File globbing order Post: 303028636

Sponsored Content

Top Forums Shell Programming and Scripting File globbing order Post 303028636 by bakunin on Friday 11th of January 2019 03:41:04 PM

01-11-2019

Registered User

Quote:

Originally Posted by poova

Code:

#get the file name#
file1=$1
file2=$2
rm $file1 # delete the old file
mv $file2 <target path> #move the new file to the target path

execution syntax for FileRemove.sh in my program: sh FileRemove.sh XYZ*.txt

But nowadays $2 getting passed as old file and $1 getting passed as new file. Because of this I'm deleting my new file in script instead of old file.

First: what should the script do if the glob you use does not evaluate to exactly two files?

But supposing it does, if you want to sort according to time and not according to name then use the -tr (sort for time, reversed order) of ls and sort your arguments according to this, regardless of which position they arrive at. Notice that it does pay to build at least a modicum of error-checking into your code (i know, you haven't asked about that, but it still is a good idea.):

Code:

#! /bin/ksh

file1=$(ls -tr $* | head -n 1)
file2=$(ls -tr $* | tail -n 1)

if ! rm $file1 ; then
     print -u2 - "Error deleting $file1"
     exit 1
fi
if ! mv $file2 <target path> ; then
     print -u2 - "Error moving $file2"
     exit 2
fi
exit 0

Just in case you don't use Korn shell: you should have said which shell you use. The translation of this to any other shell is left as an exercise to the reader.

I hope this helps.

bakunin

Last edited by bakunin; 01-12-2019 at 07:21 AM.. Reason: corrected an error, thanks to RudiC for the catch

This User Gave Thanks to bakunin For This Post:

bakunin

View Public Profile for bakunin

Find all posts by bakunin

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk / bash globbing question

I would like to process a list of files matching: GPS*\.xyz with an awk script. I would then like to output the files to GPS*\.xyz.out (e.g. the same file name appended with .out). Something like: awk '{if(NR==1) {offset=-$1}; $1=$1+offset; print }' GPS*.xyz this does exactly what I want EXCEPT...

2. Shell Programming and Scripting

Globbing slash Wildcarding Question

I am on HP-UX and I am trying to come up with a method to call in a list of files named like so. filename020107.dat filename020207.dat filename020307.dat Obviously I can list them ls them like so, ls filename*.dat. In case you did not notice the number is a date and I was hoping to match...

3. Shell Programming and Scripting

globbing, $# is too high after wildcard expansion in bash script

How can I pass in an argument such as "*.k" to a bash script without having to double-quote *.k and not having *.k `glob` to match all files in the pattern? I tried using noglob in my script but this didn't work the way I thought it would.. expansion is still occuring, $# is higher than I...

4. Shell Programming and Scripting

creating a file in reverse order of another file

Hi, I have a requirement where i need to write a script to create the new file from the given input file with the data in reverse order (bottom to top) Sample data: Input File-------------- Java VB Oracle Teradata Informatica Output file:----------------- Informatica Teradata Oracle...

5. Shell Programming and Scripting

Order file by lines

My script(3 arguments $1 = folder,$2 extension,$3 string) should do the following things: -Enter in the folder of $1(if exists). -Put ls *.$2 > temp.txt ( I use a temp file to store the result of ls command and if $2 = txt in this file I'll have all the .txt files of the folder) -Now I want to...

6. UNIX for Advanced & Expert Users

Write to a file in a specified order

This is my input file : FCBAFE572C5E4BA29B3F8030BD480A94,907 ,1/1/2003,12/31/2005,ACT,1,2010-05-07 04:42:26.380000 2345AD5D2BFB29C821C1BC3DE8B746A7,907 ,1/1/2004,1/31/2005,ACT,1,2010-05-07 04:42:26.380000 E45B7371EEC0D1AB00E1750B5BC661F7,907 ,1/1/2004,12/31/2006,ACT,1,2010-05-07...

7. Shell Programming and Scripting

Globbing or not globbing

Hi guys, Here is a simple script. It writes the current time to specific files in a directory. The arguments are the names of the files to write the date to (without path nor extension). root:~# cat /usr/local/bin/dummy.sh #!/bin/sh -e for file in $@; do date >> /var/lib/$file.dat...

8. UNIX for Dummies Questions & Answers

File globbing questions

hi guys, jus some file globbing questions sed "s/^.*on//" what does the full stop and asterisk means? i onli know that ^ means inverse or not

9. Shell Programming and Scripting

Negation in Bash Globbing

$ ls -1 a.1 b.1 x_a.1 x_b.1 $ ls -1 * b.1 x_a.1 x_b.1 $ ls -1 ** a.1 b.1 x_a.1 x_b.1The last result is not as expected. Why? Thanks.

10. Shell Programming and Scripting

Manipulation row order in file

Hello, I am trying to replace the position of each row by the next row. OS: Ubuntu 18.04, bionic I'd appreciate your help. input_file: -O fileA wget http://x.y.z./a -O fileB wget http://a.b.c./d -O fileC wget http://q.f.s/t .. .. .. -O fileZZ wget http://r.t.y/u I expect:

LEARN ABOUT SUNOS

comm

comm(1) 							   User Commands							   comm(1)

NAME

       comm - select or reject lines common to two files

SYNOPSIS

       comm [-123] file1 file2

DESCRIPTION

       The comm utility reads file1 and file2, which must be ordered in the current collating sequence, and produces three text columns as output:
       lines only in file1; lines only in file2; and lines in both files.

       If the input files were ordered according to the collating sequence of the current locale, the lines  written  will  be	in  the  collating
       sequence of the original lines. If not, the results are unspecified.

OPTIONS

       The following options are supported:

       -1	Suppresses the output column of lines unique to file1.

       -2	Suppresses the output column of lines unique to file2.

       -3	Suppresses the output column of lines duplicated in file1 and file2.

OPERANDS

       The following operands are supported:

       file1	A path name of the first file to be compared. If file1 is -, the standard input is used.

       file2	A path name of the second file to be compared. If file2 is -, the standard input is used.

USAGE

       See largefile(5) for the description of the behavior of comm when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

EXAMPLES

       Example 1: Printing a list of utilities specified by files

       If file1, file2, and file3 each contain a sorted list of utilities, the command

       example% comm -23 file1 file2  | comm -23 - file3

       prints a list of utilities in file1 not specified by either of the other files. The entry:

       example% comm -12 file1 file2 | comm -12 - file3

       prints a list of utilities specified by all three files. And the entry:

       example% comm -12  file2 file3 | comm -23 -file1

       prints a list of utilities specified by both file2 and file3, but not specified in file1.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions  of  the  following  environment  variables that affect the execution of comm: LANG, LC_ALL, LC_COLLATE,
       LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	All input files were successfully output as specified.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.10							    3 Mar 2004								   comm(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk / bash globbing question

Discussion started by: franzke

2. Shell Programming and Scripting

Globbing slash Wildcarding Question

Discussion started by: scotbuff

3. Shell Programming and Scripting

globbing, $# is too high after wildcard expansion in bash script

Discussion started by: zoo591

4. Shell Programming and Scripting

creating a file in reverse order of another file

Discussion started by: srilaxmi