home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1986 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 are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1986 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)fortune.c 5.12 (Berkeley) 12/15/89";
- #endif /* not lint */
-
- #ifndef NeXT
- # include <machine/endian.h>
- #endif
- # include <sys/param.h>
- # include <sys/stat.h>
- # include <sys/dir.h>
- # include <stdio.h>
- # include <assert.h>
- # include "strfile.h"
- # include "pathnames.h"
-
- #ifdef SYSV
- # include <dirent.h>
-
- # define NO_LOCK
- # define REGCMP
- # ifdef NO_REGEX
- # undef NO_REGEX
- # endif /* NO_REGEX */
- # define index strchr
- # define rindex strrchr
- #endif /* SYSV */
-
- #ifndef NO_REGEX
- # include <ctype.h>
- #endif /* NO_REGEX */
-
- # ifndef NO_LOCK
- # include <sys/file.h>
- # endif /* NO_LOCK */
-
- # ifndef F_OK
- /* codes for access() */
- # define F_OK 0 /* does file exist */
- # define X_OK 1 /* is it executable by caller */
- # define W_OK 2 /* writable by caller */
- # define R_OK 4 /* readable by caller */
- # endif /* F_OK */
-
- # 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 ((unsigned long) -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 /* DEBUG */
- # define DPRINTF(l,x)
- # define NDEBUG 1
- # endif /* DEBUG */
-
- typedef struct fd {
- int percent;
- int fd, datfd;
- unsigned long 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;
-
- off_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 */
-
- char *do_malloc(), *copy(), *off_name();
-
- FILEDESC *pick_child(), *new_fp();
-
- extern char *malloc(), *index(), *rindex(), *strcpy(), *strcat();
-
- extern time_t time();
-
- #ifndef NO_REGEX
- char *conv_pat();
- #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)
-
- char *re_comp();
- #ifdef SYSV
- char *re_exec();
- #else
- int re_exec();
- #endif
- #endif
- #endif
-
- main(ac, av)
- 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();
- srandom((int)(time((time_t *) NULL) + getpid()));
- 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 */
- write(fd, (char *) &Fortfile->pos, sizeof 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 */
- }
-
- display(fp)
- FILEDESC *fp;
- {
- register char *p, ch;
- char line[BUFSIZ];
-
- open_fp(fp);
- (void) fseek(fp->inf, Seekpts[0], 0);
- 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.
- */
- fortlen()
- {
- register 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, Seekpts[0], 0);
- 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
- */
- getargs(argc, argv)
- register int argc;
- register char **argv;
- {
- register int ignore_case;
- # ifndef NO_REGEX
- register char *pat;
- # endif /* NO_REGEX */
- extern char *optarg;
- extern int optind;
- int ch;
-
- ignore_case = FALSE;
- pat = NULL;
-
- # ifdef DEBUG
- while ((ch = getopt(argc, argv, "aDefilm:osw")) != EOF)
- #else
- while ((ch = getopt(argc, argv, "aefilm:osw")) != EOF)
- #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.
- */
- form_file_list(files, file_cnt)
- register char **files;
- register int file_cnt;
- {
- register int i, percent;
- register 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.
- */
- add_file(percent, file, dir, head, tail, parent)
- int percent;
- register char *file;
- char *dir;
- FILEDESC **head, **tail;
- FILEDESC *parent;
- {
- register FILEDESC *fp;
- register int fd;
- register char *path, *offensive;
- register bool was_malloc;
- register bool isdir;
-
- if (dir == NULL) {
- path = file;
- was_malloc = FALSE;
- }
- else {
- path = do_malloc((unsigned int) (strlen(dir) + strlen(file) + 2));
- (void) strcat(strcat(strcpy(path, 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);
- was_malloc = TRUE;
- if (Offend) {
- if (was_malloc)
- free(path);
- path = offensive;
- file = off_name(file);
- }
- }
-
- 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);
- free((char *) fp);
- if (was_malloc)
- free(path);
- do_free(fp->datfile);
- do_free(fp->posfile);
- 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()
- {
- register 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(file)
- char *file;
- {
- char *new;
-
- new = copy(file, (unsigned int) (strlen(file) + 2));
- return strcat(new, "-o");
- }
-
- /*
- * is_off_name:
- * Is the file an offensive-style name?
- */
- is_off_name(file)
- 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.
- */
- all_forts(fp, offensive)
- register FILEDESC *fp;
- char *offensive;
- {
- register char *sp;
- register FILEDESC *scene, *obscene;
- register int fd;
- auto 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 = rindex(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.
