fdfs的疑问`

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When redirecting STDIN and STDOUT in the Bourne and Korn shells, you can omit the file descriptors 0 and 1 from the redirection symbols. You must always use the file descriptor 2 with the redirection symbol.

The 0 and 1 file descriptors are implied, and not used explicitly for the C shell, as shown in Table 16-8. The C shell representation for standard error (2) is an ampersand (&). STDERR can only be redirected when redirecting STDOUT.

[i:8ee48ac867]Table 16-8 C Shell Redirection Metacharacters [/i:8ee48ac867]
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[color=red:8ee48ac867]Description Command
Redirect STDOUT to file > file
Take input from file < file
Append STDOUT to end of file >> file
Redirect STDOUT and STDERR to file >& file
Append STDOUT and STDERR to file >>& file [/color:8ee48ac867]

laoxia 回复于：2003-11-21 07:54:37 除了0，1，2之外，您还能够人为的用exec 创建 file descriptor, 主要在写脚本时
使用

rainspruce 回复于：2003-11-21 08:52:10 佩服 ！！！

But how to use exec? documents?

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