10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello!
I have one problem with my bash script - I would like to be able to read white space characters from stdin (for example single " ") - can I acomplish that somehow? I need to read only one character at the time, so I use read -s -n 1 var but it doesn't work for whitespaces apparently.
... (3 Replies)
Discussion started by: xqwzts
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2. Shell Programming and Scripting
Hi;
In following code
find LOG_DIR -type f | while read filename; do echo $filename; done
I want to precede each white space encountered in filename with \ so that when i use $filename for running some commands in do...done,it wont give me an error.
will appreciate ur help in this.... (1 Reply)
Discussion started by: ajaypadvi
1 Replies
3. Shell Programming and Scripting
Hi,
I am having problem in deleting the leading spaces:-
cat x.csv
baseball,NULL,8798765,Most played
baseball,NULL,8928192,Most played
baseball,NULL,5678945,Most played
cricket,NOTNULL,125782,Usually played
cricket,NOTNULL,678921,Usually played
$ nawk 'BEGIN{FS=","}!a... (2 Replies)
Discussion started by: scripter12
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4. UNIX for Dummies Questions & Answers
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
5. Shell Programming and Scripting
Hello dear community!
I've recently written a BASH function for auto completion of options. It works like following: if a user types a command and then an argument to this command which starts with "^-" and then presses TAB, then 'user_command --help (or -h)' is invoked and possible options are... (0 Replies)
Discussion started by: sidorenko
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6. UNIX for Dummies Questions & Answers
Hello Guys,
I am a newbie to unix. I am having a requirement. Please help me for finding a solution for this,
I am having a file as mentioned below:
$ cat shank
ackca
acackac akcajc akcjkcja akcj
ckcklc
I want to delete all the white spaces in this file,
I tried... (2 Replies)
Discussion started by: mraghunandanan
2 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I have a file that has multiple spaces between characters. I want to delete or convert the multiple spaces into a single space. I think this can be done in "sed" but I only know the syntax to delete trailing or leading spaces. Can this be done with "sed" or awk?
I have a file that looks... (6 Replies)
Discussion started by: eja
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8. Shell Programming and Scripting
Hi,
Can anybody suggest me how to combine two strings with two or more white spaces and assign it to a variable?
E.g.
first=HAI
second=HELLO
third="$first $second" # appending strings with more than one white spaces
echo $third
this would print
HAI HELLO
Output appears... (2 Replies)
Discussion started by: harish_oty
2 Replies
9. Shell Programming and Scripting
I have a variable that calls in a string from txt file. Problem is the string comes with an abundance of white spaces trailing it. Is there any easy way to trim the tailing white spaces off at the end? Thanks in advance. (9 Replies)
Discussion started by: briskbaby
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10. Shell Programming and Scripting
hi all...
i have the next question:
i have a flat file with a lot of records (lines). Each record has 10 fields, which are separated by pipe (|). My problem is what sometimes, in the first record, there are white spaces (no values, nothing) in the beginning of the record, like this:
ws ws... (2 Replies)
Discussion started by: DebianJ
2 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).
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
signal.h(3HEAD), attributes(5)
SunOS 5.11 14 Sep 1992 ckstr(1)