[sgt/putty] / windows / winsftp.c

/*
 * winsftp.c: the Windows-specific parts of PSFTP and PSCP.
 */

#include <assert.h>

#include "putty.h"
#include "psftp.h"
#include "int64.h"

char *get_ttymode(void *frontend, const char *mode) { return NULL; }

int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
{
    int ret;
    ret = cmdline_get_passwd_input(p, in, inlen);
    if (ret == -1)
	ret = console_get_userpass_input(p, in, inlen);
    return ret;
}

/* ----------------------------------------------------------------------
 * File access abstraction.
 */

/*
 * Set local current directory. Returns NULL on success, or else an
 * error message which must be freed after printing.
 */
char *psftp_lcd(char *dir)
{
    char *ret = NULL;

    if (!SetCurrentDirectory(dir)) {
	LPVOID message;
	int i;
	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
		      FORMAT_MESSAGE_FROM_SYSTEM |
		      FORMAT_MESSAGE_IGNORE_INSERTS,
		      NULL, GetLastError(),
		      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
		      (LPTSTR)&message, 0, NULL);
	i = strcspn((char *)message, "\n");
	ret = dupprintf("%.*s", i, (LPCTSTR)message);
	LocalFree(message);
    }

    return ret;
}

/*
 * Get local current directory. Returns a string which must be
 * freed.
 */
char *psftp_getcwd(void)
{
    char *ret = snewn(256, char);
    int len = GetCurrentDirectory(256, ret);
    if (len > 256)
	ret = sresize(ret, len, char);
    GetCurrentDirectory(len, ret);
    return ret;
}

#define TIME_POSIX_TO_WIN(t, ft) (*(LONGLONG*)&(ft) = \
	((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000)
#define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \
	((*(LONGLONG*)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600))

struct RFile {
    HANDLE h;
};

RFile *open_existing_file(char *name, uint64 *size,
			  unsigned long *mtime, unsigned long *atime)
{
    HANDLE h;
    RFile *ret;

    h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL,
		   OPEN_EXISTING, 0, 0);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(RFile);
    ret->h = h;

    if (size)
        size->lo=GetFileSize(h, &(size->hi));

    if (mtime || atime) {
	FILETIME actime, wrtime;
	GetFileTime(h, NULL, &actime, &wrtime);
	if (atime)
	    TIME_WIN_TO_POSIX(actime, *atime);
	if (mtime)
	    TIME_WIN_TO_POSIX(wrtime, *mtime);
    }

    return ret;
}

int read_from_file(RFile *f, void *buffer, int length)
{
    int ret, read;
    ret = ReadFile(f->h, buffer, length, &read, NULL);
    if (!ret)
	return -1;		       /* error */
    else
	return read;
}

void close_rfile(RFile *f)
{
    CloseHandle(f->h);
    sfree(f);
}

struct WFile {
    HANDLE h;
};

WFile *open_new_file(char *name)
{
    HANDLE h;
    WFile *ret;

    h = CreateFile(name, GENERIC_WRITE, 0, NULL,
		   CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(WFile);
    ret->h = h;

    return ret;
}

WFile *open_existing_wfile(char *name, uint64 *size)
{
    HANDLE h;
    WFile *ret;

    h = CreateFile(name, GENERIC_WRITE, FILE_SHARE_READ, NULL,
		   OPEN_EXISTING, 0, 0);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(WFile);
    ret->h = h;

    if (size)
	size->lo=GetFileSize(h, &(size->hi));

    return ret;
}

int write_to_file(WFile *f, void *buffer, int length)
{
    int ret, written;
    ret = WriteFile(f->h, buffer, length, &written, NULL);
    if (!ret)
	return -1;		       /* error */
    else
	return written;
}

void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
{
    FILETIME actime, wrtime;
    TIME_POSIX_TO_WIN(atime, actime);
    TIME_POSIX_TO_WIN(mtime, wrtime);
    SetFileTime(f->h, NULL, &actime, &wrtime);
}

void close_wfile(WFile *f)
{
    CloseHandle(f->h);
    sfree(f);
}

/* Seek offset bytes through file, from whence, where whence is
   FROM_START, FROM_CURRENT, or FROM_END */
int seek_file(WFile *f, uint64 offset, int whence)
{
    DWORD movemethod;

    switch (whence) {
    case FROM_START:
	movemethod = FILE_BEGIN;
	break;
    case FROM_CURRENT:
	movemethod = FILE_CURRENT;
	break;
    case FROM_END:
	movemethod = FILE_END;
	break;
    default:
	return -1;
    }

    SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod);
    
    if (GetLastError() != NO_ERROR)
	return -1;
    else 
	return 0;
}

uint64 get_file_posn(WFile *f)
{
    uint64 ret;

    ret.hi = 0L;
    ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT);

    return ret;
}

int file_type(char *name)
{
    DWORD attr;
    attr = GetFileAttributes(name);
    /* We know of no `weird' files under Windows. */
    if (attr == (DWORD)-1)
	return FILE_TYPE_NONEXISTENT;
    else if (attr & FILE_ATTRIBUTE_DIRECTORY)
	return FILE_TYPE_DIRECTORY;
    else
	return FILE_TYPE_FILE;
}

struct DirHandle {
    HANDLE h;
    char *name;
};

DirHandle *open_directory(char *name)
{
    HANDLE h;
    WIN32_FIND_DATA fdat;
    char *findfile;
    DirHandle *ret;

    /* Enumerate files in dir `foo'. */
    findfile = dupcat(name, "/*", NULL);
    h = FindFirstFile(findfile, &fdat);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;
    sfree(findfile);

    ret = snew(DirHandle);
    ret->h = h;
    ret->name = dupstr(fdat.cFileName);
    return ret;
}

char *read_filename(DirHandle *dir)
{
    do {

	if (!dir->name) {
	    WIN32_FIND_DATA fdat;
	    int ok = FindNextFile(dir->h, &fdat);
	    if (!ok)
		return NULL;
	    else
		dir->name = dupstr(fdat.cFileName);
	}

	assert(dir->name);
	if (dir->name[0] == '.' &&
	    (dir->name[1] == '\0' ||
	     (dir->name[1] == '.' && dir->name[2] == '\0'))) {
	    sfree(dir->name);
	    dir->name = NULL;
	}

    } while (!dir->name);

    if (dir->name) {
	char *ret = dir->name;
	dir->name = NULL;
	return ret;
    } else
	return NULL;
}

void close_directory(DirHandle *dir)
{
    FindClose(dir->h);
    if (dir->name)
	sfree(dir->name);
    sfree(dir);
}

int test_wildcard(char *name, int cmdline)
{
    HANDLE fh;
    WIN32_FIND_DATA fdat;

    /* First see if the exact name exists. */
    if (GetFileAttributes(name) != (DWORD)-1)
	return WCTYPE_FILENAME;

    /* Otherwise see if a wildcard match finds anything. */
    fh = FindFirstFile(name, &fdat);
    if (fh == INVALID_HANDLE_VALUE)
	return WCTYPE_NONEXISTENT;

    FindClose(fh);
    return WCTYPE_WILDCARD;
}

struct WildcardMatcher {
    HANDLE h;
    char *name;
    char *srcpath;
};

/*
 * Return a pointer to the portion of str that comes after the last
 * slash (or backslash or colon, if `local' is TRUE).
 */
static char *stripslashes(char *str, int local)
{
    char *p;

    if (local) {
        p = strchr(str, ':');
        if (p) str = p+1;
    }

    p = strrchr(str, '/');
    if (p) str = p+1;

    if (local) {
	p = strrchr(str, '\\');
	if (p) str = p+1;
    }

    return str;
}

WildcardMatcher *begin_wildcard_matching(char *name)
{
    HANDLE h;
    WIN32_FIND_DATA fdat;
    WildcardMatcher *ret;
    char *last;

    h = FindFirstFile(name, &fdat);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(WildcardMatcher);
    ret->h = h;
    ret->srcpath = dupstr(name);
    last = stripslashes(ret->srcpath, 1);
    *last = '\0';
    if (fdat.cFileName[0] == '.' &&
	(fdat.cFileName[1] == '\0' ||
	 (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
	ret->name = NULL;
    else
	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);

    return ret;
}

char *wildcard_get_filename(WildcardMatcher *dir)
{
    while (!dir->name) {
	WIN32_FIND_DATA fdat;
	int ok = FindNextFile(dir->h, &fdat);

	if (!ok)
	    return NULL;

	if (fdat.cFileName[0] == '.' &&
	    (fdat.cFileName[1] == '\0' ||
	     (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
	    dir->name = NULL;
	else
	    dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
    }

    if (dir->name) {
	char *ret = dir->name;
	dir->name = NULL;
	return ret;
    } else
	return NULL;
}

void finish_wildcard_matching(WildcardMatcher *dir)
{
    FindClose(dir->h);
    if (dir->name)
	sfree(dir->name);
    sfree(dir->srcpath);
    sfree(dir);
}

int vet_filename(char *name)
{
    if (strchr(name, '/') || strchr(name, '\\') || strchr(name, ':'))
	return FALSE;

    if (!name[strspn(name, ".")])      /* entirely composed of dots */
	return FALSE;

    return TRUE;
}

int create_directory(char *name)
{
    return CreateDirectory(name, NULL) != 0;
}

char *dir_file_cat(char *dir, char *file)
{
    return dupcat(dir, "\\", file, NULL);
}

/* ----------------------------------------------------------------------
 * Platform-specific network handling.
 */

