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Strange output from grep
Post 57656 by Bab00shka on Thursday 4th of November 2004 09:48:57 AM
11-04-2004
Strange output from grep
Hi,
I am getting different output for grep depending which directory I am in.
The following is a transcript of my session, I am using egrep but have also used grep -E. The directory names have been changed for security:
$pwd
/dir1/dir2/dir3/dir4
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
$echo $?
1
$cd ..
$pwd
/dir1/dir2/dir3
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
000000
$echo $?
0
$cd ..
$pwd
/dir1/dir2
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
$echo $?
1
$
It appears the output from egrep when run in directory /dir1/dir2/dir3 is the opposite of what I would expect
/dir1/dir2/dir3 and /dir1/dir2/dir3/dir4 are on the same volume.
I have checked and there is only one instance of egrep on the whole server.
The permissions of the directories are as follows
drwxr-xr-x /dir1/dir2
drwxrwxrwx /dir1/dir2/dir3
drwxr-xr-x /dir1/dir2/dir3/dir4
We can't work out why this is happening. Can anyone help?
Many thanks
Helen
I am getting different output for grep depending which directory I am in.
The following is a transcript of my session, I am using egrep but have also used grep -E. The directory names have been changed for security:
$pwd
/dir1/dir2/dir3/dir4
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
$echo $?
1
$cd ..
$pwd
/dir1/dir2/dir3
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
000000
$echo $?
0
$cd ..
$pwd
/dir1/dir2
$echo 000000 |egrep -v [0-1][0-9][0-5][0-9][0-5][0-9]
$echo $?
1
$
It appears the output from egrep when run in directory /dir1/dir2/dir3 is the opposite of what I would expect
/dir1/dir2/dir3 and /dir1/dir2/dir3/dir4 are on the same volume.
I have checked and there is only one instance of egrep on the whole server.
The permissions of the directories are as follows
drwxr-xr-x /dir1/dir2
drwxrwxrwx /dir1/dir2/dir3
drwxr-xr-x /dir1/dir2/dir3/dir4
We can't work out why this is happening. Can anyone help?
Many thanks
Helen
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dircmp
dircmp(1) General Commands Manual dircmp(1) NAME
dircmp - directory comparison SYNOPSIS
n] dir1 dir2 DESCRIPTION
examines dir1 and dir2 and generates various tabulated information about the contents of the directories. Sorted listings of files that are unique to each directory are generated for all the options. If no option is entered, a sorted list is output indicating whether the filenames common to both directories have the same contents. Compare the contents of files with the same name in both directories and output a list telling what must be changed in the two files to bring them into agreement. The list format is described in diff(1). Suppress messages about identical files. Change the width of the output line to n characters. The default width is 72. EXTERNAL INFLUENCES
Environment Variables LC_COLLATE determines the order in which the output is sorted. If is not specified in the environment or is set to the empty string, the value of is used as a default. If is not specified or is set to the empty string, a default of ``C'' (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to ``C'' (see environ(5)). International Code Set Support Single- and multi-byte character code sets are supported. EXAMPLES
Compare the two directories and and produce a list of changes that would make the directories identical: WARNINGS
This command is likely to be withdrawn from X/Open standards. Applications using this command might not be portable to other vendors' sys- tems. As an alternative is recommended. SEE ALSO
cmp(1), diff(1). STANDARDS CONFORMANCE
dircmp(1)