/*	SCCS Id: @(#)files.c	3.3	97/01/26	*/
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

#include "hack.h"
#include "dlb.h"

#include <ctype.h>

#if !defined(MAC) && !defined(O_WRONLY) && !defined(AZTEC_C)
#include <fcntl.h>
#endif
#if defined(UNIX) || defined(VMS)
#include <errno.h>
# ifndef SKIP_ERRNO
extern int errno;
# endif
#include <signal.h>
#endif

#if defined(MSDOS) || defined(OS2) || defined(TOS) || defined(WIN32)
# ifndef GNUDOS
#include <sys\stat.h>
# else
#include <sys/stat.h>
# endif
#endif
#ifndef O_BINARY	/* used for micros, no-op for others */
# define O_BINARY 0
#endif

#if !defined(MFLOPPY) && !defined(VMS) && !defined(WIN32)
char bones[] = "bonesnn.xxx";
char lock[PL_NSIZ+14] = "1lock"; /* long enough for uid+name+.99 */
#else
# if defined(MFLOPPY)
char bones[FILENAME];		/* pathname of bones files */
char lock[FILENAME];		/* pathname of level files */
# endif
# if defined(VMS)
char bones[] = "bonesnn.xxx;1";
char lock[PL_NSIZ+17] = "1lock"; /* long enough for _uid+name+.99;1 */
# endif
# if defined(WIN32)
char bones[] = "bonesnn.xxx";
char lock[PL_NSIZ+25];		/* long enough for username+.+name+.99 */
# endif
#endif

#if defined(UNIX) || defined(__BEOS__)
#define SAVESIZE	(PL_NSIZ + 13)	/* save/99999player.e */
#else
# ifdef VMS
#define SAVESIZE	(PL_NSIZ + 22)	/* [.save]<uid>player.e;1 */
# else
#  if defined(WIN32)
#define SAVESIZE	(PL_NSIZ + 40)	/* username-player.NetHack-saved-game */
#  else
#define SAVESIZE	FILENAME	/* from macconf.h or pcconf.h */
#  endif
# endif
#endif

char SAVEF[SAVESIZE];	/* holds relative path of save file from playground */
#ifdef MICRO
char SAVEP[SAVESIZE];	/* holds path of directory for save file */
#endif

#ifdef AMIGA
extern char PATH[];	/* see sys/amiga/amidos.c */
extern char bbs_id[];
static int lockptr;
# ifdef __SASC_60
#include <proto/dos.h>
# endif

#include <libraries/dos.h>
#endif

#if defined(WIN32) || defined(MSDOS)
static int lockptr;
# ifdef MSDOS
#define Delay(a) msleep(a)
# endif
#define Close close
#define DeleteFile unlink
#endif

extern int n_dgns;		/* from dungeon.c */

STATIC_DCL char *FDECL(set_bonesfile_name, (char *,d_level*));
STATIC_DCL char *NDECL(set_bonestemp_name);
STATIC_DCL char *FDECL(make_lockname, (const char *,char *));
STATIC_DCL FILE *FDECL(fopen_config_file, (const char *));
STATIC_DCL int FDECL(get_uchars, (FILE *,char *,char *,uchar *,int,const char *));
int FDECL(parse_config_line, (FILE *,char *,char *,char *));

#ifdef WIN32
extern void NDECL(dircheck);
#endif

/* fopen a file, with OS-dependent bells and whistles */
/* NOTE: a simpler version of this routine also exists in util/dlb_main.c */
FILE *
fopen_datafile(filename, mode)
const char *filename, *mode;
{
	FILE *fp;
#ifdef WIN32
	dircheck();
#endif
#ifdef AMIGA
	fp = fopenp(filename, mode);
#else
# ifdef VMS	/* essential to have punctuation, to avoid logical names */
	char tmp[BUFSIZ];

	if (!index(filename, '.') && !index(filename, ';'))
		filename = strcat(strcpy(tmp, filename), ";0");
	fp = fopen(filename, mode, "mbc=16");
# else
	fp = fopen(filename, mode);
# endif
#endif
	return fp;
}

/* ----------  BEGIN LEVEL FILE HANDLING ----------- */

#ifdef MFLOPPY
/* Set names for bones[] and lock[] */
void
set_lock_and_bones()
{
	if (!ramdisk) {
		Strcpy(levels, permbones);
		Strcpy(bones, permbones);
	}
	append_slash(permbones);
	append_slash(levels);
#ifdef AMIGA
	strncat(levels, bbs_id, PATHLEN);
#endif
	append_slash(bones);
	Strcat(bones, "bonesnn.*");
	Strcpy(lock, levels);
	Strcat(lock, alllevels);
	return;
}
#endif /* MFLOPPY */


/* Construct a file name for a level-type file, which is of the form
 * something.level (with any old level stripped off).
 * This assumes there is space on the end of 'file' to append
 * a two digit number.  This is true for 'level'
 * but be careful if you use it for other things -dgk
 */
void
set_levelfile_name(file, lev)
char *file;
int lev;
{
	char *tf;

	tf = rindex(file, '.');
	if (!tf) tf = eos(file);
	Sprintf(tf, ".%d", lev);
#ifdef VMS
	Strcat(tf, ";1");
#endif
	return;
}

int
create_levelfile(lev)
int lev;
{
	int fd;

#ifdef WIN32
	dircheck();
#endif
	set_levelfile_name(lock, lev);

