Linked Questions
48 questions linked to/from Pipe output and capture exit status in Bash
273
votes
4
answers
102k
views
Piping command output to tee but also save exit code of command [duplicate]
I have a shell script in which I wrap a command (mvn clean install), to redirect the output to a logfile.
#!/bin/bash
...
mvn clean install $@ | tee $logfile
echo $? # Does not show the return code ...
- 21.4k
10
votes
1
answer
4k
views
how to get the exit status of the first command in a pipe? [duplicate]
I made a simple script:
$ more test.bash
#!/bin/bash
echo test
exit 1
When I run the script , the exit status should be 1
$ /tmp/test.bash
echo $?
1
But when I run this as the following
/tmp/test....
- 1,712
13
votes
4
answers
5k
views
Pipe command output, but keep the error code [duplicate]
How do I get the correct return code from a unix command line application after I've piped it through another command that succeeded?
In detail, here's the situation :
$ tar -cEvhf - -I ${...
- 243
8
votes
2
answers
7k
views
Get exit code when piping into grep -v [duplicate]
I have a script like this:
#!/bin/sh
echo "hello"
echo "goodbye"
exit 1
When I run it on its own, I get the failed exit code as I expect.
$ ./fail.sh
hello
goodbye
$ echo $?
1
However, when I run ...
- 15.5k
4
votes
6
answers
1k
views
piping output through sed but retain exit status [duplicate]
I pipe the output of a long-running build process through sed for syntax-highlighting, implemented as a wrapper around "mvn".
Further I have a "monitor" script that notifies me on the desktop when ...
- 1,471
3
votes
2
answers
4k
views
How to catch mysqldump error in bash script? [duplicate]
mysqldump --verbose -h $dbhost --max_allowed_packet=1G --extended-
insert --single-transaction --add-drop-database --opt $dbname --
user=$dbusername --password=$dbpassword | gzip -1 > $filename....
- 503
1
vote
1
answer
2k
views
LInux script error return codes [duplicate]
I have the following code ..
while read copy
do
cp -v $copy | tee -a $LOGFILE
echo $?
if [[ $? -ne 0 ]]
then
echo "Error copying files. Exiting ..." | tee -a $LOGFILE
...
- 11
3
votes
2
answers
185
views
How to read return code of command when piped with another command [duplicate]
I have a bash script where I execute a command and tee to a file.
On checking the return code, it is always 0 which is for the tee <> command.
make all | tee output.log
if [[ $? -ne 0 ]]; then
...
- 305
0
votes
1
answer
395
views
How to know if a command in a pipe run successfully [duplicate]
I am trying to write a script which will download git using apt and after successful download of git I want to set the config for git. I wrote a script that does the work. But I am curious to know is ...
- 2,335
1
vote
1
answer
268
views
How to return error code when using tee in bash [duplicate]
I want to use tee to write the output of any command (first command) to a file, but I want to get the return code from the first command instead of the tee command.
Example 1: The following code will ...
- 1,798
0
votes
1
answer
318
views
Bash pipe swallows exit code when pipe like sed or tee [duplicate]
I'm using turbo feature called turbo prune which creates folder out with partial copy of my monorepo, but unfortunately that means that when running in GitHub Actions commands like turbo run lint will ...
- 10.3k
1
vote
0
answers
92
views
Get the exit code status of second to last command that was run [duplicate]
say I have a set of commands like
touch /tmp/file.json
tool test --json |& tee /tmp/file.txt
firstchar=$(head -c 1 /tmp/file.txt)
ret=$?
#begin conditions.
if ((ret==0); then
##do something
...
- 2,680
0
votes
0
answers
34
views
i have this script in nmap but he dont do what i need [duplicate]
i have this script in nmap but he dont do what i need
i need if host done off do ./2.sh
mv 1.sh ~/1sh
#!/bin/bash
count=$(nmap -sP -iL hostlist -oG pingscan | grep from* | wc -l) >>/root/host....
- 1
1
vote
0
answers
30
views
Bash command with pipe('|') alway return exit code of 0, even in error case [duplicate]
Code
a.py
import sys
import errno
def main():
try:
raise Exception("asdf")
sys.stdout.write('{"v1": "kk"}')
sys.stdout.flush()
except ...
- 5,770
1
vote
0
answers
15
views
bash, getting exit status in pipe [duplicate]
I'm running some test scripts with this command, so I can see the test output & have a log of the output. How can I access the exit status of "python test.py", or exit if "python test.py" fails
...
- 263