[u/mdw/putty] / unix / uxsftp.c

/*
 * uxsftp.c: the Unix-specific parts of PSFTP and PSCP.
 */

#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <utime.h>
#include <errno.h>
#include <assert.h>
#include <glob.h>

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

/*
 * In PSFTP our selects are synchronous, so these functions are
 * empty stubs.
 */
int uxsel_input_add(int fd, int rwx) { return 0; }
void uxsel_input_remove(int id) { }

char *x_get_default(const char *key)
{
    return NULL;		       /* this is a stub */
}

void platform_get_x11_auth(char *display, int *protocol,
                           unsigned char *data, int *datalen)
{
    /* Do nothing, therefore no auth. */
}

/*
 * Default settings that are specific to PSFTP.
 */
char *platform_default_s(const char *name)
{
    return NULL;
}

int platform_default_i(const char *name, int def)
{
    return def;
}

FontSpec platform_default_fontspec(const char *name)
{
    FontSpec ret;
    *ret.name = '\0';
    return ret;
}

Filename platform_default_filename(const char *name)
{
    Filename ret;
    if (!strcmp(name, "LogFileName"))
	strcpy(ret.path, "putty.log");
    else
	*ret.path = '\0';
    return ret;
}

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

/*
 * Stubs for the GUI feedback mechanism in Windows PSCP.
 */
void gui_update_stats(char *name, unsigned long size,
		      int percentage, unsigned long elapsed,
		      unsigned long done, unsigned long eta,
		      unsigned long ratebs) {}
void gui_send_errcount(int list, int errs) {}
void gui_send_char(int is_stderr, int c) {}
void gui_enable(char *arg) {}


/*
 * Set local current directory. Returns NULL on success, or else an
 * error message which must be freed after printing.
 */
char *psftp_lcd(char *dir)
{
    if (chdir(dir) < 0)
	return dupprintf("%s: chdir: %s", dir, strerror(errno));
    else
	return NULL;
}

/*
 * Get local current directory. Returns a string which must be
 * freed.
 */
char *psftp_getcwd(void)
{
    char *buffer, *ret;
    int size = 256;

    buffer = snewn(size, char);
    while (1) {
	ret = getcwd(buffer, size);
	if (ret != NULL)
	    return ret;
	if (errno != ERANGE) {
	    sfree(buffer);
	    return dupprintf("[cwd unavailable: %s]", strerror(errno));
	}
	/*
	 * Otherwise, ERANGE was returned, meaning the buffer
	 * wasn't big enough.
	 */
	size = size * 3 / 2;
	buffer = sresize(buffer, size, char);
    }
}

struct RFile {
    int fd;
};

RFile *open_existing_file(char *name, unsigned long *size,
			  unsigned long *mtime, unsigned long *atime)
{
    int fd;
    RFile *ret;

    fd = open(name, O_RDONLY);
    if (fd < 0)
	return NULL;

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

    if (size || mtime || atime) {
	struct stat statbuf;
	if (fstat(fd, &statbuf) < 0) {
	    fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
	    memset(&statbuf, 0, sizeof(statbuf));
	}

	if (size)
	    *size = statbuf.st_size;

	if (mtime)
	    *mtime = statbuf.st_mtime;

	if (atime)
	    *atime = statbuf.st_atime;
    }

    return ret;
}

int read_from_file(RFile *f, void *buffer, int length)
{
    return read(f->fd, buffer, length);
}

void close_rfile(RFile *f)
{
    close(f->fd);
    sfree(f);
}

struct WFile {
    int fd;
    char *name;
};

WFile *open_new_file(char *name)
{
    int fd;
    WFile *ret;

    fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, 0666);
    if (fd < 0)
	return NULL;

    ret = snew(WFile);
    ret->fd = fd;
    ret->name = dupstr(name);

    return ret;
}

int write_to_file(WFile *f, void *buffer, int length)
{
    char *p = (char *)buffer;
    int so_far = 0;

