12-17-2012
Check man ping on that system (I'm guessing it is Solaris) to get explanation of 5 2. 2>&1 is a redirection technique, allowing to "merge" standard error messages into standard output stream.
This User Gave Thanks to bartus11 For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
zsh 4.3.4% cat file
ACFCFACCACARCSHFARCVJVASTVAJFTVAJVGHBAJ
zsh 4.3.4% cat file1
A
C
F
R
zsh 4.3.4% <file1 while read;do printf "%s=%d\n" "$REPLY" "${#$(<file)//}";done
A=9
C=7
F=4
R=2
That was the previous post.
But , can anybody can explain me in detail about this line
zsh... (2 Replies)
Discussion started by: dummy_needhelp
2 Replies
2. Shell Programming and Scripting
I did not understand what is ${0##/}
PGM=${0##/}
TMP=/tmp/${PGM}.$$
Please explain me. (2 Replies)
Discussion started by: gadege
2 Replies
3. Shell Programming and Scripting
could u please convert the below statement to shell script
----------
logdir=/smp/dyn/logfiles/cpm/pgm/pgIm
$logdir = $logdir ."/pgIm${toDate}*";
----
could u please explain the below clearly
grep -i adding $logdir | grep -iv equation | awk '{print \$NF}' | sort -u | sed -e... (1 Reply)
Discussion started by: mail2sant
1 Replies
4. AIX
this is the mksys b script....
can anyone explain .. what # and 1 in if condition
this is the first line of the script... it is not from middle of the script....
if
then
echo "Not enough parameters, need a client name for mksysb"
Usage="Usage: $0 <client name>"
... (2 Replies)
Discussion started by: honeym210
2 Replies
5. UNIX for Dummies Questions & Answers
if
then
echo "Syntax: $0 <sid> <COLD/HOT> <DEST>"
exit
fi
if --------------what does this mean???
echo "Syntax: $0 <sid> <COLD/HOT> <DEST>"---pls explain this as well (2 Replies)
Discussion started by: appsdba.nitin
2 Replies
6. Shell Programming and Scripting
hi all i have an example i want one help me to understand cause i tried to test it but almost fail and i don't know how can i solve this problem " the main idea to read from two files and replace something from one to another " but i don't understand why it fail all time
$ cat main.txt... (4 Replies)
Discussion started by: maxim42
4 Replies
7. Shell Programming and Scripting
Hello,
is it possible to give grep two documents to surche for? like
grep "test" /home/one.txt AND /home/two.txt ?
thanks (1 Reply)
Discussion started by: Cybertron
1 Replies
8. Shell Programming and Scripting
why the case 2 will happen ? , ' should stop the history substitution ,shouldn't it?
case 1
# echo "123"|sed '/123/!d'
123
case 2
# echo "123
> 456
> 1
> "|sed '/123/!d'
-bash: !d': event not found
case 3
# echo "123
> 456
> 12
> "|sed '/123/'\!d
123
# bash --version (1 Reply)
Discussion started by: justlooks
1 Replies
9. Shell Programming and Scripting
Can someone do me a favour and explain the following for me:
((r=$RANDOM%$n+1))
I know what $RANDOM does but what is % sign and what does it do with %$n+1? (2 Replies)
Discussion started by: bashily
2 Replies
10. UNIX for Dummies Questions & Answers
Hi friends! I'm learning UNIX and I have a small question. Working with Shell, i put the name of one executable (in c language) + one number and it says this:
$ gcc misterioso_4.c
$ ./misterioso_4 6
got: ,
I can not find an answer in the manual because I havent applied any variable.... (5 Replies)
Discussion started by: dakota
5 Replies
FPURGE(3) Linux Programmer's Manual FPURGE(3)
NAME
fpurge, __fpurge - purge a stream
SYNOPSIS
/* unsupported */
#include <stdio.h>
int fpurge(FILE *stream);
/* supported */
#include <stdio.h>
#include <stdio_ext.h>
void __fpurge(FILE *stream);
DESCRIPTION
The function fpurge() clears the buffers of the given stream. For output streams this discards any unwritten output. For input streams
this discards any input read from the underlying object but not yet obtained via getc(3); this includes any text pushed back via ungetc(3).
See also fflush(3).
The function __fpurge() does precisely the same, but without returning a value.
RETURN VALUE
Upon successful completion fpurge() returns 0. On error, it returns -1 and sets errno appropriately.
ERRORS
EBADF stream is not an open stream.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+-----------+---------------+---------------------+
|Interface | Attribute | Value |
+-----------+---------------+---------------------+
|__fpurge() | Thread safety | MT-Safe race:stream |
+-----------+---------------+---------------------+
CONFORMING TO
These functions are nonstandard and not portable. The function fpurge() was introduced in 4.4BSD and is not available under Linux. The
function __fpurge() was introduced in Solaris, and is present in glibc 2.1.95 and later.
NOTES
Usually it is a mistake to want to discard input buffers.
SEE ALSO
fflush(3), setbuf(3), stdio_ext(3)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
2017-09-15 FPURGE(3)