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Shell Programming and Scripting
* character evaluating too soon - Help!
Post 92122 by Bab00shka on Thursday 8th of December 2005 05:36:27 AM
12-08-2005
* character evaluating too soon - Help!
I have a user defined configuration file, which could contain the following type of entries:
directory_001=/a/directory/structure
pattern_001=fred*
pattern_002=*
I have a script which reads the file generically which will loop round
loop 1
genvar=”directory”
iteration=”001”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=/a/directory/structure
loop 2
genvar=”pattern”
iteration=”001”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=”fred*”
The above appears to work fine, however, the problem arises with loop 3
loop3
genvar=”pattern”
iteration=”002”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=”*”
actual results are an error pattern_002: parameter not set
I realise what is happening and can resolve the problem by using pattern_002=\* in the config file. The problem is that the file is user created and it may be that someone will forget the backslash before the *.
Can someone suggest a way to resolve this so that a * without a backslash can be used in the configuration file please?
Many thanks for your help,
Helen
directory_001=/a/directory/structure
pattern_001=fred*
pattern_002=*
I have a script which reads the file generically which will loop round
loop 1
genvar=”directory”
iteration=”001”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=/a/directory/structure
loop 2
genvar=”pattern”
iteration=”001”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=”fred*”
The above appears to work fine, however, the problem arises with loop 3
loop3
genvar=”pattern”
iteration=”002”
eval varcontents=”\$genvar”_”$iteration”
expected results varcontents=”*”
actual results are an error pattern_002: parameter not set
I realise what is happening and can resolve the problem by using pattern_002=\* in the config file. The problem is that the file is user created and it may be that someone will forget the backslash before the *.
Can someone suggest a way to resolve this so that a * without a backslash can be used in the configuration file please?
Many thanks for your help,
Helen
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LEARN ABOUT SUSE
pam_issue
PAM_ISSUE(8) Linux-PAM Manual PAM_ISSUE(8) NAME
pam_issue - PAM module to add issue file to user prompt SYNOPSIS
pam_issue.so [noesc] [issue=issue-file-name] DESCRIPTION
pam_issue is a PAM module to prepend an issue file to the username prompt. It also by default parses escape codes in the issue file similar to some common getty's (using x format). Recognized escapes: d current day l name of this tty m machine architecture (uname -m) machine's network node hostname (uname -n) o domain name of this system release number of operating system (uname -r) current time s operating system name (uname -s) u number of users currently logged in U same as u except it is suffixed with "user" or "users" (eg. "1 user" or "10 users") v operating system version and build date (uname -v) OPTIONS
noesc Turns off escape code parsing. issue=issue-file-name The file to output if not using the default. MODULE TYPES PROVIDED
Only the auth module type is provided. RETURN VALUES
PAM_BUF_ERR Memory buffer error. PAM_IGNORE The prompt was already changed. PAM_SERVICE_ERR A service module error occurred. PAM_SUCCESS The new prompt was set successfully. EXAMPLES
Add the following line to /etc/pam.d/login to set the user specific issue at login: auth optional pam_issue.so issue=/etc/issue SEE ALSO
pam.conf(5), pam.d(5), pam(8) AUTHOR
pam_issue was written by Ben Collins <bcollins@debian.org>. Linux-PAM Manual 04/01/2010 PAM_ISSUE(8)