nextep: Create data directory only if necessary.

[utils.git] / dumpmem.c

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ptrace.h>
#include <errno.h>

unsigned char buf[1024];

int main(int argc, unsigned char **argv)
{
    pid_t pid;
    unsigned long addr1, addr2;
    int buf;
    
    if(argc < 4)
    {
	fprintf(stderr, "Not enough args\n");
	return(1);
    }
    pid = strtol(argv[1], NULL, 0);
    addr1 = (unsigned long)strtoll(argv[2], NULL, 0);
    addr2 = (unsigned long)strtoll(argv[3], NULL, 0);
    if(ptrace(PTRACE_ATTACH, pid, NULL, NULL))
    {
	perror("PTRACE_ATTACH");
	return(1);
    }
    for(; addr1 < addr2; addr1 += sizeof(int))
    {
	errno = 0;
	if(((buf = ptrace(PTRACE_PEEKDATA, pid, (void *)addr1, NULL)) == -1) && errno)
	{
	    perror("PTRACE_PEEKDATA");
	    if(ptrace(PTRACE_DETACH, pid, NULL, NULL))
		perror("PTRACE_DETACH");
	    return(1);
	}
	if(write(1, &buf, sizeof(buf)) != 4)
	{
	    perror("write");
	    if(ptrace(PTRACE_DETACH, pid, NULL, NULL))
		perror("PTRACE_DETACH");
	    return(1);
	}
    }
    if(ptrace(PTRACE_DETACH, pid, NULL, NULL))
    {
	perror("PTRACE_DETACH");
	return(1);
    }
    return(0);
}