[sgt/putty] / mac / macstore.c

/* $Id: macstore.c,v 1.9 2003/01/18 12:03:28 ben Exp $ */

/*
 * macstore.c: Macintosh-specific impementation of the interface
 * defined in storage.h
 */

#include <MacTypes.h>
#include <Folders.h>
#include <Memory.h>
#include <Resources.h>
#include <TextUtils.h>

#include <string.h>

#include "putty.h"
#include "storage.h"
#include "mac.h"

#define PUTTY_CREATOR	FOUR_CHAR_CODE('pTTY')
#define SESS_TYPE	FOUR_CHAR_CODE('Sess')
#define SEED_TYPE	FOUR_CHAR_CODE('Seed')


OSErr FSpGetDirID(FSSpec *f, long *idp, Boolean makeit);

/*
 * We store each session as a file in the "PuTTY" sub-directory of the
 * preferences folder.  Each (key,value) pair is stored as a resource.
 */

OSErr get_putty_dir(Boolean makeit, short *pVRefNum, long *pDirID)
{
    OSErr error = noErr;
    short prefVRefNum;
    FSSpec puttydir;
    long prefDirID, puttyDirID;

    error = FindFolder(kOnSystemDisk, kPreferencesFolderType, makeit,
		       &prefVRefNum, &prefDirID);
    if (error != noErr) goto out;

    error = FSMakeFSSpec(prefVRefNum, prefDirID, "\pPuTTY", &puttydir);
    if (error != noErr && error != fnfErr) goto out;
    error = FSpGetDirID(&puttydir, &puttyDirID, makeit);
    if (error != noErr) goto out;

    *pVRefNum = prefVRefNum;
    *pDirID = puttyDirID;

  out:
    return error;
}

OSErr get_session_dir(Boolean makeit, short *pVRefNum, long *pDirID) {
    OSErr error = noErr;
    short puttyVRefNum;
    FSSpec sessdir;
    long puttyDirID, sessDirID;

    error = get_putty_dir(makeit, &puttyVRefNum, &puttyDirID);
    if (error != noErr) goto out;
    error = FSMakeFSSpec(puttyVRefNum, puttyDirID, "\pSaved Sessions",
			 &sessdir);
    if (error != noErr && error != fnfErr) goto out;
    error = FSpGetDirID(&sessdir, &sessDirID, makeit);
    if (error != noErr) goto out;

    *pVRefNum = puttyVRefNum;
    *pDirID = sessDirID;

  out:
    return error;
}

OSErr FSpGetDirID(FSSpec *f, long *idp, Boolean makeit) {
    CInfoPBRec pb;
    OSErr error = noErr;

    pb.dirInfo.ioNamePtr = f->name;
    pb.dirInfo.ioVRefNum = f->vRefNum;
    pb.dirInfo.ioDrDirID = f->parID;
    pb.dirInfo.ioFDirIndex = 0;
    error = PBGetCatInfoSync(&pb);
    if (error == fnfErr && makeit)
	return FSpDirCreate(f, smSystemScript, idp);
    if (error != noErr) goto out;
    if ((pb.dirInfo.ioFlAttrib & ioDirMask) == 0) {
	error = dirNFErr;
	goto out;
    }
    *idp = pb.dirInfo.ioDrDirID;

  out:
    return error;
}

struct write_settings {
    int fd;
    FSSpec tmpfile;
    FSSpec dstfile;
};

void *open_settings_w(char const *sessionname) {
    short sessVRefNum, tmpVRefNum;
    long sessDirID, tmpDirID;
    OSErr error;
    Str255 psessionname;
    struct write_settings *ws;
    
    ws = safemalloc(sizeof *ws);
    error = get_session_dir(kCreateFolder, &sessVRefNum, &sessDirID);
    if (error != noErr) goto out;

    c2pstrcpy(psessionname, sessionname);
    error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &ws->dstfile);
    if (error != noErr && error != fnfErr) goto out;
    if (error == fnfErr) {
	FSpCreateResFile(&ws->dstfile, PUTTY_CREATOR, SESS_TYPE,
			 smSystemScript);
	if ((error = ResError()) != noErr) goto out;
    }

