OpenBSD-4.6/games/fortune/fortune/fortune.c
/* $OpenBSD: fortune.c,v 1.27 2008/04/13 00:22:16 djm Exp $ */
/* $NetBSD: fortune.c,v 1.8 1995/03/23 08:28:40 cgd Exp $ */
/*-
* Copyright (c) 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ken Arnold.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1986, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)fortune.c 8.1 (Berkeley) 5/31/93";
#else
static char rcsid[] = "$OpenBSD: fortune.c,v 1.27 2008/04/13 00:22:16 djm Exp $";
#endif
#endif /* not lint */
# include <sys/param.h>
# include <sys/stat.h>
# include <dirent.h>
# include <fcntl.h>
# include <assert.h>
# include <unistd.h>
# include <stdio.h>
# include <ctype.h>
# include <stdlib.h>
# include <string.h>
# include <limits.h>
# include "strfile.h"
# include "pathnames.h"
# define TRUE 1
# define FALSE 0
# define bool short
# define MINW 6 /* minimum wait if desired */
# define CPERS 20 /* # of chars for each sec */
# define SLEN 160 /* # of chars in short fortune */
# define POS_UNKNOWN ((int32_t) -1) /* pos for file unknown */
# define NO_PROB (-1) /* no prob specified for file */
# ifdef DEBUG
# define DPRINTF(l,x) if (Debug >= l) fprintf x; else
# undef NDEBUG
# else
# define DPRINTF(l,x)
# define NDEBUG 1
# endif
typedef struct fd {
int percent;
int fd, datfd;
int32_t pos;
FILE *inf;
char *name;
char *path;
char *datfile, *posfile;
bool read_tbl;
bool was_pos_file;
STRFILE tbl;
int num_children;
struct fd *child, *parent;
struct fd *next, *prev;
} FILEDESC;
bool Found_one; /* did we find a match? */
bool Find_files = FALSE; /* just find a list of proper fortune files */
bool Wait = FALSE; /* wait desired after fortune */
bool Short_only = FALSE; /* short fortune desired */
bool Long_only = FALSE; /* long fortune desired */
bool Offend = FALSE; /* offensive fortunes only */
bool All_forts = FALSE; /* any fortune allowed */
bool Equal_probs = FALSE; /* scatter un-allocted prob equally */
#ifndef NO_REGEX
bool Match = FALSE; /* dump fortunes matching a pattern */
#endif
#ifdef DEBUG
bool Debug = FALSE; /* print debug messages */
#endif
char *Fortbuf = NULL; /* fortune buffer for -m */
int Fort_len = 0;
int32_t Seekpts[2]; /* seek pointers to fortunes */
FILEDESC *File_list = NULL, /* Head of file list */
*File_tail = NULL; /* Tail of file list */
FILEDESC *Fortfile; /* Fortune file to use */
STRFILE Noprob_tbl; /* sum of data for all no prob files */
int add_dir(FILEDESC *);
int add_file(int,
char *, char *, FILEDESC **, FILEDESC **, FILEDESC *);
void all_forts(FILEDESC *, char *);
char *copy(char *, char *);
void display(FILEDESC *);
void do_free(void *);
void *do_malloc(u_int);
int form_file_list(char **, int);
int fortlen(void);
void get_fort(void);
void get_pos(FILEDESC *);
void get_tbl(FILEDESC *);
void getargs(int, char *[]);
void init_prob(void);
int is_dir(char *);
int is_fortfile(char *, char **, char **, int);
int is_off_name(char *);
int max(int, int);
FILEDESC *
new_fp(void);
char *off_name(char *);
void open_dat(FILEDESC *);
void open_fp(FILEDESC *);
FILEDESC *
pick_child(FILEDESC *);
void print_file_list(void);
void print_list(FILEDESC *, int);
void sum_noprobs(FILEDESC *);
void sum_tbl(STRFILE *, STRFILE *);
void usage(void);
void zero_tbl(STRFILE *);
#ifndef NO_REGEX
char *conv_pat(char *);
int find_matches(void);
void matches_in_list(FILEDESC *);
int maxlen_in_list(FILEDESC *);
int minlen_in_list(FILEDESC *);
#endif
#ifndef NO_REGEX
#ifdef REGCMP
# define RE_COMP(p) (Re_pat = regcmp(p, NULL))
# define BAD_COMP(f) ((f) == NULL)
# define RE_EXEC(p) regex(Re_pat, (p))
char *Re_pat;
char *regcmp(), *regex();
#else
# define RE_COMP(p) (p = re_comp(p))
# define BAD_COMP(f) ((f) != NULL)
# define RE_EXEC(p) re_exec(p)
#endif
#endif
int
main(int ac, char *av[])
{
#ifdef OK_TO_WRITE_DISK
int fd;
#endif /* OK_TO_WRITE_DISK */
getargs(ac, av);
#ifndef NO_REGEX
if (Match)
exit(find_matches() != 0);
#endif
init_prob();
if (Short_only && minlen_in_list(File_list) > SLEN ||
Long_only && maxlen_in_list(File_list) <= SLEN)
exit(0);
do {
get_fort();
} while ((Short_only && fortlen() > SLEN) ||
(Long_only && fortlen() <= SLEN));
display(Fortfile);
#ifdef OK_TO_WRITE_DISK
if ((fd = creat(Fortfile->posfile, 0666)) < 0) {
perror(Fortfile->posfile);
exit(1);
}
#ifdef LOCK_EX
/*
* if we can, we exclusive lock, but since it isn't very
* important, we just punt if we don't have easy locking
* available.
