Mercurial > hg > early-roguelike
view rogue5/save.c @ 227:696277507a2e
Rogue V4, V5: disable a cheat granting permanent monster detection.
In these two games, a potion of monster detection turns on the player's
SEEMONST flag. A fuse is set to call turn_see() to turn the flag back
off. But the save and restore functions do not recognize turn_see() and
fail to set the fuse up again.
When restoring, Rogue V4 merely sets the fuse's function to NULL and
leaves it burning. When it goes off, a segfault results. Rogue V5
clears all the fuse's fields, and the player retains the ability to see
all monsters on the level.
The save and restore code can now handle the fuse. The function used is
a new wrapper, turn_see_off(), which should lead to less problems with
daemons being multiple incompatible types.
Also, Rogue V4 and Super-Rogue now properly clear unrecognized daemon
and fuse slots when restoring a saved game.
author | John "Elwin" Edwards |
---|---|
date | Sat, 05 Mar 2016 12:10:20 -0500 |
parents | af6b05e86747 |
children | 3d4252fa2ed3 |
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/* * save and restore routines * * @(#)save.c 4.33 (Berkeley) 06/01/83 * * Rogue: Exploring the Dungeons of Doom * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman * All rights reserved. * * See the file LICENSE.TXT for full copyright and licensing information. */ #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <errno.h> #include <signal.h> #include <string.h> #include <curses.h> #include "rogue.h" #include "score.h" /* * save_game: * Implement the "save game" command */ void save_game(void) { FILE *savef; int c; char buf[MAXSTR]; struct stat sbuf; /* * get file name */ mpos = 0; over: if (file_name[0] != '\0') { for (;;) { if (use_savedir) msg("Save game? "); else msg("Save file (%s)? ", file_name); c = readchar(); mpos = 0; if (c == ESCAPE) { msg(""); return; } else if (c == 'n' || c == 'N' || c == 'y' || c == 'Y') break; else msg("please answer Y or N"); } if (c == 'y' || c == 'Y') { addstr("Yes\n"); refresh(); strcpy(buf, file_name); goto gotfile; } } if (use_savedir) /* User chose N, changing location isn't allowed. */ goto quit_it; do { mpos = 0; msg("file name: "); buf[0] = '\0'; if (get_str(buf, stdscr) == QUIT) { quit_it: msg(""); return; } mpos = 0; gotfile: /* * test to see if the file exists */ if (stat(buf, &sbuf) >= 0 && !use_savedir) { for (;;) { msg("File exists. Do you wish to overwrite it?"); mpos = 0; if ((c = readchar()) == ESCAPE) goto quit_it; if (c == 'y' || c == 'Y') break; else if (c == 'n' || c == 'N') goto over; else msg("Please answer Y or N"); } msg("file name: %s", buf); md_unlink(file_name); } strcpy(file_name, buf); if ((savef = fopen(file_name, "w")) == NULL) { msg(strerror(errno)); if (use_savedir) return; } } while (savef == NULL); msg(""); save_file(savef); /* NOTREACHED */ } /* * auto_save: * Automatically save a file. This is used if a HUP signal is * recieved */ void auto_save(int sig) { FILE *savef; NOOP(sig); md_ignoreallsignals(); if (file_name[0] != '\0' && ((savef = fopen(file_name, "w")) != NULL || (md_unlink_open_file(file_name, savef) >= 0 && (savef = fopen(file_name, "w")) != NULL))) save_file(savef); exit(0); } /* * save_file: * Write the saved game on the file */ void save_file(FILE *savef) { char buf[80]; mvcur(0, COLS - 1, LINES - 1, 0); putchar('\n'); endwin(); resetltchars(); md_chmod(file_name, 0644); encwrite(version, strlen(version)+1, savef); sprintf(buf,"%d x %d\n", LINES, COLS); encwrite(buf,80,savef); rs_save_file(savef); fflush(savef); fclose(savef); printf("See you soon, %s!\n", whoami); exit(0); } /* * restore: * Restore a saved game from a file with elaborate checks for file * integrity from cheaters */ int restore(const char *file) { FILE *inf; int syml; char buf[MAXSTR]; struct stat sbuf2; int lines, cols; if (strcmp(file, "-r") == 0) file = file_name; md_tstphold(); if ((inf = fopen(file,"r")) == NULL) { /* If a system savefile doesn't exist, start a new game. */ if (use_savedir && errno == ENOENT) return TRUE; perror(file); return FALSE; } stat(file, &sbuf2); syml = is_symlink(file); fflush(stdout); encread(buf, strlen(version) + 1, inf); if (strcmp(buf, version) != 0) { printf("Sorry, saved game is out of date.