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Full Discussion: Weird Exit Status of shell script
Top Forums Shell Programming and Scripting Weird Exit Status of shell script Post 302810441 by Ray Sun on Tuesday 21st of May 2013 09:19:16 PM
Old 05-21-2013
Weird Exit Status of shell script
I have a script named check which will read the content of a file and check wether those files exist in the current directory. If so it will have the exit status of 0, otherwise it will have 1.
check script:
Code:
#!/bin/bash
if [ $# -lt 1 ] ; then #Check there is enough command line parameters.
        exit 1
fi

cat $1 | while read i; do #Check whether there is missing file
        `[ -e $i ]`
        if [ $? != 0 ] ; then
                exit 1
        fi
done

exit 0

Now I have a file named suite.txt whose content is
Code:
test1
test2
test3

In current directory, there are only test1 and test2 exist, however, test3 doesn't.
When executing
Code:
./check suite.txt; echo $?

It gave the 0 which means that there was no missing files. I feel so confused about that. Any ideas?
Thanks in advance!
 

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LEARN ABOUT DEBIAN

bup-restore

bup-restore(1)						      General Commands Manual						    bup-restore(1)

NAME

       bup-restore - extract files from a backup set

SYNOPSIS

       bup restore [--outdir=outdir] [-v] [-q]

DESCRIPTION

       bup restore extracts files from a backup set (created with bup-save(1)) to the local filesystem.

       The specified paths are of the form /branch/revision/path/to/file.  The components of the path are as follows:

       branch the name of the backup set to restore from; this corresponds to the --name (-n) option to bup save.

       revision
	      the  revision of the backup set to restore.  The revision latest is always the most recent backup on the given branch.  You can dis-
	      cover other revisions using bup ls /branch.

       /path/to/file
	      the original absolute filesystem path to the file you want to restore.  For example, /etc/passwd.

       Note: if the /path/to/file is a directory, bup restore will restore that directory as well as recursively restoring all its contents.

       If /path/to/file is a directory ending in a slash (ie.  /path/to/dir/), bup restore will restore the children of that directory directly to
       the  current directory (or the --outdir).  If the directory does not end in a slash, the children will be restored to a subdirectory of the
       current directory.  See the EXAMPLES section to see how this works.

OPTIONS

       -C, --outdir=outdir
	      create and change to directory outdir before extracting the files.

       -v, --verbose
	      increase log output.  Given once, prints every directory as it is restored; given twice, prints every file and directory.

       -q, --quiet
	      don't show the progress meter.  Normally, is stderr is a tty, a progress display is printed that shows the  total  number  of  files
	      restored.

EXAMPLE

       Create a simple test backup set:

	      $ bup index -u /etc
	      $ bup save -n mybackup /etc/passwd /etc/profile

       Restore just one file:

	      $ bup restore /mybackup/latest/etc/passwd
	      Restoring: 1, done.

	      $ ls -l passwd
	      -rw-r--r-- 1 apenwarr apenwarr 1478 2010-09-08 03:06 passwd

       Restore the whole directory (no trailing slash):

	      $ bup restore -C test1 /mybackup/latest/etc
	      Restoring: 3, done.

	      $ find test1
	      test1
	      test1/etc
	      test1/etc/passwd
	      test1/etc/profile

       Restore the whole directory (trailing slash):

	      $ bup restore -C test2 /mybackup/latest/etc/
	      Restoring: 2, done.

	      $ find test2
	      test2
	      test2/passwd
	      test2/profile

SEE ALSO

       bup-save(1), bup-ftp(1), bup-fuse(1), bup-web(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															    bup-restore(1)
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