    /* Create a temporary file to save to first. */
    error = FindFolder(sessVRefNum, kTemporaryFolderType, kCreateFolder,
		       &tmpVRefNum, &tmpDirID);
    if (error != noErr) goto out;
    error = FSMakeFSSpec(tmpVRefNum, tmpDirID, psessionname, &ws->tmpfile);
    if (error != noErr && error != fnfErr) goto out;
    if (error == noErr) {
	error = FSpDelete(&ws->tmpfile);
	if (error != noErr) goto out;
    }
    FSpCreateResFile(&ws->tmpfile, PUTTY_CREATOR, SESS_TYPE, smSystemScript);
    if ((error = ResError()) != noErr) goto out;

    ws->fd = FSpOpenResFile(&ws->tmpfile, fsWrPerm);
    if (ws->fd == -1) {error = ResError(); goto out;}

    return ws;

  out:
    safefree(ws);
    fatalbox("Failed to open session for write (%d)", error);
}

void write_setting_s(void *handle, char const *key, char const *value) {
    int fd = *(int *)handle;
    Handle h;
    int id;
    OSErr error;

    UseResFile(fd);
    if (ResError() != noErr)
        fatalbox("Failed to open saved session (%d)", ResError());

    error = PtrToHand(value, &h, strlen(value));
    if (error != noErr)
	fatalbox("Failed to allocate memory");
    /* Put the data in a resource. */
    id = Unique1ID(FOUR_CHAR_CODE('TEXT'));
    if (ResError() != noErr)
	fatalbox("Failed to get ID for resource %s (%d)", key, ResError());
    addresource(h, FOUR_CHAR_CODE('TEXT'), id, key);
    if (ResError() != noErr)
	fatalbox("Failed to add resource %s (%d)", key, ResError());
}

void write_setting_i(void *handle, char const *key, int value) {
    int fd = *(int *)handle;
    Handle h;
    int id;
    OSErr error;

    UseResFile(fd);
    if (ResError() != noErr)
        fatalbox("Failed to open saved session (%d)", ResError());

    /* XXX assume all systems have the same "int" format */
    error = PtrToHand(&value, &h, sizeof(int));
    if (error != noErr)
	fatalbox("Failed to allocate memory (%d)", error);

    /* Put the data in a resource. */
    id = Unique1ID(FOUR_CHAR_CODE('Int '));
    if (ResError() != noErr)
	fatalbox("Failed to get ID for resource %s (%d)", key, ResError());
    addresource(h, FOUR_CHAR_CODE('Int '), id, key);
    if (ResError() != noErr)
	fatalbox("Failed to add resource %s (%d)", key, ResError());
}

void close_settings_w(void *handle) {
    struct write_settings *ws = handle;
    OSErr error;

    CloseResFile(ws->fd);
    if ((error = ResError()) != noErr)
	goto out;
    error = FSpExchangeFiles(&ws->tmpfile, &ws->dstfile);
    if (error != noErr) goto out;
    error = FSpDelete(&ws->tmpfile);
    if (error != noErr) goto out;
    return;

  out:
    fatalbox("Close of saved session failed (%d)", error);
    safefree(handle);
}

void *open_settings_r(char const *sessionname)
{
    short sessVRefNum;
    long sessDirID;
    FSSpec sessfile;
    OSErr error;
    Str255 psessionname;

    error = get_session_dir(kDontCreateFolder, &sessVRefNum, &sessDirID);

    c2pstrcpy(psessionname, sessionname);
    error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &sessfile);
    if (error != noErr) goto out;
    return open_settings_r_fsp(&sessfile);

  out:
    return NULL;
}

void *open_settings_r_fsp(FSSpec *sessfile)
{
    OSErr error;
    int fd;
    int *handle;

    fd = FSpOpenResFile(sessfile, fsRdPerm);
    if (fd == 0) {error = ResError(); goto out;}

    handle = safemalloc(sizeof *handle);
    *handle = fd;
    return handle;

  out:
    return NULL;
}

char *read_setting_s(void *handle, char const *key, char *buffer, int buflen) {
    int fd;
    Handle h;
    size_t len;

    if (handle == NULL) goto out;
    fd = *(int *)handle;
    UseResFile(fd);
    if (ResError() != noErr) goto out;
    h = get1namedresource(FOUR_CHAR_CODE('TEXT'), key);
    if (h == NULL) goto out;

    len = GetHandleSize(h);
    if (len + 1 > buflen) goto out;
    memcpy(buffer, *h, len);
    buffer[len] = '\0';

