93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* newseed.c: The opienewseed() library function.
|
|
|
|
%%% copyright-cmetz-96
|
|
This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
|
|
The Inner Net License Version 3 applies to this software.
|
|
You should have received a copy of the license with this software. If
|
|
you didn't get a copy, you may request one from <license@inner.net>.
|
|
|
|
History:
|
|
|
|
Modified by cmetz for OPIE 2.4. Greatly simplified increment. Now does
|
|
not add digits. Reformatted the code.
|
|
Modified by cmetz for OPIE 2.32. Added syslog.h if DEBUG.
|
|
Modified by cmetz for OPIE 2.31. Added time.h.
|
|
Created by cmetz for OPIE 2.22.
|
|
|
|
$FreeBSD$
|
|
*/
|
|
|
|
#include "opie_cfg.h"
|
|
#if HAVE_TIME_H
|
|
#include <time.h>
|
|
#endif /* HAVE_TIME_H */
|
|
#if HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#include <ctype.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif /* HAVE_UNISTD_H */
|
|
#if HAVE_SYS_UTSNAME_H
|
|
#include <sys/utsname.h>
|
|
#endif /* HAVE_SYS_UTSNAME_H */
|
|
#include <errno.h>
|
|
#if DEBUG
|
|
#include <syslog.h>
|
|
#endif /* DEBUG */
|
|
#include "opie.h"
|
|
|
|
int opienewseed FUNCTION((seed), char *seed)
|
|
{
|
|
if (!seed)
|
|
return -1;
|
|
|
|
if (seed[0]) {
|
|
char *c, *end;
|
|
unsigned int i, max;
|
|
|
|
if ((i = strlen(seed)) > OPIE_SEED_MAX)
|
|
i = OPIE_SEED_MAX;
|
|
|
|
for (c = end = seed + i - 1, max = 1;
|
|
(c > seed) && isdigit(*c); c--)
|
|
max *= 10;
|
|
|
|
if ((i = strtoul(++c, (char **)0, 10)) < max) {
|
|
if (++i >= max)
|
|
i = 1;
|
|
|
|
snprintf(c, end - c, "%d", i);
|
|
seed[OPIE_SEED_MAX] = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
{
|
|
time_t now;
|
|
|
|
time(&now);
|
|
srand(now);
|
|
}
|
|
|
|
{
|
|
struct utsname utsname;
|
|
|
|
if (uname(&utsname) < 0) {
|
|
#if DEBUG
|
|
syslog(LOG_DEBUG, "uname: %s(%d)", strerror(errno),
|
|
errno);
|
|
#endif /* DEBUG */
|
|
utsname.nodename[0] = 'k';
|
|
utsname.nodename[1] = 'e';
|
|
}
|
|
utsname.nodename[2] = 0;
|
|
|
|
if (snprintf(seed, OPIE_SEED_MAX+1, "%s%04d", utsname.nodename,
|
|
(rand() % 9999) + 1) >= OPIE_SEED_MAX+1)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
}
|
|
|