Sponsored Content
Full Discussion: Single quote _error_.
Top Forums Shell Programming and Scripting Single quote _error_. Post 303027726 by RudiC on Saturday 22nd of December 2018 11:08:23 AM
Old 12-22-2018
It's not in vain that people advise to abstain from using echo because its implementation is inconsistent and differs from system to system, and also between shell versions like sh and bash.
man sh resp. man dash:
Quote:
echo [-n] args...
Print the arguments on the standard output, separated by spaces. Unless the -n option is present, a newline is output following the arguments.

If any of the following sequences of characters is encountered during output, the sequence is not output. Instead, the specified action is performed:

\b A backspace character is output.
\c Subsequent output is suppressed. This is normally used at the end of the last argument to suppress the trailing newline that echo would otherwise output.
\e Outputs an escape character (ESC).
\f Output a form feed.
\n Output a newline character.
whereas in bash (or the external /bin/echo) that behaviour needs to be switched on. man bash:
Quote:
echo [-neE] [arg ...]
Output the args, separated by spaces, followed by a newline. The return status is 0 unless a write error occurs. ... If the -e option is given, interpretation of the following backslash-escaped characters is enabled.
So - you may call that an anomaly, but it is an expected and well known one.
These 3 Users Gave Thanks to RudiC For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Replacing a single quote

Hi there I have a data file like so below 'A/1';'T100002';'T100002';'';'01/05/2004';'31/05/2004';'01/06/2004';'08/06/2004';'1.36';'16';'0.22';'0';'0';'1.58';'0';'0';'0';'0';'0';'0';'clientes\resumen\200405\resumen_T100002_T100002_1.pdf';'';'0001';'S';'20040501';'';'02';'0';'S';'N'... (3 Replies)
Discussion started by: rjsha1
3 Replies

2. Shell Programming and Scripting

single quote

Hi I have a shell script with many lines as below: comment on column dcases.proj_seq_num is dcases_1sq; .... .... I want the above script to be as below: comment on column dcases.proj_seq_num is 'dcases_1sq'; I want to have single quotes like that as above for the entire shell... (2 Replies)
Discussion started by: dreams5617
2 Replies

3. Shell Programming and Scripting

escaping single quote

hi, echo 'abc' will give output abc how can i get output as 'abc' plz help. thanks in advance (3 Replies)
Discussion started by: javeed7
3 Replies

4. UNIX for Dummies Questions & Answers

how to print single quote in awk

Hi all, It is a very stupid problem but I am not able to find a solution to it. I am using awk to get a column from a file and I want to get the output field in between single quotes. For example, Input.txt 123 abc 321 ddff 433 dfg ........ I want output file to be as ... (6 Replies)
Discussion started by: gauravgoel
6 Replies

5. Shell Programming and Scripting

Regex in grep to match all lines ending with a double quote (") OR a single quote (')

Hi, I've been trying to write a regex to use in egrep (in a shell script) that'll fetch the names of all the files that match a particular pattern. I expect to match the following line in a file: Name = "abc" The regex I'm using to match the same is: egrep -l '(^) *= *" ** *"$' /PATH_TO_SEARCH... (6 Replies)
Discussion started by: NanJ
6 Replies

6. Shell Programming and Scripting

Replace single quote with two single quotes in perl

Hi I want to replace single quote with two single quotes in a perl string. If the string is <It's Simpson's book> It should become <It''s Simpson''s book> (3 Replies)
Discussion started by: DushyantG
3 Replies

7. Shell Programming and Scripting

single quote replacement

hi all, i have a data in the file which of the formate : 100,102,103 and the required formate is \'100\',\'102\',\'103 Idealy we need to replace , with \',\' Regards arkesh (2 Replies)
Discussion started by: arkeshtk
2 Replies

8. Shell Programming and Scripting

How to insert a single quote to each record

I have a file as: 1 New used 1 used New I need o/p as: '1' 'New' 'used' '1' 'used' 'New' (12 Replies)
Discussion started by: karumudi7
12 Replies

9. UNIX for Dummies Questions & Answers

Insert single quote and commas

Hi All, I have a set of data as below : XS012371378 Raj 23-09-12 SH128238948 Andrew 24-08-12 CH273712399 Walsh 12-10-12 JK7249923893 Nick 10-02-13 JP6383791389 Braslin 30-12-13 I want the first column to be extracted separately. I can get this using awk. awk '{print $1}' file_name ... (3 Replies)
Discussion started by: Nand Kishor
3 Replies

10. Shell Programming and Scripting

Replacing all but the first and last double quote in a line with a single quote with awk

From: 1,2,3,4,5,This is a test 6,7,8,9,0,"This, is a test" 1,9,2,8,3,"This is a ""test""" 4,7,3,1,8,"""" To: 1,2,3,4,5,This is a test 6,7,8,9,0,"This; is a test" 1,9,2,8,3,"This is a ''test''" 4,7,3,1,8,"''"Is there an easy syntax I'm overlooking? There will always be an odd number... (5 Replies)
Discussion started by: Michael Stora
5 Replies
echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
All times are GMT -4. The time now is 07:41 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy