78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <md5.h>
|
|
|
|
/* When this was written, bionic's md5.h did not define this. */
|
|
#ifndef MD5_DIGEST_LENGTH
|
|
#define MD5_DIGEST_LENGTH 16
|
|
#endif
|
|
|
|
static int usage()
|
|
{
|
|
fprintf(stderr,"md5 file ...\n");
|
|
return -1;
|
|
}
|
|
|
|
static int do_md5(const char *path)
|
|
{
|
|
unsigned int i;
|
|
int fd;
|
|
MD5_CTX md5_ctx;
|
|
unsigned char md5[MD5_DIGEST_LENGTH];
|
|
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0) {
|
|
fprintf(stderr,"could not open %s, %s\n", path, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/* Note that bionic's MD5_* functions return void. */
|
|
MD5_Init(&md5_ctx);
|
|
|
|
while (1) {
|
|
char buf[4096];
|
|
ssize_t rlen;
|
|
rlen = read(fd, buf, sizeof(buf));
|
|
if (rlen == 0)
|
|
break;
|
|
else if (rlen < 0) {
|
|
(void)close(fd);
|
|
fprintf(stderr,"could not read %s, %s\n", path, strerror(errno));
|
|
return -1;
|
|
}
|
|
MD5_Update(&md5_ctx, buf, rlen);
|
|
}
|
|
if (close(fd)) {
|
|
fprintf(stderr,"could not close %s, %s\n", path, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
MD5_Final(md5, &md5_ctx);
|
|
|
|
for (i = 0; i < (int)sizeof(md5); i++)
|
|
printf("%02x", md5[i]);
|
|
printf(" %s\n", path);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int md5_main(int argc, char *argv[])
|
|
{
|
|
int i, ret = 0;
|
|
|
|
if (argc < 2)
|
|
return usage();
|
|
|
|
/* loop over the file args */
|
|
for (i = 1; i < argc; i++) {
|
|
if (do_md5(argv[i]))
|
|
ret = 1;
|
|
}
|
|
|
|
return ret;
|
|
}
|