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Catching error codes in a shell pipe
...[12]; exit 1' when any of the signals 1 SIGHUP, 2 SIGINT, 3 SIGQUIT, 13 SIGPIPE, or 15 SIGTERM occur, or 0 (when the shell exits for any reason).
If you're writing a shell script, the final trap only needs to remove the trap on 0, which is the shell exit trap (you can leave the other signals in plac...
Detect if stdin is a terminal or pipe?
... printf( "stdin is a terminal\n" );
else
printf( "stdin is a file or a pipe\n");
(On windows they're prefixed with underscores: _isatty, _fileno)
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Force line-buffering of stdout when piping to tee
...he line to be printed instantly. This does not appear to hold when using a pipe to redirect to tee .
6 Answers
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Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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参数：minimal_backoff_time
说明：用于设定队列处理程序对无法投递的邮件的最短巡回时间。缺省为1000秒。
例 如：minimal_backoff_time= 1000
最长投递失败周期
参数：maximal_backoff_time
说 明：用于设定队列处理程序对无法投递的邮件...
How to call a shell script from python code?
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With subprocess you can manage input/output/error pipes. It is also better when you have many arguments -- with os.command() you will have to create whole command line with escaping special characters, with subprocess there is simple list of arguments. But for simple tasks o...
How to create streams from string in Node.Js?
...ow
s.push('your text here');
s.push(null);
… after which you can freely pipe it or otherwise pass it to your intended consumer.
It's not as clean as the resumer one-liner, but it does avoid the extra dependency.
(Update: in v0.10.26 through v9.2.1 so far, a call to push directly from the REPL pro...
一文讲透区块链技术原理 - 资讯 - 清泛网 - 专注C/C++及内核技术
...够保持完整性、连续性和一致性，即使部分参与人作假也无法改变区块链的完整性，更无法篡改区块链中的数据。区块链技术涉及的关键点包括：去中心化（Decentralized）、去信任（Trustless）、集体维护（Collectively maintain）、可...
How to trick an application into thinking its stdout is a terminal, not a pipe
I'm trying to do the opposite of " Detect if stdin is a terminal or pipe? ".
9 Answers
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How to escape a pipe char in a code statement in a markdown table?
...e containing pieces of code in Markdown. It works fine except when I put a pipe char (i.e. | ) between the backtick (i.e. ` ) chars.
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How do I pipe or redirect the output of curl -v?
...s is still displayed on the console. Is there some other stream that I can pipe into grep to extract some data that I need?
– jonderry
Mar 25 '11 at 3:51
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