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&2 as function parameter

51
Hi Experts,

In a UNIX shell script a function is called with the parameter &2.

f_check &2

Please help me to understand what does the above call do.
what does &2 mean there?

Thanks in Advance,
Chella
Sep 13 '07 #1
1 3083
ashitpro
542 Expert 512MB
&1 represent the file descriptor for standard output
&2 represent the file descriptor for standard error


e.g.

ls 2>&1 > temp.txt

here standard error is duplicated as standard output (2>&1)
So everything will be redirected to temp.txt

for more information see
man bash
look for redirection
or search for &1

Correct me if I am wrong
Sep 20 '07 #2

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