mirror of https://github.com/hsoft/collapseos.git
39 lines
859 B
C
39 lines
859 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "common.h"
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/* Read specified number of bytes in active blkdev at active offset.
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*/
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int main(int argc, char **argv)
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{
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if (argc != 3) {
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fprintf(stderr, "Usage: ./memdump device bytecount\n");
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return 1;
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}
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unsigned int bytecount = strtol(argv[2], NULL, 16);
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if (!bytecount) {
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// nothing to spit
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return 0;
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}
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int fd = open(argv[1], O_RDWR|O_NOCTTY);
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char s[0x30];
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sendcmdp(fd, "i=0");
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sprintf(s, "while i<0x%04x getb:puth a:i=i+1", bytecount);
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sendcmd(fd, s);
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for (int i=0; i<bytecount; i++) {
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read(fd, s, 2); // read hex pair
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s[2] = 0; // null terminate
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unsigned char c = strtol(s, NULL, 16);
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putchar(c);
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}
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read(fd, s, 2); // read prompt
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return 0;
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}
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