    ReleaseResource(h);
    if (ResError() != noErr) goto out;
    return buffer;

  out:
    return NULL;
}

int read_setting_i(void *handle, char const *key, int defvalue) {
    int fd;
    Handle h;
    int value;

    if (handle == NULL) goto out;
    fd = *(int *)handle;
    UseResFile(fd);
    if (ResError() != noErr) goto out;
    h = get1namedresource(FOUR_CHAR_CODE('Int '), key);
    if (h == NULL) goto out;
    value = *(int *)*h;
    ReleaseResource(h);
    if (ResError() != noErr) goto out;
    return value;

  out:
    return defvalue;
}

void close_settings_r(void *handle) {
    int fd;

    if (handle == NULL) return;
    fd = *(int *)handle;
    CloseResFile(fd);
    if (ResError() != noErr)
	fatalbox("Close of saved session failed (%d)", ResError());
    safefree(handle);
}

void del_settings(char const *sessionname) {
    OSErr error;
    FSSpec sessfile;
    short sessVRefNum;
    long sessDirID;
    Str255 psessionname;

    error = get_session_dir(kDontCreateFolder, &sessVRefNum, &sessDirID);

    c2pstrcpy(psessionname, sessionname);
    error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &sessfile);
    if (error != noErr) goto out;

    error = FSpDelete(&sessfile);
    return;
  out:
    fatalbox("Delete session failed (%d)", error);
}

struct enum_settings_state {
    short vRefNum;
    long dirID;
    int index;
};

void *enum_settings_start(void) {
    OSErr error;
    struct enum_settings_state *state;

    state = safemalloc(sizeof(*state));
    error = get_session_dir(kDontCreateFolder, &state->vRefNum, &state->dirID);
    if (error != noErr) {
	safefree(state);
	return NULL;
    }
    state->index = 1;
    return state;
}

char *enum_settings_next(void *handle, char *buffer, int buflen) {
    struct enum_settings_state *e = handle;
    CInfoPBRec pb;
    OSErr error = noErr;
    Str255 name;

    if (e == NULL) return NULL;
    do {
	pb.hFileInfo.ioNamePtr = name;
	pb.hFileInfo.ioVRefNum = e->vRefNum;
	pb.hFileInfo.ioDirID = e->dirID;
	pb.hFileInfo.ioFDirIndex = e->index++;
	error = PBGetCatInfoSync(&pb);
	if (error != noErr) return NULL;
    } while (!((pb.hFileInfo.ioFlAttrib & ioDirMask) == 0 &&
	       pb.hFileInfo.ioFlFndrInfo.fdCreator == PUTTY_CREATOR &&
	       pb.hFileInfo.ioFlFndrInfo.fdType == SESS_TYPE &&
	       name[0] < buflen));

    p2cstrcpy(buffer, name);
    return buffer;
}

void enum_settings_finish(void *handle) {

    safefree(handle);
}

#define SEED_SIZE 512

void read_random_seed(noise_consumer_t consumer)
{
    short puttyVRefNum;
    long puttyDirID;
    OSErr error;
    char buf[SEED_SIZE];
    short refnum;
    long count = SEED_SIZE;

    if (get_putty_dir(kDontCreateFolder, &puttyVRefNum, &puttyDirID) != noErr)
	return;
    if (HOpenDF(puttyVRefNum, puttyDirID, "\pPuTTY Random Seed", fsRdPerm,
		&refnum) != noErr)
	return;
    error = FSRead(refnum, &count, buf);
    if (error != noErr && error != eofErr)
	return;
    (*consumer)(buf, count);
    FSClose(refnum);
}

/*
 * We don't bother with the usual FSpExchangeFiles dance here because
 * it doesn't really matter if the old random seed gets lost.
 */
void write_random_seed(void *data, int len)
{
    short puttyVRefNum;
    long puttyDirID;
    OSErr error;
    FSSpec dstfile;
    short refnum;
    long count = len;

    if (get_putty_dir(kCreateFolder, &puttyVRefNum, &puttyDirID) != noErr)
	return;

    error = FSMakeFSSpec(puttyVRefNum, puttyDirID, "\pPuTTY Random Seed",
			 &dstfile);
    if (error == fnfErr)
	error = FSpCreate(&dstfile, PUTTY_CREATOR, SEED_TYPE, smRoman);
    if (error != noErr) return;

    if (FSpOpenDF(&dstfile, fsWrPerm, &refnum) != noErr) return;

