在已知PID的不同进程中为bash设置陷阱

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

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

    pid_t pid = atoi(argv[1]);

    if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) == -1) {
        perror("ptrace attach");
        return 1;
    }

    int status;
    waitpid(pid, &status, 0);

    ptrace(PTRACE_CONT, pid, NULL, NULL);

    return 0;
}