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-rw-r--r--libblkid/randutils.c125
1 files changed, 0 insertions, 125 deletions
diff --git a/libblkid/randutils.c b/libblkid/randutils.c
deleted file mode 100644
index 80893d3db..000000000
--- a/libblkid/randutils.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * General purpose random utilities
- *
- * Based on libuuid code.
- *
- * This file may be redistributed under the terms of the
- * GNU Lesser General Public License.
- */
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/time.h>
-
-#include <sys/syscall.h>
-
-#include "randutils.h"
-
-#ifdef HAVE_TLS
-#define THREAD_LOCAL static __thread
-#else
-#define THREAD_LOCAL static
-#endif
-
-#if defined(__linux__) && defined(__NR_gettid) && defined(HAVE_JRAND48)
-#define DO_JRAND_MIX
-THREAD_LOCAL unsigned short ul_jrand_seed[3];
-#endif
-
-int random_get_fd(void)
-{
- int i, fd;
- struct timeval tv;
-
- gettimeofday(&tv, 0);
- 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);
-
-#ifdef DO_JRAND_MIX
- ul_jrand_seed[0] = getpid() ^ (tv.tv_sec & 0xFFFF);
- ul_jrand_seed[1] = getppid() ^ (tv.tv_usec & 0xFFFF);
- ul_jrand_seed[2] = (tv.tv_sec ^ tv.tv_usec) >> 16;
-#endif
- /* Crank the random number generator a few times */
- gettimeofday(&tv, 0);
- for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--)
- rand();
- return fd;
-}
-
-
-/*
- * Generate a stream of random nbytes into buf.
- * Use /dev/urandom if possible, and if not,
- * use glibc pseudo-random functions.
- */
-void random_get_bytes(void *buf, size_t nbytes)
-{
- size_t i, n = nbytes;
- int fd = random_get_fd();
- int lose_counter = 0;
- unsigned char *cp = (unsigned char *) buf;
-
- if (fd >= 0) {
- while (n > 0) {
- ssize_t x = read(fd, cp, n);
- if (x <= 0) {
- if (lose_counter++ > 16)
- break;
- continue;
- }
- n -= x;
- cp += x;
- lose_counter = 0;
- }
-
- close(fd);
- }
-
- /*
- * We do this all the time, but this is the only source of
- * randomness if /dev/random/urandom is out to lunch.
- */
- for (cp = buf, i = 0; i < nbytes; i++)
- *cp++ ^= (rand() >> 7) & 0xFF;
-
-#ifdef DO_JRAND_MIX
- {
- unsigned short tmp_seed[3];
-
- memcpy(tmp_seed, ul_jrand_seed, sizeof(tmp_seed));
- ul_jrand_seed[2] = ul_jrand_seed[2] ^ syscall(__NR_gettid);
- for (cp = buf, i = 0; i < nbytes; i++)
- *cp++ ^= (jrand48(tmp_seed) >> 7) & 0xFF;
- memcpy(ul_jrand_seed, tmp_seed,
- sizeof(ul_jrand_seed)-sizeof(unsigned short));
- }
-#endif
-
- return;
-}
-
-#ifdef TEST_PROGRAM
-int main(int argc __attribute__ ((__unused__)),
- char *argv[] __attribute__ ((__unused__)))
-{
- unsigned int v, i;
-
- /* generate and print 10 random numbers */
- for (i = 0; i < 10; i++) {
- random_get_bytes(&v, sizeof(v));
- printf("%d\n", v);
- }
-
- return EXIT_SUCCESS;
-}
-#endif /* TEST_PROGRAM */