10-15-2007
ksh - test if string contains alphanumeric...
Okay I will let users input spaces as well
I am having a mental block. I have done a couple of searches but havent found anything that I understand (the likes of :alpha: and awk).
Basically I want to give the user an option to enter some text which will go down as a field within a flat file ( which is delimeted by : ).
I want to limit this to 50 characters (I believe I can use typeset -z50 for this)
I also just want a-z,A-Z,(spaces) and numbers. Whats the best way to validate the input?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
how to match an alphanumeric string like the following.
i have to do like the following.
if the input line is
the data is {clock_91b}
i have to replace that with
the string was ("clock_91b")
i tried like
$line =~ s/the data is\s+\{(+)\}/the string was \(\"$1\"\)/
which... (4 Replies)
Discussion started by: sskb
4 Replies
2. UNIX for Dummies Questions & Answers
Hi :)
I am writing a ksh
I have a string of general format
A12B3456CD78
the string is of variable length
the string always ends with numbers (here it is 78.. it can be any number of digits may be 789 or just 7)
before these ending numbers are alphabets (here it is CD can even be... (3 Replies)
Discussion started by: lakshmikanth
3 Replies
3. Shell Programming and Scripting
I'm trying to do a simple if statement that tests if a filename exists with a user specified string.
So say I have these files:
Assigned_1day_after_due_chuong
Assigned_1day_after_due_gallen
Assigned_1day_after_due_heidenre
and i'm running a script and want to know if a... (6 Replies)
Discussion started by: bob122480
6 Replies
4. Shell Programming and Scripting
This is the code:
while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done
I read a command on every loop an execute it.
I check if the string equals the word stop to end the loop,but it say that I gave too many arguments to test.
For example echo hello.
Now the... (1 Reply)
Discussion started by: Max89
1 Replies
5. Shell Programming and Scripting
How to check weather a string is like test* or test* ot *test* in if condition (5 Replies)
Discussion started by: johnjerome
5 Replies
6. Shell Programming and Scripting
Hi there,
I want to compare 2nd column which are alphanumeric values from each of the 2 files i.e.,lspv_pre.out and lspv_post.out , if found echo some message.
lspv_pre.out
hdisk0 00c39eaa451144dd rootvg active
hdisk1 00c39eaa45223322 ... (3 Replies)
Discussion started by: mbak
3 Replies
7. Shell Programming and Scripting
Hi,
I would like to be able to parse out a substring matching a basic pattern, which is a character followed by 3 or 4 digits (for example S1234 out of a larger string). The main string would just be a filename, like Thisis__the FileName_S1234_ToParse.txt. The filename isn't fixed, but the... (2 Replies)
Discussion started by: keaneMB
2 Replies
8. Shell Programming and Scripting
Hi everyone,
I want help to insert space between digits and letters in a alphanumeric string.
INPUT
TRY234TER
PHY1TYR
EXPECTED OUTPUT
TRY 234 TER
PHY 1 TYR
The lines always begin with the letters and the alphabets will be a three letter combination before and after the number. The... (2 Replies)
Discussion started by: kaav06
2 Replies
9. UNIX for Beginners Questions & Answers
Hi,
I will be having file names like below,
1420SP1.01804
1420SP1.01805D
1420SP1.01805
1420SP1.01806D
1420SP1.01806
1420SP1.01901D
1420SP1.01901
1420SP1.01902D
1420SP1.01902
1420SP1.01903D
1420SP1.01903
1420SP1.01904
1420SP1.01905
From this, I need to list file names which is... (3 Replies)
Discussion started by: Sumanthsv
3 Replies
10. Shell Programming and Scripting
Hi,
I want a script of a code that will allow me to generate all possible combinations of alphanumberica characters of length 12 such that each string will contain numbers and either small or capital letters.
For example a string may look like this: 123AB45cd678. (11 Replies)
Discussion started by: faizlo
11 Replies
JOIN(1) BSD General Commands Manual JOIN(1)
NAME
join -- relational database operator
SYNOPSIS
join [-a file_number | -v file_number] [-e string] [-o list] [-t char] [-1 field] [-2 field] file1 file2
DESCRIPTION
The join utility performs an ``equality join'' on the specified files and writes the result to the standard output. The ``join field'' is
the field in each file by which the files are compared. The first field in each line is used by default. There is one line in the output
for each pair of lines in file1 and file2 which have identical join fields. Each output line consists of the join field, the remaining
fields from file1 and then the remaining fields from file2.
The default field separators are tab and space characters. In this case, multiple tabs and spaces count as a single field separator, and
leading tabs and spaces are ignored. The default output field separator is a single space character.
Many of the options use file and field numbers. Both file numbers and field numbers are 1 based, i.e., the first file on the command line is
file number 1 and the first field is field number 1. The following options are available:
-a file_number
In addition to the default output, produce a line for each unpairable line in file file_number.
-e string
Replace empty output fields with string.
-o list
The -o option specifies the fields that will be output from each file for each line with matching join fields. Each element of list
has either the form file_number.field, where file_number is a file number and field is a field number, or the form '0' (zero), repre-
senting the join field. The elements of list must be either comma (',') or whitespace separated. (The latter requires quoting to
protect it from the shell, or, a simpler approach is to use multiple -o options.)
-t char
Use character char as a field delimiter for both input and output. Every occurrence of char in a line is significant.
-v file_number
Do not display the default output, but display a line for each unpairable line in file file_number. The options -v 1 and -v 2 may be
specified at the same time.
-1 field
Join on the field'th field of file1.
-2 field
Join on the field'th field of file2.
When the default field delimiter characters are used, the files to be joined should be ordered in the collating sequence of sort(1), using
the -b option, on the fields on which they are to be joined, otherwise join may not report all field matches. When the field delimiter char-
acters are specified by the -t option, the collating sequence should be the same as sort(1) without the -b option.
If one of the arguments file1 or file2 is '-', the standard input is used.
EXIT STATUS
The join utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
For compatibility with historic versions of join, the following options are available:
-a In addition to the default output, produce a line for each unpairable line in both file1 and file2.
-j1 field
Join on the field'th field of file1.
-j2 field
Join on the field'th field of file2.
-j field
Join on the field'th field of both file1 and file2.
-o list ...
Historical implementations of join permitted multiple arguments to the -o option. These arguments were of the form
file_number.field_number as described for the current -o option. This has obvious difficulties in the presence of files named 1.2.
These options are available only so historic shell scripts do not require modification and should not be used.
SEE ALSO
awk(1), comm(1), paste(1), sort(1), uniq(1)
STANDARDS
The join command conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD
July 5, 2004 BSD