Dear All,
I want to get help for below case.
I have a file like this.
saman 1
gihan 2
saman 4
ravi 1
ravi 2
so i want to get the result,
saman 5
gihan 2
ravi 3 like this.
Pls help me. (17 Replies)
The file content is dynamic and using this format:
name1 number1
name2 number2
name3 number3
name4 number4
....................
Need a smooth way to calculate the sum of all the numbers in that file (number1 + number2 + number3 + number4........ = total ) (11 Replies)
I want to make a bash shell script that accepts as argument a file name (cars.txt) and: 1) calculates the total price per year and per model.
2) For each car that it's number starts with TK, I want to print the surname and name of the owner and the total cost for them.
NBE3452... (3 Replies)
Hi,
I wanted a script to find sum of files for a particular date, below is my script
ls -lrt *.req | nawk '$6 == "Aug"' | nawk '$7 == "1"'| awk '{sum = sum + $5} END {print sum}'
However, i get the error below
/usr/bin/ls: arg list too long
How do i fix that.
Many thanks before. (2 Replies)
Hello,
I'm trying to create a shell script (#!/bin/sh) which should tell me the age of a file in minutes...
I have a process, which delivers me all 15 minutes a new file and I want to have a monitoring script, which sends me an email, if the present file is older than 20 minutes.
To do... (10 Replies)
Hi All,
I need to calculat the sum of the particular field in text file. And the datatype of the field in file is decimal(18,2). If the file is small, then I am facing any problem. But the file is huge, then the result is converted into exponential format.
I tried using various command thr... (0 Replies)
In the awk I am trying to subtract the difference $3-$2 of each matching $4 before the first _ (underscore) and print that value in $13.
I think the awk will do that, but added comments. What I am not sure off is how to add a line or lines that will add sum each matching $13 value and put it in... (2 Replies)
Discussion started by: cmccabe
2 Replies
LEARN ABOUT DEBIAN
rfio_preseek64
RFIO_PRESEEK(3) Rfio Library Functions RFIO_PRESEEK(3)NAME
rfio_preseek - prefetch chunks of data from a file
SYNOPSIS
#include <sys/types.h>
#include "rfio_api.h"
int rfio_preseek (int s, const struct iovec *iov, int iovnb);
Under Linux, for large files:
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include "rfio_api.h"
int rfio_preseek64 (int s, const struct iovec64 *iov, int iovnb);
For large files, under other systems:
#include <sys/types.h>
#include "rfio_api.h"
int rfio_preseek64 (int s, const struct iovec64 *iov, int iovnb);
DESCRIPTION
rfio_preseek prefetches chunks of data at given offsets into an internal buffer (on the client side), using the descriptor s generated by a
previous rfio_open. The actual offset values and the lengths are given in the array of structures iov. The number of chunks is specified
by iovnb.
rfio_preseek64 does the prefetch for large files, using an array of structures of type iovec64 rather than an array of iovec.
RFIO_READOPT must be set to RFIO_READBUF, which is the default. The default internal buffer size is 128 kB, but the buffer size can be set
with an entry RFIO IOBUFSIZE in shift.conf. Then rfio_read gets the data from that buffer.
EXAMPLES
/* tpreseek - write NBRECORDS_TOWRITE records and
read back NBRECORDS_TOREAD using the rfio_preseek function */
#include <fcntl.h>
#include <stdio.h>
#if defined(_WIN32)
#include <winsock2.h>
#endif
#include "rfio_api.h"
#define NBRECORDS_TOREAD 5
#define NBRECORDS_TOWRITE 10
main(argc, argv)
int argc;
char **argv;
{
char buf[65536];
int errflg = 0;
int fd;
int i;
struct iovec iov[NBRECORDS_TOREAD];
int iovnb = NBRECORDS_TOREAD;
int j;
static int lengths[NBRECORDS_TOWRITE] = {4096, 32768, 16384, 8192,
65536, 32768, 16384, 4096, 65536, 8192};
static int records_toread[NBRECORDS_TOREAD] = {2, 4, 5, 8, 9};
#if defined(_WIN32)
WSADATA wsadata;
#endif
if (argc != 2) {
fprintf (stderr, "usage: tpreseek pathname
");
exit (1);
}
#if defined(_WIN32)
if (WSAStartup (MAKEWORD (2, 0), &wsadata)) {
fprintf (stderr, "WSAStartup unsuccessful
");
exit (2);
}
#endif
while (! errflg) {
/* Write variable length records.
* Each record is filled with the record index
*/
if ((fd = rfio_open (argv[1],
O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
rfio_perror ("rfio_open");
errflg++;
break;
}
for (j = 0; j < NBRECORDS_TOWRITE; j++) {
for (i = 0; i < lengths[j]; i++)
buf[i] = j;
if (rfio_write (fd, buf, lengths[j]) < 0) {
rfio_perror ("rfio_write");
errflg++;
break;
}
}
(void)rfio_close (fd);
if (errflg) break;
/* Prefetch a few records: the actual offsets and lengths
* of the records is set in the array of iov structures
*/
if ((fd = rfio_open (argv[1], O_RDONLY)) < 0) {
rfio_perror ("rfio_open");
errflg++;
break;
}
for (j = 0; j < NBRECORDS_TOREAD; j++) {
/* compute record offset */
iov[j].iov_base = 0;
for (i = 0; i < records_toread[j]; i++)
iov[j].iov_base = (char *) iov[j].iov_base +
lengths[i];
/* set length */
iov[j].iov_len = lengths[records_toread[j]];
}
if (rfio_preseek (fd, iov, iovnb) < 0) {
rfio_perror ("rfio_preseek");
errflg++;
break;
}
/* Read back the records and check their cpntents */
for (j = 0; j < NBRECORDS_TOREAD; j++) {
if (rfio_lseek (fd, (off_t) iov[j].iov_base,
SEEK_SET) < 0) {
rfio_perror ("rfio_lseek");
errflg++;
break;
}
if (rfio_read (fd, buf, iov[j].iov_len) < 0) {
rfio_perror ("rfio_read");
errflg++;
break;
}
for (i = 0; i < iov[j].iov_len; i++) {
if (buf[i] != records_toread[j]) {
fprintf (stderr,
"incorrect data read, record %d
",
records_toread[j]);
errflg++;
break;
}
}
if (errflg) break;
}
(void) rfio_close (fd);
break;
}
if (rfio_unlink (argv[1]) < 0) {
rfio_perror ("rfio_unlink");
errflg++;
}
#if defined(_WIN32)
WSACleanup();
#endif
exit (errflg ? 1 : 0);
}
RETURN VALUE
This routine returns 0 if the operation was successful or -1 if the operation failed. In the latter case, serrno is set appropriately.
ERRORS
EBADF s is not a valid descriptor.
EINVAL RFIO_READOPT is not set to RFIO_READBUF.
SENOSHOST Host unknown.
SENOSSERV Service unknown.
SETIMEDOUT Timed out.
SEBADVERSION Version ID mismatch.
SECONNDROP Connection closed by remote end.
SECOMERR Communication error.
SENORCODE Host did not return error number.
SEE ALSO rfio_lseek(3), rfio_open(3), rfio_read(3)AUTHOR
LCG Grid Deployment Team
LCG $Date: 2005/03/31 13:13:03 $ RFIO_PRESEEK(3)