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Diffstat (limited to 'coreutils/cksum.c')
-rw-r--r--coreutils/cksum.c38
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);
}