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Define bb_xgetlarg as a standard interface for extracting

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numbers from getopt which includes careful error checking.
 -Erik
This commit is contained in:
Eric Andersen 2003-03-07 17:29:12 +00:00
parent bae7c1ac24
commit a9c6bc41e9
3 changed files with 30 additions and 1 deletions
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1
include/libbb.h
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@ -121,6 +121,7 @@ int recursive_action(const char *fileName, int recurse, int followLinks, int dep
void* userData);
extern int parse_mode( const char* s, mode_t* theMode);
extern long bb_xgetlarg(char *arg, int base, long lower, long upper);
extern int get_kernel_revision(void);

2
libbb/Makefile.in
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@ -43,7 +43,7 @@ LIBBB_SRC:= \
setup_environment.c simplify_path.c syscalls.c syslog_msg_with_name.c \
time_string.c trim.c u_signal_names.c vdprintf.c verror_msg.c \
vherror_msg.c vperror_msg.c wfopen.c xconnect.c xgetcwd.c xfuncs.c \
xgethostbyname.c xgethostbyname2.c xreadlink.c xregcomp.c
xgethostbyname.c xgethostbyname2.c xreadlink.c xregcomp.c bb_xgetlarg.c
LIBBB_OBJS=$(patsubst %.c,$(LIBBB_DIR)%.o, $(LIBBB_SRC))

28
libbb/bb_xgetlarg.c Normal file
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@ -0,0 +1,28 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2003 Erik Andersen <andersee@debian.org>
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <assert.h>
#include "busybox.h"
extern long bb_xgetlarg(char *arg, int base, long lower, long upper)
{
long result;
char *endptr;
int errno_save = errno;
assert(arg!=NULL);
errno = 0;
result = strtol(arg, &endptr, base);
if (errno != 0 || *endptr!='\0' || result < lower || result > upper)
show_usage();
errno = errno_save;
return result;
}