06-08-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Could someone please tell me where I can get an explanation of the UNIX filenames and there functions, e.g. /usr, /etc, /var . (1 Reply)
Discussion started by: andy_power
1 Replies
2. UNIX for Advanced & Expert Users
Dears,
I use memtool to check the memory usage within a server, it runs Solaris 2.6; unfortunately memtool does not have a binary for SunOS 2.6 sparcv7. So I am a bit helpless in determining where exactlt the memory dedicated to File Cache has gone. Note that the server runs a relational data... (0 Replies)
Discussion started by: JimJim
0 Replies
3. HP-UX
Hi
I am facing the problem where my HP Unix system date is in accordance with the current date but the logs written by the same is of previous time stamp.
Eg. System Date - Thu Mar 15 18:00:04 IST 2007
Syslogs -
Mar 15 12:30:10 mac@1 ftpd: FTP LOGIN FROM xx.xxx.xxx.xx , main
The ftp... (1 Reply)
Discussion started by: PradeepRed
1 Replies
4. HP-UX
hi everybody,
i m AIX guy....
due 2 some reason i was also askd 2 work in HP-UX
so i think all d concepts r same as AIX....
so i thought it s easy to learn by comparitve study....
if so
then wr can i get the materials????????
thanks in advance........ (1 Reply)
Discussion started by: rrlog
1 Replies
5. Shell Programming and Scripting
Hi,
Can anyone provide me with the Code Review Checklist for Shell scripts ??
Thanks in advance. (2 Replies)
Discussion started by: Shivdatta
2 Replies
6. Shell Programming and Scripting
Hi,
I have below requirement that I need to do it using AWK.
Files
====
File1: data file that has thousands of recs
File2: Lookup file
I need to compare the position 21-31 of File1 with 1-11 of File2.
If matched then write to new output file(outfile1) else write to another output... (17 Replies)
Discussion started by: Sathy153
17 Replies
7. Shell Programming and Scripting
Task:
Short Description: To find the files in a particular directory for the previous day, sort them by date and time and e-mail it across to a particular id.
And the time is divided into eight fields and based on the time the respective field should be updated with the flag 1.
Eight... (7 Replies)
Discussion started by: venkatesht
7 Replies
8. Shell Programming and Scripting
Hi,
I need someone's help in writing a shell script. Since am very new i am stuck .
I have 2 files in the same dir.
==============================================
FileA
Table1~07/07/2009 00:00:00~4
Table1~07/06/2009 00:00:00~41
Table1~07/08/2009 00:00:00~4
... (8 Replies)
Discussion started by: vijayarajvp
8 Replies
9. Shell Programming and Scripting
Hi,
i have a script of following content
#!/usr/bin/sh
'exit 255' USR1
ncm_CheckDir.pl -a
/cnt/mgr/test/working/applog_CheckDir.log -c
/cnt/mgr/test/lib/config/bp_CheckDir.conf -s
/cnt/mgr/test/log/syslog
filename : BC_CheckDir
when i execute ie :
sh BC_CheckDir
i am getting... (11 Replies)
Discussion started by: psthariharan
11 Replies
10. Shell Programming and Scripting
Hi guys,
I am new to shell scripting and I need urgent assistance.
I have an xml like :
<AgreementNumberFull>13-WY-84252</AgreementNumberFull>
<AgreementNumberAbbr>WY84252</AgreementNumberAbbr>
<LineOfBusiness>F</LineOfBusiness>
<CompanyCode>0005</CompanyCode>
<UniqDigit/>
<StateCode/>
... (9 Replies)
Discussion started by: puneetkanchi
9 Replies
LEARN ABOUT PHP
posix_madvise
POSIX_MADVISE(3) Linux Programmer's Manual POSIX_MADVISE(3)
NAME
posix_madvise - give advice about patterns of memory usage
SYNOPSIS
#include <sys/mman.h>
int posix_madvise(void *addr, size_t len, int advice);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
posix_madvise():
_POSIX_C_SOURCE >= 200112L
DESCRIPTION
The posix_madvise() function allows an application to advise the system about its expected patterns of usage of memory in the address range
starting at addr and continuing for len bytes. The system is free to use this advice in order to improve the performance of memory
accesses (or to ignore the advice altogether), but calling posix_madvise() shall not affect the semantics of access to memory in the speci-
fied range.
The advice argument is one of the following:
POSIX_MADV_NORMAL
The application has no special advice regarding its memory usage patterns for the specified address range. This is the default
behavior.
POSIX_MADV_SEQUENTIAL
The application expects to access the specified address range sequentially, running from lower addresses to higher addresses.
Hence, pages in this region can be aggressively read ahead, and may be freed soon after they are accessed.
POSIX_MADV_RANDOM
The application expects to access the specified address range randomly. Thus, read ahead may be less useful than normally.
POSIX_MADV_WILLNEED
The application expects to access the specified address range in the near future. Thus, read ahead may be beneficial.
POSIX_MADV_DONTNEED
The application expects that it will not access the specified address range in the near future.
RETURN VALUE
On success, posix_madvise() returns 0. On failure, it returns a positive error number.
ERRORS
EINVAL addr is not a multiple of the system page size or len is negative.
EINVAL advice is invalid.
ENOMEM Addresses in the specified range are partially or completely outside the caller's address space.
VERSIONS
Support for posix_madvise() first appeared in glibc version 2.2.
CONFORMING TO
POSIX.1-2001.
NOTES
POSIX.1 permits an implementation to generate an error if len is 0. On Linux, specifying len as 0 is permitted (as a successful no-op).
In glibc, this function is implemented using madvise(2). However, since glibc 2.6, POSIX_MADV_DONTNEED is treated as a no-op, because the
corresponding madvise(2) value, MADV_DONTNEED, has destructive semantics.
SEE ALSO
madvise(2), posix_fadvise(2)
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/.
Linux 2017-09-15 POSIX_MADVISE(3)