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/*
* Copyright (c) 2001, 2003, 2004, 2008-2010
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#include <ctype.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#if TIME_WITH_SYS_TIME
# include <time.h>
#endif
#include "sudo.h"
static unsigned int get_random __P((void));
static void seed_random __P((void));
#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
#define NUM_CHARS (sizeof(TEMPCHARS) - 1)
#ifndef INT_MAX
#define INT_MAX 0x7fffffff
#endif
int
mkstemps(path, slen)
char *path;
int slen;
{
char *start, *cp, *ep;
const char *tempchars = TEMPCHARS;
unsigned int r, tries;
int fd;
for (ep = path; *ep; ep++)
;
if (path + slen >= ep) {
errno = EINVAL;
return(-1);
}
ep -= slen;
tries = 1;
for (start = ep; start > path && start[-1] == 'X'; start--) {
if (tries < INT_MAX / NUM_CHARS)
tries *= NUM_CHARS;
}
tries *= 2;
do {
for (cp = start; *cp; cp++) {
r = get_random() % NUM_CHARS;
*cp = tempchars[r];
}
fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
if (fd != -1 || errno != EEXIST)
return(fd);
} while (--tries);
errno = EEXIST;
return(-1);
}
#ifdef HAVE_RANDOM
# define RAND random
# define SRAND srandom
# define SEED_T unsigned int
#else
# ifdef HAVE_LRAND48
# define RAND lrand48
# define SRAND srand48
# define SEED_T long
# else
# define RAND rand
# define SRAND srand
# define SEED_T unsigned int
# endif
#endif
static void
seed_random()
{
SEED_T seed;
struct timeval tv;
/*
* Seed from time of day and process id multiplied by small primes.
*/
(void) gettime(&tv);
seed = (tv.tv_sec % 10000) * 523 + tv.tv_usec * 13 +
(getpid() % 1000) * 983;
SRAND(seed);
}
static unsigned int
get_random()
{
static int initialized;
if (!initialized) {
seed_random();
initialized = 1;
}
return(RAND() & 0xffffffff);
}
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