    /* Keep trying until we've really written as much as we can. */
    while (length > 0) {
	int ret = write(f->fd, p, length);

	if (ret < 0)
	    return ret;

	if (ret == 0)
	    break;

	p += ret;
	length -= ret;
	so_far += ret;
    }

    return so_far;
}

void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
{
    struct utimbuf ut;

    ut.actime = atime;
    ut.modtime = mtime;

    utime(f->name, &ut);
}

/* Closes and frees the WFile */
void close_wfile(WFile *f)
{
    close(f->fd);
    sfree(f->name);
    sfree(f);
}

int file_type(char *name)
{
    struct stat statbuf;

    if (stat(name, &statbuf) < 0) {
	if (errno != ENOENT)
	    fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
	return FILE_TYPE_NONEXISTENT;
    }

    if (S_ISREG(statbuf.st_mode))
	return FILE_TYPE_FILE;

    if (S_ISDIR(statbuf.st_mode))
	return FILE_TYPE_DIRECTORY;

    return FILE_TYPE_WEIRD;
}

struct DirHandle {
    DIR *dir;
};

DirHandle *open_directory(char *name)
{
    DIR *dir;
    DirHandle *ret;

    dir = opendir(name);
    if (!dir)
	return NULL;

    ret = snew(DirHandle);
    ret->dir = dir;
    return ret;
}

char *read_filename(DirHandle *dir)
{
    struct dirent *de;

    do {
	de = readdir(dir->dir);
	if (de == NULL)
	    return NULL;
    } while ((de->d_name[0] == '.' &&
	      (de->d_name[1] == '\0' ||
	       (de->d_name[1] == '.' && de->d_name[2] == '\0'))));

    return dupstr(de->d_name);
}

void close_directory(DirHandle *dir)
{
    closedir(dir->dir);
    sfree(dir);
}

int test_wildcard(char *name, int cmdline)
{
    struct stat statbuf;

    if (stat(name, &statbuf) == 0) {
	return WCTYPE_FILENAME;
    } else if (cmdline) {
	/*
	 * On Unix, we never need to parse wildcards coming from
	 * the command line, because the shell will have expanded
	 * them into a filename list already.
	 */
	return WCTYPE_NONEXISTENT;
    } else {
	glob_t globbed;
	int ret = WCTYPE_NONEXISTENT;

	if (glob(name, GLOB_ERR, NULL, &globbed) == 0) {
	    if (globbed.gl_pathc > 0)
		ret = WCTYPE_WILDCARD;
	    globfree(&globbed);
	}

	return ret;
    }
}

/*
 * Actually return matching file names for a local wildcard.
 */
struct WildcardMatcher {
    glob_t globbed;
    int i;
};
WildcardMatcher *begin_wildcard_matching(char *name) {
    WildcardMatcher *ret = snew(WildcardMatcher);

    if (glob(name, 0, NULL, &ret->globbed) < 0) {
	sfree(ret);
	return NULL;
    }

    ret->i = 0;

    return ret;
}
char *wildcard_get_filename(WildcardMatcher *dir) {
    if (dir->i < dir->globbed.gl_pathc) {
	return dupstr(dir->globbed.gl_pathv[dir->i++]);
    } else
	return NULL;
}
void finish_wildcard_matching(WildcardMatcher *dir) {
    globfree(&dir->globbed);
    sfree(dir);
}

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

    if (name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2])))
	return FALSE;

    return TRUE;
}

int create_directory(char *name)
{
    return mkdir(name, 0777) == 0;
}

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

/*
 * Do a select() between all currently active network fds and
 * optionally stdin.
 */
static int ssh_sftp_do_select(int include_stdin, int no_fds_ok)
{
    fd_set rset, wset, xset;
    int i, fdcount, fdsize, *fdlist;
    int fd, fdstate, rwx, ret, maxfd;
    long now = GETTICKCOUNT();

    fdlist = NULL;
    fdcount = fdsize = 0;

    do {

	/* Count the currently active fds. */
	i = 0;
	for (fd = first_fd(&fdstate, &rwx); fd >= 0;
	     fd = next_fd(&fdstate, &rwx)) i++;

	if (i < 1 && !no_fds_ok)
	    return -1;		       /* doom */

	/* Expand the fdlist buffer if necessary. */
	if (i > fdsize) {
	    fdsize = i + 16;
	    fdlist = sresize(fdlist, fdsize, int);
	}

