1、How to redirect stderr and stdout to different files in the same line of bash? http://stackoverflow.com/questions/7901517/how-to-redirect-stderr-and-stdout-to-different-files-in-the-same-line-of-bash
1: int save_out = dup(fileno(stdout));//backup stdout 2: int out = open("cout.log", O_RDWR|O_CREAT|O_APPEND, 0600); 3: int nRet; 4: fflush(stdout); 5: dup2(out, fileno(stdout));// redirect stdout to out 8: printf("Hello world!"); 10: fflush(stdout);close(out);...
默认情况下, STDERR 文件描述符会和 STDOUT 文件描述符指向同样的地方(尽管分配给它们的文件描述符值不同)。也就是说,默认情况下,错误消息也会输出到显示器输出中。 但从上面的例子可以看出, STDERR 并不会随着 STDOUT 的重定向而发生改变。使用脚本时,你常常会想改变这种行为,尤其是当你希望将错误消息保存到日...
Bash has no shorthand syntax that allows piping only StdErr to a second command, which would be needed here in combination with tee again to complete the table. If you really need something like that, please look at "How to pipe stderr, and not stdout?" on Stack Overflow for some ways...
首先,我们将stdout重定向到ls-output.txt文件,然后用2>&1的符号将文件描述符2stderr重定向到文件描述符1stdout中。 需要注意重定向的顺序,重定向stderr必须总是在重定向stdout之后发生。 最近版本的bash提供了第二种方法,该方法让执行这种组合重定向更精简。
从系统编程的角度来理解,输出重定向"command > file"就是:command命令输出数据,向stdout或stderr输出(write)数据,Linux Shell把这些数据重新定向(open)输出(write)到file文件中。也就是说:输出重定向就是对stdout或stderr进行重定向。而输入重定向“command < file”,则是把Linux Shell把文件打开(open)...
1代表stdout标准输出 2代表stderr标准错误 所以,cmd > file实际上是缩略了的写法,理解起来,应该是cmd &1> file,也就是只把标准输出转出去。 那么同理,只把标准错误转出去,就应该是cmd &2> file。 其中,&符号没任何实际意义,只是以至区分,代表后面的符号是要设置重定向用的,而不是某个文件的名字。
Example 4: Use of Stderr 原文 How to Use the Stdin, Stderr, and Stdout Streams in Bash – ...
Every command we run in Linux would either give output or throw an error. Sometimes we want the errors to be redirected into an output channel or you may want to redirect the STDERR to one file and STDOUT to a different file You might have come across these two words often STDOUT and ...
-b, --cookie STRING/FILE String or file to read cookies from (H) -c, --cookie-jarFILE Write cookies to this file after operation (H) --create-dirs Create necessary local directoryhierarchy--crlf Convert LF to CRLF in upload --crlfile FILE Get a CRL list in PEM format from the give...