*/
(void) flock(fd, LOCK_EX);
#endif /* LOCK_EX */
Fortfile->pos = htonl(Fortfile->pos);
write(fd, (char *) &Fortfile->pos, sizeof Fortfile->pos);
Fortfile->pos = ntohl(Fortfile->pos);
if (!Fortfile->was_pos_file)
(void) chmod(Fortfile->path, 0666);
#ifdef LOCK_EX
(void) flock(fd, LOCK_UN);
#endif /* LOCK_EX */
#endif /* OK_TO_WRITE_DISK */
if (Wait) {
if (Fort_len == 0)
(void) fortlen();
sleep((unsigned int) max(Fort_len / CPERS, MINW));
}
exit(0);
/* NOTREACHED */
}
void
display(FILEDESC *fp)
{
char *p, ch;
char line[BUFSIZ];
open_fp(fp);
(void) fseek(fp->inf, (long)Seekpts[0], SEEK_SET);
for (Fort_len = 0; fgets(line, sizeof line, fp->inf) != NULL &&
!STR_ENDSTRING(line, fp->tbl); Fort_len++) {
if (fp->tbl.str_flags & STR_ROTATED)
for (p = line; ch = *p; ++p)
if (isupper(ch))
*p = 'A' + (ch - 'A' + 13) % 26;
else if (islower(ch))
*p = 'a' + (ch - 'a' + 13) % 26;
fputs(line, stdout);
}
(void) fflush(stdout);
}
/*
* fortlen:
* Return the length of the fortune.
*/
int
fortlen(void)
{
int nchar;
char line[BUFSIZ];
if (!(Fortfile->tbl.str_flags & (STR_RANDOM | STR_ORDERED)))
nchar = (Seekpts[1] - Seekpts[0] <= SLEN);
else {
open_fp(Fortfile);
(void) fseek(Fortfile->inf, (long)Seekpts[0], SEEK_SET);
nchar = 0;
while (fgets(line, sizeof line, Fortfile->inf) != NULL &&
!STR_ENDSTRING(line, Fortfile->tbl))
nchar += strlen(line);
}
Fort_len = nchar;
return nchar;
}
/*
* This routine evaluates the arguments on the command line
*/
void
getargs(int argc, char *argv[])
{
int ignore_case;
# ifndef NO_REGEX
char *pat = NULL;
# endif /* NO_REGEX */
extern char *optarg;
extern int optind;
int ch;
ignore_case = FALSE;
# ifdef DEBUG
while ((ch = getopt(argc, argv, "aDefilm:osw")) != -1)
#else
while ((ch = getopt(argc, argv, "aefilm:osw")) != -1)
#endif /* DEBUG */
switch(ch) {
case 'a': /* any fortune */
All_forts++;
break;
# ifdef DEBUG
case 'D':
Debug++;
break;
# endif /* DEBUG */
case 'e':
Equal_probs++; /* scatter un-allocted prob equally */
break;
case 'f': /* find fortune files */
Find_files++;
break;
case 'l': /* long ones only */
Long_only++;
Short_only = FALSE;
break;
case 'o': /* offensive ones only */
Offend++;
break;
case 's': /* short ones only */
Short_only++;
Long_only = FALSE;
break;
case 'w': /* give time to read */
Wait++;
break;
# ifdef NO_REGEX
case 'i': /* case-insensitive match */
case 'm': /* dump out the fortunes */
(void) fprintf(stderr,
"fortune: can't match fortunes on this system (Sorry)\n");
exit(0);
# else /* NO_REGEX */
case 'm': /* dump out the fortunes */
Match++;
pat = optarg;
break;
case 'i': /* case-insensitive match */
ignore_case++;
break;
# endif /* NO_REGEX */
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (!form_file_list(argv, argc))
exit(1); /* errors printed through form_file_list() */
#ifdef DEBUG
if (Debug >= 1)
print_file_list();
#endif /* DEBUG */
if (Find_files) {
print_file_list();
exit(0);
}
# ifndef NO_REGEX
if (pat != NULL) {
if (ignore_case)
pat = conv_pat(pat);
if (BAD_COMP(RE_COMP(pat))) {
#ifndef REGCMP
fprintf(stderr, "%s\n", pat);
#else /* REGCMP */
fprintf(stderr, "bad pattern: %s\n", pat);
#endif /* REGCMP */
}
}
# endif /* NO_REGEX */
}
/*
* form_file_list:
* Form the file list from the file specifications.