	FD_ZERO(&rset);
	FD_ZERO(&wset);
	FD_ZERO(&xset);
	maxfd = 0;

	/*
	 * Add all currently open fds to the select sets, and store
	 * them in fdlist as well.
	 */
	fdcount = 0;
	for (fd = first_fd(&fdstate, &rwx); fd >= 0;
	     fd = next_fd(&fdstate, &rwx)) {
	    fdlist[fdcount++] = fd;
	    if (rwx & 1)
		FD_SET_MAX(fd, maxfd, rset);
	    if (rwx & 2)
		FD_SET_MAX(fd, maxfd, wset);
	    if (rwx & 4)
		FD_SET_MAX(fd, maxfd, xset);
	}

	if (include_stdin)
	    FD_SET_MAX(0, maxfd, rset);

	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;
	    }
	    ret = select(maxfd, &rset, &wset, &xset, ptv);
	    if (ret == 0)
		now = next;
	    else {
		long newnow = GETTICKCOUNT();
		/*
		 * Check to see whether the system clock has
		 * changed massively during the select.
		 */
		if (newnow - now < 0 || newnow - now > next - now) {
		    /*
		     * If so, look at the elapsed time in the
		     * select and use it to compute a new
		     * tickcount_offset.
		     */
		    long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000;
		    /* So we'd like GETTICKCOUNT to have returned othernow,
		     * but instead it return newnow. Hence ... */
		    tickcount_offset += othernow - newnow;
		    now = othernow;
		} else {
		    now = newnow;
		}
	    }
	} while (ret < 0 && errno != EINTR);
    } while (ret == 0);

    if (ret < 0) {
	perror("select");
	exit(1);
    }

    for (i = 0; i < fdcount; i++) {
	fd = fdlist[i];
	/*
	 * We must process exceptional notifications before
	 * ordinary readability ones, or we may go straight
	 * past the urgent marker.
	 */
	if (FD_ISSET(fd, &xset))
	    select_result(fd, 4);
	if (FD_ISSET(fd, &rset))
	    select_result(fd, 1);
	if (FD_ISSET(fd, &wset))
	    select_result(fd, 2);
    }

    sfree(fdlist);

    return FD_ISSET(0, &rset) ? 1 : 0;
}

/*
 * Wait for some network data and process it.
 */
int ssh_sftp_loop_iteration(void)
{
    return ssh_sftp_do_select(FALSE, FALSE);
}

/*
 * Read a PSFTP command line from stdin.
 */
char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok)
{
    char *buf;
    int buflen, bufsize, ret;

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

    buf = NULL;
    buflen = bufsize = 0;

    while (1) {
	ret = ssh_sftp_do_select(TRUE, no_fds_ok);
	if (ret < 0) {
	    printf("connection died\n");
	    return NULL;	       /* woop woop */
	}
	if (ret > 0) {
	    if (buflen >= bufsize) {
		bufsize = buflen + 512;
		buf = sresize(buf, bufsize, char);
	    }
	    ret = read(0, buf+buflen, 1);
	    if (ret < 0) {
		perror("read");
		return NULL;
	    }
	    if (ret == 0) {
		/* eof on stdin; no error, but no answer either */
		return NULL;
	    }

	    if (buf[buflen++] == '\n') {
		/* we have a full line */
		return buf;
	    }
	}
    }
}

