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Full Discussion: capturing exceptions from an scp clause
Top Forums Shell Programming and Scripting capturing exceptions from an scp clause Post 302601781 by Corona688 on Friday 24th of February 2012 10:56:00 AM
Old 02-24-2012
You don't need to use $? when checking a command's return value. You can check the command directly.

Code:
if ! scp source destination
then
        echo "something bad happened" >&2
fi

Or even
Code:
scp source destination || echo "something bad happened" >&2

If anything goes wrong, it will likely print an error to standard error. If you redirect standard error into a logfile yourself before you run it, all error messages will go into it.

Code:
exec 2>path/to/logfile

touch / # Since you're not root, this should print 'permission denied' into logfile

 

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LEARN ABOUT DEBIAN

logtail2

LOGTAIL(8)							  logtail2 manual							LOGTAIL(8)

NAME

       logtail2 - print log file lines that have not been read

SYNOPSIS

       logtail2 [-t] -flogfile [-ooffsetfile]

DESCRIPTION

       logtail2  reads a specified file (usually a log file) and writes to the standard output that part of it which has not been read by previous
       runs of logtail2.  It prints the appropriate number of bytes from the end of logfile, assuming that all changes that are made to it are	to
       add new characters to it.

       logfile must be a plain file.  A symlink is not allowed.

       logtail2  stores  the information about how much of it has already been read in a separate file called offsetfile.  offsetfile can be omit-
       ted.  If omitted, the file named logfile.offset in the same directory which contains logfile is used by default.

       If offsetfile is not empty, the inode of  logfile  is  checked.	 If  the  inode  is  changed,  logtail2  uses  the  heuristics	stored	in
       /usr/share/logtail/detectrotate/  to  find  a file that might be the rotated logfile and prints it starting with the stored offset. It then
       proceeds to simply print the entire new file and generates a new offsetfile.  If the inode is not changed but logfile is  shorter  than	it
       was at the last run of logtail2, it writes a warning message to the standard output.

OPTIONS

       -f     logfile to be read after offset

       -o     offsetfile stores offset of previous run

       -t     test mode - do not change offset in offsetfile

RETURN VALUES

       0      successful

       65     cannot get the size of logfile

       66     general file or directory access issue

       73     cannot write offsetfile

AUTHOR

       The original logtail was written in C by Craig H. Rowland <crowland@psionic.com>.  This version of logtail is a modification of Paul Sloot-
       man's re-implementation in perl.  enhanced by the Debian Logcheck Team <logcheck-devel@lists.alioth.debian.org>.

       This   manual   was   written   by   Oohara   Yuuma   <oohara@libra.interq.or.jp>   and	 enhanced   by	 the	Debian	  Logcheck    Team
       <logcheck-devel@lists.alioth.debian.org>..

SEE ALSO

       logcheck(8)

Debian								    28 Jul 2007 							LOGTAIL(8)
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