--- old/usr/src/cmd/ssh/sftp-server/sftp-server.c	Tue Aug 16 19:27:15 2016
+++ /dev/null	Tue Aug 16 19:26:53 2016
@@ -1,1364 +0,0 @@
-/*
- * Copyright (c) 2000-2004 Markus Friedl.  All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-/* $OpenBSD: sftp-server.c,v 1.71 2007/01/03 07:22:36 stevesk Exp $ */
-
-#include "includes.h"
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#endif
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <pwd.h>
-#include <time.h>
-#include <unistd.h>
-#include <stdarg.h>
-
-#include "xmalloc.h"
-#include "buffer.h"
-#include "bufaux.h"
-#include "log.h"
-#include "misc.h"
-#include "uidswap.h"
-
-#include "sftp.h"
-#include "sftp-common.h"
-
-#ifdef HAVE___PROGNAME
-extern char *__progname;
-#else
-char *__progname;
-#endif
-
-/* helper */
-#define get_int64()			buffer_get_int64(&iqueue);
-#define get_int()			buffer_get_int(&iqueue);
-#define get_string(lenp)		buffer_get_string(&iqueue, lenp);
-
-void cleanup_exit(int i);
-
-/* Our verbosity */
-LogLevel log_level = SYSLOG_LEVEL_ERROR;
-
-/* Our client */
-struct passwd *pw = NULL;
-char *client_addr = NULL;
-
-/* input and output queue */
-Buffer iqueue;
-Buffer oqueue;
-
-/* Version of client */
-int version;
-
-/* portable attributes, etc. */
-
-typedef struct Stat Stat;
-
-struct Stat {
-	char *name;
-	char *long_name;
-	Attrib attrib;
-};
-
-static int
-errno_to_portable(int unixerrno)
-{
-	int ret = 0;
-
-	switch (unixerrno) {
-	case 0:
-		ret = SSH2_FX_OK;
-		break;
-	case ENOENT:
-	case ENOTDIR:
-	case EBADF:
-	case ELOOP:
-		ret = SSH2_FX_NO_SUCH_FILE;
-		break;
-	case EPERM:
-	case EACCES:
-	case EFAULT:
-		ret = SSH2_FX_PERMISSION_DENIED;
-		break;
-	case ENAMETOOLONG:
-	case EINVAL:
-		ret = SSH2_FX_BAD_MESSAGE;
-		break;
-	default:
-		ret = SSH2_FX_FAILURE;
-		break;
-	}
-	return ret;
-}
-
-static int
-flags_from_portable(int pflags)
-{
-	int flags = 0;
-
-	if ((pflags & SSH2_FXF_READ) &&
-	    (pflags & SSH2_FXF_WRITE)) {
-		flags = O_RDWR;
-	} else if (pflags & SSH2_FXF_READ) {
-		flags = O_RDONLY;
-	} else if (pflags & SSH2_FXF_WRITE) {
-		flags = O_WRONLY;
-	}
-	if (pflags & SSH2_FXF_CREAT)
-		flags |= O_CREAT;
-	if (pflags & SSH2_FXF_TRUNC)
-		flags |= O_TRUNC;
-	if (pflags & SSH2_FXF_EXCL)
-		flags |= O_EXCL;
-	return flags;
-}
-
-static const char *
-string_from_portable(int pflags)
-{
-	static char ret[128];
-
-	*ret = '\0';
-
-#define PAPPEND(str)	{				\
-		if (*ret != '\0')			\
-			strlcat(ret, ",", sizeof(ret));	\
-		strlcat(ret, str, sizeof(ret));		\
-	}
-
-	if (pflags & SSH2_FXF_READ)
-		PAPPEND("READ")
-	if (pflags & SSH2_FXF_WRITE)
-		PAPPEND("WRITE")
-	if (pflags & SSH2_FXF_CREAT)
-		PAPPEND("CREATE")
-	if (pflags & SSH2_FXF_TRUNC)
-		PAPPEND("TRUNCATE")
-	if (pflags & SSH2_FXF_EXCL)
-		PAPPEND("EXCL")
-
-	return ret;
-}
-
-static Attrib *
-get_attrib(void)
-{
-	return decode_attrib(&iqueue);
-}
-
-/* handle handles */
-
-typedef struct Handle Handle;
-struct Handle {
-	int use;
-	DIR *dirp;
-	int fd;
-	char *name;
-	u_int64_t bytes_read, bytes_write;
-};
-
-enum {
-	HANDLE_UNUSED,
-	HANDLE_DIR,
-	HANDLE_FILE
-};
-
-Handle	handles[100];
-
-static void