*/
int
form_file_list(char **files, int file_cnt)
{
int i, percent;
char *sp;
if (file_cnt == 0)
if (Find_files)
return add_file(NO_PROB, FORTDIR, NULL, &File_list,
&File_tail, NULL);
else
return add_file(NO_PROB, "fortunes", FORTDIR,
&File_list, &File_tail, NULL);
for (i = 0; i < file_cnt; i++) {
percent = NO_PROB;
if (!isdigit(files[i][0]))
sp = files[i];
else {
percent = 0;
for (sp = files[i]; isdigit(*sp); sp++)
percent = percent * 10 + *sp - '0';
if (percent > 100) {
fprintf(stderr, "percentages must be <= 100\n");
return FALSE;
}
if (*sp == '.') {
fprintf(stderr, "percentages must be integers\n");
return FALSE;
}
/*
* If the number isn't followed by a '%', then
* it was not a percentage, just the first part
* of a file name which starts with digits.
*/
if (*sp != '%') {
percent = NO_PROB;
sp = files[i];
}
else if (*++sp == '\0') {
if (++i >= file_cnt) {
fprintf(stderr, "percentages must precede files\n");
return FALSE;
}
sp = files[i];
}
}
if (strcmp(sp, "all") == 0)
sp = FORTDIR;
if (!add_file(percent, sp, NULL, &File_list, &File_tail, NULL))
return FALSE;
}
return TRUE;
}
/*
* add_file:
* Add a file to the file list.
*/
int
add_file(int percent, char *file, char *dir, FILEDESC **head, FILEDESC **tail,
FILEDESC *parent)
{
FILEDESC *fp;
int fd;
char *path, *offensive;
bool was_malloc;
bool isdir;
if (dir == NULL) {
path = file;
was_malloc = FALSE;
} else {
size_t len;
len = (unsigned int) (strlen(dir) + strlen(file) + 2);
path = do_malloc(len);
snprintf(path, len, "%s/%s", dir, file);
was_malloc = TRUE;
}
if ((isdir = is_dir(path)) && parent != NULL) {
if (was_malloc)
free(path);
return FALSE; /* don't recurse */
}
offensive = NULL;
if (!isdir && parent == NULL && (All_forts || Offend) &&
!is_off_name(path)) {
offensive = off_name(path);
if (Offend) {
if (was_malloc)
free(path);
path = offensive;
file = off_name(file);
was_malloc = TRUE;
}
}
DPRINTF(1, (stderr, "adding file \"%s\"\n", path));
over:
if ((fd = open(path, 0)) < 0) {
/*
* This is a sneak. If the user said -a, and if the
* file we're given isn't a file, we check to see if
* there is a -o version. If there is, we treat it as
* if *that* were the file given. We only do this for
* individual files -- if we're scanning a directory,
* we'll pick up the -o file anyway.
*/
if (All_forts && offensive != NULL) {
path = offensive;
if (was_malloc)
free(path);
offensive = NULL;
was_malloc = TRUE;
DPRINTF(1, (stderr, "\ttrying \"%s\"\n", path));
file = off_name(file);
goto over;
}
if (dir == NULL && file[0] != '/')
return add_file(percent, file, FORTDIR, head, tail,
parent);
if (parent == NULL)
perror(path);
if (was_malloc)
free(path);
return FALSE;
}
DPRINTF(2, (stderr, "path = \"%s\"\n", path));
fp = new_fp();
fp->fd = fd;
fp->percent = percent;
fp->name = file;
fp->path = path;
fp->parent = parent;
if ((isdir && !add_dir(fp)) ||
(!isdir &&
!is_fortfile(path, &fp->datfile, &fp->posfile, (parent != NULL))))
{
if (parent == NULL)
fprintf(stderr,
"fortune: %s not a fortune file or directory\n",
path);
if (was_malloc)
free(path);
do_free(fp->datfile);
do_free(fp->posfile);
free((char *) fp);
do_free(offensive);
return FALSE;
}
/*
* If the user said -a, we need to make this node a pointer to
* both files, if there are two. We don't need to do this if
* we are scanning a directory, since the scan will pick up the
* -o file anyway.