\n"); return FALSE; } encread(buf,80,inf); (void) sscanf(buf,"%d x %d\n", &lines, &cols); initscr(); /* Start up cursor package */ keypad(stdscr, 1); if (lines > LINES) { endwin(); printf("Sorry, original game was played on a screen with %d lines.\n",lines); printf("Current screen only has %d lines. Unable to restore game\n",LINES); return(FALSE); } if (cols > COLS) { endwin(); printf("Sorry, original game was played on a screen with %d columns.\n",cols); printf("Current screen only has %d columns. Unable to restore game\n",COLS); return(FALSE); } hw = newwin(LINES, COLS, 0, 0); setup(); rs_restore_file(inf); /* * we do not close the file so that we will have a hold of the * inode for as long as possible */ if ( #ifdef MASTER !wizard && #endif md_unlink_open_file(file, inf) < 0) { printf("Cannot unlink file\n"); return FALSE; } mpos = 0; /* printw(0, 0, "%s: %s", file, ctime(&sbuf2.st_mtime)); */ /* printw("%s: %s", file, ctime(&sbuf2.st_mtime)); */ clearok(stdscr,TRUE); /* * defeat multiple restarting from the same place */ #ifdef MASTER if (!wizard) #endif if (sbuf2.st_nlink != 1 || syml) { endwin(); printf("\nCannot restore from a linked file\n"); return FALSE; } if (pstats.s_hpt <= 0) { endwin(); printf("\n\"He's dead, Jim\"\n"); return FALSE; } md_tstpresume(); strcpy(file_name, file); clearok(curscr, TRUE); srand(md_getpid()); msg("file name: %s", file); playit(); /*NOTREACHED*/ return(0); } static int encerrno = 0; int encerror() { return encerrno; } void encseterr(int err) { encerrno = err; } int encclearerr() { int n = encerrno; encerrno = 0; return(n); } /* * encwrite: * Perform an encrypted write */ size_t encwrite(const char *start, size_t size, FILE *outf) { const char *e1, *e2; char fb; int temp; size_t o_size = size; e1 = encstr; e2 = statlist; fb = 0; if (encerrno) { errno = encerrno; return 0; } while(size) { if (putc(*start++ ^ *e1 ^ *e2 ^ fb, outf) == EOF) { encerrno = errno; break; } temp = *e1++; fb = fb + ((char) (temp * *e2++)); if (*e1 == '\0') e1 = encstr; if (*e2 == '\0') e2 = statlist; size--; } return(o_size - size); } /* * encread: * Perform an encrypted read */ size_t encread(char *start, size_t size, FILE *inf) { const char *e1, *e2; char fb; int temp; size_t read_size; size_t items; fb = 0; if (encerrno) { errno = encerrno; return 0; } items = read_size = fread(start,1,size,inf); e1 = encstr; e2 = statlist; while (read_size--) { *start++ ^= *e1 ^ *e2 ^ fb; temp = *e1++; fb = fb + (char)(temp * *e2++); if (*e1 == '\0') e1 = encstr; if (*e2 == '\0') e2 = statlist; } if (items != size) encerrno = errno; return(items); } /* * read_scrore * Read in the score file */ void rd_score(SCORE *top_ten) { char scoreline[100]; int i; if (scoreboard == NULL) return; rewind(scoreboard); for(i = 0; i < numscores; i++) { encread(top_ten[i].sc_name, MAXSTR, scoreboard); scoreline[0] = '\0'; encread(scoreline, 100, scoreboard); (void) sscanf(scoreline, " %u %d %u %d %d %x \n", &top_ten[i].sc_uid, &top_ten[i].sc_score, &top_ten[i].sc_flags, &top_ten[i].sc_monster, &top_ten[i].sc_level, &top_ten[i].sc_time); } rewind(scoreboard); } /* * write_scrore * Read in the score file */ void wr_score(SCORE *top_ten) { char scoreline[100]; int i; if (scoreboard == NULL) return; rewind(scoreboard); encerrno = 0; for(i = 0; i < numscores; i++) { memset(scoreline,0,100); encwrite(top_ten[i].sc_name, MAXSTR, scoreboard); sprintf(scoreline, " %u %d %u %u %d %x \n", top_ten[i].sc_uid, top_ten[i].sc_score, top_ten[i].sc_flags, top_ten[i].sc_monster, top_ten[i].sc_level, top_ten[i].sc_time); encwrite(scoreline,100,scoreboard); } rewind(scoreboard); }