/*
 * Be told what socket we're supposed to be using.
 */
static SOCKET sftp_ssh_socket = INVALID_SOCKET;
static HANDLE netevent = NULL;
char *do_select(SOCKET skt, int startup)
{
    int events;
    if (startup)
	sftp_ssh_socket = skt;
    else
	sftp_ssh_socket = INVALID_SOCKET;

    if (p_WSAEventSelect) {
	if (startup) {
	    events = (FD_CONNECT | FD_READ | FD_WRITE |
		      FD_OOB | FD_CLOSE | FD_ACCEPT);
	    netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	} else {
	    events = 0;
	}
	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	    switch (p_WSAGetLastError()) {
	      case WSAENETDOWN:
		return "Network is down";
	      default:
		return "WSAEventSelect(): unknown error";
	    }
	}
    }
    return NULL;
}
extern int select_result(WPARAM, LPARAM);

int do_eventsel_loop(HANDLE other_event)
{
    int n;
    long next, ticks;
    HANDLE handles[2];
    SOCKET *sklist;
    int skcount;
    long now = GETTICKCOUNT();

    if (!netevent) {
	return -1;		       /* doom */
    }

    handles[0] = netevent;
    handles[1] = other_event;

    if (run_timers(now, &next)) {
	ticks = next - GETTICKCOUNT();
	if (ticks < 0) ticks = 0;  /* just in case */
    } else {
	ticks = INFINITE;
    }

    n = MsgWaitForMultipleObjects(other_event ? 2 : 1, handles, FALSE, ticks,
				  QS_POSTMESSAGE);

    if (n == WAIT_OBJECT_0 + 0) {
	WSANETWORKEVENTS things;
	SOCKET socket;
	extern SOCKET first_socket(int *), next_socket(int *);
	extern int select_result(WPARAM, LPARAM);
	int i, socketstate;

	/*
	 * We must not call select_result() for any socket
	 * until we have finished enumerating within the
	 * tree. This is because select_result() may close
	 * the socket and modify the tree.
	 */
	/* Count the active sockets. */
	i = 0;
	for (socket = first_socket(&socketstate);
	     socket != INVALID_SOCKET;
	     socket = next_socket(&socketstate)) i++;

	/* Expand the buffer if necessary. */
	sklist = snewn(i, SOCKET);

	/* Retrieve the sockets into sklist. */
	skcount = 0;
	for (socket = first_socket(&socketstate);
	     socket != INVALID_SOCKET;
	     socket = next_socket(&socketstate)) {
	    sklist[skcount++] = socket;
	}

	/* Now we're done enumerating; go through the list. */
	for (i = 0; i < skcount; i++) {
	    WPARAM wp;
	    socket = sklist[i];
	    wp = (WPARAM) socket;
	    if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
		static const struct { int bit, mask; } eventtypes[] = {
		    {FD_CONNECT_BIT, FD_CONNECT},
		    {FD_READ_BIT, FD_READ},
		    {FD_CLOSE_BIT, FD_CLOSE},
		    {FD_OOB_BIT, FD_OOB},
		    {FD_WRITE_BIT, FD_WRITE},
		    {FD_ACCEPT_BIT, FD_ACCEPT},
		};
		int e;

		noise_ultralight(socket);
		noise_ultralight(things.lNetworkEvents);

		for (e = 0; e < lenof(eventtypes); e++)
		    if (things.lNetworkEvents & eventtypes[e].mask) {
			LPARAM lp;
			int err = things.iErrorCode[eventtypes[e].bit];
			lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
			select_result(wp, lp);
		    }
	    }
	}

	sfree(sklist);
    }

    if (n == WAIT_TIMEOUT) {
	now = next;
    } else {
	now = GETTICKCOUNT();
    }

    if (other_event && n == WAIT_OBJECT_0 + 1)
	return 1;

    return 0;
}

/*
 * Wait for some network data and process it.
 *
 * We have two variants of this function. One uses select() so that
 * it's compatible with WinSock 1. The other uses WSAEventSelect
 * and MsgWaitForMultipleObjects, so that we can consistently use
 * WSAEventSelect throughout; this enables us to also implement
 * ssh_sftp_get_cmdline() using a parallel mechanism.
 */
int ssh_sftp_loop_iteration(void)
{
    if (sftp_ssh_socket == INVALID_SOCKET)
	return -1;		       /* doom */

    if (p_WSAEventSelect == NULL) {
	fd_set readfds;
	int ret;
	long now = GETTICKCOUNT();

	if (socket_writable(sftp_ssh_socket))
	    select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);

	do {
	    long next, ticks;
	    struct timeval tv, *ptv;

	    if (run_timers(now, &next)) {
		ticks = next - GETTICKCOUNT();
		if (ticks <= 0)
		    ticks = 1;	       /* just in case */
		tv.tv_sec = ticks / 1000;
		tv.tv_usec = ticks % 1000 * 1000;
		ptv = &tv;
	    } else {
		ptv = NULL;
	    }

