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* random.c (random_seed): don't use /dev/urandom if it is not character device.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2005-01-03 05:13:18 +00:00
parent f0041381da
commit 1b27958bfb
2 changed files with 20 additions and 3 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Mon Jan 3 14:01:54 2005 Tanaka Akira <akr@m17n.org>
* random.c (random_seed): don't use /dev/urandom if it is not
character device.
Mon Jan 3 11:37:42 2005 Tanaka Akira <akr@m17n.org>
* random.c (random_seed): use /dev/urandom if available.

18
random.c
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@ -175,17 +175,29 @@ random_seed()
unsigned long result;
int fd;
unsigned long buf;
struct stat statbuf;
gettimeofday(&tv, 0);
result = tv.tv_sec ^ tv.tv_usec ^ getpid() ^ n++;
result += (unsigned long)&result;
if ((fd = open("/dev/urandom", O_RDONLY)) >= 0) {
read(fd, &buf, sizeof(buf));
#ifdef S_ISCHR
if ((fd = open("/dev/urandom", O_RDONLY|O_NONBLOCK
#ifdef O_NOCTTY
|O_NOCTTY
#endif
#ifdef O_NOFOLLOW
|O_NOFOLLOW
#endif
)) >= 0) {
if (fstat(fd, &statbuf) == 0 && S_ISCHR(statbuf.st_mode)) {
read(fd, &buf, sizeof(buf));
result ^= buf;
}
close(fd);
result ^= buf;
}
#endif
return result;
}