I tried opening the files in a directory and print thier names.
But it was thowing the error "unable to open directorty at t5.pl line 2."
Can u plz correct this error in below mentioned code.
#!/data/scoredev/perl
opendir(HOMEDIR,"c:\vin") || die("unable to open directorty");... (3 Replies)
hi I have unusual problem you might say. I can't open microsoft.com , I've checked file hosts located somewhere in windows/system32/drivers .. and its not blocked from there, what else could cause this problem, I need to download microsoft visual studio and I can't cause I can't open the website,... (1 Reply)
Hi,
I have written a function which will open the file with the input name provided.Input name is in string format so while opening I am converting it using c_str().detail code below Plz let me know what is the wrong in code.
1 #include<iostream>
2 #include<fstream>
3 ... (4 Replies)
Hi,
I have a linux which I am accessing using putty.I have written some code in TCL-Tk & developed a GUI based app.I knew that it is difficult to open a GUI based app. from putty,but there must be some way to do that.
If anybody knows any such workarounds kindly let me know.
Shell I am using is... (4 Replies)
Hello,
I know nothing about UNIX, ftp, etc. I am building an excel VBA macro which calls a .bat file. I've taken a pre-existing batch file and am trying to modify it to fit my purposes. I would be very grateful for some assistance.
Here is my .bat file:
echo off
set... (9 Replies)
Hello there
Im wondering is there any way to see lpar OS info (like 5.3 or 6.1) in HMC web GUI?
Because in some situation, the lpar is inactive, the only way to check OS version is to activate, this process takes time :)
Tks! (8 Replies)
Hello,
One one of my AIX boxes I'm having the following errror:
fcstat fcs0:
Port Speed (supported): 4 GBIT
Error opening device: /dev/fscsi0
errno: 0000003d
Has anyone encountered similar errors?
Thank you! (1 Reply)
I have Solaris-10 zone, where I can open firefox in GUI via MobaXterm with root user, but when I try to open it with non root user, it fails with below error
$ which firefox
/usr/bin/firefox
$ firefox
ld.so.1: firefox-bin: fatal: relocation error: file... (6 Replies)
python gui or c++ gui or java gui?
and when to use etch one? (1 Reply)
Discussion started by: kaja
1 Replies
LEARN ABOUT V7
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)