06-13-2006
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi Guys,
Could anyone shed some light on the length of a Unix filepath max length pls ?
thanks !
Wilson (3 Replies)
Discussion started by: wilsontan
3 Replies
2. UNIX for Dummies Questions & Answers
Hi all,
I tried to write a shell to read huge file and eliminate max length record which is wrong generated record. But I get an error
remove_sp.sh: line 27: syntax error near unexpected token `else'
remove_sp.sh: line 27: ` else $LINE >> REJFILE'
My shell is here:
#!/bin/sh... (5 Replies)
Discussion started by: mr_bold
5 Replies
3. Shell Programming and Scripting
Hi all,
I have a flat file of 1000 rows. I want to check the length of the 5th column. The one having the longest length , I want to set it as DEFINED PARAMETER.
So later I can check others with that particular number only.
Any ideas ?? (2 Replies)
Discussion started by: ganesh123
2 Replies
4. Shell Programming and Scripting
Hi
i have a requirement that is
extract the max length word from a file ?
plz reply (2 Replies)
Discussion started by: vankireddy
2 Replies
5. Shell Programming and Scripting
I'm writing a wrapper script (in bash) that wraps another (bash) script. When calling the wrapped script, I need to pass all the received arguments/options to it. Is there a built in variable that holds all the options? I wrote a little while loop (see below) which works. But I wanted to know if... (1 Reply)
Discussion started by: Dilbert
1 Replies
6. Programming
Hello,
In shared memory, when using shmget function, first parameter is ket_t key.
I know it is an integer type, but length of it is system dependent. That means may not be have integer's ranges.
What is range of key_t in Linux? Is it different in distros, for example in ubuntu & fedora? (2 Replies)
Discussion started by: pronetin
2 Replies
7. UNIX for Advanced & Expert Users
Hi,
This is my first post to this site. So kindly forgive if I am writing in a wrong section.
My query is that...
I want to modify the max username length size. I guess it is 32/64 on CentOS. Now I want to change it to 128. Is there any way to do that?
Thanks in advance!! :) (4 Replies)
Discussion started by: ajay303
4 Replies
8. UNIX for Dummies Questions & Answers
Hey Any one...
Do u know any way I can modify the max username length in unix? I guess it is 32/64 characters by default. Suppose I want to increase it to 128.
i hav tried /etc/skel
but no use...
How can I do that? (2 Replies)
Discussion started by: MayureshRisbud
2 Replies
9. Shell Programming and Scripting
I have a large file of many pairs of sequences and their headers, which always begin with '>'
I'm looking for help on how to retain only sequences (and their headers) below a certain length. So if min length was 10, output would be
I can filter by length, but I'm not sure how to exclude... (3 Replies)
Discussion started by: pathunkathunk
3 Replies
10. Shell Programming and Scripting
hai guys,
pick the 1st field and calculate max length.
if suppose max length is 2,
then compare the all records if <2 then add zero's prefix of the record.
for ex:
s.no,sname
1,djud
37,jtuhe
in this max length of the 1st field is 2 right
the output wil be
s.no,sname
01,djud... (6 Replies)
Discussion started by: Suneelbabu.etl
6 Replies
LEARN ABOUT NETBSD
getopt
GETOPT(1) BSD General Commands Manual GETOPT(1)
NAME
getopt -- parse command options
SYNOPSIS
args=`getopt optstring $*`
set -- `getopt optstring $*`
DESCRIPTION
getopt is used to break up options in command lines for easy parsing by shell procedures, and to check for legal options. [Optstring] is a
string of recognized option letters (see getopt(3)); if a letter is followed by a colon, the option is expected to have an argument which may
or may not be separated from it by white space. The special option ``--'' is used to delimit the end of the options. getopt will place
``--'' in the arguments at the end of the options, or recognize it if used explicitly. The shell arguments ($1, $2, ...) are reset so that
each option is preceded by a ``-'' and in its own shell argument; each option argument is also in its own shell argument.
getopt should not be used in new scripts; use the shell builtin getopts instead.
EXAMPLES
The following code fragment shows how one might process the arguments for a command that can take the options [a] and [b], and the option
[c], which requires an argument.
args=`getopt abc: $*`
if [ $? -ne 0 ]; then
echo 'Usage: ...'
exit 2
fi
set -- $args
while [ $# -gt 0 ]; do
case "$1" in
-a|-b)
flag=$1
;;
-c)
carg=$2; shift
;;
--)
shift; break
;;
esac
shift
done
This code will accept any of the following as equivalent:
cmd -acarg file file
cmd -a -c arg file file
cmd -carg -a file file
cmd -a -carg -- file file
IEEE Std 1003.2 (``POSIX.2'') mandates that the sh(1) set command return the value of 0 for the exit status. Therefore, the exit status of
the getopt command is lost when getopt and the sh(1) set command are used on the same line. The example given is one way to detect errors
found by getopt.
DIAGNOSTICS
getopt prints an error message on the standard error output when it encounters an option letter not included in [optstring].
SEE ALSO
sh(1), getopt(3)
HISTORY
Written by Henry Spencer, working from a Bell Labs manual page. Behavior believed identical to the Bell version.
BUGS
Whatever getopt(3) has.
Arguments containing white space or embedded shell metacharacters generally will not survive intact; this looks easy to fix but isn't.
The error message for an invalid option is identified as coming from getopt rather than from the shell procedure containing the invocation of
getopt; this again is hard to fix.
The precise best way to use the set command to set the arguments without disrupting the value(s) of shell options varies from one shell ver-
sion to another.
BSD
November 28, 2009 BSD