#if defined(MICRO)
	/* Use O_TRUNC to force the file to be shortened if it already
	 * exists and is currently longer.
	 */
	fd = open(lock, O_WRONLY |O_CREAT | O_TRUNC | O_BINARY, FCMASK);
#else
# ifdef MAC
	fd = maccreat(lock, LEVL_TYPE);
# else
	fd = creat(lock, FCMASK);
# endif
#endif /* MICRO */

	if (fd >= 0)
	    level_info[lev].flags |= LFILE_EXISTS;

	return fd;
}


int
open_levelfile(lev)
int lev;
{
	int fd;

#ifdef WIN32
	dircheck();
#endif
	set_levelfile_name(lock, lev);
#ifdef MFLOPPY
	/* If not currently accessible, swap it in. */
	if (level_info[lev].where != ACTIVE)
		swapin_file(lev);
#endif
#ifdef MAC
	fd = macopen(lock, O_RDONLY | O_BINARY, LEVL_TYPE);
#else
	fd = open(lock, O_RDONLY | O_BINARY, 0);
#endif
	return fd;
}


void
delete_levelfile(lev)
int lev;
{
#ifdef WIN32
	dircheck();
#endif
	/*
	 * Level 0 might be created by port specific code that doesn't
	 * call create_levfile(), so always assume that it exists.
	 */
	if (lev == 0 || (level_info[lev].flags & LFILE_EXISTS)) {
		set_levelfile_name(lock, lev);
		(void) unlink(lock);
		level_info[lev].flags &= ~LFILE_EXISTS;
	}
}


void
clearlocks()
{
#if defined(MFLOPPY) && !defined(AMIGA)
	eraseall(levels, alllevels);
	if (ramdisk)
		eraseall(permbones, alllevels);
#else
	register int x;

# if defined(UNIX) || defined(VMS)
	(void) signal(SIGHUP, SIG_IGN);
# endif
	/* can't access maxledgerno() before dungeons are created -dlc */
	for (x = (n_dgns ? maxledgerno() : 0); x >= 0; x--)
		delete_levelfile(x);	/* not all levels need be present */
#endif
}

/* ----------  END LEVEL FILE HANDLING ----------- */


/* ----------  BEGIN BONES FILE HANDLING ----------- */

/* set up "file" to be file name for retrieving bones, and return a
 * bonesid to be read/written in the bones file.
 */
STATIC_OVL char *
set_bonesfile_name(file, lev)
char *file;
d_level *lev;
{
	s_level *sptr;
	char *dptr;

	Sprintf(file, "bon%c%s", dungeons[lev->dnum].boneid,
			In_quest(lev) ? urole.filecode : "0");
	dptr = eos(file);
	if ((sptr = Is_special(lev)) != 0)
	    Sprintf(dptr, ".%c", sptr->boneid);
	else
	    Sprintf(dptr, ".%d", lev->dlevel);
#ifdef VMS
	Strcat(dptr, ";1");
#endif
	return(dptr-2);
}

/* set up temporary file name for writing bones, to avoid another game's
 * trying to read from an uncompleted bones file.  we want an uncontentious
 * name, so use one in the namespace reserved for this game's level files.
 * (we are not reading or writing level files while writing bones files, so
 * the same array may be used instead of copying.)
 */
STATIC_OVL char *
set_bonestemp_name()
{
	char *tf;

	tf = rindex(lock, '.');
	if (!tf) tf = eos(lock);
	Sprintf(tf, ".bn");
#ifdef VMS
	Strcat(tf, ";1");
#endif
	return lock;
}

int
create_bonesfile(lev, bonesid)
d_level *lev;
char **bonesid;
{
	char *file;
	int fd;

#ifdef WIN32
	dircheck();
#endif
	*bonesid = set_bonesfile_name(bones, lev);
	file = set_bonestemp_name();

#ifdef MICRO
	/* Use O_TRUNC to force the file to be shortened if it already
	 * exists and is currently longer.
	 */
	fd = open(file, O_WRONLY |O_CREAT | O_TRUNC | O_BINARY, FCMASK);
#else
# ifdef MAC
	fd = maccreat(file, BONE_TYPE);
# else
	fd = creat(file, FCMASK);
# endif
# if defined(VMS) && !defined(SECURE)
	/*
	   Re-protect bones file with world:read+write+execute+delete access.
	   umask() doesn't seem very reliable; also, vaxcrtl won't let us set
	   delete access without write access, which is what's really wanted.
	   Can't simply create it with the desired protection because creat
	   ANDs the mask with the user's default protection, which usually
	   denies some or all access to world.
	 */
	(void) chmod(file, FCMASK | 007);  /* allow other users full access */
# endif /* VMS && !SECURE */
#endif /* MICRO */

	return fd;
}

#ifdef MFLOPPY
/* remove partial bonesfile in process of creation */
void
cancel_bonesfile()
{
	char *tempname;

	tempname = set_bonestemp_name();
	(void) unlink(tempname);
}
#endif /* MFLOPPY */

/* move completed bones file to proper name */
void
commit_bonesfile(lev)
d_level *lev;
{
	char *tempname;
	int ret;

	(void) set_bonesfile_name(bones, lev);
	tempname = set_bonestemp_name();

#if (defined(SYSV) && !defined(SVR4)) || defined(GENIX)
	/* old SYSVs don't have rename.  Some SVR3's may, but since they
	 * also have link/unlink, it doesn't matter. :-)
	 */
	(void) unlink(bones);
	ret = link(tempname, bones);
	ret += unlink(tempname);
#else
	ret = rename(tempname, bones);
#endif
#ifdef WIZARD
	if (wizard && ret != 0)
		pline("couldn't rename %s to %s", tempname, bones);
#endif
}


int
open_bonesfile(lev, bonesid)
d_level *lev;
char **bonesid;
{
	int fd;

