假设我有一个命令
现在，我想将此的STDOUT和STDERR重定向到一个单一流中，这样它就像bash中的
`echo hello`
现在，我想将此的STDOUT和STDERR重定向到一个单一流中，这样它就像bash中的
2>&1。我看到了两个Julia问题，但仍然不明白它在Julia v.0.4中应该如何工作。
1个回答
9
请查看pipeline的帮助文档，特别是:
run(pipeline(`echo hello`, stdout=STDOUT, stderr=STDOUT))
这将同时重定向到同一个流（进程 STDOUT）。也可以是其他东西。
以下是 REPL 可以提供的帮助：
help?> pipeline
search: pipeline
pipeline(command; stdin, stdout, stderr, append=false)
Redirect I/O to or from the given command. Keyword arguments specify which
of the command's streams should be redirected. append controls whether file
output appends to the file. This is a more general version of the 2-argument
pipeline function. pipeline(from, to) is equivalent to pipeline(from,
stdout=to) when from is a command, and to pipeline(to, stdin=from) when from
is another kind of data source.
Examples:
run(pipeline(`dothings`, stdout="out.txt", stderr="errs.txt"))
run(pipeline(`update`, stdout="log.txt", append=true))
pipeline(from, to, ...)
Create a pipeline from a data source to a destination. The source and
destination can be commands, I/O streams, strings, or results of other
pipeline calls. At least one argument must be a command. Strings refer to
filenames. When called with more than two arguments, they are chained
together from left to right. For example pipeline(a,b,c) is equivalent to
pipeline(pipeline(a,b),c). This provides a more concise way to specify
multi-stage pipelines.
Examples:
run(pipeline(`ls`, `grep xyz`))
run(pipeline(`ls`, "out.txt"))
run(pipeline("out.txt", `grep xyz`))
此外，您应该升级至至少Julia 0.5。0.4不再受支持，而0.6即将发布。
- Fengyang Wang
3
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原文链接
?。 - Fengyang Wang