*/
if (All_forts && parent == NULL && !is_off_name(path))
all_forts(fp, offensive);
if (*head == NULL)
*head = *tail = fp;
else if (fp->percent == NO_PROB) {
(*tail)->next = fp;
fp->prev = *tail;
*tail = fp;
}
else {
(*head)->prev = fp;
fp->next = *head;
*head = fp;
}
#ifdef OK_TO_WRITE_DISK
fp->was_pos_file = (access(fp->posfile, W_OK) >= 0);
#endif /* OK_TO_WRITE_DISK */
return TRUE;
}
/*
* new_fp:
* Return a pointer to an initialized new FILEDESC.
*/
FILEDESC *
new_fp(void)
{
FILEDESC *fp;
fp = (FILEDESC *) do_malloc(sizeof *fp);
fp->datfd = -1;
fp->pos = POS_UNKNOWN;
fp->inf = NULL;
fp->fd = -1;
fp->percent = NO_PROB;
fp->read_tbl = FALSE;
fp->next = NULL;
fp->prev = NULL;
fp->child = NULL;
fp->parent = NULL;
fp->datfile = NULL;
fp->posfile = NULL;
return fp;
}
/*
* off_name:
* Return a pointer to the offensive version of a file of this name.
*/
char *
off_name(char *file)
{
return (copy(file, "-o"));
}
/*
* is_off_name:
* Is the file an offensive-style name?
*/
int
is_off_name(char *file)
{
int len;
len = strlen(file);
return (len >= 3 && file[len - 2] == '-' && file[len - 1] == 'o');
}
/*
* all_forts:
* Modify a FILEDESC element to be the parent of two children if
* there are two children to be a parent of.
*/
void
all_forts(FILEDESC *fp, char *offensive)
{
char *sp;
FILEDESC *scene, *obscene;
int fd;
char *datfile, *posfile;
if (fp->child != NULL) /* this is a directory, not a file */
return;
if (!is_fortfile(offensive, &datfile, &posfile, FALSE))
return;
if ((fd = open(offensive, 0)) < 0)
return;
DPRINTF(1, (stderr, "adding \"%s\" because of -a\n", offensive));
scene = new_fp();
obscene = new_fp();
*scene = *fp;
fp->num_children = 2;
fp->child = scene;
scene->next = obscene;
obscene->next = NULL;
scene->child = obscene->child = NULL;
scene->parent = obscene->parent = fp;
fp->fd = -1;
scene->percent = obscene->percent = NO_PROB;
obscene->fd = fd;
obscene->inf = NULL;
obscene->path = offensive;
if ((sp = strrchr(offensive, '/')) == NULL)
obscene->name = offensive;
else
obscene->name = ++sp;
obscene->datfile = datfile;
obscene->posfile = posfile;
obscene->read_tbl = FALSE;
#ifdef OK_TO_WRITE_DISK
obscene->was_pos_file = (access(obscene->posfile, W_OK) >= 0);
#endif /* OK_TO_WRITE_DISK */
}
/*
* add_dir:
* Add the contents of an entire directory.
*/
int
add_dir(FILEDESC *fp)
{
DIR *dir;
struct dirent *dirent;
FILEDESC *tailp;
char *name;
(void) close(fp->fd);
fp->fd = -1;
if ((dir = opendir(fp->path)) == NULL) {
perror(fp->path);
return FALSE;
}
tailp = NULL;
DPRINTF(1, (stderr, "adding dir \"%s\"\n", fp->path));
fp->num_children = 0;
while ((dirent = readdir(dir)) != NULL) {
if (dirent->d_namlen == 0)
continue;
name = copy(dirent->d_name, NULL);
if (add_file(NO_PROB, name, fp->path, &fp->child, &tailp, fp))
fp->num_children++;
else
free(name);
}
if (fp->num_children == 0) {
(void) fprintf(stderr,
"fortune: %s: No fortune files in directory.\n", fp->path);
return FALSE;
}
return TRUE;
}
/*
* is_dir:
* Return TRUE if the file is a directory, FALSE otherwise.
