What do the & and | operators do in a batch file?
I'm debugging a batch file left behind by an old employee and I've come across the line:
@nmake -f makefile /E 2>&1 | tee %LOGFILEPATH%
What does this do?
I know what@nmake -f makefile /E
does and I know 开发者_高级运维what tee %LOGFILEPATH%
does, but I can't find anything on what the 2>&1 |
means.
Thanks2>&1
redirects standard error to standard out.
|
pipes the output from nmake
into tee
.
2>&1
redirects the standard error stream to standard output.
The pipe |
redirects standard output of the first command to the standard input to the second command.
So your command, bunches all output from nmake
and redirects it all to tee
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