2 files changed, 22 insertions, 0 deletions
diff --git a/lib/lib.c b/lib/lib.c
index 18578815..49f2be5e 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1099,3 +1099,22 @@ char* make_human_readable(unsigned long long size, unsigned long unit)
   }
   return NULL; //not reached
 }
+
+/*
+ * used to get the interger value.
+ */
+unsigned long get_int_value(const char *numstr, unsigned lowrange, unsigned highrange)
+{
+  unsigned long rvalue = 0;
+  char *ptr;
+  if(*numstr == '-' || *numstr == '+' || isspace(*numstr)) perror_exit("invalid number '%s'", numstr);
+  errno = 0;
+  rvalue = strtoul(numstr, &ptr, 10);
+  if(errno || numstr == ptr) perror_exit("invalid number '%s'", numstr);
+   if(*ptr) perror_exit("invalid number '%s'", numstr);
+   if(rvalue >= lowrange && rvalue <= highrange) return rvalue;
+   else {
+         perror_exit("invalid number '%s'", numstr);
+         return rvalue; //Not reachable; to avoid waring message.
+   }
+}
diff --git a/lib/lib.h b/lib/lib.h
index 2b452566..5e5cbdf1 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -175,3 +175,6 @@ int update_password(char *filename, char* username, char* encrypted);
 
 // du helper functions
 char* make_human_readable(unsigned long long size, unsigned long unit);
+
+// cut helper functions
+unsigned long get_int_value(const char *numstr, unsigned lowrange, unsigned highrange);