diff options
Diffstat (limited to 'coreutils/cksum.c')
| -rw-r--r-- | coreutils/cksum.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/coreutils/cksum.c b/coreutils/cksum.c index 6b601b7..83b7e32 100644 --- a/coreutils/cksum.c +++ b/coreutils/cksum.c @@ -51,7 +51,7 @@ int cksum_main(int argc UNUSED_PARAM, char **argv) setup_common_bufsiz(); do { uint32_t crc; - off_t filesize; + IF_CKSUM(off_t filesize;) const char *fname = *argv ? *argv : bb_msg_standard_input; int fd = open_or_warn_stdin(fname); @@ -61,37 +61,43 @@ int cksum_main(int argc UNUSED_PARAM, char **argv) } crc = IS_CKSUM ? 0 : 0xffffffff; - filesize = 0; + IF_CKSUM(filesize = 0;) #define read_buf bb_common_bufsiz1 for (;;) { int bytes_read = safe_read(fd, read_buf, COMMON_BUFSIZE); if (bytes_read < 0) bb_simple_perror_msg_and_die(fname); if (bytes_read > 0) { - filesize += bytes_read; + IF_CKSUM(filesize += bytes_read;) } else { + IF_CKSUM(uoff_t t;) + close(fd); + if (IS_CRC32) + break; +#if ENABLE_CKSUM fd = -1; /* break flag */ /* Checksum filesize bytes, LSB first */ - if (IS_CKSUM) { - uoff_t t = filesize; - bytes_read = 0; - while (t != 0) { - read_buf[bytes_read++] = (uint8_t)t; - t >>= 8; - } + t = filesize; + /*bytes_read = 0; - already is */ + while (t != 0) { + read_buf[bytes_read++] = (uint8_t)t; + t >>= 8; } +#endif } crc = (IS_CKSUM ? crc32_block_endian1 : crc32_block_endian0)(crc, read_buf, bytes_read, crc32_table); - if (fd < 0) + if (ENABLE_CKSUM && fd < 0) break; } crc = ~crc; +#if ENABLE_CKSUM if (IS_CKSUM) printf((*argv ? "%u %"OFF_FMT"u %s\n" : "%u %"OFF_FMT"u\n"), (unsigned)crc, filesize, *argv); else +#endif printf((*argv ? "%08x %s\n" : "%08x\n"), (unsigned)crc, *argv); } while (*argv && *++argv); |