Re: a ld_preload to get rvplayer working

Thomas Sailer (sailer@ife.ee.ethz.ch)
Thu, 19 Nov 1998 11:52:26 +0100

Paul wrote:
>
> An easy fix to get RealPlayer working with the development kernels is to
> compile this program as a shared library and LD_PRELOAD it before running
> rvplayer. What it does is turnes off the nonblocking bit for all open()s.
> Works for me using glibc 2.1
>
> #define O_NONBLOCK 04000
> extern int libc_open(const char *, int);
> int open(const char *pathname, int flags)
> {
> if (flags & O_NONBLOCK)
> flags &= ~O_NONBLOCK;
> return(__open(pathname, flags));
> }

Well, something like the following is probably nearer
to what rvplayer intends to do :-)

Tom

#include <string.h>
#include <unistd.h>
#include <fcntlbits.h>

extern int __open(const char *pathname, int flags, mode_t mode);
extern int fcntl(int fd, int cmd, long arg);

int open(const char *pathname, int flags, mode_t mode)
{
int res, rstnblk = flags & O_NONBLOCK && !strcmp(pathname,
"/dev/dsp");

res = __open(pathname, flags, mode);
if (res == -1 || !rstnblk)
return res;
fcntl(res, F_SETFL, fcntl(res, F_GETFL, 0) & ~O_NONBLOCK);
return res;
}

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