	    FD_ZERO(&readfds);
	    FD_SET(sftp_ssh_socket, &readfds);
	    ret = p_select(1, &readfds, NULL, NULL, ptv);

	    if (ret < 0)
		return -1;		       /* doom */
	    else if (ret == 0)
		now = next;
	    else
		now = GETTICKCOUNT();

	} while (ret == 0);

	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);

	return 0;
    } else {
	return do_eventsel_loop(NULL);
    }
}

/*
 * Read a command line from standard input.
 * 
 * In the presence of WinSock 2, we can use WSAEventSelect to
 * mediate between the socket and stdin, meaning we can send
 * keepalives and respond to server events even while waiting at
 * the PSFTP command prompt. Without WS2, we fall back to a simple
 * fgets.
 */
struct command_read_ctx {
    HANDLE event;
    char *line;
};

static DWORD WINAPI command_read_thread(void *param)
{
    struct command_read_ctx *ctx = (struct command_read_ctx *) param;

    ctx->line = fgetline(stdin);

    SetEvent(ctx->event);

    return 0;
}

char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok)
{
    int ret;
    struct command_read_ctx actx, *ctx = &actx;
    DWORD threadid;

    fputs(prompt, stdout);
    fflush(stdout);

    if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) ||
	p_WSAEventSelect == NULL) {
	return fgetline(stdin);	       /* very simple */
    }

    /*
     * Create a second thread to read from stdin. Process network
     * and timing events until it terminates.
     */
    ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
    ctx->line = NULL;

    if (!CreateThread(NULL, 0, command_read_thread,
		      ctx, 0, &threadid)) {
	fprintf(stderr, "Unable to create command input thread\n");
	cleanup_exit(1);
    }

    do {
	ret = do_eventsel_loop(ctx->event);

	/* Error return can only occur if netevent==NULL, and it ain't. */
	assert(ret >= 0);
    } while (ret == 0);

    return ctx->line;
}

/* ----------------------------------------------------------------------
 * Main program. Parse arguments etc.
 */
int main(int argc, char *argv[])
{
    int ret;

    ret = psftp_main(argc, argv);

