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Full Discussion: error checking in bash
Top Forums Shell Programming and Scripting error checking in bash Post 302075725 by gubten on Tuesday 6th of June 2006 11:50:57 AM
Old 06-06-2006
error checking in bash
Could someone please advise on a good way to implement error checking in a script?
i am taking input from a file, iserting it's values into two commands and sending the output of each to seperate log files. i need to check those log files for for an occurance of 'error', stop the command if 'error' exists,. if it does not, then continue to next command. i have this so far....using mkdir for testing purposes.
...exerpt
for COMPONENT in `cat $1|awk '{print $1, $2}'`
do
printf "\n \n Creating components for $COMPONENT \n"
mkdir $COMPONENT >> ~/scripts/$COMPONENTERROR 2>&1
if grep error $COMPONENTERROR ! 1 || { echo "check error log"; exit 1; } fi

printf "Creating Island $2 \n"
mkdir $2 >> ~/scripts/$ISLANDERROR 2>&1
#if [stop_this -eq 1] then exit "STOP" else
#fi
done
....
or should i take another approach?
 

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LEARN ABOUT OPENDARWIN

mkdir

MKDIR(1)						    BSD General Commands Manual 						  MKDIR(1)

NAME

     mkdir -- make directories

SYNOPSIS

     mkdir [-pv] [-m mode] directory_name ...

DESCRIPTION

     The mkdir utility creates the directories named as operands, in the order specified, using mode rwxrwxrwx (0777) as modified by the current
     umask(2).

     The options are as follows:

     -m mode
	     Set the file permission bits of the final created directory to the specified mode.  The mode argument can be in any of the formats
	     specified to the chmod(1) command.  If a symbolic mode is specified, the operation characters ``+'' and ``-'' are interpreted rela-
	     tive to an initial mode of ``a=rwx''.

     -p      Create intermediate directories as required.  If this option is not specified, the full path prefix of each operand must already
	     exist.  On the other hand, with this option specified, no error will be reported if a directory given as an operand already exists.
	     Intermediate directories are created with permission bits of rwxrwxrwx (0777) as modified by the current umask, plus write and search
	     permission for the owner.

     -v      Be verbose when creating directories, listing them as they are created.

     The user must have write permission in the parent directory.

DIAGNOSTICS

     The mkdir utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     rmdir(1)

COMPATIBILITY

     The -v option is non-standard and its use in scripts is not recommended.

STANDARDS

     The mkdir utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

HISTORY

     A mkdir command appeared in Version 1 AT&T UNIX.

BSD
								 January 25, 1994							       BSD
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