/*
 * Main program: do platform-specific initialisation and then call
 * psftp_main().
 */
int main(int argc, char *argv[])
{
    uxsel_init();
    return psftp_main(argc, argv);
}
Commit	Line	Data
876eefd4	1	/*
	2	* uxsftp.c: the Unix-specific parts of PSFTP and PSCP.
	3	*/
	4
	5	#include <sys/time.h>
	6	#include <sys/types.h>
	7	#include <sys/stat.h>
18609086	8	#include <stdlib.h>
876eefd4	9	#include <fcntl.h>
	10	#include <dirent.h>
	11	#include <unistd.h>
	12	#include <utime.h>
	13	#include <errno.h>
	14	#include <assert.h>
9c77ddf6	15	#include <glob.h>
876eefd4	16
	17	#include "putty.h"
	18	#include "psftp.h"
	19
	20	/*
	21	* In PSFTP our selects are synchronous, so these functions are
	22	* empty stubs.
	23	*/
	24	int uxsel_input_add(int fd, int rwx) { return 0; }
	25	void uxsel_input_remove(int id) { }
	26
	27	char x_get_default(const char key)
	28	{
	29	return NULL; /* this is a stub */
	30	}
	31
	32	void platform_get_x11_auth(char display, int protocol,
	33	unsigned char data, int datalen)
	34	{
	35	/* Do nothing, therefore no auth. */
	36	}
	37
	38	/*
	39	* Default settings that are specific to PSFTP.
	40	*/
	41	char platform_default_s(const char name)
	42	{
	43	return NULL;
	44	}
	45
	46	int platform_default_i(const char *name, int def)
	47	{
	48	return def;
	49	}
	50
	51	FontSpec platform_default_fontspec(const char *name)
	52	{
	53	FontSpec ret;
	54	*ret.name = '\0';
	55	return ret;
	56	}
	57
	58	Filename platform_default_filename(const char *name)
	59	{
	60	Filename ret;
	61	if (!strcmp(name, "LogFileName"))
	62	strcpy(ret.path, "putty.log");
	63	else
	64	*ret.path = '\0';
	65	return ret;
	66	}
	67
c6ccd5c2	68	char get_ttymode(void frontend, const char *mode) { return NULL; }
c6ccd5c2	69
876eefd4	70	/*
	71	* Stubs for the GUI feedback mechanism in Windows PSCP.
	72	*/
	73	void gui_update_stats(char *name, unsigned long size,
	74	int percentage, unsigned long elapsed,
	75	unsigned long done, unsigned long eta,
	76	unsigned long ratebs) {}
	77	void gui_send_errcount(int list, int errs) {}
	78	void gui_send_char(int is_stderr, int c) {}
	79	void gui_enable(char *arg) {}
	80
	81
	82	/*
	83	* Set local current directory. Returns NULL on success, or else an
	84	* error message which must be freed after printing.
	85	*/
	86	char psftp_lcd(char dir)
	87	{
	88	if (chdir(dir) < 0)
	89	return dupprintf("%s: chdir: %s", dir, strerror(errno));
	90	else
	91	return NULL;
	92	}
	93
	94	/*
	95	* Get local current directory. Returns a string which must be
	96	* freed.
	97	*/
	98	char *psftp_getcwd(void)
	99	{
	100	char buffer, ret;
	101	int size = 256;
	102
	103	buffer = snewn(size, char);
	104	while (1) {
	105	ret = getcwd(buffer, size);
	106	if (ret != NULL)
	107	return ret;
	108	if (errno != ERANGE) {
	109	sfree(buffer);
	110	return dupprintf("[cwd unavailable: %s]", strerror(errno));
	111	}
	112	/*
	113	* Otherwise, ERANGE was returned, meaning the buffer
	114	* wasn't big enough.
	115	*/
	116	size = size * 3 / 2;
	117	buffer = sresize(buffer, size, char);
	118	}
	119	}
	120
	121	struct RFile {
	122	int fd;
	123	};
	124
	125	RFile open_existing_file(char name, unsigned long *size,
