (ret < 0)
+                       goto out;
+       }
+       if (ur->low > ur->high)
+               ret = -ERRNO_TO_ERROR(EINVAL);
+out:
+       if (ret < 0)
+               ERROR_LOG("bad uid option: %s\n", orig_arg);
+       else
+               INFO_LOG("admissible uid range: %u - %u\n", ur->low,
+                       ur->high);
+       free(arg);
+       return ret;
+}
+