    FSWrite(refnum, &count, data);

    FSClose(refnum);
    return;
}

/*
 * Emacs magic:
 * Local Variables:
 * c-file-style: "simon"
 * End:
 */
Commit	Line	Data
604379f1	1	/* $Id: macstore.c,v 1.9 2003/01/18 12:03:28 ben Exp $ */
d082ac49	2
	3	/*
	4	* macstore.c: Macintosh-specific impementation of the interface
	5	* defined in storage.h
	6	*/
	7
	8	#include <MacTypes.h>
	9	#include <Folders.h>
	10	#include <Memory.h>
	11	#include <Resources.h>
	12	#include <TextUtils.h>
	13
	14	#include <string.h>
	15
	16	#include "putty.h"
	17	#include "storage.h"
ce283213	18	#include "mac.h"
d082ac49	19
	20	#define PUTTY_CREATOR FOUR_CHAR_CODE('pTTY')
	21	#define SESS_TYPE FOUR_CHAR_CODE('Sess')
0c4b7799	22	#define SEED_TYPE FOUR_CHAR_CODE('Seed')
d082ac49	23
d082ac49	24
d082ac49	25	OSErr FSpGetDirID(FSSpec f, long idp, Boolean makeit);
	26
	27	/*
	28	* We store each session as a file in the "PuTTY" sub-directory of the
	29	* preferences folder. Each (key,value) pair is stored as a resource.
	30	*/
	31
0c4b7799	32	OSErr get_putty_dir(Boolean makeit, short pVRefNum, long pDirID)
0c4b7799	33	{
d082ac49	34	OSErr error = noErr;
d082ac49	35	short prefVRefNum;
0c4b7799	36	FSSpec puttydir;
0c4b7799	37	long prefDirID, puttyDirID;
d082ac49	38
	39	error = FindFolder(kOnSystemDisk, kPreferencesFolderType, makeit,
	40	&prefVRefNum, &prefDirID);
	41	if (error != noErr) goto out;
	42
	43	error = FSMakeFSSpec(prefVRefNum, prefDirID, "\pPuTTY", &puttydir);
	44	if (error != noErr && error != fnfErr) goto out;
	45	error = FSpGetDirID(&puttydir, &puttyDirID, makeit);
	46	if (error != noErr) goto out;
	47
0c4b7799	48	*pVRefNum = prefVRefNum;
	49	*pDirID = puttyDirID;
	50
	51	out:
	52	return error;
	53	}
	54
	55	OSErr get_session_dir(Boolean makeit, short pVRefNum, long pDirID) {
	56	OSErr error = noErr;
	57	short puttyVRefNum;
	58	FSSpec sessdir;
	59	long puttyDirID, sessDirID;
	60
	61	error = get_putty_dir(makeit, &puttyVRefNum, &puttyDirID);
	62	if (error != noErr) goto out;
	63	error = FSMakeFSSpec(puttyVRefNum, puttyDirID, "\pSaved Sessions",
d082ac49	64	&sessdir);
	65	if (error != noErr && error != fnfErr) goto out;
	66	error = FSpGetDirID(&sessdir, &sessDirID, makeit);
	67	if (error != noErr) goto out;
	68
0c4b7799	69	*pVRefNum = puttyVRefNum;
d082ac49	70	*pDirID = sessDirID;
	71
	72	out:
	73	return error;
	74	}
	75
	76	OSErr FSpGetDirID(FSSpec f, long idp, Boolean makeit) {
	77	CInfoPBRec pb;
	78	OSErr error = noErr;
	79
	80	pb.dirInfo.ioNamePtr = f->name;
	81	pb.dirInfo.ioVRefNum = f->vRefNum;
	82	pb.dirInfo.ioDrDirID = f->parID;
	83	pb.dirInfo.ioFDirIndex = 0;
	84	error = PBGetCatInfoSync(&pb);
	85	if (error == fnfErr && makeit)
	86	return FSpDirCreate(f, smSystemScript, idp);
	87	if (error != noErr) goto out;
	88	if ((pb.dirInfo.ioFlAttrib & ioDirMask) == 0) {
	89	error = dirNFErr;
	90	goto out;
	91	}
	92	*idp = pb.dirInfo.ioDrDirID;
	93
	94	out:
	95	return error;
	96	}
	97
	98	struct write_settings {
	99	int fd;
	100	FSSpec tmpfile;
	101	FSSpec dstfile;
	102	};
	103
f5d2d791	104	void open_settings_w(char const sessionname) {
d082ac49	105	short sessVRefNum, tmpVRefNum;
