我正在编写一个脚本，每天为用户的主目录创建快照。首先，我使用以下方法进行空运行:
rsync -azvrn --out-format="%M %f" source/dir dest/dir
然后是实际的 rsync 操作(通过删除 -n 选项)。
我正在尝试解析试运行的输出。具体来说，我有兴趣了解 rsync 错误的确切原因(如果发生的话)。有谁知道
- 最常见的 rsync 错误及其代码？
- 综合 rsync 错误代码页的链接？
最重要的是，rsync(至少在 CentOs 5 上)不会返回错误代码。相反，它会在内部显示错误并返回 0。像这样:
sending incremental file list
rsync: link_stat "/data/users/gary/testdi" failed: No such file or directory (2)
sent 18 bytes received 12 bytes 60.00 bytes/sec
total size is 0 speedup is 0.00 (DRY RUN)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1039) [sender=3.0.6]
有没有人必须解析 rsync 错误并对如何存储 rsync 返回状态有建议？我相信，在传输多个文件时，可能会在每个文件的基础上引发错误，并在最后收集，如上面最后一行代码所示。
根据 rsync“手册”页面，这里是它可能返回的错误代码及其含义。如果您在 bash 中编写脚本，您可以查看 $?
0 Success
1 Syntax or usage error
2 Protocol incompatibility
3 Errors selecting input/output files, dirs
4 Requested action not supported: an attempt was made to manipulate 64-bit
files on a platform that cannot support them; or an option was specified
that is supported by the client and not by the server.
5 Error starting client-server protocol
6 Daemon unable to append to log-file
10 Error in socket I/O
11 Error in file I/O
12 Error in rsync protocol data stream
13 Errors with program diagnostics
14 Error in IPC code
20 Received SIGUSR1 or SIGINT
21 Some error returned by waitpid()
22 Error allocating core memory buffers
23 Partial transfer due to error
24 Partial transfer due to vanished source files
25 The --max-delete limit stopped deletions
30 Timeout in data send/receive
35 Timeout waiting for daemon connection
我从未见过全面的“最常见错误”列表，但我敢打赌错误代码 1 会位于顶部。