Hello,
I need to insert a line (like a header) as the first line of a very huge file (about 3 ml rows). I am able to do it with sed, but redirecting the output and creating a new file takes quite some time. I was wondering if there was a more efficient way of doing it?
Any help would be... (3 Replies)
when directing some text into a file can you choose where it goes like the top of the file (which is text aswell) or the middle??
if so how - especially would like to know how to do so in vi (text editor)
If i were to enter an argument ($1) into a another argument ($2)
would it would be... (6 Replies)
hi,
My code is
#!/bin/sh
echo "\n\nPlease enter the month of the year(YYYYMM) : \c"
read date_rep
INPUT_L9_FILE=L9_Recharge_Description_EOM_$date_rep.csv
#This part is used to summarise Grand_Total, Balance_Total of file L9_Recharge_Description_EOM_${1}.csv.
awk -F"," '{if(NR!=1)... (5 Replies)
Hi,
I need to insert a new line containing the string "QUERY" above every 5 lines.
The below piece of code inserts a new line after every 5th line
awk '{print $0} !(NR%5) {print "QUERY"}'
sed 'n;n;n;n;G;' --> I do not know how to give "QUERY" string here
But I need to insert it before... (4 Replies)
I'm trying to take mrt output and put it at the top of a file along with the date and time. I was able to do it at the bottom of the file with the following
printf "********** $(date) **********\n\n" >> $OUTPUT_PATH/$HOSTNAME
mtr -r -w -c 10 $HOSTADDRESS >> $OUTPUT_PATH/$HOSTNAME
printf... (2 Replies)
I have a test file that I want to read and insert only certain lines into the
the table based on a filter.
1. Rread the log file 12 Hours back Getdate() -12 Hours
2. Extract the following information on for lines that say "DUMP is
complete"
A. Date
B. Database Name
C.... (2 Replies)
Hi All,
I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise
My intention is to insert a line of text after 13th line of every file inside a particular directory.
While trying to do it for a single file , i am using sed
sed '3 i this is the 4th line' filename
sed: command garbled: 3... (5 Replies)
Discussion started by: gotamp
5 Replies
LEARN ABOUT SUNOS
tmpfile
tmpfile(3C) Standard C Library Functions tmpfile(3C)NAME
tmpfile - create a temporary file
SYNOPSIS
#include <stdio.h>
FILE *tmpfile(void);
DESCRIPTION
The tmpfile() function creates a temporary file and opens a corresponding stream. The file will automatically be deleted when all refer-
ences to the file are closed. The file is opened as in fopen(3C) for update (w+).
The largest value that can be represented correctly in an object of type off_t will be established as the offset maximum in the open file
description.
RETURN VALUES
Upon successful completion, tmpfile() returns a pointer to the stream of the file that is created. Otherwise, it returns a null pointer and
sets errno to indicate the error.
ERRORS
The tmpfile() function will fail if:
EINTR A signal was caught during the execution of tmpfile().
EMFILE There are OPEN_MAX file descriptors currently open in the calling process.
ENFILE The maximum allowable number of files is currently open in the system.
ENOSPC The directory or file system which would contain the new file cannot be expanded.
The tmpfile() function may fail if:
EMFILE There are FOPEN_MAX streams currently open in the calling process.
ENOMEM Insufficient storage space is available.
USAGE
The stream refers to a file which is unlinked. If the process is killed in the period between file creation and unlinking, a permanent
file may be left behind.
The tmpfile() function has a transitional interface for 64-bit file offsets. See lf64(5).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO unlink(2), fopen(3C), mkstemp(3C), mktemp(3C), tmpnam(3C), lf64(5), standards(5)SunOS 5.10 4 Aug 2003 tmpfile(3C)