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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
int hd_main(int argc, char *argv[])
{
int c;
int fd;
unsigned char buf[4096];
int res;
int read_len;
int rv = 0;
int i;
int filepos = 0;
int sum;
int lsum;
int base = -1;
int count = 0;
int repeat = 0;
do {
c = getopt(argc, argv, "b:c:r:");
if (c == EOF)
break;
switch (c) {
case 'b':
base = strtol(optarg, NULL, 0);
break;
case 'c':
count = strtol(optarg, NULL, 0);
break;
case 'r':
repeat = strtol(optarg, NULL, 0);
break;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
argv[0], optopt);
exit(1);
}
} while (1);
if (optind + 1 != argc) {
fprintf(stderr, "Usage: %s [-b base] [-c count] [-r delay] file\n", argv[0]);
exit(1);
}
fd = open(argv[optind], O_RDONLY);
if(fd < 0) {
fprintf(stderr, "could not open %s, %s\n", argv[optind], strerror(errno));
return 1;
}
do {
if(base >= 0) {
lseek(fd, base, SEEK_SET);
filepos = base;
}
sum = 0;
lsum = 0;
while(1) {
read_len = sizeof(buf);
if(count > 0 && base + count - filepos < read_len)
read_len = base + count - filepos;
res = read(fd, &buf, read_len);
if(res == 0)
break;
for(i = 0; i < res; i++) {
if((i & 15) == 0) {
printf("%08x: ", filepos + i);
}
lsum += buf[i];
sum += buf[i];
printf("%02x ", buf[i]);
if(((i & 15) == 15) || (i == res - 1)) {
printf("s %x\n", lsum);
lsum = 0;
}
}
if(res < 0) {
printf("Read error on %s, offset %d len %d, %s\n", argv[optind], filepos, read_len, strerror(errno));
return 1;
}
filepos += res;
if(filepos == base + count)
break;
}
printf("sum %x\n", sum);
if(repeat)
sleep(repeat);
} while(repeat);
return 0;
}
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