util/guest-random: Clean up global variable shadowing

Fix:

  util/guest-random.c:90:45: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  int qemu_guest_random_seed_main(const char *optarg, Error **errp)
                                              ^
  /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/getopt.h:77:14: note: previous declaration is here
  extern char *optarg;                    /* getopt(3) external variables */
               ^

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Message-ID: <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Signed-off-by: Markus Armbruster <[email protected]>

Author: philmd

include/qemu/guest-random.h

@@ -13,16 +13,16 @@
 #define QEMU_GUEST_RANDOM_H
 
 /**
- * qemu_guest_random_seed_main(const char *optarg, Error **errp)
- * @optarg: a non-NULL pointer to a C string
+ * qemu_guest_random_seed_main(const char *seedstr, Error **errp)
+ * @seedstr: a non-NULL pointer to a C string
  * @errp: an error indicator
  *
- * The @optarg value is that which accompanies the -seed argument.
+ * The @seedstr value is that which accompanies the -seed argument.
  * This forces qemu_guest_getrandom into deterministic mode.
  *
  * Returns 0 on success, < 0 on failure while setting *errp.
  */
-int qemu_guest_random_seed_main(const char *optarg, Error **errp);
+int qemu_guest_random_seed_main(const char *seedstr, Error **errp);
 
 /**
  * qemu_guest_random_seed_thread_part1(void)

util/guest-random.c

@@ -87,11 +87,11 @@ void qemu_guest_random_seed_thread_part2(uint64_t seed)
     }
 }
 
-int qemu_guest_random_seed_main(const char *optarg, Error **errp)
+int qemu_guest_random_seed_main(const char *seedstr, Error **errp)
 {
     uint64_t seed;
-    if (parse_uint_full(optarg, 0, &seed)) {
-        error_setg(errp, "Invalid seed number: %s", optarg);
+    if (parse_uint_full(seedstr, 0, &seed)) {
+        error_setg(errp, "Invalid seed number: %s", seedstr);
         return -1;
     } else {
         deterministic = true;