	126	unsigned long mtime, unsigned long atime)
	127	{
	128	int fd;
	129	RFile *ret;
	130
	131	fd = open(name, O_RDONLY);
	132	if (fd < 0)
	133	return NULL;
134
135	ret = snew(RFile);
136	ret->fd = fd;
137
138	if (size \|\| mtime \|\| atime) {
139	struct stat statbuf;
140	if (fstat(fd, &statbuf) < 0) {
141	fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
142	memset(&statbuf, 0, sizeof(statbuf));
143	}
144
145	if (size)
146	*size = statbuf.st_size;
147
148	if (mtime)
149	*mtime = statbuf.st_mtime;
150
151	if (atime)
152	*atime = statbuf.st_atime;
153	}
154
155	return ret;
156	}
157
158	int read_from_file(RFile f, void buffer, int length)
159	{
160	return read(f->fd, buffer, length);
161	}
162
163	void close_rfile(RFile *f)
164	{
165	close(f->fd);
166	sfree(f);
167	}
168
169	struct WFile {
170	int fd;
171	char *name;
172	};
173
174	WFile open_new_file(char name)
175	{
176	int fd;
177	WFile *ret;
178
179	fd = open(name, O_CREAT \| O_TRUNC \| O_WRONLY, 0666);
180	if (fd < 0)
181	return NULL;
182
183	ret = snew(WFile);
184	ret->fd = fd;
185	ret->name = dupstr(name);
186
187	return ret;
188	}
189
190	int write_to_file(WFile f, void buffer, int length)
191	{
192	char p = (char )buffer;
193	int so_far = 0;
194
195	/* Keep trying until we've really written as much as we can. */
196	while (length > 0) {
197	int ret = write(f->fd, p, length);
198
199	if (ret < 0)
200	return ret;
201
202	if (ret == 0)
203	break;
204
205	p += ret;
206	length -= ret;
207	so_far += ret;
208	}
209
210	return so_far;
211	}
212
213	void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
214	{
215	struct utimbuf ut;
216
217	ut.actime = atime;
218	ut.modtime = mtime;
219
220	utime(f->name, &ut);
221	}
222
223	/* Closes and frees the WFile */
224	void close_wfile(WFile *f)
225	{
226	close(f->fd);
227	sfree(f->name);
228	sfree(f);
229	}
230
231	int file_type(char *name)
232	{
233	struct stat statbuf;
234
235	if (stat(name, &statbuf) < 0) {
236	if (errno != ENOENT)
237	fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
238	return FILE_TYPE_NONEXISTENT;
239	}
240
241	if (S_ISREG(statbuf.st_mode))
242	return FILE_TYPE_FILE;
243
244	if (S_ISDIR(statbuf.st_mode))
245	return FILE_TYPE_DIRECTORY;
246
247	return FILE_TYPE_WEIRD;
248	}
249
250	struct DirHandle {
251	DIR *dir;
252	};
253
254	DirHandle open_directory(char name)
255	{
256	DIR *dir;
257	DirHandle *ret;
258
259	dir = opendir(name);
260	if (!dir)
261	return NULL;
262
263	ret = snew(DirHandle);
264	ret->dir = dir;
265	return ret;
266	}
267
268	char read_filename(DirHandle dir)
269	{
270	struct dirent *de;
271
272	do {
273	de = readdir(dir->dir);
274	if (de == NULL)
275	return NULL;
276	} while ((de->d_name[0] == '.' &&
277	(de->d_name[1] == '\0' \|\|
278	(de->d_name[1] == '.' && de->d_name[2] == '\0'))));
279
280	return dupstr(de->d_name);
281	}
282
283	void close_directory(DirHandle *dir)
284	{
285	closedir(dir->dir);
286	sfree(dir);
287	}
288
289	int test_wildcard(char *name, int cmdline)
290	{
876eefd4	291	struct stat statbuf;
876eefd4	292
9c77ddf6	293	if (stat(name, &statbuf) == 0) {
876eefd4	294	return WCTYPE_FILENAME;
