Can I use the read command to read the contents of a variable? I'm trying by using the following code and getting nothing back. I'm in a Linux environment.
#!/bin/ksh
IFS=~
VAR1=1~2~3~4
echo $VAR1 | read a b c d
print "$a $b $c $d" (9 Replies)
# include <stdio.h>
# include <fcntl.h>
# include <stdlib.h>
# include <sys/stat.h>
int main(int argc, char *argv)
{
int fRead, fPadded, padVal;
int btRead;
int BUFFSIZE = 512;
char buff;
if (argc != 4)
{
printf ("Please provide all of the... (3 Replies)
Hi the following c-code utilizing the 'read()' man 2 read method cant read in files larger that 2gig.
Hi I've found a strange problem on ubuntu64bit, that limits the data you are allowed to allocate on a 64bit platform using the c function 'read()'
The following program wont allow to allocate... (14 Replies)
Hi Guys,
Happy New Year to you all!
I have a requirement to read an embedded new-line using KSH's read builtin.
Here is what I am trying to do:
run_sql "select guestid, address, email from guest" | while read id addr email
do
## Biz logic goes here
done
I can take care of any... (6 Replies)
hi,
this is my script #!/bin/ksh
cat temp_file.dat | while read line
do
read test
if ]; then
break
else echo "ERROR"
fi
done
when i execute this code , the script does wait for the user input . it directly prints "ERROR" and terminates after the no. of times as there... (3 Replies)
Hello All,
i am a newbie and need some help when reading a csv file in a bourne shell script. I want to read 10 lines, then wait for a minute and then do a reading of another 10 lines and so on in the same way. I want to do this till the end of file.
Any inputs are appreciated
... (3 Replies)
Hi
i am looking a way to look at a log file(log.txt) from the last time I've read it.
However after some days the main log file(log.txt) is rename to (log.txt.1).
So now i will have two log files as below.
log.txt.1
log.txt
Now, i have to read the log from the point where i have left... (3 Replies)
Hi
I am new to writing script and want to use a Bash Piped while-read and read from user input.
if something happens on server.log then do while loop or if something happend on user input then do while loop.
Pseudocode something like:
tail -n 3 -f server.log | while read serverline || read... (8 Replies)
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)
Hi.
How can I create a history function? (By "read" command or so)
&
How can I configure a read command so that the arrow keys are not displayed so funny? (^[[A)
Thanks in advance. (4 Replies)
Discussion started by: sinnlosername
4 Replies
LEARN ABOUT OSF1
sum
sum(1) General Commands Manual sum(1)NAME
sum - Displays the checksum and byte count in block-size (1024) units of a file
SYNOPSIS
sum [-o | -r] [file...]
The sum command reads file and calculates a 16-bit checksum and the byte count in block-size (1024) units in the file. If the file argu-
ment is omitted, sum reads standard input.
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
sum: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
OPTIONS
[Tru64 UNIX] Uses an algorithm to compute the checksum using word-by-word computation. Uses an alternate algorithm to compute the check-
sum (rigorous byte-by-byte computation rather than the word-by-word computation).
[Tru64 UNIX] This is the default.
OPERANDS
The file for which a checksum is to be computed. If this operand is omitted, standard input is used.
DESCRIPTION
The checksum and number of blocks are written to standard output. The sum command is generally used to determine if a file that was copied
or communicated over transmission lines is an exact copy of the original. The sum command writes the space used in 1024-byte units.
[Tru64 UNIX] The checksum is calculated using a rigorous byte-byte computation by default.
System V Compatibility
[Tru64 UNIX] The checksum algorithms for the default sum command and the SVID 2 compliant sum command are reversed. The SVID 2 compliant
sum command uses the word-by-word algorithm by default and uses the byte-by-byte algorithm if you specify the -r option on the command
line.
NOTES
The sum utility is marked LEGACY in XCU Issue 5. [Tru64 UNIX] The default algorithm is no longer the word-by-word computation algorithm.
It was changed to the 4.3BSD default algorithm. The algorithms used may not be portable, that is, the same checksum may not be produced
for the same input on different systems. Portable applications should use cksum.
EXIT STATUS
The following exit values are returned: Successful completion. An error occurred.
EXAMPLES
To display the checksum of datafile and the number of blocks in this file, enter: sum datafile
If the checksum of datafile is 1605 and if the file contains 3 blocks, sum displays: 1605 3 datafile
ENVIRONMENT VARIABLES
The following environment variables affect the execution of sum: Provides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari-
ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value,
overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes
of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the for-
mat and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of
LC_MESSAGES.
SEE ALSO
Commands: cksum(1), wc(1)
Standards: standards(5)sum(1)
03-05-2018
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