    return ret;
}
Commit	Line	Data
d6cc41e6	1	/*
799dfcfa	2	* winsftp.c: the Windows-specific parts of PSFTP and PSCP.
d6cc41e6	3	*/
d6cc41e6	4
39934deb	5	#include <assert.h>
39934deb	6
d6cc41e6	7	#include "putty.h"
d6cc41e6	8	#include "psftp.h"
0ac1920c	9	#include "int64.h"
c6ccd5c2	10
c6ccd5c2	11	char get_ttymode(void frontend, const char *mode) { return NULL; }
edd0cb8a	12
	13	int get_userpass_input(prompts_t p, unsigned char in, int inlen)
	14	{
	15	int ret;
	16	ret = cmdline_get_passwd_input(p, in, inlen);
	17	if (ret == -1)
	18	ret = console_get_userpass_input(p, in, inlen);
	19	return ret;
	20	}
d6cc41e6	21
799dfcfa	22	/* ----------------------------------------------------------------------
	23	* File access abstraction.
	24	*/
	25
d6cc41e6	26	/*
	27	* Set local current directory. Returns NULL on success, or else an
	28	* error message which must be freed after printing.
	29	*/
	30	char psftp_lcd(char dir)
	31	{
	32	char *ret = NULL;
	33
	34	if (!SetCurrentDirectory(dir)) {
	35	LPVOID message;
	36	int i;
	37	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \|
	38	FORMAT_MESSAGE_FROM_SYSTEM \|
	39	FORMAT_MESSAGE_IGNORE_INSERTS,
	40	NULL, GetLastError(),
	41	MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	42	(LPTSTR)&message, 0, NULL);
	43	i = strcspn((char *)message, "\n");
	44	ret = dupprintf("%.*s", i, (LPCTSTR)message);
	45	LocalFree(message);
	46	}
	47
	48	return ret;
	49	}
	50
	51	/*
	52	* Get local current directory. Returns a string which must be
	53	* freed.
	54	*/
	55	char *psftp_getcwd(void)
	56	{
	57	char *ret = snewn(256, char);
	58	int len = GetCurrentDirectory(256, ret);
	59	if (len > 256)
	60	ret = sresize(ret, len, char);
	61	GetCurrentDirectory(len, ret);
	62	return ret;
	63	}
	64
799dfcfa	65	#define TIME_POSIX_TO_WIN(t, ft) ((LONGLONG)&(ft) = \
	66	((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000)
	67	#define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \
	68	(((LONGLONG)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600))
	69
	70	struct RFile {
	71	HANDLE h;
	72	};
	73
0ac1920c	74	RFile open_existing_file(char name, uint64 *size,
799dfcfa	75	unsigned long mtime, unsigned long atime)
	76	{
	77	HANDLE h;
	78	RFile *ret;
	79
	80	h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL,
	81	OPEN_EXISTING, 0, 0);
	82	if (h == INVALID_HANDLE_VALUE)
	83	return NULL;
	84
	85	ret = snew(RFile);
	86	ret->h = h;
	87
	88	if (size)
0ac1920c	89	size->lo=GetFileSize(h, &(size->hi));
799dfcfa	90
	91	if (mtime \|\| atime) {
	92	FILETIME actime, wrtime;
	93	GetFileTime(h, NULL, &actime, &wrtime);
	94	if (atime)
	95	TIME_WIN_TO_POSIX(actime, *atime);
	96	if (mtime)
	97	TIME_WIN_TO_POSIX(wrtime, *mtime);
	98	}
	99
	100	return ret;
	101	}
	102
	103	int read_from_file(RFile f, void buffer, int length)
	104	{
	105	int ret, read;
	106	ret = ReadFile(f->h, buffer, length, &read, NULL);
	107	if (!ret)
	108	return -1; /* error */
	109	else
	110	return read;
	111	}
	112
	113	void close_rfile(RFile *f)
	114	{
	115	CloseHandle(f->h);
	116	sfree(f);
	117	}
	118
	119	struct WFile {
	120	HANDLE h;
	121	};
	122
	123	WFile open_new_file(char name)
	124	{
	125	HANDLE h;
	126	WFile *ret;
	127
	128	h = CreateFile(name, GENERIC_WRITE, 0, NULL,
	129	CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
	130	if (h == INVALID_HANDLE_VALUE)
	131	return NULL;
	132
	133	ret = snew(WFile);
	134	ret->h = h;
	135
	136	return ret;
	137	}
	138
0ac1920c	139	WFile open_existing_wfile(char name, uint64 *size)
	140	{
	141	HANDLE h;
	142	WFile *ret;
	143
	144	h = CreateFile(name, GENERIC_WRITE, FILE_SHARE_READ, NULL,
	145	OPEN_EXISTING, 0, 0);
	146	if (h == INVALID_HANDLE_VALUE)
	147	return NULL;
	148
	149	ret = snew(WFile);
	150	ret->h = h;
	151
	152	if (size)
	153	size->lo=GetFileSize(h, &(size->hi));
	154
	155	return ret;
	156	}
	157
799dfcfa	158	int write_to_file(WFile f, void buffer, int length)
	159	{
	160	int ret, written;
	161	ret = WriteFile(f->h, buffer, length, &written, NULL);
	162	if (!ret)
	163	return -1; /* error */
	164	else
	165	return written;
	166	}
	167
	168	void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
	169	{
	170	FILETIME actime, wrtime;
	171	TIME_POSIX_TO_WIN(atime, actime);
	172	TIME_POSIX_TO_WIN(mtime, wrtime);
