2 * Copyright (c) 2001, 2003, 2004, 2008-2010
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <sys/types.h>
30 #endif /* HAVE_STDLIB_H */
34 #endif /* HAVE_UNISTD_H */
35 #if TIME_WITH_SYS_TIME
41 static unsigned int get_random __P((void));
42 static void seed_random __P((void));
44 #define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
45 #define NUM_CHARS (sizeof(TEMPCHARS) - 1)
48 #define INT_MAX 0x7fffffff
56 char *start, *cp, *ep;
57 const char *tempchars = TEMPCHARS;
58 unsigned int r, tries;
61 for (ep = path; *ep; ep++)
63 if (path + slen >= ep) {
70 for (start = ep; start > path && start[-1] == 'X'; start--) {
71 if (tries < INT_MAX / NUM_CHARS)
77 for (cp = start; *cp; cp++) {
78 r = get_random() % NUM_CHARS;
82 fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
83 if (fd != -1 || errno != EEXIST)
93 # define SRAND srandom
94 # define SEED_T unsigned int
98 # define SRAND srand48
103 # define SEED_T unsigned int
114 * Seed from time of day and process id multiplied by small primes.
117 seed = (tv.tv_sec % 10000) * 523 + tv.tv_usec * 13 +
118 (getpid() % 1000) * 983;
125 static int initialized;
132 return(RAND() & 0xffffffff);