d082ac49	106	long sessDirID, tmpDirID;
d082ac49	107	OSErr error;
	108	Str255 psessionname;
	109	struct write_settings *ws;
	110
	111	ws = safemalloc(sizeof *ws);
	112	error = get_session_dir(kCreateFolder, &sessVRefNum, &sessDirID);
	113	if (error != noErr) goto out;
	114
	115	c2pstrcpy(psessionname, sessionname);
	116	error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &ws->dstfile);
	117	if (error != noErr && error != fnfErr) goto out;
	118	if (error == fnfErr) {
	119	FSpCreateResFile(&ws->dstfile, PUTTY_CREATOR, SESS_TYPE,
	120	smSystemScript);
	121	if ((error = ResError()) != noErr) goto out;
	122	}
	123
	124	/* Create a temporary file to save to first. */
	125	error = FindFolder(sessVRefNum, kTemporaryFolderType, kCreateFolder,
	126	&tmpVRefNum, &tmpDirID);
	127	if (error != noErr) goto out;
	128	error = FSMakeFSSpec(tmpVRefNum, tmpDirID, psessionname, &ws->tmpfile);
	129	if (error != noErr && error != fnfErr) goto out;
	130	if (error == noErr) {
	131	error = FSpDelete(&ws->tmpfile);
	132	if (error != noErr) goto out;
	133	}
	134	FSpCreateResFile(&ws->tmpfile, PUTTY_CREATOR, SESS_TYPE, smSystemScript);
	135	if ((error = ResError()) != noErr) goto out;
	136
	137	ws->fd = FSpOpenResFile(&ws->tmpfile, fsWrPerm);
	138	if (ws->fd == -1) {error = ResError(); goto out;}
	139
	140	return ws;
	141
	142	out:
	143	safefree(ws);
	144	fatalbox("Failed to open session for write (%d)", error);
	145	}
	146
f5d2d791	147	void write_setting_s(void handle, char const key, char const *value) {
d082ac49	148	int fd = (int )handle;
	149	Handle h;
	150	int id;
803efcdf	151	OSErr error;
d082ac49	152
	153	UseResFile(fd);
	154	if (ResError() != noErr)
	155	fatalbox("Failed to open saved session (%d)", ResError());
	156
	157	error = PtrToHand(value, &h, strlen(value));
	158	if (error != noErr)
	159	fatalbox("Failed to allocate memory");
	160	/* Put the data in a resource. */
	161	id = Unique1ID(FOUR_CHAR_CODE('TEXT'));
	162	if (ResError() != noErr)
	163	fatalbox("Failed to get ID for resource %s (%d)", key, ResError());
	164	addresource(h, FOUR_CHAR_CODE('TEXT'), id, key);
	165	if (ResError() != noErr)
	166	fatalbox("Failed to add resource %s (%d)", key, ResError());
	167	}
	168
f5d2d791	169	void write_setting_i(void handle, char const key, int value) {
d082ac49	170	int fd = (int )handle;
	171	Handle h;
	172	int id;
	173	OSErr error;
	174
	175	UseResFile(fd);
	176	if (ResError() != noErr)
	177	fatalbox("Failed to open saved session (%d)", ResError());
	178
	179	/* XXX assume all systems have the same "int" format */
	180	error = PtrToHand(&value, &h, sizeof(int));
	181	if (error != noErr)
	182	fatalbox("Failed to allocate memory (%d)", error);
	183
	184	/* Put the data in a resource. */
	185	id = Unique1ID(FOUR_CHAR_CODE('Int '));
	186	if (ResError() != noErr)
	187	fatalbox("Failed to get ID for resource %s (%d)", key, ResError());
	188	addresource(h, FOUR_CHAR_CODE('Int '), id, key);
	189	if (ResError() != noErr)
	190	fatalbox("Failed to add resource %s (%d)", key, ResError());
	191	}
	192
	193	void close_settings_w(void *handle) {
	194	struct write_settings *ws = handle;