	173	SetFileTime(f->h, NULL, &actime, &wrtime);
	174	}
	175
	176	void close_wfile(WFile *f)
	177	{
	178	CloseHandle(f->h);
	179	sfree(f);
	180	}
	181
0ac1920c	182	/* Seek offset bytes through file, from whence, where whence is
	183	FROM_START, FROM_CURRENT, or FROM_END */
	184	int seek_file(WFile *f, uint64 offset, int whence)
	185	{
	186	DWORD movemethod;
	187
	188	switch (whence) {
	189	case FROM_START:
	190	movemethod = FILE_BEGIN;
	191	break;
	192	case FROM_CURRENT:
	193	movemethod = FILE_CURRENT;
	194	break;
	195	case FROM_END:
	196	movemethod = FILE_END;
	197	break;
	198	default:
	199	return -1;
	200	}
	201
	202	SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod);
	203
	204	if (GetLastError() != NO_ERROR)
	205	return -1;
	206	else
	207	return 0;
	208	}
	209
	210	uint64 get_file_posn(WFile *f)
	211	{
	212	uint64 ret;
	213
	214	ret.hi = 0L;
	215	ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT);
	216
	217	return ret;
	218	}
	219
799dfcfa	220	int file_type(char *name)
	221	{
	222	DWORD attr;
	223	attr = GetFileAttributes(name);
	224	/* We know of no `weird' files under Windows. */
	225	if (attr == (DWORD)-1)
	226	return FILE_TYPE_NONEXISTENT;
	227	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
	228	return FILE_TYPE_DIRECTORY;
	229	else
	230	return FILE_TYPE_FILE;
	231	}
	232
	233	struct DirHandle {
	234	HANDLE h;
	235	char *name;
	236	};
	237
	238	DirHandle open_directory(char name)
	239	{
	240	HANDLE h;
	241	WIN32_FIND_DATA fdat;
	242	char *findfile;
	243	DirHandle *ret;
	244
8f0ebed4	245	/* Enumerate files in dir `foo'. */
799dfcfa	246	findfile = dupcat(name, "/*", NULL);
	247	h = FindFirstFile(findfile, &fdat);
	248	if (h == INVALID_HANDLE_VALUE)
	249	return NULL;
8c7d710c	250	sfree(findfile);
799dfcfa	251
	252	ret = snew(DirHandle);
	253	ret->h = h;
	254	ret->name = dupstr(fdat.cFileName);
	255	return ret;
	256	}
	257
	258	char read_filename(DirHandle dir)
	259	{
b0e15bb5	260	do {
	261
	262	if (!dir->name) {
	263	WIN32_FIND_DATA fdat;
	264	int ok = FindNextFile(dir->h, &fdat);
	265	if (!ok)
	266	return NULL;
	267	else
	268	dir->name = dupstr(fdat.cFileName);
	269	}
	270
	271	assert(dir->name);
	272	if (dir->name[0] == '.' &&
	273	(dir->name[1] == '\0' \|\|
	274	(dir->name[1] == '.' && dir->name[2] == '\0'))) {
	275	sfree(dir->name);
8c7d710c	276	dir->name = NULL;
b0e15bb5	277	}
	278
	279	} while (!dir->name);
799dfcfa	280
	281	if (dir->name) {
	282	char *ret = dir->name;
	283	dir->name = NULL;
	284	return ret;
	285	} else
	286	return NULL;
	287	}
	288
	289	void close_directory(DirHandle *dir)
	290	{
	291	FindClose(dir->h);
	292	if (dir->name)
	293	sfree(dir->name);
	294	sfree(dir);
	295	}
	296
	297	int test_wildcard(char *name, int cmdline)
	298	{
	299	HANDLE fh;
	300	WIN32_FIND_DATA fdat;
	301
	302	/* First see if the exact name exists. */
	303	if (GetFileAttributes(name) != (DWORD)-1)
	304	return WCTYPE_FILENAME;
	305
	306	/* Otherwise see if a wildcard match finds anything. */
	307	fh = FindFirstFile(name, &fdat);
	308	if (fh == INVALID_HANDLE_VALUE)
	309	return WCTYPE_NONEXISTENT;
	310
	311	FindClose(fh);
	312	return WCTYPE_WILDCARD;
	313	}
	314
	315	struct WildcardMatcher {
	316	HANDLE h;
	317	char *name;
	318	char *srcpath;
	319	};
	320
	321	/*
	322	* Return a pointer to the portion of str that comes after the last
	323	* slash (or backslash or colon, if `local' is TRUE).
	324	*/
	325	static char stripslashes(char str, int local)
	326	{
	327	char *p;
	328
	329	if (local) {
	330	p = strchr(str, ':');
	331	if (p) str = p+1;
	332	}
	333
	334	p = strrchr(str, '/');
	335	if (p) str = p+1;
	336
	337	if (local) {
	338	p = strrchr(str, '\\');
	339	if (p) str = p+1;
	340	}
	341
	342	return str;
	343	}
344
345	WildcardMatcher begin_wildcard_matching(char name)
346	{
347	HANDLE h;
348	WIN32_FIND_DATA fdat;
349	WildcardMatcher *ret;
350	char *last;
351
352	h = FindFirstFile(name, &fdat);
353	if (h == INVALID_HANDLE_VALUE)
354	return NULL;
355
356	ret = snew(WildcardMatcher);
357	ret->h = h;
358	ret->srcpath = dupstr(name);
359	last = stripslashes(ret->srcpath, 1);
360	*last = '\0';
361	if (fdat.cFileName[0] == '.' &&
362	(fdat.cFileName[1] == '\0' \|\|
363	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
364	ret->name = NULL;
365	else