*/
int
is_dir(char *file)
{
struct stat sbuf;
if (stat(file, &sbuf) < 0)
return FALSE;
return S_ISDIR(sbuf.st_mode);
}
/*
* is_fortfile:
* Return TRUE if the file is a fortune database file. We try and
* exclude files without reading them if possible to avoid
* overhead. Files which start with ".", or which have "illegal"
* suffixes, as contained in suflist[], are ruled out.
*/
/* ARGSUSED */
int
is_fortfile(char *file, char **datp, char **posp, int check_for_offend)
{
int i;
char *sp;
char *datfile;
static char *suflist[] = { /* list of "illegal" suffixes" */
"dat", "pos", "c", "h", "p", "i", "f",
"pas", "ftn", "ins.c", "ins,pas",
"ins.ftn", "sml",
NULL
};
DPRINTF(2, (stderr, "is_fortfile(%s) returns ", file));
/*
* Preclude any -o files for offendable people, and any non -o
* files for completely offensive people.
*/
if (check_for_offend && !All_forts) {
i = strlen(file);
if (Offend ^ (file[i - 2] == '-' && file[i - 1] == 'o'))
return FALSE;
}
if ((sp = strrchr(file, '/')) == NULL)
sp = file;
else
sp++;
if (*sp == '.') {
DPRINTF(2, (stderr, "FALSE (file starts with '.')\n"));
return FALSE;
}
if ((sp = strrchr(sp, '.')) != NULL) {
sp++;
for (i = 0; suflist[i] != NULL; i++)
if (strcmp(sp, suflist[i]) == 0) {
DPRINTF(2, (stderr, "FALSE (file has suffix \".%s\")\n", sp));
return FALSE;
}
}
datfile = copy(file, ".dat");
if (access(datfile, R_OK) < 0) {
free(datfile);
DPRINTF(2, (stderr, "FALSE (no \".dat\" file)\n"));
return FALSE;
}
if (datp != NULL)
*datp = datfile;
else
free(datfile);
#ifdef OK_TO_WRITE_DISK
if (posp != NULL)
*posp = copy(file, ".pos");
#endif /* OK_TO_WRITE_DISK */
DPRINTF(2, (stderr, "TRUE\n"));
return TRUE;
}
/*
* copy:
* Return a malloc()'ed copy of the string + an optional suffix
*/
char *
copy(char *str, char *suf)
{
char *new;
if (asprintf(&new, "%s%s", str, suf ? suf : "") == -1)
return NULL;
return new;
}
/*
* do_malloc:
* Do a malloc, checking for NULL return.
*/
void *
do_malloc(unsigned int size)
{
void *new;
if ((new = malloc(size)) == NULL) {
(void) fprintf(stderr, "fortune: out of memory.\n");
exit(1);
}
return new;
}
/*
* do_free:
* Free malloc'ed space, if any.
*/
void
do_free(void *ptr)
{
if (ptr != NULL)
free(ptr);
}
/*
* init_prob:
* Initialize the fortune probabilities.
*/
void
init_prob(void)
{
FILEDESC *fp, *last;
int percent, num_noprob, frac;
/*
* Distribute the residual probability (if any) across all
* files with unspecified probability (i.e., probability of 0)
* (if any).
*/
percent = 0;
num_noprob = 0;
for (fp = File_tail; fp != NULL; fp = fp->prev)
if (fp->percent == NO_PROB) {
num_noprob++;
if (Equal_probs)
last = fp;
}
else
percent += fp->percent;
DPRINTF(1, (stderr, "summing probabilities:%d%% with %d NO_PROB's",
percent, num_noprob));
if (percent > 100) {
(void) fprintf(stderr,
"fortune: probabilities sum to %d%%!\n", percent);
exit(1);
}
else if (percent < 100 && num_noprob == 0) {
(void) fprintf(stderr,
"fortune: no place to put residual probability (%d%%)\n",
percent);
exit(1);
}
else if (percent == 100 && num_noprob != 0) {
(void) fprintf(stderr,
"fortune: no probability left to put in residual files\n");
exit(1);
}
percent = 100 - percent;
if (Equal_probs)
if (num_noprob != 0) {
if (num_noprob > 1) {
frac = percent / num_noprob;
DPRINTF(1, (stderr, ", frac = %d%%", frac));
for (fp = File_list; fp != last; fp = fp->next)
if (fp->percent == NO_PROB) {
fp->percent = frac;
percent -= frac;
}
}
last->percent = percent;
DPRINTF(1, (stderr, ", residual = %d%%", percent));
}
else {
DPRINTF(1, (stderr,
", %d%% distributed over remaining fortunes\n",
percent));
}
DPRINTF(1, (stderr, "\n"));
#ifdef DEBUG
if (Debug >= 1)
print_file_list();
#endif
}
/*
* get_fort:
* Get the fortune data file's seek pointer for the next fortune.
