如何制作启动 Python 脚本的 linux 后台进程(在 c 中）

我做了一个Linux后台进程(用c ++(，它监视一个目录，并在某个文件出现在该目录中时尝试启动Python脚本。我的问题是负责启动 Python 脚本的子进程在调用 execvp 函数后立即退出，我不明白为什么。所有必要的文件都在root的所有权下。如果有帮助，这是我的代码。提前感谢您的任何指示！我已经在代码中标记了错误发生错误的位置。我还包含了要调用的 Python 脚本

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
using namespace std;
char* arguments[3];
FILE* fd;
const char* logFilePath = "/home/BluetoothProject/Logs/fileMonitorLogs.txt";
char* rfcommPath = (char*)"/home/BluetoothProject/RFCOMMOut.py";
void logToFile(const char*);
void doWork();
void logToFile(const char* str) {
fd = fopen(logFilePath, "a");
fprintf(fd, "%sn", str);
fclose(fd);
}
int main() {
arguments[0] = (char*)"python";
arguments[1] = rfcommPath;
arguments[2] = NULL;
pid_t pid = fork();
if(pid < 0) {
printf("Fork failed");
exit(1);
} else if(pid > 0) {
exit(EXIT_SUCCESS);
}
umask(0);
pid_t sid = setsid();
if(sid < 0) {
logToFile("setsid() didn't work.");
exit(1);
}
if ((chdir("/")) < 0) {
logToFile("chdir() didn't work.");
exit(EXIT_FAILURE);
}
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
doWork();
}
void doWork() {
pid_t pid = fork();
if(pid < 0) {
logToFile("doWork() fork didn't work.");
} else if(pid > 0) {
int status = 0;
waitpid(pid, &status, 0);
if(WEXITSTATUS(status) == 1) {
logToFile("Child process exited with an error.");
}
} else {
int error = execvp(arguments[0], arguments);   //Here is where the error is
if(error == -1) {
logToFile("execvp() failed.");
}
exit(1);
}
}

Python 脚本(又名 RFCOMMOut.py(

import RPi.GPIO as gpio
import serial
led_state = 0
led_pin = 11
gpio.setmode(gpio.BOARD)
gpio.setwarnings(False)
gpio.setup(led_pin, gpio.OUT)
try:
ser = serial.Serial(port = '/dev/rfcomm0',
baudrate = 9600,
parity = serial.PARITY_NONE,
stopbits = serial.STOPBITS_ONE,
bytesize = serial.EIGHTBITS)
except IOException as e:
logFile = open("/home/BluetoothProject/Logs/fileMonitorLogs.txt", "a")
logFile.write("(First error handler) There was an exception:n")
logFile.write(str(e))
logFile.write("n")
logFile.close()
#gpio.output
def process_input(input):
global led_state
if input == "I have been sent.n":
if led_state == 1:
led_state = 0
gpio.output(led_pin, led_state)
else:
led_state = 1
gpio.output(led_pin, led_state)
while True:
try:
transmission = ser.readline()
process_input(transmission)
except IOError as e:
logFile = open("/home/BluetoothProject/Logs/fileMonitorLogs.txt", "a")
logFile.write("(second error handler) There was an exception:n")
logFile.write(str(e))
logFile.write("n")
logFile.close()
break
led_state = 0
gpio.output(led_pin, led_state)
gpio.cleanup()
print("End of programn")