-handle_init(void)
-{
-	u_int i;
-
-	for (i = 0; i < sizeof(handles)/sizeof(Handle); i++)
-		handles[i].use = HANDLE_UNUSED;
-}
-
-static int
-handle_new(int use, const char *name, int fd, DIR *dirp)
-{
-	u_int i;
-
-	for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
-		if (handles[i].use == HANDLE_UNUSED) {
-			handles[i].use = use;
-			handles[i].dirp = dirp;
-			handles[i].fd = fd;
-			handles[i].name = xstrdup(name);
-			handles[i].bytes_read = handles[i].bytes_write = 0;
-			return i;
-		}
-	}
-	return -1;
-}
-
-static int
-handle_is_ok(int i, int type)
-{
-	return i >= 0 && (u_int)i < sizeof(handles)/sizeof(Handle) &&
-	    handles[i].use == type;
-}
-
-static int
-handle_to_string(int handle, char **stringp, int *hlenp)
-{
-	if (stringp == NULL || hlenp == NULL)
-		return -1;
-	*stringp = xmalloc(sizeof(int32_t));
-	put_u32(*stringp, handle);
-	*hlenp = sizeof(int32_t);
-	return 0;
-}
-
-static int
-handle_from_string(const char *handle, u_int hlen)
-{
-	int val;
-
-	if (hlen != sizeof(int32_t))
-		return -1;
-	val = get_u32(handle);
-	if (handle_is_ok(val, HANDLE_FILE) ||
-	    handle_is_ok(val, HANDLE_DIR))
-		return val;
-	return -1;
-}
-
-static char *
-handle_to_name(int handle)
-{
-	if (handle_is_ok(handle, HANDLE_DIR)||
-	    handle_is_ok(handle, HANDLE_FILE))
-		return handles[handle].name;
-	return NULL;
-}
-
-static DIR *
-handle_to_dir(int handle)
-{
-	if (handle_is_ok(handle, HANDLE_DIR))
-		return handles[handle].dirp;
-	return NULL;
-}
-
-static int
-handle_to_fd(int handle)
-{
-	if (handle_is_ok(handle, HANDLE_FILE))
-		return handles[handle].fd;
-	return -1;
-}
-
-static void
-handle_update_read(int handle, ssize_t bytes)
-{
-	if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
-		handles[handle].bytes_read += bytes;
-}
-
-static void
-handle_update_write(int handle, ssize_t bytes)
-{
-	if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
-		handles[handle].bytes_write += bytes;
-}
-
-static u_int64_t
-handle_bytes_read(int handle)
-{
-	if (handle_is_ok(handle, HANDLE_FILE))
-		return (handles[handle].bytes_read);
-	return 0;
-}
-
-static u_int64_t
-handle_bytes_write(int handle)
-{
-	if (handle_is_ok(handle, HANDLE_FILE))
-		return (handles[handle].bytes_write);
-	return 0;
-}
-
-static int
-handle_close(int handle)
-{
-	int ret = -1;
-
-	if (handle_is_ok(handle, HANDLE_FILE)) {
-		ret = close(handles[handle].fd);
-		handles[handle].use = HANDLE_UNUSED;
-		xfree(handles[handle].name);
-	} else if (handle_is_ok(handle, HANDLE_DIR)) {
-		ret = closedir(handles[handle].dirp);
-		handles[handle].use = HANDLE_UNUSED;
-		xfree(handles[handle].name);
-	} else {
-		errno = ENOENT;
-	}
-	return ret;
-}
-
-static void
-handle_log_close(int handle, char *emsg)
-{
-	if (handle_is_ok(handle, HANDLE_FILE)) {
-		log("%s%sclose \"%s\" bytes read %llu written %llu",
-		    emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
-		    handle_to_name(handle),
-		    (unsigned long long)handle_bytes_read(handle),
-		    (unsigned long long)handle_bytes_write(handle));
-	} else {
-		log("%s%sclosedir \"%s\"",
-		    emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