9c77ddf6	295	} else if (cmdline) {
	296	/*
	297	* On Unix, we never need to parse wildcards coming from
	298	* the command line, because the shell will have expanded
	299	* them into a filename list already.
	300	*/
	301	return WCTYPE_NONEXISTENT;
	302	} else {
	303	glob_t globbed;
	304	int ret = WCTYPE_NONEXISTENT;
	305
	306	if (glob(name, GLOB_ERR, NULL, &globbed) == 0) {
	307	if (globbed.gl_pathc > 0)
	308	ret = WCTYPE_WILDCARD;
	309	globfree(&globbed);
	310	}
	311
	312	return ret;
	313	}
876eefd4	314	}
	315
	316	/*
9c77ddf6	317	* Actually return matching file names for a local wildcard.
876eefd4	318	*/
876eefd4	319	struct WildcardMatcher {
9c77ddf6	320	glob_t globbed;
9c77ddf6	321	int i;
876eefd4	322	};
9c77ddf6	323	WildcardMatcher begin_wildcard_matching(char name) {
	324	WildcardMatcher *ret = snew(WildcardMatcher);
	325
	326	if (glob(name, 0, NULL, &ret->globbed) < 0) {
	327	sfree(ret);
	328	return NULL;
	329	}
	330
	331	ret->i = 0;
	332
	333	return ret;
	334	}
	335	char wildcard_get_filename(WildcardMatcher dir) {
	336	if (dir->i < dir->globbed.gl_pathc) {
	337	return dupstr(dir->globbed.gl_pathv[dir->i++]);
	338	} else
	339	return NULL;
	340	}
	341	void finish_wildcard_matching(WildcardMatcher *dir) {
	342	globfree(&dir->globbed);
	343	sfree(dir);
	344	}
876eefd4	345
e9d14678	346	int vet_filename(char *name)
	347	{
	348	if (strchr(name, '/'))
	349	return FALSE;
	350
	351	if (name[0] == '.' && (!name[1] \|\| (name[1] == '.' && !name[2])))
	352	return FALSE;
	353
	354	return TRUE;
	355	}
	356
876eefd4	357	int create_directory(char *name)
	358	{
	359	return mkdir(name, 0777) == 0;
	360	}
	361
	362	char dir_file_cat(char dir, char *file)
	363	{
	364	return dupcat(dir, "/", file, NULL);
	365	}
	366
	367	/*
39934deb	368	* Do a select() between all currently active network fds and
39934deb	369	* optionally stdin.
876eefd4	370	*/
65857773	371	static int ssh_sftp_do_select(int include_stdin, int no_fds_ok)
876eefd4	372	{
	373	fd_set rset, wset, xset;
	374	int i, fdcount, fdsize, *fdlist;
	375	int fd, fdstate, rwx, ret, maxfd;
39934deb	376	long now = GETTICKCOUNT();
876eefd4	377
	378	fdlist = NULL;
	379	fdcount = fdsize = 0;
	380
39934deb	381	do {
876eefd4	382
39934deb	383	/* Count the currently active fds. */
	384	i = 0;
	385	for (fd = first_fd(&fdstate, &rwx); fd >= 0;
	386	fd = next_fd(&fdstate, &rwx)) i++;
876eefd4	387
65857773	388	if (i < 1 && !no_fds_ok)
39934deb	389	return -1; /* doom */
876eefd4	390
39934deb	391	/* Expand the fdlist buffer if necessary. */
	392	if (i > fdsize) {
	393	fdsize = i + 16;
	394	fdlist = sresize(fdlist, fdsize, int);
	395	}
876eefd4	396
39934deb	397	FD_ZERO(&rset);
	398	FD_ZERO(&wset);
	399	FD_ZERO(&xset);
	400	maxfd = 0;
876eefd4	401
39934deb	402	/*
	403	* Add all currently open fds to the select sets, and store
	404	* them in fdlist as well.
	405	*/
	406	fdcount = 0;
	407	for (fd = first_fd(&fdstate, &rwx); fd >= 0;
	408	fd = next_fd(&fdstate, &rwx)) {
	409	fdlist[fdcount++] = fd;
	410	if (rwx & 1)
	411	FD_SET_MAX(fd, maxfd, rset);
	412	if (rwx & 2)
	413	FD_SET_MAX(fd, maxfd, wset);
	414	if (rwx & 4)
	415	FD_SET_MAX(fd, maxfd, xset);
