I must be missing something here. Can you post some code? I tried tail -fon the FIFO in one terminal, and then wrote a C program which opens the FIFO in "w" write mode. If the open fails, I use strerror(errno) to show the message and I don't get "Text file busy".

Here's the small C program to write to the FIFO I used: 

#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>

int main(void)
{
        char buf[100];
        int fd = open("file.fifo", O_NONBLOCK|O_WRONLY);
        if (fd < 0) {
                fprintf(stderr, "error (%d): %s\n", errno, strerror(er
+rno));
                return 1;
        }

        sprintf(buf, "%s\n", "a new line");
        int bytes = write(fd, buf, strlen(buf) + 1);

        printf("wrote %d bytes", bytes);

        close(fd);
        return 0;
}

[download]
Is this how you are opening the file? When I run this program without the tail -f in the other window, I get ERRNO 6, "Device not configured", not "Text file busy". If I use open without the O_NONBLOCK the program hangs in the open as we both expect.

---
echo S 1 [ Y V U | perl -ane 'print reverse map { $_ = chr(ord($_)-1) } @F;'
Warning: Any code posted by tuxz0r is untested, unless otherwise stated, and is used at your own risk.

In reply to Re^5: named pipe and "Text file busy" by tuxz0r
in thread named pipe and "Text file busy" by finpro

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