#ifdef WIN32
	dircheck();
#endif
	*bonesid = set_bonesfile_name(bones, lev);
	uncompress(bones);	/* no effect if nonexistent */
#ifdef MAC
	fd = macopen(bones, O_RDONLY | O_BINARY, BONE_TYPE);
#else
	fd = open(bones, O_RDONLY | O_BINARY, 0);
#endif
	return fd;
}


int
delete_bonesfile(lev)
d_level *lev;
{
#ifdef WIN32
	dircheck();
#endif
	(void) set_bonesfile_name(bones, lev);
	return !(unlink(bones) < 0);
}


/* assume we're compressing the recently read or created bonesfile, so the
 * file name is already set properly */
void
compress_bonesfile()
{
	compress(bones);
}

/* ----------  END BONES FILE HANDLING ----------- */


/* ----------  BEGIN SAVE FILE HANDLING ----------- */

/* set savefile name in OS-dependent manner from pre-existing plname,
 * avoiding troublesome characters */
void
set_savefile_name()
{
#ifdef VMS
	Sprintf(SAVEF, "[.save]%d%s", getuid(), plname);
	regularize(SAVEF+7);
	Strcat(SAVEF, ";1");
#else
# if defined(MICRO) && !defined(WIN32)
	Strcpy(SAVEF, SAVEP);
#  ifdef AMIGA
	strncat(SAVEF, bbs_id, PATHLEN);
#  endif
	{
		int i = strlen(SAVEP);
#  ifdef AMIGA
		/* plname has to share space with SAVEP and ".sav" */
		(void)strncat(SAVEF, plname, FILENAME - i - 4);
#  else
		(void)strncat(SAVEF, plname, 8);
#  endif
		regularize(SAVEF+i);
	}
	Strcat(SAVEF, ".sav");
# else
#  if defined(WIN32)
	Sprintf(SAVEF,"%s-%s.NetHack-saved-game",get_username(0), plname);
#  else
	Sprintf(SAVEF, "save/%d%s", (int)getuid(), plname);
	regularize(SAVEF+5);	/* avoid . or / in name */
#  endif /* WIN32 */
# endif	/* MICRO */
#endif /* VMS   */
}

#ifdef INSURANCE
void
save_savefile_name(fd)
int fd;
{
	(void) write(fd, (genericptr_t) SAVEF, sizeof(SAVEF));
}
#endif


#if defined(WIZARD) && !defined(MICRO)
/* change pre-existing savefile name to indicate an error savefile */
void
set_error_savefile()
{
# ifdef VMS
      {
	char *semi_colon = rindex(SAVEF, ';');
	if (semi_colon) *semi_colon = '\0';
      }
	Strcat(SAVEF, ".e;1");
# else
#  ifdef MAC
	Strcat(SAVEF, "-e");
#  else
	Strcat(SAVEF, ".e");
#  endif
# endif
}
#endif


/* create save file, overwriting one if it already exists */
int
create_savefile()
{
	int fd;
#ifdef WIN32
	dircheck();
#endif
#ifdef AMIGA
	fd = ami_wbench_getsave(O_WRONLY | O_CREAT | O_TRUNC);
#else
# ifdef MICRO
	fd = open(SAVEF, O_WRONLY | O_BINARY | O_CREAT | O_TRUNC, FCMASK);
# else
#  ifdef MAC
	fd = maccreat(SAVEF, SAVE_TYPE);
#  else
	fd = creat(SAVEF, FCMASK);
#  endif
#  if defined(VMS) && !defined(SECURE)
	/*
	   Make sure the save file is owned by the current process.  That's
	   the default for non-privileged users, but for priv'd users the
	   file will be owned by the directory's owner instead of the user.
	 */
#   ifdef getuid	/*(see vmsunix.c)*/
#    undef getuid
#   endif
	(void) chown(SAVEF, getuid(), getgid());
#  endif /* VMS && !SECURE */
# endif	/* MICRO */
#endif	/* AMIGA */

	return fd;
}


/* open savefile for reading */
int
open_savefile()
{
	int fd;

#ifdef WIN32
	dircheck();
#endif
#ifdef AMIGA
	fd = ami_wbench_getsave(O_RDONLY);
#else
# ifdef MAC
	fd = macopen(SAVEF, O_RDONLY | O_BINARY, SAVE_TYPE);
# else
	fd = open(SAVEF, O_RDONLY | O_BINARY, 0);
# endif
#endif /* AMIGA */
	return fd;
}


/* delete savefile */
int
delete_savefile()
{
#ifdef AMIGA
	ami_wbench_unlink(SAVEF);
#endif
	(void) unlink(SAVEF);
	return 0;	/* for restore_saved_game() (ex-xxxmain.c) test */
}


/* try to open up a save file and prepare to restore it */
int
restore_saved_game()
{
	int fd;
#ifdef WIN32
	dircheck();
#endif

	set_savefile_name();
#ifdef MFLOPPY
	if (
# ifdef AMIGA
	    !(FromWBench || saveDiskPrompt(1))
# else
	    !saveDiskPrompt(1)
# endif
	  ) return -1;
#endif /* MFLOPPY */

	uncompress(SAVEF);
	if ((fd = open_savefile()) < 0) return fd;

	if (!uptodate(fd, SAVEF)) {
	    (void) close(fd),  fd = -1;
	    (void) delete_savefile();
	}
	return fd;
}

