Visit Our UNIX and Linux User Community

Full Discussion: Set problem with spaces
Top Forums Shell Programming and Scripting Set problem with spaces Post 302851189 by SkySmart on Saturday 7th of September 2013 12:06:59 PM
Old 09-07-2013
Originally Posted by Scrutinizer
That is because in addition to your original problem specification you are using command substitution: $( .. ) which will cause the output of the command to be split into fields according to the IFS variable, which defaults to a space, a TAB and a newline. The same would go for variable expansion.

There is a difference between:
$ set -- hello 'cat dog walk' money elephant
$ echo "$2"
cat dog walk

$ var="hello 'cat dog walk' money elephant"
$ set -- $var
$ echo "$2"

in the first case there are 4 fields, and no field splitting is performed
in the second case there is field splitting after expansion of the variable "var", which results in 6 fields with the default IFS

You could try something like this:
$ oldIFS=$IFS
$ IFS="
$ set -- $(xargs -n1 < infile2443)
$ IFS=$oldIFS
$ echo "$2"
cat dog walk

this worked. thank you so much!!!!
Test Your Knowledge in Computers #390
Difficulty: Medium
SdlBasic is a multiplatform interpreter for BASIC which can be used to make games in 2d style amos for linux and windows.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

problem with the blank spaces in array

Hi all! i need your help. I'm getting started with this... in need to insert in an array string values. But the thing is that this strings have blank spaces... for example if a want to put "filed1 = " and "field2 = " .... in the array , when i want to print all the fields, it only shows... (4 Replies)
Discussion started by: kamicasse
4 Replies

2. Shell Programming and Scripting

problem with spaces and argument parsing

public class HelloWorld { public static void main(String args) { System.out.println("Welcome, master"); } } and I compiled using javac ] Suppose that I execute the following command directly from the shell: java -XX:OnError="gdb - %p" HelloWorld Then it works... (8 Replies)
Discussion started by: fabulous2
8 Replies

3. UNIX for Dummies Questions & Answers

Problem with spaces in directory path

Hi Gurus, I have a requirement. cat /usdd/Sample/"NDDF Plus DB"/"NDDF Descriptive and Pricing"/"NDDF BASICS 3.0"/"Pricing"/1.txt | sed 's/*|*/|/g' | sed 's/^*//'| sed 's/^*//; s/*$//' > temp.txt In unix prompt the above command is reading the file 1.txt and I am... (1 Reply)
Discussion started by: prabhutkl
1 Replies

4. Shell Programming and Scripting

set tab to 4 spaces in vi

Hi, I want to set my tab lenght to 4 spaces instead of 8. And when i press tab instead of inserting tab it should insert 4 spaces. if i do set ts=4 this set tab=4. But this inserts tab. Say suppose i copy the code from unix to texpad/wordpad.Textpad will interpret tab as 8 spaces.(I can set... (4 Replies)
Discussion started by: pinnacle
4 Replies

5. Shell Programming and Scripting

Problem using egrep: spaces and newline

Hello: I am working in bash and am a newbie. I want to eliminate spaces from strings. Since this is a basic operation, I searched online and implemented the suggestions; however, I am facing a problem here. I have an input file which looks like this: abc defghi jklmno pqrs tuvw xyzabcd... (8 Replies)
Discussion started by: andyu11
8 Replies

6. UNIX for Dummies Questions & Answers

Problem with White spaces and tabs

Hi All, I am facing issues converting white spaces and tabs together in a file I am reading. Here is the command I am trying: tr -s ' '@ | sort -t@ +1n filename I guess the problem is that it is not converting the tabs to another delimiter. Also, I am supposed to accomplish this only using... (5 Replies)
Discussion started by: sh_kk
5 Replies

7. Web Development

[MYSQL] problem with spaces in rows

Hello. I'm not sure how I can get around this, or what I am doing wrong, but I need some help. :) I want to do an select query looking like this: SELECT venue, SUM( amount ) FROM IWD WHERE venue = 'Foxy Hollow' Unfortunately I need to have spaces in the names in these fields, is... (10 Replies)
Discussion started by: noratx
10 Replies

8. Shell Programming and Scripting

problem with spaces in filename

I have written a script to run ddrescue on a list of files. #!/bin/bash # # A script to rescue data recursively using ddrescue. srcDir=/damaged/hdd/movies/ #the source directory desDir=/new/hdd/movies/ #the destination directory... (2 Replies)
Discussion started by: colsinc
2 Replies