	416	}
	417
	418	if (include_stdin)
	419	FD_SET_MAX(0, maxfd, rset);
	420
	421	do {
	422	long next, ticks;
	423	struct timeval tv, *ptv;
	424
	425	if (run_timers(now, &next)) {
	426	ticks = next - GETTICKCOUNT();
	427	if (ticks <= 0)
	428	ticks = 1; /* just in case */
	429	tv.tv_sec = ticks / 1000;
	430	tv.tv_usec = ticks % 1000 * 1000;
	431	ptv = &tv;
	432	} else {
	433	ptv = NULL;
	434	}
	435	ret = select(maxfd, &rset, &wset, &xset, ptv);
	436	if (ret == 0)
	437	now = next;
2ac3322e	438	else {
	439	long newnow = GETTICKCOUNT();
	440	/*
	441	* Check to see whether the system clock has
	442	* changed massively during the select.
	443	*/
	444	if (newnow - now < 0 \|\| newnow - now > next - now) {
	445	/*
	446	* If so, look at the elapsed time in the
	447	* select and use it to compute a new
	448	* tickcount_offset.
	449	*/
	450	long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000;
	451	/* So we'd like GETTICKCOUNT to have returned othernow,
	452	* but instead it return newnow. Hence ... */
	453	tickcount_offset += othernow - newnow;
	454	now = othernow;
	455	} else {
	456	now = newnow;
	457	}
	458	}
39934deb	459	} while (ret < 0 && errno != EINTR);
39934deb	460	} while (ret == 0);
876eefd4	461
	462	if (ret < 0) {
	463	perror("select");
	464	exit(1);
	465	}
	466
	467	for (i = 0; i < fdcount; i++) {
	468	fd = fdlist[i];
	469	/*
	470	* We must process exceptional notifications before
	471	* ordinary readability ones, or we may go straight
	472	* past the urgent marker.
	473	*/
	474	if (FD_ISSET(fd, &xset))
	475	select_result(fd, 4);
	476	if (FD_ISSET(fd, &rset))
	477	select_result(fd, 1);
	478	if (FD_ISSET(fd, &wset))
	479	select_result(fd, 2);
	480	}
	481
	482	sfree(fdlist);
	483
39934deb	484	return FD_ISSET(0, &rset) ? 1 : 0;
	485	}
	486
	487	/*
	488	* Wait for some network data and process it.
	489	*/
	490	int ssh_sftp_loop_iteration(void)
	491	{
65857773	492	return ssh_sftp_do_select(FALSE, FALSE);
39934deb	493	}
	494
	495	/*
	496	* Read a PSFTP command line from stdin.
	497	*/
65857773	498	char ssh_sftp_get_cmdline(char prompt, int no_fds_ok)
39934deb	499	{
	500	char *buf;
	501	int buflen, bufsize, ret;
	502
	503	fputs(prompt, stdout);
	504	fflush(stdout);
	505
	506	buf = NULL;
	507	buflen = bufsize = 0;
	508
	509	while (1) {
65857773	510	ret = ssh_sftp_do_select(TRUE, no_fds_ok);
39934deb	511	if (ret < 0) {
	512	printf("connection died\n");
	513	return NULL; /* woop woop */
	514	}
	515	if (ret > 0) {
	516	if (buflen >= bufsize) {
	517	bufsize = buflen + 512;
	518	buf = sresize(buf, bufsize, char);
	519	}
	520	ret = read(0, buf+buflen, 1);
	521	if (ret < 0) {
	522	perror("read");
	523	return NULL;
	524	}
	525	if (ret == 0) {
	526	/* eof on stdin; no error, but no answer either */
	527	return NULL;
	528	}
	529
	530	if (buf[buflen++] == '\n') {
	531	/* we have a full line */
	532	return buf;
	533	}
	534	}
	535	}
876eefd4	536	}
	537
	538	/*
	539	* Main program: do platform-specific initialisation and then call
	540	* psftp_main().
	541	*/
	542	int main(int argc, char *argv[])
	543	{
	544	uxsel_init();
	545	return psftp_main(argc, argv);
	546	}