/* ----------  END SAVE FILE HANDLING ----------- */


/* ----------  BEGIN FILE COMPRESSION HANDLING ----------- */

#ifdef COMPRESS

void
redirect(filename, mode, stream, uncomp)
char *filename, *mode;
FILE *stream;
boolean uncomp;
{
#ifdef WIN32
	dircheck();
#endif
	if (freopen(filename, mode, stream) == (FILE *)0) {
		(void) fprintf(stderr, "freopen of %s for %scompress failed\n",
			filename, uncomp ? "un" : "");
		terminate(EXIT_FAILURE);
	}
}

/*
 * using system() is simpler, but opens up security holes and causes
 * problems on at least Interactive UNIX 3.0.1 (SVR3.2), where any
 * setuid is renounced by /bin/sh, so the files cannot be accessed.
 *
 * cf. child() in unixunix.c.
 */
void
docompress_file(filename, uncomp)
char *filename;
boolean uncomp;
{
	char cfn[80];
	FILE *cf;
	const char *args[10];
# ifdef COMPRESS_OPTIONS
	char opts[80];
# endif
	int i = 0;
	int f;

#ifdef WIN32
	dircheck();
#endif
	Strcpy(cfn, filename);
# ifdef COMPRESS_EXTENSION
	Strcat(cfn, COMPRESS_EXTENSION);
# endif
	/* when compressing, we know the file exists */
	if (uncomp) {
	    if ((cf = fopen(cfn, RDBMODE)) == (FILE *)0)
		    return;
	    (void) fclose(cf);
	}

	args[0] = COMPRESS;
	if (uncomp) args[++i] = "-d";	/* uncompress */
# ifdef COMPRESS_OPTIONS
	{
	    /* we can't guarantee there's only one additional option, sigh */
	    char *opt;
	    boolean inword = FALSE;

	    Strcpy(opts, COMPRESS_OPTIONS);
	    opt = opts;
	    while (*opt) {
		if ((*opt == ' ') || (*opt == '\t')) {
		    if (inword) {
			*opt = '\0';
			inword = FALSE;
		    }
		} else if (!inword) {
		    args[++i] = opt;
		    inword = TRUE;
		}
		opt++;
	    }
	}
# endif
	args[++i] = (char *)0;

	f = fork();
	if (f == 0) {	/* child */
		/* run compressor without privileges, in case other programs
		 * have surprises along the line of gzip once taking filenames
		 * in GZIP.
		 */
		/* assume all compressors will compress stdin to stdout
		 * without explicit filenames.  this is true of at least
		 * compress and gzip, those mentioned in config.h.
		 */
		if (uncomp) {
			redirect(cfn, RDBMODE, stdin, uncomp);
			redirect(filename, WRBMODE, stdout, uncomp);
		} else {
			redirect(filename, RDBMODE, stdin, uncomp);
			redirect(cfn, WRBMODE, stdout, uncomp);
		}
		(void) setgid(getgid());
		(void) setuid(getuid());
		(void) execv(args[0], (char *const *) args);
		perror((char *)0);
		(void) fprintf(stderr, "Exec to %scompress %s failed.\n",
			uncomp ? "un" : "", filename);
		terminate(EXIT_FAILURE);
	} else if (f == -1) {
		perror((char *)0);
		pline("Fork to %scompress %s failed.",
			uncomp ? "un" : "", filename);
		return;
	}
	(void) signal(SIGINT, SIG_IGN);
	(void) signal(SIGQUIT, SIG_IGN);
	(void) wait((int *)&i);
	(void) signal(SIGINT, (SIG_RET_TYPE) done1);
# ifdef WIZARD
	if (wizard) (void) signal(SIGQUIT, SIG_DFL);
# endif
	if (i == 0) {
	    /* (un)compress succeeded: remove file left behind */
	    if (uncomp)
		(void) unlink(cfn);
	    else
		(void) unlink(filename);
	} else {
	    /* (un)compress failed; remove the new, bad file */
	    if (uncomp) {
		raw_printf("Unable to uncompress %s", filename);
		(void) unlink(filename);
	    } else {
		/* no message needed for compress case; life will go on */
		(void) unlink(cfn);
	    }
	}
}
#endif	/* COMPRESS */

/* compress file */
void
compress(filename)
const char *filename;
#ifdef applec
# pragma unused(filename)
#endif
{
#ifdef COMPRESS
	docompress_file(filename, FALSE);
#endif
}


/* uncompress file if it exists */
void
uncompress(filename)
const char *filename;
#ifdef applec
# pragma unused(filename)
#endif
{
#ifdef COMPRESS
	docompress_file(filename, TRUE);
#endif
}

/* ----------  END FILE COMPRESSION HANDLING ----------- */


/* ----------  BEGIN FILE LOCKING HANDLING ----------- */

static int nesting = 0;

#ifdef NO_FILE_LINKS	/* implies UNIX */
static int lockfd;	/* for lock_file() to pass to unlock_file() */
#endif

#define HUP	if (!program_state.done_hup)

STATIC_OVL char *
make_lockname(filename, lockname)
const char *filename;
char *lockname;
{
#if defined(UNIX) || defined(VMS) || defined(AMIGA) || defined(WIN32) || defined(MSDOS)
# ifdef NO_FILE_LINKS
	Strcpy(lockname, LOCKDIR);
	Strcat(lockname, "/");
	Strcat(lockname, filename);
# else
	Strcpy(lockname, filename);
# endif
# ifdef VMS
      {
	char *semi_colon = rindex(lockname, ';');
	if (semi_colon) *semi_colon = '\0';
      }
	Strcat(lockname, ".lock;1");
# else
	Strcat(lockname, "_lock");
# endif
	return lockname;
#else
	lockname[0] = '\0';
	return (char*)0;
#endif  /* UNIX || VMS || AMIGA || WIN32 || MSDOS */
}


