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Top Forums Shell Programming and Scripting Killing a bash process and running the second part of script Post 302915346 by newbie2010 on Tuesday 2nd of September 2014 11:50:32 AM
Old 09-02-2014
Killing a bash process and running the second part of script

I want to run a script that calls remote ssh and if it gets hung, I want to be able to kill that part of the script and run another command in the script

for example I have a statement like this:

Code:
if [[ $nbserve == SENDone || $nbserve == Zray|| $nbserve == Partition ]]; 
then 
    export tapes=$(for tape in $(su - nacct -c 'ssh remote1 "cat /filer/cart/vol0/tech/File\ Lists/'"$nbserve"'/'"$move"'"'| gawk '{print $1}'|sed -n '/\([0-9]\)\(.*\)/p'); 
    do echo $cartridge;done);
else 
    export cartridges=$(for cartridge in $(su - nbacct -c 'ssh remote1 "cat /filer/cart/vol0/techFile\ Lists/'"$nbserve"'/'"$movelist"'"'| tr -d " \t" |sed -n 's/\(.*)\)\([A-Z]\{1,3\}[0-9]\{1,5\}\)\(.*\)/\2/p'); 
    do echo $cartridge;done);
fi


90% of the time this command works, but sometimes the nbserv name is not accessible this way (by ssh). In that case, I'd like to run another command that uses another syntax.


Is there a way to terminate the above statement if it hangs, and then proceed to move to the next portion of the script to run another command?
Something like a kill process command. But then how would the script go to another line? Is it possible?

Last edited by vbe; 09-02-2014 at 12:56 PM.. Reason: No colour please! - Please send code properly formatted!
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-k] [-q] [-t time] [file [command ...]] DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. If the argument command ... is given, script will run the specified command with an optional argument vector instead of an interactive shell. Options: -a Append the output to file or typescript, retaining the prior contents. -k Log keys sent to program as well as output. -q Run in quiet mode, omit the start and stop status messages. -t time Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The default interval is 30 seconds. The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues. When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual echo logging. This does not work when in a raw mode where the program being run is doing manual echo. BSD
June 6, 1993 BSD
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