Question

I want to invoke a shell in C program by execve:

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

main()
{
        char* path = "/bin/sh";
        int err = execve(path, &path, NULL);
        printf("%d\n", err);
        printf("%s\n", strerror(errno));
        printf("%x, %x\n", path, &path);
}

However the output is:

-1
Bad address
80485c0, bf816f4c

Answer 1

Because you aren’t sending a NULL terminated list of arguments.
You need:

char* path[2];
path[0] = "/bin/sh";
path[1] = NULL;
int err = execve(path[0], path, NULL);