Shell script stdout, stderr and stdin

solo9300 · 12-26-2009, 02:11 PM

Hello all,
what i am try to do is control stdout, stderr and stdin.

For example:

Shell Script File:

Code:

     wget http://ufpr.dl.sourceforge.net/sourceforge/pyxml/PyXML-0.8.4.tar.gz >> MyLogFile
     tar xvfz PyXML-0.8.4.tar.gz >> MyLogFile
     cd PyXML-0.8.4 >> MyLogFile
     python setup.py install >> MyLogFile

when run the script i want to
print stdin
print stderr like this "Error: stderr"
don't print stdout

and save all stdout, stderr and stdin to MyLogFile

Any help would be much appreciated.

deepinlife · 12-27-2009, 12:17 AM

Code:

./script &> log

will output the stdrr and stdout but for the stdin?

solo9300 · 12-28-2009, 12:54 AM

Quote:

Originally Posted by deepinlife

Code:

./script &> log

will output the stdrr and stdout but for the stdin?

and if i want to print the error between [PrintTheError]

deepinlife · 12-28-2009, 01:51 AM

Quote:

Originally Posted by solo9300

and if i want to print the error between [PrintTheError]

i can't understand what do u mean ?
all error logged to stdrr will be redirected to file log

solo9300 · 12-28-2009, 02:39 PM

Quote:

Originally Posted by deepinlife

i can't understand what do u mean ?
all error logged to stdrr will be redirected to file log

what i mean is to write to a log file yes, pluss print a msg to the terminal saying there was an error + the error

echo "there is an Error $stderr"

konsolebox · 12-28-2009, 11:06 PM

try this one

Code:

#!/bin/bash

exec 2>&-
exec 2> >(while read LINE; do echo "Error: $LINE"; done)

<commands here>

exec 2>&-
exec 2>/dev/stderr || exec 2>/dev/fd/2    # optional

you'll need bash >=2.05 to run the script

---- edit ----

another variation:

Code:

{
    <commands here>
} 2> >(while read LINE; do echo "Error: $LINE"; done)

solo9300 · 12-29-2009, 12:33 AM

Quote:

Originally Posted by konsolebox

try this one

Code:

{
    <commands here>
} 2> >(while read LINE; do echo "Error: $LINE"; done)

work grate thax