/* lock a file */
boolean
lock_file(filename, retryct)
const char *filename;
int retryct;
#ifdef applec
# pragma unused(filename, retryct)
#endif
{
	char *lockname, locknambuf[BUFSZ];

#ifdef WIN32
	dircheck();
#endif
	nesting++;
	if (nesting > 1) {
	    impossible("TRIED TO NEST LOCKS");
	    return TRUE;
	}

	lockname = make_lockname(filename, locknambuf);

#if defined(UNIX) || defined(VMS)
# ifdef NO_FILE_LINKS
	while ((lockfd = open(lockname, O_RDWR|O_CREAT|O_EXCL, 0666)) == -1) {
# else
	while (link(filename, lockname) == -1) {
# endif
	    register int errnosv = errno;

	    switch (errnosv) {	/* George Barbanis */
	    case EEXIST:
		if (retryct--) {
		    HUP raw_printf(
			    "Waiting for access to %s.  (%d retries left).",
			    filename, retryct);
# if defined(SYSV) || defined(ULTRIX) || defined(VMS)
		    (void)
# endif
			sleep(1);
		} else {
		    HUP (void) raw_print("I give up.  Sorry.");
		    HUP raw_printf("Perhaps there is an old %s around?",
					lockname);
		    nesting--;
		    return FALSE;
		}

		break;
	    case ENOENT:
		HUP raw_printf("Can't find file %s to lock!", filename);
		nesting--;
		return FALSE;
	    case EACCES:
		HUP raw_printf("No write permission to lock %s!", filename);
		nesting--;
		return FALSE;
# ifdef VMS			/* c__translate(vmsfiles.c) */
	    case EPERM:
		/* could be misleading, but usually right */
		HUP raw_printf("Can't lock %s due to directory protection.",
			       filename);
		nesting--;
		return FALSE;
# endif
	    default:
		HUP perror(lockname);
		HUP raw_printf(
			     "Cannot lock %s for unknown reason (%d).",
			       filename, errnosv);
		nesting--;
		return FALSE;
	    }

	}
#endif  /* UNIX || VMS */

#if defined(AMIGA) || defined(WIN32) || defined(MSDOS)
    lockptr = 0;
    while (retryct-- && !lockptr) {
# ifdef AMIGA
	(void)DeleteFile(lockname); /* in case dead process was here first */
	lockptr = Open(lockname,MODE_NEWFILE);
# else
	lockptr = open(lockname, O_RDWR|O_CREAT|O_EXCL, S_IWRITE);
# endif
	if (!lockptr) {
	    raw_printf("Waiting for access to %s.  (%d retries left).",
			filename, retryct);
	    Delay(50);
	}
    }
    if (!retryct) {
	raw_printf("I give up.  Sorry.");
	nesting--;
	return FALSE;
    }
#endif /* AMIGA || WIN32 || MSDOS */
	return TRUE;
}


#ifdef VMS	/* for unlock_file, use the unlink() routine in vmsunix.c */
# ifdef unlink
#  undef unlink
# endif
# define unlink(foo) vms_unlink(foo)
#endif

/* unlock file, which must be currently locked by lock_file */
void
unlock_file(filename)
const char *filename;
#if defined(applec)
# pragma unused(filename)
#endif
{
	char *lockname, locknambuf[BUFSZ];

	if (nesting == 1) {
		lockname = make_lockname(filename, locknambuf);

#ifdef WIN32
	dircheck();
#endif
#if defined(UNIX) || defined(VMS)
		if (unlink(lockname) < 0)
			HUP raw_printf("Can't unlink %s.", lockname);
# ifdef NO_FILE_LINKS
		(void) close(lockfd);
# endif

#endif  /* UNIX || VMS */

#if defined(AMIGA) || defined(WIN32) || defined(MSDOS)
		if (lockptr) Close(lockptr);
		DeleteFile(lockname);
		lockptr = 0;
#endif /* AMIGA || WIN32 || MSDOS */
	}

	nesting--;
}

/* ----------  END FILE LOCKING HANDLING ----------- */


/* ----------  BEGIN CONFIG FILE HANDLING ----------- */

const char *configfile =
#ifdef UNIX
			".nethackrc";
#else
# if defined(MAC) || defined(__BEOS__)
			"NetHack Defaults";
# else
#  if defined(MSDOS) || defined(WIN32)
			"defaults.nh";
#  else
			"NetHack.cnf";
#  endif
# endif
#endif


#ifdef MSDOS
/* conflict with speed-dial under windows
 * for XXX.cnf file so support of NetHack.cnf
 * is for backward compatibility only.
 * Preferred name (and first tried) is now defaults.nh but
 * the game will try the old name if there
 * is no defaults.nh.
 */
const char *backward_compat_configfile = "nethack.cnf"; 
#endif

#ifndef MFLOPPY
#define fopenp fopen
#endif

STATIC_OVL FILE *
fopen_config_file(filename)
const char *filename;
{
	FILE *fp;
#if defined(UNIX) || defined(VMS)
	char	tmp_config[BUFSZ];
#endif

