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Bash - trap error file not found

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# 1  
Old 02-01-2016
Bash - trap error file not found
Hello.

In bash, is there a way to trap error "file not found" when a script call another script which is not found; then abort.

Example ( part of script running with -x option set) :

Code:
+ return 0
+ RETURN_CODE=0
+ [[ 0 -eq 0 ]]
+ /root/bin/200_yast_install/00_reset_yast_install
bash: /root/bin/200_yast_install/00_reset_yast_install: No such file or directory
<--- I would like script to abort here

+ echo

+ echo

+ [[ 1 -ne 0 ]]
+ echo 'RUNNING OPENSUSE  : LEAP'
RUNNING OPENSUSE  : LEAP
+ [[ 0 -ne 0 ]]
+ echo

Any help is welcome.
# 2  
Old 02-01-2016
A trap is not necessary.
Please, add to it the following:

Code:
/root/bin/200_yast_install/00_reset_yast_install || exit 1

or add the following before executing it:
Code:
if [[ ! -x /root/bin/200_yast_install/00_reset_yast_install ]]; then
   exit 1
fi

Last edited by Don Cragun; 02-02-2016 at 12:34 AM.. Reason: Fix typo: s/instal/install/
# 3  
Old 02-06-2016
Quote:
Originally Posted by Aia
A trap is not necessary.
Please, add to it the following:

Code:
/root/bin/200_yast_install/00_reset_yast_install || exit 1

or add the following before executing it:
Code:
if [[ ! -x /root/bin/200_yast_install/00_reset_yast_install ]]; then
   exit 1
fi

Too heavy for hundreds files.
I would not use that when coding in advanced language.
This is the reason i am looking for something like TRAP.
# 4  
Old 02-06-2016
Really?
Code:
for f in /path/to/files/* ; do [ ! -x "$f" ]  && exit;done

# 5  
Old 02-06-2016
This might be a little more than you want, but have you considered using set -e? The standards describe the behavior of the shell when the set -e option is in effect as:
Code:
When this option is on, when any command fails (for any of the reasons listed in Section
2.8.1 or by returning an exit status greater than zero), the shell immediately shall exit with
the following exceptions:
    1.  The failure of any individual command in a multi-command pipeline shall not cause
        the shell to exit.  Only the failure of the pipeline itself shall be considered.
    2.  The −e setting shall be ignored when executing the compound list following the
        while, until, if, or elif reserved word, a pipeline beginning with the ! reserved word,
        or any command of an AND-OR list other than the last.
    3.  If the exit status of a compound command other than a subshell command was the
        result of a failure while −e was being ignored, then −e shall not apply to this
        command.
This requirement applies to the shell environment and each subshell environment
separately.  For example, in:
        set -e; (false; echo one) | cat; echo two
the false command causes the subshell to exit without executing echo one; however, echo
two is executed because the exit status of the pipeline (false; echo one) | cat is
zero.

# 6  
Old 02-07-2016
Did you consider the ERR trap? man bash:
Quote:
trap [-lp] [[arg] sigspec ...]
.
.
.
If a sigspec is ERR, the command arg is executed whenever a a pipeline (which may consist of a single simple command), a list, or a compound command returns a
non-zero exit status . . .
Code:
trap "echo error occurred!" ERR
ls -la dfvg
ls: cannot access dfvg: No such file or directory
error occurred!

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