为什么会有这篇文章，也许你会说 Mac 命令行之间 file 命令就可以知道，何必再去造一个？
原因有两个：
file无法正确识别某些 C++ 打包的游戏，这些游戏 Mach-o 的 Header 中标识了本 Mach-o 文件只有一个架构的，file命令也就很老实地只去读了第一个，导致结果只有一个架构的；（然而 AppleStore 能正确识别这些包 😂）file只有在 Mac 上能使用，Linux 没有该命令也没有类似的命令，而大部分服务器都是 Linux；
Talk is cheap， show you the code！
# -*- coding: utf-8 -*-
import os,sys
def checkMachO(path):
# print path
is_path_exists = os.path.exists(path)
if is_path_exists:
with open(path, 'rb') as f:
headMagic = ""
for i in range(0, 4):
s = f.read(1)
byte = ord(s)
headMagic = headMagic + hex(byte)[2:]
# print hex(byte)
pass
# fat:0xbebafeca 32: 0xfeedface 64: 0xfeedfacf
# print headMagic
if headMagic == "cafebabe":
# Is Fat Mach-o
# Jump 3
f.read(3)
t = f.read(1)
archiveCount = ord(t)
# Jump 8
f.read(8)
# print archiveCount
arrOffsets = []
offsetDelta = 0
# for i in range(0, archiveCount):
while 1:
offset = 0
for j in range(0, 4):
r = f.read(1)
# print ord(r)
offset = offset + ord(r) * (256 ** (3-j))
if offset == 0:
offsetDelta = 4
break;
arrOffsets.append(offset)
# print offset
# Jump 16
f.read(16)
pass
# currentOffset = 0x10 + archiveCount * 20
currentOffset = 0x10 + len(arrOffsets) * 20 + offsetDelta
msg = ""
is_32bit = 0
is_64bit = 0
# print arrOffsets
for of in arrOffsets:
delta = of - currentOffset
f.read(delta)
magic = ""
for i in range(0, 4):
s = f.read(1)
byte = ord(s)
magic = magic + hex(byte)[2:]
pass
# ap = ""
# if len(msg) > 0:
# ap = "&"
# pass
# print magic
if is_64bit == 0 and magic == "cffaedfe":
is_64bit = 1
# msg = msg + ap + "arm64"
# print "arm64"
else:
if is_32bit == 0 and magic == "cefaedfe":
is_32bit = 1
# msg = msg + ap + "arm32"
# print "arm32"
currentOffset = of + 4
if is_32bit == 1 and is_64bit == 1:
print "arm32&arm64"
else:
if is_32bit == 1:
print "arm32"
else:
if is_64bit == 1:
print "arm64"
pass
pass
# print msg
else:
if headMagic == "cffaedfe":
print "arm64"
pass
else:
if headMagic == "cefaedfe":
print "arm32"
pass
pass
pass
pass
if __name__ == '__main__':
checkMachO(sys.argv[1])
PS: 贴一个 file 无法正确识别的 ipa 地址，有兴趣的可以自己下下来试试。
-以上-