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Set FD_CLOEXEC on the /dev/random file descriptor used by libuuid

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This avoids a fd leak across an execve() which was causing problems
for the LVM tools.

(Addresses Debian Bug: #345832)

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2006-01-06 18:10:02 -05:00
parent 22fe674da4
commit 2adc320f01
2 changed files with 11 additions and 0 deletions
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6
lib/uuid/ChangeLog
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@ -1,3 +1,9 @@
2006-01-06 Theodore Ts'o <tytso@mit.edu>
* gen_uuid.c (get_random_fd): Set the FD_CLOEXEC flag on the file
descriptor so that it will get closed across an execve().
(Addresses Debian Bug #345832)
2005-12-10 Theodore Ts'o <tytso@mit.edu>
* Makefile.in: Add a dependency to make sure that the

5
lib/uuid/gen_uuid.c
View File

@ -88,6 +88,11 @@ static int get_random_fd(void)
fd = open("/dev/urandom", O_RDONLY);
if (fd == -1)
fd = open("/dev/random", O_RDONLY | O_NONBLOCK);
if (fd >= 0) {
i = fcntl(fd, F_GETFD);
if (i >= 0)
fcntl(fd, F_SETFD, i | FD_CLOEXEC);
}
srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec);
}
/* Crank the random number generator a few times */