1 files changed, 12 insertions, 9 deletions

diff --git a/coreutils/nice.c b/coreutils/nice.c
index d6818cf00..aa8b06cce 100644
--- a/coreutils/nice.c
+++ b/coreutils/nice.c
@@ -26,7 +26,7 @@
 #include "libbb.h"
 
 int nice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int nice_main(int argc, char **argv)
+int nice_main(int argc UNUSED_PARAM, char **argv)
 {
         int old_priority, adjustment;
 
@@ -40,18 +40,21 @@ int nice_main(int argc, char **argv)
         adjustment = 10;  /* Set default adjustment. */
 
         if (argv[0][0] == '-') {
-                if (argv[0][1] == 'n') { /* -n */
-                        if (argv[0][2]) { /* -nNNNN (w/o space) */
-                                argv[0] += 2; argv--; argc++;
+                char *nnn = argv[0] + 1;
+                if (nnn[0] == 'n') { /* -n */
+                        nnn += 1;
+                        if (!nnn[0]) { /* "-n NNN" */
+                                nnn = *++argv;
                         }
-                } else { /* -NNN (NNN may be negative) == -n NNN */
-                        argv[0] += 1; argv--; argc++;
+                        /* else: "-nNNN" (w/o space) */
                 }
-                if (argc < 4) {  /* Missing priority and/or utility! */
+                /* else: "-NNN" (NNN may be negative) - same as "-n NNN" */
+
+                if (!nnn || !argv[1]) {  /* Missing priority or PROG! */
                         bb_show_usage();
                 }
-                adjustment = xatoi_range(argv[1], INT_MIN/2, INT_MAX/2);
-                argv += 2;
+                adjustment = xatoi_range(nnn, INT_MIN/2, INT_MAX/2);
+                argv++;
         }
 
         {  /* Set our priority. */