There's no standard, portable way to do this. Like ghostbusters, you're not supposed to cross the streams. But g++ iostreams do have some extensions to make it possible. Adapting an example found here I tried this:
Code:
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <iostream>
#include <ext/stdio_filebuf.h> // __gnu_cxx::stdio_filebuf
using namespace std;
int main(void)
{
std::string str;
int fd=open("whatever", O_RDONLY); // Get an FD
FILE *fp=fdopen(fd, "r"); // convert it into a FILE *
// create a file buffer(NOT an iostream yet) from FILE *
__gnu_cxx::stdio_filebuf<char> fb (fp, ios_base::in);
istream fs (&fb); // create a stream from file buffer
fs >> str;
cout << str << endl;
return(0);
}
Testing this on a file containing 'asdf' it does print asdf, so while a bit tortuous it does actually work. It being that tortuous also makes it plain that you are using an extension, which is probably the point...
I don't know if the stdio_filebuf closes the FILE * for you when it goes out of scope or not.
Hi all,
i wanted to port some HP-UX code to linux. can anybody point to some documents or resources that would help me in doing the porting..
thanks in advance
Arun Prakash (0 Replies)
Gents,
i'm a senior applications developer and need to port a Linux server application ( no additional / special libraries or unique header files ) to a HPUX enviroment.
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helo,
i m porting HP-UX socket application to Linux SSL-socket application.
I have use htonl() in HP-UX.
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Hello All,
I have a code of DHCP which is implemented on Linux. During porting this code from Linux to VxWorks, I come up with following errors:-
jects\freedom\ap\udhcp\socket.c
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Discussion started by: shafi2all
1 Replies
LEARN ABOUT DEBIAN
hardened-cc
HARDENED-CC(1) Debian GNU/Linux HARDENED-CC(1)NAME
hardened-cc - gcc wrapper to enforce hardening toolchain improvements
SYNOPSIS
export DEB_BUILD_HARDENING=1
gcc ...
DESCRIPTION
The hardened-cc wrapper is normally used by calling gcc as usual when DEB_BUILD_HARDENING is set to 1. It will configure the necessary
toolchain hardening features. By default, all features are enabled. If a given feature does not work correctly and needs to be disabled,
the corresponding environment variables mentioned below can be set to 0.
ENVIRONMENT
DEB_BUILD_HARDENING=1
Enable hardening features.
DEB_BUILD_HARDENING_DEBUG=1
Print the full resulting gcc command line to STDERR before calling gcc.
DEB_BUILD_HARDENING_STACKPROTECTOR=0
Disable stack overflow protection. See README.Debian for details.
DEB_BUILD_HARDENING_RELRO=0
Disable read-only linker sections. See README.Debian for details.
DEB_BUILD_HARDENING_FORTIFY=0
Don't fortify several standard functions. See README.Debian for details.
DEB_BUILD_HARDENING_PIE=0
Don't build position independent executables. See README.Debian for details.
DEB_BUILD_HARDENING_FORMAT=0
Disable unsafe format string usage errors. See README.Debian for details.
NOTES
System-wide settings can be added to /etc/hardening-wrapper.conf, one per line.
The real gcc symlinks are renamed gcc.real, and a diversion is registered with dpkg-divert(1). Thus hardened-cc's idea of the default gcc
is dictated by whatever package installed /usr/bin/gcc.
SEE ALSO hardened-ld(1)gcc(1)Debian Project 2008-01-08 HARDENED-CC(1)
01-04-2011
But g++ iostreams do have some extensions to make it possible. Adapting an example found here I tried this: