Date: Sat, 29 Jul 2000 13:18:47 +0900 From: Hiroyuki Hanai <hanai@imgsrc.co.jp> To: current@FreeBSD.org Cc: markm@FreeBSD.org Subject: fcntl and /dev/random Message-ID: <8266pp602g.wl@darkmatter.imgsrc.co.jp>
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Setting status flags using F_SETFL command of fcntl(2) on the file
descriptor, which is returned by open(2)ing /dev/random, seems not to
be supported. For example, when I run following code;
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
main()
{
int fd;
fd = open("/dev/random", O_RDONLY);
if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
printf("%s\n", strerror(errno));
}
}
3.4-RELEASE(and possibly 3.5 and 3.5.1) and 4.1-RELEASE/4.1-STABLE say
`Inappropriate ioctl for device' and 5-current says `Operation not
supported by device'.
I've found above in BIND9's source and its `named' program complains
everytime it's invoked.
Should I fix BIND9's code? or wait for fcntl's F_SETFL being
supported on FreeBSD?
Actually, in BIND9, fd is already open(2)ed with `O_RDONLY | O_NONBLOCK'
and setting O_NONBLOCK status with fcntl(2) is not needed, which means
that fixing BIND9's code is very simple; just comment out the fcntl(2)ing line.
h.hanai
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