366	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);
367
368	return ret;
369	}
370
371	char wildcard_get_filename(WildcardMatcher dir)
372	{
373	while (!dir->name) {
374	WIN32_FIND_DATA fdat;
375	int ok = FindNextFile(dir->h, &fdat);
376
377	if (!ok)
378	return NULL;
379
380	if (fdat.cFileName[0] == '.' &&
381	(fdat.cFileName[1] == '\0' \|\|
382	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
383	dir->name = NULL;
384	else
385	dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
386	}
387
388	if (dir->name) {
389	char *ret = dir->name;
390	dir->name = NULL;
391	return ret;
392	} else
393	return NULL;
394	}
395
396	void finish_wildcard_matching(WildcardMatcher *dir)
397	{
398	FindClose(dir->h);
399	if (dir->name)
400	sfree(dir->name);
401	sfree(dir->srcpath);
402	sfree(dir);
403	}
404
e9d14678	405	int vet_filename(char *name)
	406	{
	407	if (strchr(name, '/') \|\| strchr(name, '\\') \|\| strchr(name, ':'))
	408	return FALSE;
	409
	410	if (!name[strspn(name, ".")]) /* entirely composed of dots */
	411	return FALSE;
	412
	413	return TRUE;
	414	}
	415
799dfcfa	416	int create_directory(char *name)
	417	{
	418	return CreateDirectory(name, NULL) != 0;
	419	}
	420
8c7d710c	421	char dir_file_cat(char dir, char *file)
	422	{
	423	return dupcat(dir, "\\", file, NULL);
	424	}
	425
799dfcfa	426	/* ----------------------------------------------------------------------
	427	* Platform-specific network handling.
	428	*/
	429
	430	/*
	431	* Be told what socket we're supposed to be using.
	432	*/
65857773	433	static SOCKET sftp_ssh_socket = INVALID_SOCKET;
39934deb	434	static HANDLE netevent = NULL;
799dfcfa	435	char *do_select(SOCKET skt, int startup)
799dfcfa	436	{
39934deb	437	int events;
799dfcfa	438	if (startup)
	439	sftp_ssh_socket = skt;
	440	else
	441	sftp_ssh_socket = INVALID_SOCKET;
39934deb	442
	443	if (p_WSAEventSelect) {
	444	if (startup) {
	445	events = (FD_CONNECT \| FD_READ \| FD_WRITE \|
	446	FD_OOB \| FD_CLOSE \| FD_ACCEPT);
	447	netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	448	} else {
	449	events = 0;
	450	}
	451	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	452	switch (p_WSAGetLastError()) {
	453	case WSAENETDOWN:
	454	return "Network is down";
	455	default:
	456	return "WSAEventSelect(): unknown error";
	457	}
	458	}
	459	}
799dfcfa	460	return NULL;
	461	}
	462	extern int select_result(WPARAM, LPARAM);
	463
39934deb	464	int do_eventsel_loop(HANDLE other_event)
	465	{
	466	int n;
	467	long next, ticks;
	468	HANDLE handles[2];
	469	SOCKET *sklist;
	470	int skcount;
	471	long now = GETTICKCOUNT();
	472
	473	if (!netevent) {
	474	return -1; /* doom */
	475	}
	476
	477	handles[0] = netevent;
	478	handles[1] = other_event;
	479
	480	if (run_timers(now, &next)) {
	481	ticks = next - GETTICKCOUNT();
	482	if (ticks < 0) ticks = 0; /* just in case */
	483	} else {
	484	ticks = INFINITE;
	485	}
	486
	487	n = MsgWaitForMultipleObjects(other_event ? 2 : 1, handles, FALSE, ticks,
	488	QS_POSTMESSAGE);
	489
	490	if (n == WAIT_OBJECT_0 + 0) {
	491	WSANETWORKEVENTS things;
	492	SOCKET socket;
	493	extern SOCKET first_socket(int ), next_socket(int );
	494	extern int select_result(WPARAM, LPARAM);
	495	int i, socketstate;
	496
	497	/*
	498	* We must not call select_result() for any socket
	499	* until we have finished enumerating within the
	500	* tree. This is because select_result() may close
	501	* the socket and modify the tree.
	502	*/
	503	/* Count the active sockets. */
	504	i = 0;
	505	for (socket = first_socket(&socketstate);
	506	socket != INVALID_SOCKET;
	507	socket = next_socket(&socketstate)) i++;
	508
	509	/* Expand the buffer if necessary. */
	510	sklist = snewn(i, SOCKET);
	511
	512	/* Retrieve the sockets into sklist. */
	513	skcount = 0;
	514	for (socket = first_socket(&socketstate);
	515	socket != INVALID_SOCKET;
	516	socket = next_socket(&socketstate)) {
	517	sklist[skcount++] = socket;
	518	}
	519
	520	/* Now we're done enumerating; go through the list. */
	521	for (i = 0; i < skcount; i++) {
	522	WPARAM wp;
	523	socket = sklist[i];
	524	wp = (WPARAM) socket;
	525	if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
	526	static const struct { int bit, mask; } eventtypes[] = {
	527	{FD_CONNECT_BIT, FD_CONNECT},
528	{FD_READ_BIT, FD_READ},
