dd从bash返回0，但如果使用subprocess.run()运行，则返回错误

import subprocess

# 正确的方式：将命令和参数作为列表传递
result = subprocess.run(['dd', 'if=/dev/zero', 'of=/tmp/testfile', 'bs=1M', 'count=1'], capture_output=True, text=True)

print("Return code:", result.returncode)
print("stdout:", result.stdout)
print("stderr:", result.stderr)

import subprocess

# 使用 sudo 运行 dd 命令
result = subprocess.run(['sudo', 'dd', 'if=/dev/zero', 'of=/tmp/testfile', 'bs=1M', 'count=1'], capture_output=True, text=True)

print("Return code:", result.returncode)
print("stdout:", result.stdout)
print("stderr:", result.stderr)

import subprocess
import os

# 使用当前环境变量运行 dd 命令
result = subprocess.run(['dd', 'if=/dev/zero', 'of=/tmp/testfile', 'bs=1M', 'count=1'], capture_output=True, text=True, env=os.environ)

print("Return code:", result.returncode)
print("stdout:", result.stdout)
print("stderr:", result.stderr)

import subprocess

result = subprocess.run(['dd', 'if=/dev/zero', 'of=/tmp/testfile', 'bs=1M', 'count=1'], capture_output=True, text=True)

print("Return code:", result.returncode)
print("stdout:", result.stdout)
print("stderr:", result.stderr)

import subprocess

result = subprocess.run(['dd', 'if=/dev/zero', 'of=/tmp/testfile', 'bs=1M', 'count=1'], capture_output=True, text=True)

if result.returncode != 0:
    print("Error running dd command:")
    print(result.stderr)
else:
    print("dd command ran successfully")
    print(result.stdout)