There is a flaw in your assumptions, not your understanding. Your understanding is right in that if a command reads from stdin, then it should be able to process the input that it gets. But 'echo' does not read from stdin. It simply processes its argument list and prints whatever it gets to stdout.
When you do 'ls * | echo', the number of arguments passed to 'echo' are 0. This causes the following part of echo's code to kick in:
I picked this up from the source code of 'echo' from the Solaris source.
To get the output that you want, you should execute something like this:
or
Hi. Im using cat to output the contents of a file, then piping it to my while read loop.In this loop variables get assigned values. However when i try to use the variables outside the loop their values has been reset.I understand about subshells etc. but I have no idea how to "preserve" the... (3 Replies)
Hi,
I did not understand why the following did not work out as I expected:
find . -name "pqp.txt" | grep -v "Permission"
I thought I would be able to catch whichever paths containing my pqp.txt file without receiving the display of messages such as "find: cannot access... Permisson... (1 Reply)
Hi All...
Does anyone know how to pipe the output of a "select" statement from a call to Oracle to a file?
ANy ideas woule be greatly appreciated!
Code is as below...
echo "producing CSV file 2..."
sqlplus -s $username/$password@$database<<EOF
set serveroutput on size 1000000
set... (13 Replies)
Hi.
I have a script like so:
#!/bin/bash
download='php /var/www/last.php'
echo $download
if $downloadHow do I pipe the output of the php file into a variable, as when i run the if statement, it just echos the file output to the screen and does not actually consider the output (it will be... (2 Replies)
Hi,
I have heard you can use the echo command and piping together and was wondering if you can help me out.
I want to be able to use the echo command and pipe together to tell me how many files are in my current working directory, which have only my username read, write and execute... (4 Replies)
Hi All,
I am trying to convert the below Csh code into Perl.
But i have the following error.
Can any expert help ?
Error:
ls: *tac: No such file or directory
Csh
set $ST_file = `ls -rt *$testid*st*|tail -1`;
Perl
my $ST_file = `ls -rt *$testid*st*|tail -1`; (10 Replies)
I am trying to have a script run without interaction from the command line. So in my script i have a line like this
echo -e "\n\n\ny\ny\n" | ./script
the goal being the ability to mimic 3 Enter presses and 2 'y/n' responses with 'y' followed by enter.
For some reason tho, it is not... (1 Reply)
Hi all. I am using procmail to deliver an email to a script I am developing. Procmail delivers the email to the script on standard input. I imagine this is the same as piping input from a command into the script. Hence I've been testing my script by running
echo 'test' | sms-autosend-backup.sh
... (2 Replies)
Ok, so there is a perl script that runs as a server, on my local host. It tells me which port to use. I want to pipe that output into my browser so I can do the whole thing with a single command. The problem is, I think, that the program doesn't actually exit cause it's running a server, so...... (6 Replies)
Basically I was wondering if any of you know how to pipe the output of ls to a text file? so in my shell script one of the lines is ls but i want to pipe it into a file called directory listing.
Cheers.
I have tried ls | Directorylisting.txt
but it keeps saying " line 7: DirectoryListing.txt:... (9 Replies)
Discussion started by: LinuxNubBrah
9 Replies
LEARN ABOUT SUNOS
noecho
echo(3XCURSES) X/Open Curses Library Functions echo(3XCURSES)NAME
echo, noecho - enable/disable terminal echo
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library... ]
#include <curses.h>
int echo(void);
int noecho(void);
DESCRIPTION
The echo() function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control soft-
ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.
RETURN VALUES
Upon successful completion, these functions return OK. Otherwise, they return ERR.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)SunOS 5.10 5 Jun 2002 echo(3XCURSES)