#ifdef WIN32
	dircheck();
#endif
	/* "filename" is an environment variable, so it should hang around */
	if (filename) {
#ifdef UNIX
		if (access(filename, 4) == -1) {
			/* 4 is R_OK on newer systems */
			/* nasty sneaky attempt to read file through
			 * NetHack's setuid permissions -- this is the only
			 * place a file name may be wholly under the player's
			 * control
			 */
			raw_printf("Access to %s denied (%d).",
					filename, errno);
			wait_synch();
			/* fall through to standard names */
		} else
#endif
		if ((fp = fopenp(filename, "r")) != (FILE *)0) {
			configfile = filename;
			return(fp);
		}
	}

#if defined(MICRO) || defined(MAC) || defined(__BEOS__)
	if ((fp = fopenp(configfile, "r")) != (FILE *)0)
		return(fp);
# ifdef MSDOS
	else if ((fp = fopenp(backward_compat_configfile, "r")) != (FILE *)0)
		return(fp);
# endif
#else
# ifdef VMS
	if ((fp = fopenp("nethackini", "r")) != (FILE *)0) {
		configfile = "nethackini";
		return(fp);
	}
	if ((fp = fopenp("sys$login:nethack.ini", "r")) != (FILE *)0) {
		configfile = "nethack.ini";
		return(fp);
	}
	Sprintf(tmp_config, "%s%s", getenv("HOME"), "NetHack.cnf");
	if ((fp = fopenp(tmp_config, "r")) != (FILE *)0)
		return(fp);
# else	/* should be only UNIX left */
	Sprintf(tmp_config, "%s/%s", getenv("HOME"), ".nethackrc");
	if ((fp = fopenp(tmp_config, "r")) != (FILE *)0)
		return(fp);
# endif
#endif
	return (FILE *)0;

}


/*
 * Retrieve a list of integers from a file into a uchar array.
 *
 * NOTE:  This routine is unable to read a value of 0.
 */
STATIC_OVL int
get_uchars(fp, buf, bufp, list, size, name)
    FILE *fp;		/* input file pointer */
    char *buf;		/* read buffer, must be of size BUFSZ */
    char *bufp;		/* current pointer */
    uchar *list;	/* return list */
    int  size;		/* return list size */
    const char *name;		/* name of option for error message */
{
    unsigned int num = 0;
    int count = 0;

    while (1) {
	switch(*bufp) {
	    case ' ':  case '\0':
	    case '\t': case '\n':
		if (num) {
		    list[count++] =  num;
		    num = 0;
		}
		if (count == size || !*bufp) return count;
		bufp++;
		break;

	    case '0': case '1': case '2': case '3':
	    case '4': case '5': case '6': case '7':
	    case '8': case '9':
		num = num*10 + (*bufp-'0');
		bufp++;
		break;

	    case '\\':
		if (fp == (FILE *)0)
		    goto gi_error;
		do  {
		    if (!fgets(buf, BUFSZ, fp)) goto gi_error;
		} while (buf[0] == '#');
		bufp = buf;
		break;

	    default:
gi_error:
		raw_printf("Syntax error in %s", name);
		wait_synch();
		return count;
	}
    }
    /*NOTREACHED*/
}

#define match_varname(INP,NAM,LEN) match_optname(INP, NAM, LEN, TRUE)

/*ARGSUSED*/
int
parse_config_line(fp, buf, tmp_ramdisk, tmp_levels)
FILE		*fp;
char		*buf;
char		*tmp_ramdisk;
char		*tmp_levels;
#if defined(applec)
# pragma unused(tmp_ramdisk,tmp_levels)
#endif
{
	char		*bufp, *altp;
	uchar   translate[MAXPCHARS];
	int   len;

	if (*buf == '#')
		return 1;

	/* remove trailing whitespace */
	bufp = eos(buf);
	while (--bufp > buf && isspace(*bufp))
		continue;

	if (bufp <= buf)
		return 1;		/* skip all-blank lines */
	else
		*(bufp + 1) = '\0';	/* terminate line */

	/* find the '=' or ':' */
	bufp = index(buf, '=');
	altp = index(buf, ':');
	if (!bufp || (altp && altp < bufp)) bufp = altp;
	if (!bufp) return 0;

	/* skip  whitespace between '=' and value */
	do { ++bufp; } while (isspace(*bufp));

	/* Go through possible variables */
	if (match_varname(buf, "OPTIONS", 4)) {
		parseoptions(bufp, TRUE, TRUE);
		if (plname[0])		/* If a name was given */
			plnamesuffix();	/* set the character class */
#ifdef MICRO
	} else if (match_varname(buf, "HACKDIR", 4)) {
		(void) strncpy(hackdir, bufp, PATHLEN);
# ifdef MFLOPPY
	} else if (match_varname(buf, "RAMDISK", 3)) {
				/* The following ifdef is NOT in the wrong
				 * place.  For now, we accept and silently
				 * ignore RAMDISK */
#  ifndef AMIGA
		(void) strncpy(tmp_ramdisk, bufp, PATHLEN);
#  endif
# endif
	} else if (match_varname(buf, "LEVELS", 4)) {
		(void) strncpy(tmp_levels, bufp, PATHLEN);

	} else if (match_varname(buf, "SAVE", 4)) {
# ifdef MFLOPPY
		extern	int saveprompt;
#endif
		char *ptr;
		if ((ptr = index(bufp, ';')) != 0) {
			*ptr = '\0';
# ifdef MFLOPPY
			if (*(ptr+1) == 'n' || *(ptr+1) == 'N') {
				saveprompt = FALSE;
			}
# endif
		}
#ifdef	MFLOPPY
		else
		    saveprompt = flags.asksavedisk;
#endif

