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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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