*/
void
get_fort(void)
{
FILEDESC *fp;
int choice;
if (File_list->next == NULL || File_list->percent == NO_PROB)
fp = File_list;
else {
choice = arc4random_uniform(100);
DPRINTF(1, (stderr, "choice = %d\n", choice));
for (fp = File_list; fp->percent != NO_PROB; fp = fp->next)
if (choice < fp->percent)
break;
else {
choice -= fp->percent;
DPRINTF(1, (stderr,
" skip \"%s\", %d%% (choice = %d)\n",
fp->name, fp->percent, choice));
}
DPRINTF(1, (stderr,
"using \"%s\", %d%% (choice = %d)\n",
fp->name, fp->percent, choice));
}
if (fp->percent != NO_PROB)
get_tbl(fp);
else {
if (fp->next != NULL) {
sum_noprobs(fp);
choice = arc4random_uniform(Noprob_tbl.str_numstr);
DPRINTF(1, (stderr, "choice = %d (of %d) \n", choice,
Noprob_tbl.str_numstr));
while (choice >= fp->tbl.str_numstr) {
choice -= fp->tbl.str_numstr;
fp = fp->next;
DPRINTF(1, (stderr,
" skip \"%s\", %d (choice = %d)\n",
fp->name, fp->tbl.str_numstr,
choice));
}
DPRINTF(1, (stderr, "using \"%s\", %d\n", fp->name,
fp->tbl.str_numstr));
}
get_tbl(fp);
}
if (fp->child != NULL) {
DPRINTF(1, (stderr, "picking child\n"));
fp = pick_child(fp);
}
Fortfile = fp;
get_pos(fp);
open_dat(fp);
(void) lseek(fp->datfd,
(off_t) (sizeof fp->tbl + fp->pos * sizeof Seekpts[0]), 0);
read(fp->datfd, &Seekpts[0], sizeof Seekpts[0]);
Seekpts[0] = ntohl(Seekpts[0]);
read(fp->datfd, &Seekpts[1], sizeof Seekpts[1]);
Seekpts[1] = ntohl(Seekpts[1]);
}
/*
* pick_child
* Pick a child from a chosen parent.
*/
FILEDESC *
pick_child(FILEDESC *parent)
{
FILEDESC *fp;
int choice;
if (Equal_probs) {
choice = arc4random_uniform(parent->num_children);
DPRINTF(1, (stderr, " choice = %d (of %d)\n",
choice, parent->num_children));
for (fp = parent->child; choice--; fp = fp->next)
continue;
DPRINTF(1, (stderr, " using %s\n", fp->name));
return fp;
}
else {
get_tbl(parent);
choice = arc4random_uniform(parent->tbl.str_numstr);
DPRINTF(1, (stderr, " choice = %d (of %d)\n",
choice, parent->tbl.str_numstr));
for (fp = parent->child; choice >= fp->tbl.str_numstr;
fp = fp->next) {
choice -= fp->tbl.str_numstr;
DPRINTF(1, (stderr, "\tskip %s, %d (choice = %d)\n",
fp->name, fp->tbl.str_numstr, choice));
}
DPRINTF(1, (stderr, " using %s, %d\n", fp->name,
fp->tbl.str_numstr));
return fp;
}
}
/*
* sum_noprobs:
* Sum up all the noprob probabilities, starting with fp.
*/
void
sum_noprobs(FILEDESC *fp)
{
static bool did_noprobs = FALSE;
if (did_noprobs)
return;
zero_tbl(&Noprob_tbl);
while (fp != NULL) {
get_tbl(fp);
sum_tbl(&Noprob_tbl, &fp->tbl);
fp = fp->next;
}
did_noprobs = TRUE;
}
int
max(int i, int j)
{
return (i >= j ? i : j);
}
/*
* open_fp:
* Assocatiate a FILE * with the given FILEDESC.
*/
void
open_fp(FILEDESC *fp)
{
if (fp->inf == NULL && (fp->inf = fdopen(fp->fd, "r")) == NULL) {
perror(fp->path);
exit(1);
}
}
/*
* open_dat:
* Open up the dat file if we need to.
*/
void
open_dat(FILEDESC *fp)
{
if (fp->datfd < 0 && (fp->datfd = open(fp->datfile, 0)) < 0) {
perror(fp->datfile);
exit(1);
}
}
/*
* get_pos:
* Get the position from the pos file, if there is one. If not,
* return a random number.
