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Use srandomdev() to initialize generator

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This commit is contained in:
Andrey A. Chernov 1997-03-24 14:39:24 +00:00
parent d9c406718c
commit f31679a94b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=24212
1 changed files with 8 additions and 38 deletions
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46
games/fortune/fortune/fortune.c
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@ -135,7 +135,6 @@ int form_file_list __P((char **, int));
int fortlen __P((void));
void get_fort __P((void));
void get_pos __P((FILEDESC *));
long get_random __P((void));
void get_tbl __P((FILEDESC *));
void getargs __P((int, char *[]));
void init_prob __P((void));
@ -200,7 +199,8 @@ char *av[];
#endif
init_prob();
srandom((unsigned long)(time((time_t *) NULL) ^ getpid()));
if (srandomdev() < 0)
srandom((unsigned long)(time((time_t *) NULL) ^ getpid()));
do {
get_fort();
} while ((Short_only && fortlen() > SLEN) ||
@ -953,7 +953,7 @@ get_fort()
if (File_list->next == NULL || File_list->percent == NO_PROB)
fp = File_list;
else {
choice = get_random() % 100;
choice = random() % 100;
DPRINTF(1, (stderr, "choice = %d\n", choice));
for (fp = File_list; fp->percent != NO_PROB; fp = fp->next)
if (choice < fp->percent)
@ -973,7 +973,7 @@ get_fort()
else {
if (fp->next != NULL) {
sum_noprobs(fp);
choice = get_random() % Noprob_tbl.str_numstr;
choice = random() % Noprob_tbl.str_numstr;
DPRINTF(1, (stderr, "choice = %d (of %ld) \n", choice,
Noprob_tbl.str_numstr));
while (choice >= fp->tbl.str_numstr) {
@ -1015,7 +1015,7 @@ FILEDESC *parent;
register int choice;
if (Equal_probs) {
choice = get_random() % parent->num_children;
choice = random() % parent->num_children;
DPRINTF(1, (stderr, " choice = %d (of %d)\n",
choice, parent->num_children));
for (fp = parent->child; choice--; fp = fp->next)
@ -1025,7 +1025,7 @@ FILEDESC *parent;
}
else {
get_tbl(parent);
choice = get_random() % parent->tbl.str_numstr;
choice = random() % parent->tbl.str_numstr;
DPRINTF(1, (stderr, " choice = %d (of %ld)\n",
choice, parent->tbl.str_numstr));
for (fp = parent->child; choice >= fp->tbl.str_numstr;
@ -1114,13 +1114,13 @@ FILEDESC *fp;
#ifdef OK_TO_WRITE_DISK
if ((fd = open(fp->posfile, 0)) < 0 ||
read(fd, &fp->pos, sizeof fp->pos) != sizeof fp->pos)
fp->pos = get_random() % fp->tbl.str_numstr;
fp->pos = random() % fp->tbl.str_numstr;
else if (fp->pos >= fp->tbl.str_numstr)
fp->pos %= fp->tbl.str_numstr;
if (fd >= 0)
(void) close(fd);
#else
fp->pos = get_random() % fp->tbl.str_numstr;
fp->pos = random() % fp->tbl.str_numstr;
#endif /* OK_TO_WRITE_DISK */
}
if (++(fp->pos) >= fp->tbl.str_numstr)
@ -1128,36 +1128,6 @@ FILEDESC *fp;
DPRINTF(1, (stderr, "pos for %s is %ld\n", fp->name, fp->pos));
}
/*
* get_random:
* Get a random number, either via /dev/urandom, or random()
* if /dev/urandom is not available.
*/
long
get_random()
{
static int how = 0;
static int fd;
long rnd;
if (how == 0) {
if ((fd = open("/dev/urandom", O_RDONLY)) >= 0)
how = 1;
else
how = 2;
}
if (how == 1) {
if (read(fd, (void *) &rnd, sizeof(rnd)) < 0) {
how = 2;
}
else {
rnd = abs(rnd);
return (rnd);
}
}
return (random());
}
/*
* get_tbl:
* Get the tbl data file the datfile.