d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* cksum - calculate the CRC32 checksum of a file
|
|
*
|
|
* Copyright (C) 2006 by Rob Sullivan, with ideas from code by Walter Harms
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */
|
|
|
|
#include "busybox.h"
|
|
|
|
int cksum_main(int argc, char **argv) {
|
|
|
|
uint32_t *crc32_table = crc32_filltable(1);
|
|
|
|
FILE *fp;
|
|
uint32_t crc;
|
|
long length, filesize;
|
|
int bytes_read;
|
|
char *cp;
|
|
RESERVE_CONFIG_BUFFER(buf, BUFSIZ);
|
|
int inp_stdin = (argc == optind) ? 1 : 0;
|
|
|
|
do {
|
|
fp = bb_wfopen_input((inp_stdin) ? bb_msg_standard_input : *++argv);
|
|
|
|
crc = 0;
|
|
length = 0;
|
|
|
|
while ((bytes_read = fread(buf, 1, BUFSIZ, fp)) > 0) {
|
|
cp = buf;
|
|
length += bytes_read;
|
|
while (bytes_read--)
|
|
crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ (*cp++)) & 0xffL];
|
|
}
|
|
|
|
filesize = length;
|
|
|
|
for (; length; length >>= 8)
|
|
crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ length) & 0xffL];
|
|
crc ^= 0xffffffffL;
|
|
|
|
if (inp_stdin) {
|
|
printf("%"PRIu32" %li\n", crc, filesize);
|
|
break;
|
|
}
|
|
|
|
printf("%"PRIu32" %li %s\n", crc, filesize, *argv);
|
|
fclose(fp);
|
|
} while (*(argv+1));
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|