diff options
Diffstat (limited to 'coreutils/cksum.c')
| -rw-r--r-- | coreutils/cksum.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/coreutils/cksum.c b/coreutils/cksum.c index 5849ddab2..9a45fd656 100644 --- a/coreutils/cksum.c +++ b/coreutils/cksum.c @@ -3,12 +3,13 @@ * 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) { +int cksum_main(int argc, char **argv) +{ uint32_t *crc32_table = crc32_filltable(1); @@ -17,36 +18,36 @@ int cksum_main(int argc, char **argv) { 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; + + while ((bytes_read = fread(bb_common_bufsiz1, 1, BUFSIZ, fp)) > 0) { + cp = bb_common_bufsiz1; 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); + bb_printf("%" PRIu32 " %li\n", crc, filesize); break; } - - printf("%"PRIu32" %li %s\n", crc, filesize, *argv); + + bb_printf("%" PRIu32 " %li %s\n", crc, filesize, *argv); fclose(fp); - } while (*(argv+1)); - + } while (*(argv + 1)); + return EXIT_SUCCESS; } |