68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
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/* See LICENSE file for copyright and license details. */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "util.h"
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#include "md5.h"
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static void md5sum(int fd, const char *f);
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static void
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usage(void)
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{
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eprintf("usage: %s [file...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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int fd;
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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if (argc == 0) {
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md5sum(STDIN_FILENO, "<stdin>");
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} else {
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for (; argc > 0; argc--) {
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if ((fd = open(*argv, O_RDONLY)) < 0)
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eprintf("open %s:", *argv);
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md5sum(fd, *argv);
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close(fd);
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argv++;
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}
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}
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return 0;
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}
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static void
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md5sum(int fd, const char *f)
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{
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unsigned char buf[BUFSIZ];
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unsigned char digest[MD5_DIGEST_LENGTH];
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struct md5 s;
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ssize_t n;
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int i;
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md5_init(&s);
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while ((n = read(fd, buf, sizeof buf)) > 0)
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md5_update(&s, buf, n);
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if (n < 0) {
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eprintf("%s: read error:", f);
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return;
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}
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md5_sum(&s, digest);
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for (i = 0; i < sizeof(digest); i++)
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printf("%02x", digest[i]);
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printf(" %s\n", f);
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}
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