		(void) strncpy(SAVEP, bufp, PATHLEN);
		append_slash(SAVEP);
#endif /* MICRO */

	} else if (match_varname(buf, "NAME", 4)) {
	    (void) strncpy(plname, bufp, PL_NSIZ-1);
	    plnamesuffix();
	} else if (match_varname(buf, "ROLE", 4) ||
		   match_varname(buf, "CHARACTER", 4)) {
	    if ((len = str2role(bufp)) >= 0)
	    	flags.initrole = len;
	} else if (match_varname(buf, "DOGNAME", 3)) {
	    (void) strncpy(dogname, bufp, PL_PSIZ-1);
	} else if (match_varname(buf, "CATNAME", 3)) {
	    (void) strncpy(catname, bufp, PL_PSIZ-1);

	} else if (match_varname(buf, "GRAPHICS", 4)) {
	    len = get_uchars(fp, buf, bufp, translate, MAXPCHARS, "GRAPHICS");
	    assign_graphics(translate, len, MAXPCHARS, 0);
	} else if (match_varname(buf, "DUNGEON", 4)) {
	    len = get_uchars(fp, buf, bufp, translate, MAXDCHARS, "DUNGEON");
	    assign_graphics(translate, len, MAXDCHARS, 0);
	} else if (match_varname(buf, "TRAPS", 4)) {
	    len = get_uchars(fp, buf, bufp, translate, MAXTCHARS, "TRAPS");
	    assign_graphics(translate, len, MAXTCHARS, MAXDCHARS);
	} else if (match_varname(buf, "EFFECTS", 4)) {
	    len = get_uchars(fp, buf, bufp, translate, MAXECHARS, "EFFECTS");
	    assign_graphics(translate, len, MAXECHARS, MAXDCHARS+MAXTCHARS);

	} else if (match_varname(buf, "OBJECTS", 3)) {
	    /* oc_syms[0] is the RANDOM object, unused */
	    (void) get_uchars(fp, buf, bufp, &(oc_syms[1]),
					MAXOCLASSES-1, "OBJECTS");
	} else if (match_varname(buf, "MONSTERS", 3)) {
	    /* monsyms[0] is unused */
	    (void) get_uchars(fp, buf, bufp, &(monsyms[1]),
					MAXMCLASSES-1, "MONSTERS");
#ifdef AMIGA
	} else if (match_varname(buf, "FONT", 4)) {
		char *t;
		extern void amii_set_text_font( char *, int );

		if( t = strchr( buf+5, ':' ) )
		{
		    *t = 0;
		    amii_set_text_font( buf+5, atoi( t + 1 ) );
		    *t = ':';
		}
	} else if (match_varname(buf, "PATH", 4)) {
		(void) strncpy(PATH, bufp, PATHLEN);
#endif
#ifdef AMIGA
	} else if (match_varname(buf, "DEPTH", 5)) {
		extern int amii_numcolors;
		int val = atoi( bufp );
		amii_numcolors = 1L << min( DEPTH, val );
	} else if (match_varname(buf, "DRIPENS", 7)) {
		int i, val;
		char *t;
		for (i = 0, t = strtok(bufp, ",/"); t != (char *)0;
				i < 20 && (t = strtok((char*)0, ",/")), ++i) {
			sscanf(t, "%d", &val );
			flags.amii_dripens[i] = val;
		}
	} else if (match_varname(buf, "SCREENMODE", 10 )) {
		extern long amii_scrnmode;
		if( sscanf(bufp, "%x", &amii_scrnmode) != 1 )
			amii_scrnmode = 0;
	} else if (match_varname(buf, "MSGPENS", 7)) {
		extern int amii_msgAPen, amii_msgBPen;
		char *t = strtok(bufp, ",/");
		if( t )
		{
		    sscanf(t, "%d", &amii_msgAPen);
		    if( t = strtok((char*)0, ",/") )
				sscanf(t, "%d", &amii_msgBPen);
		}
	} else if (match_varname(buf, "TEXTPENS", 8)) {
		extern int amii_textAPen, amii_textBPen;
		char *t = strtok(bufp, ",/");
		if( t )
		{
		    sscanf(t, "%d", &amii_textAPen);
		    if( t = strtok((char*)0, ",/") )
				sscanf(t, "%d", &amii_textBPen);
		}
	} else if (match_varname(buf, "MENUPENS", 8)) {
		extern int amii_menuAPen, amii_menuBPen;
		char *t = strtok(bufp, ",/");
		if( t )
		{
		    sscanf(t, "%d", &amii_menuAPen);
		    if( t = strtok((char*)0, ",/") )
				sscanf(t, "%d", &amii_menuBPen);
		}
	} else if (match_varname(buf, "STATUSPENS", 10)) {
		extern int amii_statAPen, amii_statBPen;
		char *t = strtok(bufp, ",/");
		if( t )
		{
		    sscanf(t, "%d", &amii_statAPen);
		    if( t = strtok((char*)0, ",/") )
				sscanf(t, "%d", &amii_statBPen);
		}
	} else if (match_varname(buf, "OTHERPENS", 9)) {
		extern int amii_otherAPen, amii_otherBPen;
		char *t = strtok(bufp, ",/");
		if( t )
		{
		    sscanf(t, "%d", &amii_otherAPen);
		    if( t = strtok((char*)0, ",/") )
				sscanf(t, "%d", &amii_otherBPen);
		}
	} else if (match_varname(buf, "PENS", 4)) {
		int i;
		char *t;

