| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdint.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <errno.h> |
| #include <unistd.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); |
| 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; |
| } |