diff options
Diffstat (limited to 'coreutils/cksum.c')
| -rw-r--r-- | coreutils/cksum.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/coreutils/cksum.c b/coreutils/cksum.c index dd274af..6512ccc 100644 --- a/coreutils/cksum.c +++ b/coreutils/cksum.c @@ -9,46 +9,48 @@ #include "libbb.h" int cksum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int cksum_main(int argc, char **argv) +int cksum_main(int argc ATTRIBUTE_UNUSED, char **argv) { uint32_t *crc32_table = crc32_filltable(NULL, 1); - - FILE *fp; uint32_t crc; long length, filesize; int bytes_read; - char *cp; + uint8_t *cp; - int inp_stdin = (argc == optind) ? 1 : 0; +#if ENABLE_DESKTOP + getopt32(argv, ""); /* coreutils 6.9 compat */ + argv += optind; +#else + argv++; +#endif do { - fp = fopen_or_warn_stdin((inp_stdin) ? bb_msg_standard_input : *++argv); + int fd = open_or_warn_stdin(*argv ? *argv : bb_msg_standard_input); + if (fd < 0) + continue; crc = 0; length = 0; #define read_buf bb_common_bufsiz1 - while ((bytes_read = fread(read_buf, 1, BUFSIZ, fp)) > 0) { + while ((bytes_read = safe_read(fd, read_buf, sizeof(read_buf))) > 0) { cp = read_buf; length += bytes_read; - while (bytes_read--) - crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ (*cp++)) & 0xffL]; + do { + crc = (crc << 8) ^ crc32_table[(crc >> 24) ^ *cp++]; + } while (--bytes_read); } + close(fd); filesize = length; for (; length; length >>= 8) - crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ length) & 0xffL]; + crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ length) & 0xff]; 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)); + printf((*argv ? "%" PRIu32 " %li %s\n" : "%" PRIu32 " %li\n"), + crc, filesize, *argv); + } while (*argv && *++argv); fflush_stdout_and_exit(EXIT_SUCCESS); } |