Yep,
I only wanted to point out that the AWK redirection is different from the shell redirection. From Effective AWK Programming:
Quote:
When this type of redirection is used, the output file is erased before the first
output is written to it. Subsequent writes to the same output file do not erase
output file, but append to it. (This is different from how you use redirections in
shell scripts.) If output file does not exist, it is created.
Hi All,
Please help me out with a script which checks whether a given file say abc.txt is in ASCII format and data is tab-delimited. If the condition doesn't satisfy then it should generate error code "100" for file not in ASCII format and "105" if it is not in tab-delimited format.
If the... (9 Replies)
Hi,
I have a date field in my input file.
I just want to check if its in the format "DD-MM-YYYY".
Is there any command which can achieve this?
Thanks and Regards,
Abhishek (2 Replies)
I have to find the specific formatted file is present in the received list in the directory, for which I have written:
file_list=`ls -lrt /tmp/vinay/act/files |grep "$cdate"| awk '{print $9}'`
while read fileStr
do
find $file_list $fileStr > /dev/null
status=`echo $?`
if ; then
... (3 Replies)
Hi,
I am writting a script, which accepts input file as parameter.
Input file name is aa_bb_cc_dd_ee.<ext>
I need to check that input file name should be of 5 fileds.
Please help me out. :confused: (7 Replies)
My source file having one date column. The formate of the date column is yyyymm. I need to validate whether all the rows are in same format in the given file. If it is not I have captured that records in a separate file. I am very new to Unix. I don't how to achieve this. Plz help me to achieve... (2 Replies)
hi there
I have file names in different format as below
triss_20111117_fxcb.csv
triss_fxcb_20111117.csv
xpnl_hypo_reu_miplvdone_11172011.csv
xpnl_hypo_reu_miplvdone_11-17-2011.csv
xpnl_hypo_reu_miplvdone_20111117.csv
xpnl_hypo_reu_miplvdone_20111117xfb.csv... (10 Replies)
Hi All,
I am trying to check if the file is in dos format using simple grep command but the problem is lines inside the file with have special characters in between and in some lines end of the line will have the '^M' character.
I tried the below command in simple line(without special... (7 Replies)
Hi Experts,
path=/db/files/
format=$1
User can enter any file format.compare the user file format with actual file format existed in the directory /db/files. User enter all characters as "A" apart from date format.
example1: user will be entering the file format AAA_AA_YYYYMMDD.AAA
Actual... (6 Replies)
How can I script to check telephone number entered by user in a uniz script:
print -n "Enter telephone number to check ? " ; read telno
How do I script to :
1) Check if entered without dashes or with dashes
2) If without dashes how can I check:
if telno is only 10... (2 Replies)
So, i have this requirement where i need to check the file format, whether it's EBCDIC or ASCII, and based on format retrieve the information from that file:
my file is:
file1.txt-->this ebcdic file
file2.txt-->ascii file
i tried below code:
file=file1.txt
type="`file $file`"
i get... (7 Replies)
Discussion started by: gnnsprapa
7 Replies
LEARN ABOUT NETBSD
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-beflnstuv] [-] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command line order. A
single dash represents the standard input, and may appear multiple times in the file list.
The word ``concatenate'' is just a verbose synonym for ``catenate''.
The options are as follows:
-b Implies the -n option but doesn't number blank lines.
-e Implies the -v option, and displays a dollar sign ('$') at the end of each line as well.
-f Only attempt to display regular files.
-l Set an exclusive advisory lock on the standard output file descriptor. This lock is set using fcntl(2) with the F_SETLKW command.
If the output file is already locked, cat will block until the lock is acquired.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Implies the -v option, and displays tab characters as '^I' as well.
-u The -u option guarantees that the output is unbuffered.
-v Displays non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ascii characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), hexdump(1), lpr(1), more(1), pr(1), tail(1), view(1), vis(1), fcntl(2)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is expected to conform to the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-belnstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed! This is performed by the shell before cat is run.
BSD September 23, 2006 BSD