[cs631apue] Question about operator and redirect

[Jan Schaumann]

Yanqiao Zhan <yzhan14 at stevens.edu> wrote:
> 1. Will there always have whitespace before and after operator(e.g & > >> |
> <)?

No.  The following are equivalent:

ls|wc>out
ls |wc >out
ls| wc     >          out

> 2. In linuxlab, I did a experiment of redirection.
> 
> yzhan14 at avatar:~$ echo "hello" > test1 > test2 > test3 > test4 > test5

You do not need to support this.  You may give an error about ambigous
redirection or emulate the behaviour observed in bash.

-Jan