- */
- add_dir(fp)
- register FILEDESC *fp;
- {
- register DIR *dir;
- #ifdef SYSV
- register struct dirent *dirent; /* NIH, of course! */
- #else
- register struct direct *dirent;
- #endif
- auto FILEDESC *tailp;
- auto 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, dirent->d_namlen);
- 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.
- */
- is_dir(file)
- char *file;
- {
- auto struct stat sbuf;
-
- if (stat(file, &sbuf) < 0)
- return FALSE;
- return (sbuf.st_mode & S_IFDIR);
- }
-
- /*
- * 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 */
- is_fortfile(file, datp, posp, check_for_offend)
- char *file;
- char **datp, **posp;
- int check_for_offend;
- {
- register int i;
- register char *sp;
- register 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 = rindex(file, '/')) == NULL)
- sp = file;
- else
- sp++;
- if (*sp == '.') {
- DPRINTF(2, (stderr, "FALSE (file starts with '.')\n"));
- return FALSE;
- }
- if ((sp = rindex(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, (unsigned int) (strlen(file) + 4)); /* +4 for ".dat" */
- strcat(datfile, ".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, (unsigned int) (strlen(file) + 4)); /* +4 for ".dat" */
- (void) strcat(*posp, ".pos");
- }
- #endif /* OK_TO_WRITE_DISK */
- DPRINTF(2, (stderr, "TRUE\n"));
- return TRUE;
- }
-
- /*
- * copy:
- * Return a malloc()'ed copy of the string
- */
- char *
- copy(str, len)
- char *str;
- unsigned int len;
- {
- char *new, *sp;
-
- new = do_malloc(len + 1);
- sp = new;
- do {
- *sp++ = *str;
- } while (*str++);
- return new;
- }
-
- /*
- * do_malloc:
- * Do a malloc, checking for NULL return.
- */
- char *
- do_malloc(size)
- unsigned int size;
- {
- char *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.
- */
- do_free(ptr)
- char *ptr;
- {
- if (ptr != NULL)
- free(ptr);
- }
-
- /*
- * init_prob:
- * Initialize the fortune probabilities.
- */
- init_prob()
- {
- register FILEDESC *fp, *last;
- register 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.
- */
- get_fort()
- {
- register FILEDESC *fp;
- register int choice;
- long random();
-
- if (File_list->next == NULL || File_list->percent == NO_PROB)
- fp = File_list;
- else {
- 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)
- 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 = random() % 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, sizeof Seekpts);
- Seekpts[0] = ntohl(Seekpts[0]);
- Seekpts[1] = ntohl(Seekpts[1]);
- }
-
- /*
- * pick_child
- * Pick a child from a chosen parent.
- */
- FILEDESC *
- pick_child(parent)
- FILEDESC *parent;
- {
- register FILEDESC *fp;
- register int choice;
-
- if (Equal_probs) {
- 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)
- continue;
- DPRINTF(1, (stderr, " using %s\n", fp->name));
- return fp;
- }
- else {
- get_tbl(parent);
- choice = random() % 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.
- */
- sum_noprobs(fp)
- register 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;
- }
-
- max(i, j)
- register int i, j;
- {
- return (i >= j ? i : j);
- }
-
- /*
- * open_fp:
- * Assocatiate a FILE * with the given FILEDESC.
- */
- open_fp(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.
- */
- open_dat(fp)
- 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.
- */
- get_pos(fp)
- 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 = 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 = random() % 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.
- */
- get_tbl(fp)
- FILEDESC *fp;
- {
- auto int fd;
- register 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, (char *) &fp->tbl, sizeof fp->tbl) != sizeof fp->tbl) {
- (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);
- }
- 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.
- */
- zero_tbl(tp)
- register STRFILE *tp;
- {
- tp->str_numstr = 0;
- tp->str_longlen = 0;
- tp->str_shortlen = -1;
- }
-
- /*
- * sum_tbl:
- * Merge the tbl data of t2 into t1.
- */
- sum_tbl(t1, t2)
- register STRFILE *t1, *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
- */
- print_file_list()
- {
- print_list(File_list, 0);
- }
-
- /*
- * print_list:
- * Print out the actual list, recursively.
- */
- print_list(list, lev)
- register 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(orig)
- register char *orig;
- {
- register char *sp;
- register unsigned int cnt;
- register 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.
- */
- find_matches()
- {
- 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.
- */
- maxlen_in_list(list)
- FILEDESC *list;
- {
- register FILEDESC *fp;
- register 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;
- }
-
- /*
- * matches_in_list
- * Print out the matches from the files in the list.
- */
- matches_in_list(list)
- FILEDESC *list;
- {
- register char *sp;
- register 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 */
-
- usage()
- {
- (void) fprintf(stderr, "fortune [-a");
- #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, "[ [#%%] file/directory/all]\n");
- exit(1);
- }
-