diff options
Diffstat (limited to 'toys/cksum.c')
| -rw-r--r-- | toys/cksum.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/toys/cksum.c b/toys/cksum.c index a3e53de8..a54738cc 100644 --- a/toys/cksum.c +++ b/toys/cksum.c @@ -6,15 +6,18 @@ * * See http://www.opengroup.org/onlinepubs/009695399/utilities/cksum.html -USE_CKSUM(NEWTOY(cksum, NULL, TOYFLAG_BIN)) +USE_CKSUM(NEWTOY(cksum, "F", TOYFLAG_BIN)) config CKSUM bool "cksum" default y help - usage: cksum [file...] + usage: cksum [-F] [file...] + For each file, output crc32 checksum value, length and name of file. If no files listed, copy from stdin. Filename "-" is a synonym for stdin. + + -F Start with 0xffffffff instead of 0. */ #include "toys.h" @@ -32,7 +35,7 @@ static unsigned cksum(unsigned crc, unsigned char c) static void do_cksum(int fd, char *name) { - unsigned crc = 0; + unsigned crc = toys.optflags ? 0xffffffff : 0; uint64_t llen = 0, llen2; // CRC the data |