It's advised to always double quote variable in a shell script.
The reason for that is treating shell code and shell data in variables equivalently! Not like in other languages that line of code is different entity/type of text than line of string stored under variable. Here it is the same.
In your case $str is expanded correctly with space at the end, but it is then just space in a command line, so it is discarded
You can find more info in this article http://www.cofoh.com/white-shell
Hi All
I want to delete trailing zeros from varible.
ex:
if variable value is 1234.567000 result as 1234.567
if variable has 1234.0000 result as 1234
if variable as abcd.fgh result as abcd.fgh
Can somone give me a solution using awk? (16 Replies)
I'm using this thread as an example, but can't seem to apply it to my situation.
I'm trying to strip the trailing slash (/) from an input argument. Here's a snippet of my command line input and the troublesome code:
$ script_name -s "../pathname/dir/"
snip 8< ...
while getopts :s:... (5 Replies)
Unix gurus,
I have a file as below, which is basically the result set obtained from a sql query on an Oracle database.
ID PROG_NAME USER_PROG_NAME
-------- --------------- ----------------------------------------
33045 INCOIN Import Items
42690 ... (3 Replies)
I am getting a value from a csv file using CUT command, however the command extracting the records with trailing spaces. I am using the result into a sql session to fetch data, because of the trailing spaces the sql session is unable to fetch any data.
Please let me know, how to remove this... (2 Replies)
This seems to be a stupid basic question, but I cant get the space to stick in the awk variable.
I do use this command to grep a time range of the log file.
cat /var/log/daemon.log | awk '$0>=from&&$0<=to' from="$(date +%b" "%e" "%H:%M:%S -d -24hour)" to="$(date +%b" "%e" "%H:%M:%S)"
I now... (9 Replies)
I am trying to change the date format for the following:
YESTER=`TZ=aaa24 date +%b" "%d | sed 's/0/ /'`
TraceList=$(ls -ltR /pdt/logs | grep "$YESTER" | awk '{print $9}')
CMD2=$(find /disk/dan/dansFiles/pass/logs/$TList -name cmd\* -prune)
what I am trying to do in the above... (1 Reply)
Hi All.
How can I convert this:
ABC_1_1
ABC_1_2
ABC_1_3
into this:
ABC_1 1
ABC_1 2
ABC_1 3
I tried this command but it is not working:
awk '{sub(/+$/,"\t", $1)}{print}'
Any suggestions on how to fix this?
Thank you :wall:
Please use code tags when posting data and... (3 Replies)
I want to keep string/varible length to 10 even its actual length is less than 10(may be no value). so, i want to add trailing spaces to my string. :wall:
"typeset -L10 myvarible" is not working, its saying invalid typset -L option.
Can you please advise. (4 Replies)
Given a file:
# configuration file for newsyslog
# $FreeBSD: /repoman/r/ncvs/src/etc/newsyslog.conf,v 1.50 2005/03/02 00:40:55 brooks Exp $
#
# Entries which do not specify the '/pid_file' field will cause the
# syslogd process to be signalled when that log file is rotated. This
# action... (10 Replies)
Hi All,
I am new new to unix.com, I have a question related to shell scripting.
We have a Oracle database backup shell script, which can be used for taking full, incremental & archive log backup based on the parameters passed.
Within the script we export a variable as
export... (5 Replies)
Discussion started by: veeresh_15
5 Replies
LEARN ABOUT PLAN9
exit
exit(1) User Commands exit(1)NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps
SYNOPSIS
sh
exit [n]
return [n]
csh
exit [ ( expr )]
goto label
ksh
*exit [n]
*return [n]
DESCRIPTION
sh
exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of
the last command executed (an EOF will also cause the shell to exit.)
return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe-
cuted.
csh
exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the
expression expr.
The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches
for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to
jump to a label that occurs between a while or for built-in command and its corresponding end.
ksh
exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8
bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing
a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit
except for a shell which has the ignoreeof option (See set below) turned on.
return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the
least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return
is invoked while not in a function or a '.' script, then it is the same as an exit.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO break(1), csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 15 Apr 1994 exit(1)