	195	OSErr error;
	196
	197	CloseResFile(ws->fd);
	198	if ((error = ResError()) != noErr)
	199	goto out;
	200	error = FSpExchangeFiles(&ws->tmpfile, &ws->dstfile);
	201	if (error != noErr) goto out;
	202	error = FSpDelete(&ws->tmpfile);
	203	if (error != noErr) goto out;
	204	return;
	205
	206	out:
	207	fatalbox("Close of saved session failed (%d)", error);
	208	safefree(handle);
	209	}
	210
f5d2d791	211	void open_settings_r(char const sessionname)
ce283213	212	{
d082ac49	213	short sessVRefNum;
	214	long sessDirID;
	215	FSSpec sessfile;
	216	OSErr error;
	217	Str255 psessionname;
d082ac49	218
	219	error = get_session_dir(kDontCreateFolder, &sessVRefNum, &sessDirID);
	220
	221	c2pstrcpy(psessionname, sessionname);
	222	error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &sessfile);
	223	if (error != noErr) goto out;
ce283213	224	return open_settings_r_fsp(&sessfile);
	225
	226	out:
	227	return NULL;
	228	}
	229
	230	void open_settings_r_fsp(FSSpec sessfile)
	231	{
	232	OSErr error;
	233	int fd;
	234	int *handle;
	235
	236	fd = FSpOpenResFile(sessfile, fsRdPerm);
d082ac49	237	if (fd == 0) {error = ResError(); goto out;}
	238
	239	handle = safemalloc(sizeof *handle);
	240	*handle = fd;
	241	return handle;
	242
	243	out:
	244	return NULL;
	245	}
	246
f5d2d791	247	char read_setting_s(void handle, char const key, char buffer, int buflen) {
d082ac49	248	int fd;
d082ac49	249	Handle h;
086efcde	250	size_t len;
d082ac49	251
	252	if (handle == NULL) goto out;
	253	fd = (int )handle;
	254	UseResFile(fd);
	255	if (ResError() != noErr) goto out;
	256	h = get1namedresource(FOUR_CHAR_CODE('TEXT'), key);
	257	if (h == NULL) goto out;
	258
086efcde	259	len = GetHandleSize(h);
	260	if (len + 1 > buflen) goto out;
	261	memcpy(buffer, *h, len);
	262	buffer[len] = '\0';
	263
d082ac49	264	ReleaseResource(h);
	265	if (ResError() != noErr) goto out;
	266	return buffer;
	267
	268	out:
	269	return NULL;
	270	}
	271
f5d2d791	272	int read_setting_i(void handle, char const key, int defvalue) {
d082ac49	273	int fd;
d082ac49	274	Handle h;
d082ac49	275	int value;
	276
	277	if (handle == NULL) goto out;
	278	fd = (int )handle;
	279	UseResFile(fd);
	280	if (ResError() != noErr) goto out;
	281	h = get1namedresource(FOUR_CHAR_CODE('Int '), key);
	282	if (h == NULL) goto out;
	283	value = (int )*h;
	284	ReleaseResource(h);
	285	if (ResError() != noErr) goto out;
	286	return value;
	287
	288	out:
	289	return defvalue;
	290	}
	291
	292	void close_settings_r(void *handle) {
	293	int fd;
	294
	295	if (handle == NULL) return;
	296	fd = (int )handle;
	297	CloseResFile(fd);
	298	if (ResError() != noErr)
	299	fatalbox("Close of saved session failed (%d)", ResError());
	300	safefree(handle);
	301	}
	302
f5d2d791	303	void del_settings(char const *sessionname) {
d082ac49	304	OSErr error;
	305	FSSpec sessfile;
	306	short sessVRefNum;
	307	long sessDirID;
	308	Str255 psessionname;
	309
	310	error = get_session_dir(kDontCreateFolder, &sessVRefNum, &sessDirID);
	311
	312	c2pstrcpy(psessionname, sessionname);
	313	error = FSMakeFSSpec(sessVRefNum, sessDirID, psessionname, &sessfile);
