The sort utility is defined to work on text files. By definition, text files contain lines that are no longer than LINE_MAX bytes (including the line terminating <newline> character. You can check the value of LINE_MAX on your AIX system using the command:
The standards require LINE_MAX to be at least 2048 and that is the value supported on many UNIX systems.
I would guess that file1.dat contains lines longer than LINE_MAX bytes and you are seeing the undefined behavior that results when sort is asked to process a file that is not a text file.
You could use cut to split your input files with long lines into groups of files with shorter lines (copying the sort keys into each of the files), sort each of the files in the group, and then use paste to recreate your sorted output into a single file with long lines.
(Note, however, that sort -t "," +1 -2 will sort on the remainder of the input line if the sort key compares equal on some lines. So, if your sort keys are not unique, you need to duplicate enough fields to guarantee that you get the same sort order in all of your split files.)
This User Gave Thanks to Don Cragun For This Post:
Hi All,
I am facing a strange situation and want to find why it is occuring . When i convert the whole line into Hexadecimal character i can find the junk value after new line (\n) . If i look in binary mode it is not visible.
PLease let me know how possible the junk character is added... (1 Reply)
Hi All,
Is there any way to append a newline character at the end of a file(coma-separated file), through shell script?
I need to check whether newline character exists at the end of a file, if it does not then append it.
Regards,
Krishna (1 Reply)
Hi All,
I have named a file with current date,time and year as follows:
month=`date | awk '{print $2}'`
date=`date | awk '{print $3}'`
year=`date | awk '{print $6}'`
time=`date +%Hh_%Mm_%Ss'`
filename="test_"$month"_"$date"_"$year"_"$time".txt"
> $filename
The file is created with a... (2 Replies)
Hi All,
I have file with only one record,always be only one record. as like below.
if that line contains newline end of the line..no need to add, if not just add the new line character.
END OF FILE. ROW COUNT: 7
Please help me..
Thanks, (9 Replies)
Hello!
I am able to do this in bash, using:
echo -ne HELLO > file.txt
and then, 'HELLO' is written into file.txt without the newline character to be added in the end of the file.
How is this possible to be done using sh instead of bash?
If I try something similar is SH, then inside... (3 Replies)
Hi All,
I have following piece of code in UNIX C Shell script and I want to add one more command which can add newline at the end of file only if there is no newline character exists.
foreach file (`ls $dd_PLAYCARD_EDI_IN`)
if ( -f $dd_PLAYCARD_EDI_IN/${file} ) then
cat -n... (4 Replies)
Hi Gurus,
Need help. I'm a beginner in Unix. I have a requirement, need to add or append newline (\n) character in file.
Sample Data:
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#Output:
1|Main|Test|~#
2|Main|Hello|~#
3|Main|Unix|~#
4|Main|File|~#\n -- append only... (13 Replies)
Hi below is my file.
cat input.dat
101,abhilash,1000
102,prave
en,2000
103,partha,4
000
10
4,naresh,5000
(its just a example file)
and my output should be:
101,abhilash,1000
102,praveen,2000
103,partha,4000
104,naresh,5000
below is my code
cat input.dat |tr -d '\n' >... (6 Replies)
Hello all,
I have maybe a simple Problem - but I do not know to handle it.
All what I want, is to write a line to file without a newline at the end. It works with "echo -n" for all lines, but not for the last one. At the end of the file is always a "0a" (hex)
My small script:
... (10 Replies)
I have a file which comes every day and the file data look's as below.
Vi abc.txt
a|b|c|d\n
a|g|h|j\n
Some times we receive the file with only a new line character in the file like
vi abc.txt
\n (8 Replies)
Discussion started by: rak Kundra
8 Replies
LEARN ABOUT V7
sort
SORT(1) General Commands Manual SORT(1)NAME
sort - sort or merge files
SYNOPSIS
sort [ -_________x ] [ +pos1 [ -pos2 ] ] ... [ -o name ] [ -T directory ] [ name ] ...
DESCRIPTION
Sort sorts lines of all the named files together and writes the result on the standard output. The name `-' means the standard input. If
no input files are named, the standard input is sorted.
The default sort key is an entire line. Default ordering is lexicographic by bytes in machine collating sequence. The ordering is
affected globally by the following options, one or more of which may appear.
b Ignore leading blanks (spaces and tabs) in field comparisons.
d `Dictionary' order: only letters, digits and blanks are significant in comparisons.
f Fold upper case letters onto lower case.
i Ignore characters outside the ASCII range 040-0176 in nonnumeric comparisons.
n An initial numeric string, consisting of optional blanks, optional minus sign, and zero or more digits with optional decimal point, is
sorted by arithmetic value. Option n implies option b.
r Reverse the sense of comparisons.
tx `Tab character' separating fields is x.
The notation +pos1 -pos2 restricts a sort key to a field beginning at pos1 and ending just before pos2. Pos1 and pos2 each have the form
m.n, optionally followed by one or more of the flags bdfinr, where m tells a number of fields to skip from the beginning of the line and n
tells a number of characters to skip further. If any flags are present they override all the global ordering options for this key. If the
b option is in effect n is counted from the first nonblank in the field; b is attached independently to pos2. A missing .n means .0; a
missing -pos2 means the end of the line. Under the -tx option, fields are strings separated by x; otherwise fields are nonempty nonblank
strings separated by blanks.
When there are multiple sort keys, later keys are compared only after all earlier keys compare equal. Lines that otherwise compare equal
are ordered with all bytes significant.
These option arguments are also understood:
c Check that the input file is sorted according to the ordering rules; give no output unless the file is out of sort.
m Merge only, the input files are already sorted.
o The next argument is the name of an output file to use instead of the standard output. This file may be the same as one of the
inputs.
T The next argument is the name of a directory in which temporary files should be made.
u Suppress all but one in each set of equal lines. Ignored bytes and bytes outside keys do not participate in this comparison.
Examples. Print in alphabetical order all the unique spellings in a list of words. Capitalized words differ from uncapitalized.
sort -u +0f +0 list
Print the password file (passwd(5)) sorted by user id number (the 3rd colon-separated field).
sort -t: +2n /etc/passwd
Print the first instance of each month in an already sorted file of (month day) entries. The options -um with just one input file make the
choice of a unique representative from a set of equal lines predictable.
sort -um +0 -1 dates
FILES
/usr/tmp/stm*, /tmp/*: first and second tries for temporary files
SEE ALSO uniq(1), comm(1), rev(1), join(1)DIAGNOSTICS
Comments and exits with nonzero status for various trouble conditions and for disorder discovered under option -c.
BUGS
Very long lines are silently truncated.
SORT(1)