06-10-2005
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Please Help! :o
I have a main script (ksh) where another script is called (convert_picture). Normally this works ok, but since some changes has been made on the unix-server (I dont know what :( ) suddenly it doesnt work anymore: i get an error message: ksh: convert_picture not found. I am... (3 Replies)
Discussion started by: Rakker
3 Replies
2. Shell Programming and Scripting
hey guys. i have a bunch of programs in a script that needs to run as root and the rest as another user, we'll call him gabriel.
now, in this script, i want to run the first few lines as root. now, how do i, after running as root, tell the script to run the remaining lines as the user gabriel?... (3 Replies)
Discussion started by: Terrible
3 Replies
3. Shell Programming and Scripting
Hi
Please help me with the following problem with my script.
The following block of code is not repeating in the while loop and exiting after searching for first message.
input_file
==========
host001-01
host001-02
2008-07-23 13:02:04,651 ConnectionFactory - Setting session state... (2 Replies)
Discussion started by: pcjandyala
2 Replies
4. Shell Programming and Scripting
hi,,
i have perl scipt with line :
system('./try.sh $t $d $m');
in shell scipt try.sh i have the line:
echo $1
its not printing value of $t that i hav passed..y is it so..i am running it from apache web server (2 Replies)
Discussion started by: raksha.s
2 Replies
5. UNIX for Dummies Questions & Answers
Hello All. I have a script that is suppossed to start up a daemon but when executed, simply hangs. Could you please take a look and let me know where the problem might be? TIA
###################################################################
#
# SCRIPT: dstart3000.sh
# Bring up the Domain... (6 Replies)
Discussion started by: grin1dan
6 Replies
6. Shell Programming and Scripting
Hi everyone,
I got a problem with a script. What it's supposed to do is:
to take as arguments a directory name <dir> and a dimension (in byte) <dim>;
if <dir> exists, to write name and dimension of every regular file within it that sizes lesser than <dim> in regFileList.
Nothing happens... (10 Replies)
Discussion started by: Luke Bonham
10 Replies
7. Shell Programming and Scripting
Hi all,
I have a script that calls another program/script, xxx, to run in the background. Supposedly this program at most should finish within five (5) minutes so after five (5) minutes, I run some other steps to run the script into completion.
My problem is sometimes the program takes... (5 Replies)
Discussion started by: newbie_01
5 Replies
8. Shell Programming and Scripting
Hi ,
I have moduled my scripts in three scripts .
From First script i am calling second and from second i am calling third for some check .
Problem is with the third script call.
---In second script
EXP ='test.\abc.\Server.*abc.xml.*'
pid=$($HOME/bin/checkpid $EXP)
--Third... (2 Replies)
Discussion started by: amrishn
2 Replies
9. Shell Programming and Scripting
Hello,
Ubuntu server 11.10
can anybody help what is problem with my shell script?
#!/bin/bash
#script to find out currently logged on user is root or not.
if ]
then
echo "You are super"
else
echo "You are awesome!"
fi
When I run script, I get following output
./uid: line 3:
I... (4 Replies)
Discussion started by: kaustubh
4 Replies
10. Shell Programming and Scripting
Hi team,
I have a script in different folder. Now i want to call that script and execute that script from that path alone.
My code is
#!/bin/bash
wname=yahoo
PATH='/opt/IBM'
wac=`/usr/bin/ls $PATH | /usr/bin/grep "$wname"`
STOP=`/usr/bin/find $PATH/$wac -type f -name "stop.sh"`... (8 Replies)
Discussion started by: natraj005
8 Replies
TEE(2) Linux Programmer's Manual TEE(2)
NAME
tee - duplicating pipe content
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <fcntl.h>
ssize_t tee(int fd_in, int fd_out, size_t len, unsigned int flags);
DESCRIPTION
tee() duplicates up to len bytes of data from the pipe referred to by the file descriptor fd_in to the pipe referred to by the file
descriptor fd_out. It does not consume the data that is duplicated from fd_in; therefore, that data can be copied by a subsequent
splice(2).
flags is a series of modifier flags, which share the name space with splice(2) and vmsplice(2):
SPLICE_F_MOVE Currently has no effect for tee(); see splice(2).
SPLICE_F_NONBLOCK Do not block on I/O; see splice(2) for further details.
SPLICE_F_MORE Currently has no effect for tee(), but may be implemented in the future; see splice(2).
SPLICE_F_GIFT Unused for tee(); see vmsplice(2).
RETURN VALUE
Upon successful completion, tee() returns the number of bytes that were duplicated between the input and output. A return value of 0 means
that there was no data to transfer, and it would not make sense to block, because there are no writers connected to the write end of the
pipe referred to by fd_in.
On error, tee() returns -1 and errno is set to indicate the error.
ERRORS
EINVAL fd_in or fd_out does not refer to a pipe; or fd_in and fd_out refer to the same pipe.
ENOMEM Out of memory.
VERSIONS
The tee() system call first appeared in Linux 2.6.17; library support was added to glibc in version 2.5.
CONFORMING TO
This system call is Linux-specific.
NOTES
Conceptually, tee() copies the data between the two pipes. In reality no real data copying takes place though: under the covers, tee()
assigns data in the output by merely grabbing a reference to the input.
EXAMPLE
The following example implements a basic tee(1) program using the tee() system call.
#define _GNU_SOURCE
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
int
main(int argc, char *argv[])
{
int fd;
int len, slen;
if (argc != 2) {
fprintf(stderr, "Usage: %s <file>
", argv[0]);
exit(EXIT_FAILURE);
}
fd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
perror("open");
exit(EXIT_FAILURE);
}
do {
/*
* tee stdin to stdout.
*/
len = tee(STDIN_FILENO, STDOUT_FILENO,
INT_MAX, SPLICE_F_NONBLOCK);
if (len < 0) {
if (errno == EAGAIN)
continue;
perror("tee");
exit(EXIT_FAILURE);
} else
if (len == 0)
break;
/*
* Consume stdin by splicing it to a file.
*/
while (len > 0) {
slen = splice(STDIN_FILENO, NULL, fd, NULL,
len, SPLICE_F_MOVE);
if (slen < 0) {
perror("splice");
break;
}
len -= slen;
}
} while (1);
close(fd);
exit(EXIT_SUCCESS);
}
SEE ALSO
splice(2), vmsplice(2)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-05-04 TEE(2)