CODEWITHSUNDEEP
bashshellstdoutstderrio-redirection
serilain
serilain

Reputation: 451

How do I redirect stdout/stderr when also using the input redirection operator `<`?

I have a bash script that does this:

#!/bin/bash
# $1 = database dump
# $2 = mysql connect command
$2 < $1

And that last part prints output to stdout & stderr that I don't want. However, I don't know how best to do a > /dev/null 2>&1 style redirect because of how I'm already doing an input redirection.

Upvotes: 1

Views: 121

Answers (1)

Ronan Boiteau
Ronan Boiteau

Reputation: 10138

The order does not matter. You can put < "$1" before or after >/dev/null 2>&1:

  • "$2" < "$1" >/dev/null 2>&1
  • "$2" >/dev/null 2>&1 < "$1"

As Charles Duffy pointed out, don't forget to put your $1 and $2 variables inside quotes.

Upvotes: 3

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