*/
void
get_pos(FILEDESC *fp)
{
#ifdef OK_TO_WRITE_DISK
int fd;
#endif /* OK_TO_WRITE_DISK */
assert(fp->read_tbl);
if (fp->pos == POS_UNKNOWN) {
#ifdef OK_TO_WRITE_DISK
if ((fd = open(fp->posfile, 0)) < 0 ||
read(fd, &fp->pos, sizeof fp->pos) != sizeof fp->pos)
fp->pos = arc4random_uniform(fp->tbl.str_numstr);
else if (ntohl(fp->pos) >= fp->tbl.str_numstr)
fp->pos %= fp->tbl.str_numstr;
else
fp->pos = ntohl(fp->pos);
if (fd >= 0)
(void) close(fd);
#else
fp->pos = arc4random_uniform(fp->tbl.str_numstr);
#endif /* OK_TO_WRITE_DISK */
}
if (++(fp->pos) >= fp->tbl.str_numstr)
fp->pos -= fp->tbl.str_numstr;
DPRINTF(1, (stderr, "pos for %s is %d\n", fp->name, fp->pos));
}
/*
* get_tbl:
* Get the tbl data file the datfile.
*/
void
get_tbl(FILEDESC *fp)
{
int fd;
FILEDESC *child;
if (fp->read_tbl)
return;
if (fp->child == NULL) {
if ((fd = open(fp->datfile, 0)) < 0) {
perror(fp->datfile);
exit(1);
}
if (read(fd, &fp->tbl.str_version, sizeof(fp->tbl.str_version)) !=
sizeof(fp->tbl.str_version)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
if (read(fd, &fp->tbl.str_numstr, sizeof(fp->tbl.str_numstr)) !=
sizeof(fp->tbl.str_numstr)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
if (read(fd, &fp->tbl.str_longlen, sizeof(fp->tbl.str_longlen)) !=
sizeof(fp->tbl.str_longlen)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
if (read(fd, &fp->tbl.str_shortlen, sizeof(fp->tbl.str_shortlen)) !=
sizeof(fp->tbl.str_shortlen)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
if (read(fd, &fp->tbl.str_flags, sizeof(fp->tbl.str_flags)) !=
sizeof(fp->tbl.str_flags)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
if (read(fd, fp->tbl.stuff, sizeof(fp->tbl.stuff)) !=
sizeof(fp->tbl.stuff)) {
(void)fprintf(stderr,
"fortune: %s corrupted\n", fp->path);
exit(1);
}
/* fp->tbl.str_version = ntohl(fp->tbl.str_version); */
fp->tbl.str_numstr = ntohl(fp->tbl.str_numstr);
fp->tbl.str_longlen = ntohl(fp->tbl.str_longlen);
fp->tbl.str_shortlen = ntohl(fp->tbl.str_shortlen);
fp->tbl.str_flags = ntohl(fp->tbl.str_flags);
(void) close(fd);
if (fp->tbl.str_numstr == 0) {
fprintf(stderr, "fortune: %s is empty\n", fp->path);
exit(1);
}
}
else {
zero_tbl(&fp->tbl);
for (child = fp->child; child != NULL; child = child->next) {
get_tbl(child);
sum_tbl(&fp->tbl, &child->tbl);
}
}
fp->read_tbl = TRUE;
}
/*
* zero_tbl:
* Zero out the fields we care about in a tbl structure.
*/
void
zero_tbl(STRFILE *tp)
{
tp->str_numstr = 0;
tp->str_longlen = 0;
tp->str_shortlen = -1;
}
/*
* sum_tbl:
* Merge the tbl data of t2 into t1.
*/
void
sum_tbl(STRFILE *t1, STRFILE *t2)
{
t1->str_numstr += t2->str_numstr;
if (t1->str_longlen < t2->str_longlen)
t1->str_longlen = t2->str_longlen;
if (t1->str_shortlen > t2->str_shortlen)
t1->str_shortlen = t2->str_shortlen;
}
#define STR(str) ((str) == NULL ? "NULL" : (str))
/*
* print_file_list:
* Print out the file list
*/
void
print_file_list(void)
{
print_list(File_list, 0);
}
/*
* print_list:
* Print out the actual list, recursively.
