/* vi: set sw=4 ts=4: */ /* * Copyright (C) 2003-2004 Erik Andersen <andersen@codepoet.org> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include <stdio.h> #include <stdlib.h> #include <getopt.h> #include <errno.h> #include <assert.h> #include <ctype.h> #include "libbb.h" long bb_xgetlarg(const char *arg, int base, long lower, long upper) { long result; char *endptr; int errno_save = errno; assert(arg!=NULL); /* Don't allow leading whitespace. * Wrap isspace in () to make sure we call the * function rather than the macro. */ if ((isspace)(*arg)) { bb_show_usage(); } errno = 0; result = strtol(arg, &endptr, base); if (errno != 0 || *endptr!='\0' || endptr==arg || result < lower || result > upper) bb_show_usage(); errno = errno_save; return result; }