	314	if (error != noErr) goto out;
	315
	316	error = FSpDelete(&sessfile);
	317	return;
	318	out:
	319	fatalbox("Delete session failed (%d)", error);
	320	}
	321
	322	struct enum_settings_state {
	323	short vRefNum;
	324	long dirID;
	325	int index;
	326	};
	327
	328	void *enum_settings_start(void) {
	329	OSErr error;
	330	struct enum_settings_state *state;
	331
	332	state = safemalloc(sizeof(*state));
	333	error = get_session_dir(kDontCreateFolder, &state->vRefNum, &state->dirID);
	334	if (error != noErr) {
	335	safefree(state);
	336	return NULL;
	337	}
	338	state->index = 1;
	339	return state;
	340	}
	341
	342	char enum_settings_next(void handle, char *buffer, int buflen) {
	343	struct enum_settings_state *e = handle;
	344	CInfoPBRec pb;
	345	OSErr error = noErr;
	346	Str255 name;
	347
	348	if (e == NULL) return NULL;
	349	do {
	350	pb.hFileInfo.ioNamePtr = name;
	351	pb.hFileInfo.ioVRefNum = e->vRefNum;
	352	pb.hFileInfo.ioDirID = e->dirID;
	353	pb.hFileInfo.ioFDirIndex = e->index++;
	354	error = PBGetCatInfoSync(&pb);
	355	if (error != noErr) return NULL;
	356	} while (!((pb.hFileInfo.ioFlAttrib & ioDirMask) == 0 &&
	357	pb.hFileInfo.ioFlFndrInfo.fdCreator == PUTTY_CREATOR &&
	358	pb.hFileInfo.ioFlFndrInfo.fdType == SESS_TYPE &&
	359	name[0] < buflen));
	360
	361	p2cstrcpy(buffer, name);
	362	return buffer;
	363	}
	364
	365	void enum_settings_finish(void *handle) {
	366
	367	safefree(handle);
368	}
369
0c4b7799	370	#define SEED_SIZE 512
	371
	372	void read_random_seed(noise_consumer_t consumer)
	373	{
	374	short puttyVRefNum;
	375	long puttyDirID;
	376	OSErr error;
	377	char buf[SEED_SIZE];
	378	short refnum;
	379	long count = SEED_SIZE;
	380
	381	if (get_putty_dir(kDontCreateFolder, &puttyVRefNum, &puttyDirID) != noErr)
	382	return;
	383	if (HOpenDF(puttyVRefNum, puttyDirID, "\pPuTTY Random Seed", fsRdPerm,
	384	&refnum) != noErr)
	385	return;
	386	error = FSRead(refnum, &count, buf);
	387	if (error != noErr && error != eofErr)
	388	return;
	389	(*consumer)(buf, count);
	390	FSClose(refnum);
	391	}
	392
604379f1	393	/*
	394	* We don't bother with the usual FSpExchangeFiles dance here because
	395	* it doesn't really matter if the old random seed gets lost.
	396	*/
0c4b7799	397	void write_random_seed(void *data, int len)
0c4b7799	398	{
604379f1	399	short puttyVRefNum;
604379f1	400	long puttyDirID;
0c4b7799	401	OSErr error;
604379f1	402	FSSpec dstfile;
0c4b7799	403	short refnum;
	404	long count = len;
	405
	406	if (get_putty_dir(kCreateFolder, &puttyVRefNum, &puttyDirID) != noErr)
	407	return;
	408
	409	error = FSMakeFSSpec(puttyVRefNum, puttyDirID, "\pPuTTY Random Seed",
	410	&dstfile);
604379f1	411	if (error == fnfErr)
604379f1	412	error = FSpCreate(&dstfile, PUTTY_CREATOR, SEED_TYPE, smRoman);
0c4b7799	413	if (error != noErr) return;
0c4b7799	414
604379f1	415	if (FSpOpenDF(&dstfile, fsWrPerm, &refnum) != noErr) return;
0c4b7799	416
604379f1	417	FSWrite(refnum, &count, data);
0c4b7799	418
0c4b7799	419	FSClose(refnum);
604379f1	420	return;
0c4b7799	421	}
d082ac49	422
	423	/*
	424	* Emacs magic:
	425	* Local Variables:
	426	* c-file-style: "simon"
	427	* End:
	428	*/