问题描述
如何在 OSX 中运行此命令?
How can I run this command in OSX?
dd if=mybackup.ab bs=24 skip=1|openssl zlib -d >mybackup.tar
运行时出现以下错误
$ dd if=mybackup.ab bs=24 skip=1|openssl zlib -d > mybackup.tar
dd: mybackup.ab: No such file or directory
openssl:Error: 'zlib' is an invalid command.
Standard commands
asn1parse ca ciphers crl crl2pkcs7
dgst dh dhparam dsa dsaparam
ec ecparam enc engine errstr
gendh gendsa genrsa nseq ocsp
passwd pkcs12 pkcs7 pkcs8 prime
rand req rsa rsautl s_client
s_server s_time sess_id smime speed
spkac verify version x509
Message Digest commands (see the `dgst' command for more details)
md2 md4 md5 mdc2 rmd160
sha sha1
Cipher commands (see the `enc' command for more details)
aes-128-cbc aes-128-ecb aes-192-cbc aes-192-ecb aes-256-cbc
aes-256-ecb base64 bf bf-cbc bf-cfb
bf-ecb bf-ofb cast cast-cbc cast5-cbc
cast5-cfb cast5-ecb cast5-ofb des des-cbc
des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb
des-ede-ofb des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb
des-ofb des3 desx rc2 rc2-40-cbc
rc2-64-cbc rc2-cbc rc2-cfb rc2-ecb rc2-ofb
rc4 rc4-40 rc5 rc5-cbc rc5-cfb
rc5-ecb rc5-ofb seed seed-cbc seed-cfb
seed-ecb seed-ofb
推荐答案
Mac 上的 Openssl 是在没有 zlib 支持的情况下编译的.本文中描述的替代方法适用于我的优胜美地:
Openssl on mac is compiled without zlib support. Alternative method described in this article works on my Yosemite:
dd if=backup.ab bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.write(zlib.decompress(sys.stdin.read()))" | tar -xvf -
可选，如果您只想将其转换为 tar 存档:
Optionaly, if you just want to convert it into tar archive:
dd if=backup.ab bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.write(zlib.decompress(sys.stdin.read()))" > backup.tar
它会跳过 Android 标头的前 24 个字节，然后解压缩 zlib 数据.
It skips first 24 bytes of Android header and then uncompresses zlib data.