529	{FD_CLOSE_BIT, FD_CLOSE},
530	{FD_OOB_BIT, FD_OOB},
531	{FD_WRITE_BIT, FD_WRITE},
532	{FD_ACCEPT_BIT, FD_ACCEPT},
533	};
534	int e;
535
536	noise_ultralight(socket);
537	noise_ultralight(things.lNetworkEvents);
538
539	for (e = 0; e < lenof(eventtypes); e++)
540	if (things.lNetworkEvents & eventtypes[e].mask) {
541	LPARAM lp;
542	int err = things.iErrorCode[eventtypes[e].bit];
543	lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
544	select_result(wp, lp);
545	}
546	}
547	}
548
549	sfree(sklist);
550	}
551
552	if (n == WAIT_TIMEOUT) {
553	now = next;
554	} else {
555	now = GETTICKCOUNT();
556	}
557
558	if (other_event && n == WAIT_OBJECT_0 + 1)
559	return 1;
560
561	return 0;
562	}
563
799dfcfa	564	/*
d6cc41e6	565	* Wait for some network data and process it.
39934deb	566	*
	567	* We have two variants of this function. One uses select() so that
	568	* it's compatible with WinSock 1. The other uses WSAEventSelect
	569	* and MsgWaitForMultipleObjects, so that we can consistently use
	570	* WSAEventSelect throughout; this enables us to also implement
	571	* ssh_sftp_get_cmdline() using a parallel mechanism.
d6cc41e6	572	*/
	573	int ssh_sftp_loop_iteration(void)
	574	{
d6cc41e6	575	if (sftp_ssh_socket == INVALID_SOCKET)
	576	return -1; /* doom */
	577
39934deb	578	if (p_WSAEventSelect == NULL) {
	579	fd_set readfds;
	580	int ret;
	581	long now = GETTICKCOUNT();
	582
	583	if (socket_writable(sftp_ssh_socket))
	584	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);
	585
	586	do {
	587	long next, ticks;
	588	struct timeval tv, *ptv;
	589
	590	if (run_timers(now, &next)) {
	591	ticks = next - GETTICKCOUNT();
	592	if (ticks <= 0)
	593	ticks = 1; /* just in case */
	594	tv.tv_sec = ticks / 1000;
	595	tv.tv_usec = ticks % 1000 * 1000;
	596	ptv = &tv;
	597	} else {
	598	ptv = NULL;
	599	}
	600
	601	FD_ZERO(&readfds);
	602	FD_SET(sftp_ssh_socket, &readfds);
	603	ret = p_select(1, &readfds, NULL, NULL, ptv);
	604
	605	if (ret < 0)
	606	return -1; /* doom */
	607	else if (ret == 0)
	608	now = next;
	609	else
	610	now = GETTICKCOUNT();
	611
	612	} while (ret == 0);
	613
	614	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);
	615
	616	return 0;
	617	} else {
	618	return do_eventsel_loop(NULL);
	619	}
	620	}
	621
	622	/*
	623	* Read a command line from standard input.
	624	*
	625	* In the presence of WinSock 2, we can use WSAEventSelect to
	626	* mediate between the socket and stdin, meaning we can send
	627	* keepalives and respond to server events even while waiting at
	628	* the PSFTP command prompt. Without WS2, we fall back to a simple
	629	* fgets.
	630	*/
	631	struct command_read_ctx {
	632	HANDLE event;
	633	char *line;
	634	};
	635
	636	static DWORD WINAPI command_read_thread(void *param)
	637	{
	638	struct command_read_ctx ctx = (struct command_read_ctx ) param;
	639
	640	ctx->line = fgetline(stdin);
	641
642	SetEvent(ctx->event);
d6cc41e6	643
d6cc41e6	644	return 0;
	645	}
	646
65857773	647	char ssh_sftp_get_cmdline(char prompt, int no_fds_ok)
39934deb	648	{
	649	int ret;
	650	struct command_read_ctx actx, *ctx = &actx;
	651	DWORD threadid;
	652
	653	fputs(prompt, stdout);
	654	fflush(stdout);
	655
65857773	656	if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) \|\|
65857773	657	p_WSAEventSelect == NULL) {
39934deb	658	return fgetline(stdin); /* very simple */
	659	}
	660
	661	/*
	662	* Create a second thread to read from stdin. Process network
	663	* and timing events until it terminates.
	664	*/
	665	ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
	666	ctx->line = NULL;
	667
	668	if (!CreateThread(NULL, 0, command_read_thread,
	669	ctx, 0, &threadid)) {
	670	fprintf(stderr, "Unable to create command input thread\n");
	671	cleanup_exit(1);
	672	}
	673
	674	do {
	675	ret = do_eventsel_loop(ctx->event);
	676
	677	/* Error return can only occur if netevent==NULL, and it ain't. */
	678	assert(ret >= 0);
	679	} while (ret == 0);
	680
	681	return ctx->line;
	682	}
	683
799dfcfa	684	/* ----------------------------------------------------------------------
d6cc41e6	685	* Main program. Parse arguments etc.
	686	*/
	687	int main(int argc, char *argv[])
	688	{
	689	int ret;
	690
d6cc41e6	691	ret = psftp_main(argc, argv);
d6cc41e6	692
	693	return ret;
	694	}