On Thu, Mar 11, 2004 at 01:10:16AM +1100, Matthew Wlazlo wrote:
> Ok let's try that again (hope i read the question right this time!)
>
> using namespace std;
> using namespace __gnu_cxx;
>
> ....
>
> int fd = open("test.txt", O_RDONLY);
> stdio_filebuf<char> in(fd, ios::in, false, 1024);
> istream inf(&in);
>
> string str;
> while(!inf.eof()) {
> inf >> str;
> cout << str << endl;
> }
>
> close(fd);
Thanks! I modified that program to use popen,
added the required headers, did a bit of error checking
and stuff and got the following. Tested under
solaris/gcc3.3.1 and fedora/gcc3.3.2:
Note that I needed to change your if (!feof...).
because I was getting "world" twice. I guess
that was a bug. Anyway while(inf << ...) is
more idiomatic imho. I got the same bug with
fopen as well as popen, fwiw.
#include <iostream>
#include <cstdio>
#include <ext/stdio_filebuf.h>
using namespace std;
using namespace __gnu_cxx;
int
main()
{
FILE* fp = popen("echo hello, world", "r");
if (0 == fp) {
perror("popen");
return 1;
}
stdio_filebuf<char> in(fp, ios::in);
istream inf(&in);
string str;
while(inf >> str)
{
cout << str << endl;
}
cout << flush;
if (-1 == fclose(fp)) {
perror("fclose");
return 1;
}
}
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