clog | 易学教程

How to redefine both cerr and clog to both tee to a shared log file?

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问题 A related question here shows how to do this with just clog: How to redefine clog to tee to original clog and a log file? The question now is how to also do this for cerr at the same time. With the above question, output to cerr does not end up in the log file where it is also needed. The goal is that whatever goes to either clog or cerr ends up in the log file once, so both clog and cerr need to be teed to a shared log file. 回答1: this code will redirect both std::cout and std::cerr to an

How to redefine both cerr and clog to both tee to a shared log file?

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Sakai 10 clog not compiling :(

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问题 I'm having a little trouble on compiling the clog tool for sakai 10... https://github.com/adrianfish/clog/issues/5 I suspect adrian is busy on the 11 build at the moment, but I'm wondering if it's actually something that can be fixed by the user, or maybe others have hit this and are doing something simple that I don't know about..? Basically the current stable version of clog (0.9.3 -https://confluence.sakaiproject.org/display/CLOG/Home) doesn't compile for the sakai 10 code base, there is

Redirect C++ std::clog to syslog on Unix

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问题 I work on Unix on a C++ program that send messages to syslog. The current code uses the syslog system call that works like printf. Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog . But clog merely redirect output to stderr, not to syslog and that is useless for me as I also use stderr and stdout for other purposes. I've seen in another answer that it's quite easy to redirect it to a file using rdbuf() but I see no way to apply that method to call

Redirect C++ std::clog to syslog on Unix

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I work on Unix on a C++ program that send messages to syslog. The current code uses the syslog system call that works like printf. Now I would prefer to use a stream for that purpose instead, typically the built-in std::clog . But clog merely redirect output to stderr, not to syslog and that is useless for me as I also use stderr and stdout for other purposes. I've seen in another answer that it's quite easy to redirect it to a file using rdbuf() but I see no way to apply that method to call syslog as openlog does not return a file handler I could use to tie a stream on it. Is there another

What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?

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I tried researching the difference between cout , cerr and clog on the internet but couldn't find a perfect answer. I still am not clear on when to use which. Can anyone explain to me, through simple programs and illustrate a perfect situation on when to use which one? I visited this site which shows a small program on cerr and clog , but the output obtained over there can also be obtained using cout . So, I'm confused over each one's exact use. riv stdout and stderr are different streams, even though they both refer to console output by default. Redirecting (piping) one of them (e.g. program

How to redefine clog to tee to original clog and a log file?

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问题 I saw a useful start here: http://www.cs.technion.ac.il/~imaman/programs/teestream.html And it works great to make a new stream which goes to both clog and a log file. However, if I try to redefine clog to be the new stream it does not work because the new stream has the same rdbuf() as clog so the following has no effect: clog.rdbuf(myTee.rdbuf()); So how can I modify the tee class to have its own rdbuf() which can then be the target of clog? Thanks. -William 回答1: If you really want to keep

What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?

阅读更多关于 What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?

问题 I tried researching the difference between cout , cerr and clog on the internet but couldn't find a perfect answer. I still am not clear on when to use which. Can anyone explain to me, through simple programs and illustrate a perfect situation on when to use which one? I visited this site which shows a small program on cerr and clog , but the output obtained over there can also be obtained using cout . So, I'm confused over each one's exact use. 回答1: stdout and stderr are different streams,