*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config SUM
+//config: bool "sum (4.3 kb)"
+//config: default y
+//config: help
+//config: checksum and count the blocks in a file
+
+//applet:IF_SUM(APPLET(sum, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SUM) += sum.o
//usage:#define sum_trivial_usage
//usage: "[-rs] [FILE]..."
//usage: "\n -s Use System V sum algorithm (512byte blocks)"
#include "libbb.h"
+#include "common_bufsiz.h"
enum { SUM_BSD, PRINT_NAME, SUM_SYSV };
/* Return 1 if successful. */
static unsigned sum_file(const char *file, unsigned type)
{
-#define buf bb_common_bufsiz1
unsigned long long total_bytes = 0;
int fd, r;
/* The sum of all the input bytes, modulo (UINT_MAX + 1). */
unsigned s = 0;
+#define buf bb_common_bufsiz1
+ setup_common_bufsiz();
+
fd = open_or_warn_stdin(file);
if (fd == -1)
return 0;
while (1) {
- size_t bytes_read = safe_read(fd, buf, BUFSIZ);
+ size_t bytes_read = safe_read(fd, buf, COMMON_BUFSIZE);
if ((ssize_t)bytes_read <= 0) {
r = (fd && close(fd) != 0);
if (type >= SUM_SYSV) {
r = (s & 0xffff) + ((s & 0xffffffff) >> 16);
s = (r & 0xffff) + (r >> 16);
- printf("%d %llu %s\n", s, (total_bytes + 511) / 512, file);
+ printf("%u %llu %s\n", s, (total_bytes + 511) / 512, file);
} else
- printf("%05d %5llu %s\n", s, (total_bytes + 1023) / 1024, file);
+ printf("%05u %5llu %s\n", s, (total_bytes + 1023) / 1024, file);
return 1;
#undef buf
}
n = sum_file("-", type);
} else {
/* Need to print the name if either
- - more than one file given
- - doing sysv */
+ * - more than one file given
+ * - doing sysv */
type += (argv[1] || type == SUM_SYSV);
n = 1;
do {