Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Errexit APPEARS set in subshells
Top Forums Shell Programming and Scripting Errexit APPEARS set in subshells Post 302974545 by chebarbudo on Tuesday 31st of May 2016 03:00:55 PM
Old 05-31-2016
Errexit APPEARS set in subshells
Hi there,

Everyone knows that errexit is NOT inherited by subshells. But does anyone know why errexit still appears as set with set +o?

The following example highlights the fact that errexit appears set in a subshell (set +o) even though it's actually unset (it does NOT exit with false).

Code:
$ cat /tmp/test
#!/bin/bash

set -o errexit

_f() {
        set +o | grep errexit
        false
        echo "I'm still here!"
}

_f "$@" && true
_f "$@"
$
$ bash /tmp/test
set -o errexit       <-- errexit appears set         (unexpected)
I'm still here!      <-- but it's actually unset      (expected)
set -o errexit       <-- errexit appears set          (expected)
                     <-- indeed it exited with false  (expected)

Thanks for sharing ideas.

Regards
Santiago
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Killing parent shells from subshells (KSH)

Hi all, I have a shell script which calls other shell scripts, depending on the input. Within a.sh, I have a command which calls b.sh (ie. ksh b.sh) Normally, we use the exit function to terminate a shell. However, if I choose to call exit from b.sh, I will return to the parent shell who... (4 Replies)
Discussion started by: rockysfr
4 Replies

2. UNIX for Dummies Questions & Answers

appears 4 or more time

I have a file like this: 111 AA 100.00 111 AA 200.00 TOTALS 2 300.00 111 285.00 111 ... (0 Replies)
Discussion started by: nickg
0 Replies

3. Shell Programming and Scripting

delimiter appears in field

The typical line of the input file is as follows, 123|abcde|"xyz|mn"|ghelosa|3455hello| The delimiter is |. I need to change it to another delimiter, say ~. For the above line, the output should be: 123~abcde~xyz|mn~ghelosa~3455hello~ The challenge is when | appears in a field, it... (2 Replies)
Discussion started by: derekxu
2 Replies

4. Shell Programming and Scripting

Question regarding shells and subshells when a script is run

I have the following script running with nohup on one of my servers: #!/bin/bash #\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ #set log number #i=1 #\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ #Check if log exits, if so incrememnt log number up so we don't clobber #while... (8 Replies)
Discussion started by: DeCoTwc
8 Replies

5. UNIX for Dummies Questions & Answers

print records where an ID appears more than once

Hi everyone! I have something like the following records in a file: ID: 1 Name: A Age: 23 ID: 2 Name: B ID: 1 Activity: Climbing ID: 3 Name: C ID: 3 Activity: Skating I want to capture the records where the field Age exists AND the records that have the same ID as the one... (4 Replies)
Discussion started by: Atrisa
4 Replies

6. AIX

oracle process appears to die

periodically my oracle 11.2.0.1 listener process 'tnslsnr' seems to crash and disappear ( I am using an AIX 6.1 unix platform ). When this happens I am able to restart my listener ok. However when this happens there is is no stop recorded in my listener log (as there normally would be - hence why I... (1 Reply)
Discussion started by: jimthompson
1 Replies

7. UNIX for Dummies Questions & Answers

Identifying the commands creating subshells

Hi all, This is the basic question. I have read many books which advised to avoid creating sub shells. e.g: use wc -l<filename rather than using cat file|wc -l. So, how to identify whether a command creates subshell or not? so,is it better to use tail -n+1 file in stead of using cat.... (3 Replies)
Discussion started by: pandeesh
3 Replies

8. UNIX for Dummies Questions & Answers

Understanding the concept behind subshells

Can someone post a "for dummies" explanation on how subshells work? Let's say I want to get a couple of pieces of info from the /etc/passwd file and set them as variables to be echo'd back after all data is gathered. something like for i in ${grep 5000 /etc/passwd | cut -d : -f 5}... (5 Replies)
Discussion started by: flyboynm
5 Replies

9. Shell Programming and Scripting

Export variables to subshells

So i have a script that is like this: #!/bin/sh VARA="elementary 1 elementary 2 nursery A nursery B highschool AZ" echo "${ContentOfADifferentSCRIPT}" | sh i do not have control over the script that is inside the variable "${ContentOfADifferentSCRIPT}". however, i know that the... (3 Replies)
Discussion started by: SkySmart
3 Replies

LEARN ABOUT SUSE

set_color

set_color(1)                                                           fish                                                           set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1                                                    Sun Jan 8 2012                                                      set_color(1)
All times are GMT -4. The time now is 07:22 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy