[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;
}

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