Csh Catch Error
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of shell script error handling this site About Us Learn more about Stack Overflow the company Business
Bash Trap Error
Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask bash script trap Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign
Bash Script Ignore Error Continue
up How to catch errors or exceptions in Csh? up vote 1 down vote favorite I would like to know if there is a way to catch the exceptions and control the flow when this happen. For example running this line, I would like to know if a shell error occurred . source /scripts/scriptThatWillFail.csh linux shell csh share|improve this question asked Jul 3 ksh error handling '15 at 19:54 Leo 7711224 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted The exit/return code is stored in the status variable in C shell. source /scripts/scriptThatWillFail.csh if ($status != 0) then echo failed else echo passed endif share|improve this answer edited Jul 9 '15 at 22:32 answered Jul 3 '15 at 20:01 Eugeniu Rosca 4,027528 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged linux shell csh or ask your own question. asked 1 year ago viewed 217 times active 1 year ago Related 219Can a shell script set environment variables of the calling shell?580How to set a variable equal to the output from a command in Bash?0What does the -b argument do in csh?3csh inline math2How to run a
`sh bash catch error message -c 'ls dyd_* 2> /dev/null' ` set if_errorexits = `echo$errors | awk '{print http://stackoverflow.com/questions/31213467/how-to-catch-errors-or-exceptions-in-csh length($0)}' ` if ( $if_errorexits == 0) then echo "the command does not work" exit 1 endif Publié par Xw Fave à 02:47 Libellés : csh http://xwfaivre.blogspot.com/2012/03/stderr-in-csh-how-to-catch-errors-in.html Aucun commentaire: Enregistrer un commentaire Article plus récent Article plus ancien Accueil Inscription à : Publier les commentaires (Atom) Libellés awk (10) backup (1) bash (30) climate (1) compilation (7) csh (36) editor(emacs and vi...) (5) electronics (2) emacs (4) enviroment (2) fortran (6) gnuplot (4) harddrive (2) latex (10) linux (60) mac (1) mac os (4) oneline_tools (1) optimisation (1) python (23) regression and statistics (1) remotesensing (1) sed (9) shell (4) tcsh (5) Qui êtes-vous ? Xw Fave Afficher mon profil complet Modèle Simple. Fourni par Blogger.
Scripting Unix shell scripting - KSH, CSH, SH, BASH, PERL, PHP, SED, AWK and shell scripts and shell scripting languages here. Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... unix and linux operating commands For http://www.unix.com/shell-programming-and-scripting/43123-loop-statement-catch-error.html loop statement - catch error Shell Programming and Scripting Thread Tools Search this Thread Display Modes #1 09-19-2007 lumdev Registered User Join Date: Sep 2006 Last Activity: 4 May 2010, 10:51 AM https://bima.astro.umd.edu/checker/node22.html EDT Location: Belgium Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts For loop statement - catch error I'm having a question about for loops. (bash) I have the following for example: for file in `ls *.txt` do read file ... shell script done Now when there is a file present there is no problem, now when there is no file present I get the following output in my standard mail box : "No such file or directory" Script is executed via crontab. Now I want to catch the above error so I don't get it in my mail any more, but I have no idea how to do this. I can make an if statement first "if [ -f *.txt ] ...", but there must be a in shell script better solution. Thx. Remove advertisements Sponsored Links lumdev View Public Profile Find all posts by lumdev #2 09-19-2007 ajcannon Registered User Join Date: Aug 2007 Last Activity: 19 November 2008, 10:48 AM EST Location: Binfield, Berkshire. UK Posts: 91 Thanks: 0 Thanked 0 Times in 0 Posts if I think the use of the 'if' statement is a perfectly reasonable solution. You need some kind if conditional statement to determine whether or not your file exists and an 'if' would be OK Remove advertisements Sponsored Links ajcannon View Public Profile Find all posts by ajcannon #3 09-19-2007 porter Registered User Join Date: Jan 2007 Last Activity: 8 January 2008, 6:50 PM EST Posts: 2,965 Thanks: 0 Thanked 5 Times in 5 Posts Quote: Originally Posted by lumdev I can make an if statement first "if [ -f *.txt ] ...", but there must be a better solution. Check for the actual file in the loop Code: for file in *.txt do if test -f $file then read file ... fi done porter View Public Profile Find all posts by porter #4 09-19-2007 cfajohnson Shell programmer, author Join Date: Mar 2007 Last Activity: 11 July 2016, 2:55 PM EDT Location: Toronto, Canada Posts: 2,898 Thanks: 0 Thanked 134 Times in 118 Posts Quote: Originally Posted by lumdev I'm having a question about for loops. (bash) I have the following for example: for file in `ls *.txt` That is n
yourself on the commandline (quite similar in concept to command files under VMS or batch files under MSDOS). In addition, most UNIX shells have the capability of command flow logic ( goto, if/then/else/endif etc.), retrieving the command line parameters, defining and using (shell) variables etc. Under the UNIX environment one can also choose which shell to use, although we shall only give examples in the most commonly used shell, the C-shell (csh). As an example, we will show a shell script which copies all files from one directory to a new one, also creating that new directory. The new directory must not exist yet, otherwise the script will fail with an error message. It's usage would look like: % csh -f scriptname dir1 dir2 or shorter: % scriptname dir1 dir2 The second form, in which the script is not told through which shell it should process its commands, is the recommended practice. The first line of this script file must then contain the magic line #! /bin/csh -f to denote the script is to be run via the C-shell, which on standard UNIX systems is located in /bin/csh. In this case the script also needs to be made executable, i.e. % chmod +x scriptname In effect your operating system will then issue the first form of the command, The second form has the advantage that you don't have to remember which shell to use, and in the end saves a few keystrokes, always considered a big issue in UNIX! Now lets look at the full text of the script first: #! /bin/csh -f # # Example of a shell script to copy all files from one directory # to another. The input directory must not contain any subdirectories, # and it will not copy any so-called (hidden) dot-files. # ## check if called properly if ($#argv != 2) then echo "Usage: $0 dir1 dir2" echo "copies all files from one directory to another" goto done endif ## save command line args in variables set dir1=$1 set dir2=$2 ## check if dir1 indeed is an existing dir if (! -d $dir1) then echo "$dir1 is not a directory" ; exit 1 endif ## check if dir2 does not exist if (-e $dir2) then echo "$dir2 already exists" ; exit 1 endif ## create new dir2 mkdir $dir2 if ($status != 0) goto error ## loop through all files in dir1 foreach file ($dir1/*) if (-d $file) then echo "Skipping $file (is a directory)" else echo "Copying $file" cp $file $dir2 endif end ## Labels to jump to exit OK (done) or not OK (error) done: exit 0 error: exit 1 A few things can be noted: Comments are lines that start with a #, but the first line of the script must contain this strange construction "#! /bin/csh -f" to tell it how to execute itsel