		for (i = 0, t = strtok(bufp, ",/"); t != (char *)0;
				    t = strtok((char *)0, ",/"), ++i)
		{
			sscanf(t, "%hx", &flags.amii_curmap[i]);
		}
		amii_setpens( amii_numcolors = i );
#endif
#ifdef QT_GRAPHICS
	} else if (match_varname(buf, "QT_TILEWIDTH", 12)) {
		extern char *qt_tilewidth;
		if (qt_tilewidth == NULL)	
			qt_tilewidth=(char *)strdup(bufp);
	} else if (match_varname(buf, "QT_TILEHEIGHT", 13)) {
		extern char *qt_tileheight;
		if (qt_tileheight == NULL)	
			qt_tileheight=(char *)strdup(bufp);
	} else if (match_varname(buf, "QT_FONTSIZE", 11)) {
		extern char *qt_fontsize;
		if (qt_fontsize == NULL)
			qt_fontsize=(char *)strdup(bufp);
#endif
	} else
		return 0;
	return 1;
}

void
read_config_file(filename)
const char *filename;
{
#define tmp_levels	(char *)0
#define tmp_ramdisk	(char *)0

#ifdef MICRO
#undef tmp_levels
	char	tmp_levels[PATHLEN];
# ifdef MFLOPPY
#  ifndef AMIGA
#undef tmp_ramdisk
	char	tmp_ramdisk[PATHLEN];
#  endif
# endif
#endif
	char	buf[4*BUFSZ];
	FILE	*fp;
#ifdef WIN32
	dircheck();
#endif

	if (!(fp = fopen_config_file(filename))) return;

#ifdef MICRO
# ifdef MFLOPPY
#  ifndef AMIGA
	tmp_ramdisk[0] = 0;
#  endif
# endif
	tmp_levels[0] = 0;
#endif

	while (fgets(buf, 4*BUFSZ, fp)) {
		if (!parse_config_line(fp, buf, tmp_ramdisk, tmp_levels)) {
			raw_printf("Bad option line:  \"%s\"", buf);
			wait_synch();
		}
	}
	(void) fclose(fp);

#ifdef MICRO
# ifdef MFLOPPY
	Strcpy(permbones, tmp_levels);
#  ifndef AMIGA
	if (tmp_ramdisk[0]) {
		Strcpy(levels, tmp_ramdisk);
		if (strcmp(permbones, levels))		/* if not identical */
			ramdisk = TRUE;
	} else
#  endif /* AMIGA */
		Strcpy(levels, tmp_levels);

	Strcpy(bones, levels);
# endif /* MFLOPPY */
#endif /* MICRO */
	return;
}

/* ----------  END CONFIG FILE HANDLING ----------- */

/* ----------  BEGIN SCOREBOARD CREATION ----------- */

/* verify that we can write to the scoreboard file; if not, try to create one */
void
check_recordfile(dir)
const char *dir;
#if defined(applec)
# pragma unused(dir)
#endif
{
#if defined(UNIX) || defined(VMS)
	int fd = open(RECORD, O_RDWR, 0);

	if (fd >= 0) {
# ifdef VMS	/* must be stream-lf to use UPDATE_RECORD_IN_PLACE */
		if (!file_is_stmlf(fd)) {
		    raw_printf(	/* note: assume VMS dir has trailing punct */
		  "Warning: scoreboard file %s%s is not in stream_lf format",
				(dir ? dir : "[]"), RECORD);
		    wait_synch();
		}
# endif
	    (void) close(fd);	/* RECORD is accessible */
	} else if ((fd = open(RECORD, O_CREAT|O_RDWR, FCMASK)) >= 0) {
	    (void) close(fd);	/* RECORD newly created */
# if defined(VMS) && !defined(SECURE)
	    /* Re-protect RECORD with world:read+write+execute+delete access. */
	    (void) chmod(RECORD, FCMASK | 007); /* allow everyone full access */
# endif /* VMS && !SECURE */
	} else {
	    raw_printf("Warning: cannot write scoreboard file %s/%s",
			(dir ? dir : "."), RECORD);
	    wait_synch();
	}
#endif  /* !UNIX && !VMS */
#ifdef MICRO
	int fd;
	char tmp[PATHLEN];
# ifdef WIN32
	dircheck();
# endif

# ifdef OS2_CODEVIEW   /* explicit path on opening for OS/2 */
	Strcpy(tmp, dir);
	append_slash(tmp);
	Strcat(tmp, RECORD);
# else
	Strcpy(tmp, RECORD);
# endif

	if ((fd = open(tmp, O_RDWR)) < 0) {
	    /* try to create empty record */
# if defined(AZTEC_C) || defined(_DCC)
	    /* Aztec doesn't use the third argument */
	    /* DICE doesn't like it */
	    if ((fd = open(tmp, O_CREAT|O_RDWR)) < 0) {
# else
	    if ((fd = open(tmp, O_CREAT|O_RDWR, S_IREAD|S_IWRITE)) < 0) {
# endif
	raw_printf("Warning: cannot write record %s", tmp);
		wait_synch();
	    } else
		(void) close(fd);
	} else		/* open succeeded */
	    (void) close(fd);
#else /* MICRO */

# ifdef MAC
	int fd = macopen ( RECORD , O_RDWR | O_CREAT , TEXT_TYPE ) ;

	if ( fd < 0 ) {
		raw_printf ( "Warning: cannot write %s" , RECORD ) ;
	} else {
		close ( fd ) ;
	}
# endif /* MAC */

#endif /* MICRO */
}

/* ----------  END SCOREBOARD CREATION ----------- */

/*files.c*/