9. Shell Programming and Scripting

Problem with spaces in the path

Hi all, I have a variable test has the following value assigned.. could you please help on doing cd or ls to the value in the varible ... $echo $test /bdm/sdd/compounds/AD4833XT/requests/clin/Watson_20090420/docs/MHRA\ Comments\ \&\ Responses $cd $test ksh: cd: bad argument count $cd... (3 Replies)
Discussion started by: firestar
3 Replies

10. Shell Programming and Scripting

"set variable with spaces and apostrophe after s"

Hi Guys, I have a variable such that: set x = (Session,Date,Type,Receive Coil Name,Manufacturer,Manufacturer's Model Name) foreach i ($x) echo $i end I would like to read each variable one by one like: Session Date Type Receive Coil Name Manufacturer Manufacturer's Model Name Is... (1 Reply)
Discussion started by: dixits
1 Replies
read(1)                                                            User Commands                                                           read(1)

read - read a line from standard input SYNOPSIS
/usr/bin/read [-r] var... sh read name... csh set variable = $< ksh read [ -prsu [n]] [ name ? prompt] [name...] DESCRIPTION
/usr/bin/read The read utility will read a single line from standard input. By default, unless the -r option is specified, backslash () acts as an escape character. If standard input is a terminal device and the invoking shell is interactive, read will prompt for a continuation line when: o The shell reads an input line ending with a backslash, unless the -r option is specified. o A here-document is not terminated after a NEWLINE character is entered. The line will be split into fields as in the shell. The first field will be assigned to the first variable var, the second field to the second variable var, and so forth. If there are fewer var operands specified than there are fields, the leftover fields and their interven- ing separators will be assigned to the last var. If there are fewer fields than vars, the remaining vars will be set to empty strings. The setting of variables specified by the var operands will affect the current shell execution environment. If it is called in a subshell or separate utility execution environment, such as one of the following: (read foo) nohup read ... find . -exec read ... ; it will not affect the shell variables in the caller's environment. The standard input must be a text file. sh One line is read from the standard input and, using the internal field separator, IFS (normally space or tab), to delimit word boundaries, the first word is assigned to the first name, the second word to the second name, and so on, with leftover words assigned to the last name. Lines can be continued using ewline. Characters other than NEWLINE can be quoted by preceding them with a backslash. These backslashes are removed before words are assigned to names, and no interpretation is done on the character that follows the backslash. The return code is 0, unless an end-of-file is encountered. csh The notation: set variable = $< loads one line of standard input as the value for variable. (See csh(1)). ksh The shell input mechanism. One line is read and is broken up into fields using the characters in IFS as separators. The escape character, (), is used to remove any special meaning for the next character and for line continuation. In raw mode, -r, the character is not treated specially. The first field is assigned to the first name, the second field to the second name, and so on, with leftover fields assigned to the last name. The -p option causes the input line to be taken from the input pipe of a process spawned by the shell using |&. If the -s flag is present, the input will be saved as a command in the history file. The flag -u can be used to specify a one digit file descriptor unit n to read from. The file descriptor can be opened with the exec special command. The default value of n is 0. If name is omitted, REPLY is used as the default name. The exit status is 0 unless the input file is not open for reading or an end-of-file is encoun- tered. An end-of-file with the -p option causes cleanup for this process so that another can be spawned. If the first argument contains a ?, the remainder of this word is used as a prompt on standard error when the shell is interactive. The exit status is 0 unless an end-of- file is encountered. OPTIONS
The following option is supported: -r Does not treat a backslash character in any special way. Considers each backslash to be part of the input line. OPERANDS
The following operand is supported: var The name of an existing or non-existing shell variable. EXAMPLES
Example 1: An example of the read command The following example for /usr/bin/read prints a file with the first field of each line moved to the end of the line: example% while read -r xx yy do printf "%s %s " "$yy" "$xx" done < input_file ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of read: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. IFS Determines the internal field separators used to delimit fields. PS2 Provides the prompt string that an interactive shell will write to standard error when a line ending with a backslash is read and the -r option was not specified, or if a here-document is not terminated after a newline character is entered. EXIT STATUS
The following exit values are returned: 0 Successful completion. >0 End-of-file was detected or an error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), ksh(1), line(1), set(1), sh(1), attributes(5), environ(5), standards(5) SunOS 5.10 28 Mar 1995 read(1)

Featured Tech Videos

All times are GMT -4. The time now is 05:25 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy