10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Trying to use the read command. How do you add a 2nd option? In this example I'd like to offer two options, pre and post. If you answer pre, you get one output but if you answer post, you get another output.
echo Is this pre or post?
read pre
if
then echo You have typed pre.
fi (6 Replies)
Discussion started by: jimmyf
6 Replies
2. UNIX for Beginners Questions & Answers
Is there a way to make the input of the read command (or some similar command that I'm unaware of) not visible, or with an astrix??
An example:
#!/bin/bash
# Example
echo; echo "Who are you??"; read name
if ;
then echo "Welcome, the terminal is yours."; exit
else "Stranger... (2 Replies)
Discussion started by: Huitzilopochtli
2 Replies
3. Shell Programming and Scripting
Hi,
I am facing issues with the below:
I have a lookup file say lookup.lkp.This lookup.lkp file contains strings delimited by comma(,).
Now i want to read this command from file and execute it.
So my code below is :
Contents in the lookup.lkp file is :
c_e,m,a,`cd $BOX | ls cef_*|tail... (7 Replies)
Discussion started by: vital_parsley
7 Replies
4. Shell Programming and Scripting
Hello guys,
I am trying to a script that reads from key board and use the entered value in the next step.
Example: enter folder name
read $folder (i will give work)
cd /main/$folder/
pwd
it should print /main/work
---------- Post updated at 03:31 PM ----------... (1 Reply)
Discussion started by: sharath24
1 Replies
5. UNIX for Dummies Questions & Answers
Hey, guys!
Trying to research this is such a pain since the read command itself is a common word. Try searching "unix OR linux read command examples" or using the command substitution keyword. :eek:
So, I wanted to use a command statement similar to the following.
This is kinda taken... (2 Replies)
Discussion started by: ProGrammar
2 Replies
6. UNIX for Dummies Questions & Answers
Hi everyone,
I have problem while writing a shell script for linux (Red Hat).
First I need to create a read command. I tried to google this but so far I can't sort this out. I hope you will be able to help me.
I have to read a file like this :
GESTION_DATA_SET_variable1_variable2
... (2 Replies)
Discussion started by: Aswex
2 Replies
7. Shell Programming and Scripting
hi all
iam not able use read command in the while loop in the following program
while read line
do
echo $line
echo "enter name"
read name
echo "your have entered $name"
done < work.txt
THE READ COMMAND INSIDE THE WHILE LOOP IS NOT WORKING, IS ANY OTHER WAY TO SOLVE THIS... (7 Replies)
Discussion started by: avi.skynet
7 Replies
8. Shell Programming and Scripting
Hi all,
What does -u option indicates in read command.
while read -u var1
do
.
.
done < file.txt (1 Reply)
Discussion started by: krishna_gnv
1 Replies
9. Shell Programming and Scripting
I have file which is space filled likE below
Note: here spaces are replaced by |.
When I use read command to read this file all the spaces are truncated only the default space is not removed. The output is
Note: here spaces are replaced by |.
Can this default truncation be override? (4 Replies)
Discussion started by: COD
4 Replies
10. Shell Programming and Scripting
'Morning
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'|read var
echo $var
This syntax run on AIX (ksh) but not on linux (bash).
I think that problem is the read command, because the following syntax is ok :
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'
Could someone help me!
regards... (16 Replies)
Discussion started by: nymus7
16 Replies
ckstr(1) User Commands ckstr(1)
NAME
ckstr, errstr, helpstr, valstr - display a prompt; verify and return a string answer
SYNOPSIS
ckstr [-Q] [-W width] [ [-r regexp] [...]] [-l length] [-d default] [-h help] [-e error] [-p prompt] [ -k pid [- s signal]]
/usr/sadm/bin/errstr [-W width] [-e error] [-l length] [ [-r regexp] [...]]
/usr/sadm/bin/helpstr [-W width] [-h help] [-l length] [ [-r regexp] [...]]
/usr/sadm/bin/valstr [-l length] [ [-r regexp] [...]] input
DESCRIPTION
The ckstr utility prompts a user and validates the response. It defines, among other things, a prompt message whose response should be a
string, text for help and error messages, and a default value (which are returned if the user responds with a <RETURN>).
The answer returned from this command must match the defined regular expression and be no longer than the length specified. If no regular
expression is given, valid input must be a string with a length less than or equal to the length defined with no internal, leading or
trailing white space. If no length is defined, the length is not checked.
All messages are limited in length to 79 characters and are formatted automatically. Tabs and newlines are removed after a single white
space character in a message definition, but spaces are not removed. When a tilde is placed at the beginning or end of a message defini-
tion, the default text will be inserted at that point, allowing both custom text and the default text to be displayed.
If the prompt, help or error message is not defined, the default message (as defined under EXAMPLES) is displayed.
Three visual tool modules are linked to the ckstr command. They are errstr (which formats and displays an error message on the standard
output), helpstr (which formats and displays a help message on the standard output), and valstr (which validates a response). These modules
should be used in conjunction with Framed Access Command Environment (FACE) objects. In this instance, the FACE object defines the
prompt.
OPTIONS
The following options are supported:
-d default Defines the default value as default. The default is not validated and so does not have to meet any criteria.
-e error Defines the error message as error.
-h help Defines the help message as help.
-k pid Specifies that process ID pid is to be sent a signal if the user chooses to quit.
-l length Specifies the maximum length of the input.
-p prompt Defines the prompt message as prompt.
-Q Specifies that quit will not be allowed as a valid response.
-r regexp Specifies a regular expression, regexp, against which the input should be validated. May include white space. If multiple
expressions are defined, the answer need match only one of them.
-s signal Specifies that the process ID pid defined with the -k option is to be sent signal signal when quit is chosen. If no signal
is specified, SIGTERM is used.
-W width Specifies that prompt, help and error messages will be formatted to a line length of width.
OPERANDS
The following operand is supported:
input Input to be verified against format length and/or regular expression criteria.
EXAMPLES
Example 1: Default prompt
The default prompt for ckstr is:
example% ckstr
Enter an appropriate value [?,q]:
Example 2: Default error message
The default error message is dependent upon the type of validation involved. The user will be told either that the length or the pattern
matching failed. The default error message is:
example% /usr/sadm/bin/errstr
ERROR: Please enter a string which contains no embedded,
leading or trailing spaces or tabs.
Example 3: Default help message
The default help message is also dependent upon the type of validation involved. If a regular expression has been defined, the message is:
example% /usr/sadm/bin/helpstr -r regexp
Please enter a string which matches the following pattern:
regexp
Other messages define the length requirement and the definition of a string.
Example 4: Using the quit option
When the quit option is chosen (and allowed), q is returned along with the return code 3. Quit input gets a trailing newline.
Example 5: Using the valstr module
The valstr module will produce a usage message on stderr. It returns 0 for success and non-zero for failure.
example% /usr/sadm/bin/valstr
usage: valstr [-l length] [[-r regexp] [...]] input
EXIT STATUS
The following exit values are returned:
0 Successful execution.
1 EOF on input, or negative width on -W option, or usage error.
2 Invalid regular expression.
3 User termination (quit).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
face(1), signal.h(3HEAD), attributes(5)
SunOS 5.10 14 Sep 1992 ckstr(1)