[PATCH] Fix sscanf("-1", "%d", &i)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index b1d4e4a23ccb48df97d86d00baa0684892775eb6..b7e6d06581dc9f8744b6bbfed8323d64993a6204 100644 (file)
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -517,6 +517,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 {
        const char *str = buf;
        char *next;
+       char digit;
        int num = 0;
        int qualifier;
        int base;
@@ -638,12 +639,16 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
                while (isspace(*str))
                        str++;
 
-               if (!*str
-                    || (base == 16 && !isxdigit(*str))
-                    || (base == 10 && !isdigit(*str))
-                    || (base == 8 && (!isdigit(*str) || *str > '7'))
-                    || (base == 0 && !isdigit(*str)))
-                       break;
+               digit = *str;
+               if (is_sign && digit == '-')
+                       digit = *(str + 1);
+
+               if (!digit
+                    || (base == 16 && !isxdigit(digit))
+                    || (base == 10 && !isdigit(digit))
+                    || (base == 8 && (!isdigit(digit) || digit > '7'))
+                    || (base == 0 && !isdigit(digit)))
+                               break;
 
                switch(qualifier) {
                case 'h':