*/
void
print_list(FILEDESC *list, int lev)
{
while (list != NULL) {
fprintf(stderr, "%*s", lev * 4, "");
if (list->percent == NO_PROB)
fprintf(stderr, "___%%");
else
fprintf(stderr, "%3d%%", list->percent);
fprintf(stderr, " %s", STR(list->name));
DPRINTF(1, (stderr, " (%s, %s, %s)\n", STR(list->path),
STR(list->datfile), STR(list->posfile)));
putc('\n', stderr);
if (list->child != NULL)
print_list(list->child, lev + 1);
list = list->next;
}
}
#ifndef NO_REGEX
/*
* conv_pat:
* Convert the pattern to an ignore-case equivalent.
*/
char *
conv_pat(char *orig)
{
char *sp;
unsigned int cnt;
char *new;
cnt = 1; /* allow for '\0' */
for (sp = orig; *sp != '\0'; sp++)
if (isalpha(*sp))
cnt += 4;
else
cnt++;
if ((new = malloc(cnt)) == NULL) {
fprintf(stderr, "pattern too long for ignoring case\n");
exit(1);
}
for (sp = new; *orig != '\0'; orig++) {
if (islower(*orig)) {
*sp++ = '[';
*sp++ = *orig;
*sp++ = toupper(*orig);
*sp++ = ']';
}
else if (isupper(*orig)) {
*sp++ = '[';
*sp++ = *orig;
*sp++ = tolower(*orig);
*sp++ = ']';
}
else
*sp++ = *orig;
}
*sp = '\0';
return new;
}
/*
* find_matches:
* Find all the fortunes which match the pattern we've been given.
*/
int
find_matches(void)
{
Fort_len = maxlen_in_list(File_list);
DPRINTF(2, (stderr, "Maximum length is %d\n", Fort_len));
/* extra length, "%\n" is appended */
Fortbuf = do_malloc((unsigned int) Fort_len + 10);
Found_one = FALSE;
matches_in_list(File_list);
return Found_one;
/* NOTREACHED */
}
/*
* maxlen_in_list
* Return the maximum fortune len in the file list.
*/
int
maxlen_in_list(FILEDESC *list)
{
FILEDESC *fp;
int len, maxlen;
maxlen = 0;
for (fp = list; fp != NULL; fp = fp->next) {
if (fp->child != NULL) {
if ((len = maxlen_in_list(fp->child)) > maxlen)
maxlen = len;
}
else {
get_tbl(fp);
if (fp->tbl.str_longlen > maxlen)
maxlen = fp->tbl.str_longlen;
}
}
return maxlen;
}
/*
* minlen_in_list
* Return the minimum fortune len in the file list.
*/
int
minlen_in_list(FILEDESC *list)
{
FILEDESC *fp;
int len, minlen;
minlen = INT_MAX;
for (fp = list; fp != NULL; fp = fp->next) {
if (fp->child != NULL) {
if ((len = minlen_in_list(fp->child)) < minlen)
minlen = len;
} else {
get_tbl(fp);
if (fp->tbl.str_shortlen < minlen)
minlen = fp->tbl.str_shortlen;
}
}
return minlen;
}
/*
* matches_in_list
* Print out the matches from the files in the list.
*/
void
matches_in_list(FILEDESC *list)
{
char *sp;
FILEDESC *fp;
int in_file;
for (fp = list; fp != NULL; fp = fp->next) {
if (fp->child != NULL) {
matches_in_list(fp->child);
continue;
}
DPRINTF(1, (stderr, "searching in %s\n", fp->path));
open_fp(fp);
sp = Fortbuf;
in_file = FALSE;
while (fgets(sp, Fort_len, fp->inf) != NULL)
if (!STR_ENDSTRING(sp, fp->tbl))
sp += strlen(sp);
else {
*sp = '\0';
if (RE_EXEC(Fortbuf)) {
printf("%c%c", fp->tbl.str_delim,
fp->tbl.str_delim);
if (!in_file) {
printf(" (%s)", fp->name);
Found_one = TRUE;
in_file = TRUE;
}
putchar('\n');
(void) fwrite(Fortbuf, 1, (sp - Fortbuf), stdout);
}
sp = Fortbuf;
}
}
}
# endif /* NO_REGEX */
void
usage(void)
{
(void) fprintf(stderr, "usage: fortune [-ae");
#ifdef DEBUG
(void) fprintf(stderr, "D");
#endif /* DEBUG */
(void) fprintf(stderr, "f");
#ifndef NO_REGEX
(void) fprintf(stderr, "i");
#endif /* NO_REGEX */
(void) fprintf(stderr, "losw]");
#ifndef NO_REGEX
(void) fprintf(stderr, " [-m pattern]");
#endif /* NO_REGEX */
(void) fprintf(stderr, " [[N%%] file/directory/all]\n");
exit(1);
}