-		    handle_to_name(handle));
-	}
-}
-
-static void
-handle_log_exit(void)
-{
-	u_int i;
-
-	for (i = 0; i < sizeof(handles)/sizeof(Handle); i++)
-		if (handles[i].use != HANDLE_UNUSED)
-			handle_log_close(i, "forced");
-}
-
-static int
-get_handle(void)
-{
-	char *handle;
-	int val = -1;
-	u_int hlen;
-
-	handle = get_string(&hlen);
-	if (hlen < 256)
-		val = handle_from_string(handle, hlen);
-	xfree(handle);
-	return val;
-}
-
-/* send replies */
-
-static void
-send_msg(Buffer *m)
-{
-	int mlen = buffer_len(m);
-
-	buffer_put_int(&oqueue, mlen);
-	buffer_append(&oqueue, buffer_ptr(m), mlen);
-	buffer_consume(m, mlen);
-}
-
-static const char *
-status_to_message(u_int32_t status)
-{
-	const char *status_messages[] = {
-		"Success",			/* SSH_FX_OK */
-		"End of file",			/* SSH_FX_EOF */
-		"No such file",			/* SSH_FX_NO_SUCH_FILE */
-		"Permission denied",		/* SSH_FX_PERMISSION_DENIED */
-		"Failure",			/* SSH_FX_FAILURE */
-		"Bad message",			/* SSH_FX_BAD_MESSAGE */
-		"No connection",		/* SSH_FX_NO_CONNECTION */
-		"Connection lost",		/* SSH_FX_CONNECTION_LOST */
-		"Operation unsupported",	/* SSH_FX_OP_UNSUPPORTED */
-		"Unknown error"			/* Others */
-	};
-	return (status_messages[MIN(status,SSH2_FX_MAX)]);
-}
-
-static void
-send_status(u_int32_t id, u_int32_t status)
-{
-	Buffer msg;
-
-	debug3("request %u: sent status %u", id, status);
-	if (log_level > SYSLOG_LEVEL_VERBOSE ||
-	    (status != SSH2_FX_OK && status != SSH2_FX_EOF))
-		log("sent status %s", status_to_message(status));
-	buffer_init(&msg);
-	buffer_put_char(&msg, SSH2_FXP_STATUS);
-	buffer_put_int(&msg, id);
-	buffer_put_int(&msg, status);
-	if (version >= 3) {
-		buffer_put_cstring(&msg, status_to_message(status));
-		buffer_put_cstring(&msg, "");
-	}
-	send_msg(&msg);
-	buffer_free(&msg);
-}
-static void
-send_data_or_handle(char type, u_int32_t id, const char *data, int dlen)
-{
-	Buffer msg;
-
-	buffer_init(&msg);
-	buffer_put_char(&msg, type);
-	buffer_put_int(&msg, id);
-	buffer_put_string(&msg, data, dlen);
-	send_msg(&msg);
-	buffer_free(&msg);
-}
-
-static void
-send_data(u_int32_t id, const char *data, int dlen)
-{
-	debug("request %u: sent data len %d", id, dlen);
-	send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
-}
-
-static void
-send_handle(u_int32_t id, int handle)
-{
-	char *string;
-	int hlen;
-
-	handle_to_string(handle, &string, &hlen);
-	debug("request %u: sent handle handle %d", id, handle);
-	send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
-	xfree(string);
-}
-
-static void
-send_names(u_int32_t id, int count, const Stat *stats)
-{
-	Buffer msg;
-	int i;
-
-	buffer_init(&msg);
-	buffer_put_char(&msg, SSH2_FXP_NAME);
-	buffer_put_int(&msg, id);
-	buffer_put_int(&msg, count);
-	debug("request %u: sent names count %d", id, count);
-	for (i = 0; i < count; i++) {
-		buffer_put_cstring(&msg, stats[i].name);
-		buffer_put_cstring(&msg, stats[i].long_name);
-		encode_attrib(&msg, &stats[i].attrib);
-	}
-	send_msg(&msg);
-	buffer_free(&msg);
-}
-
-static void
-send_attrib(u_int32_t id, const Attrib *a)
-{
-	Buffer msg;
-
-	debug("request %u: sent attrib have 0x%x", id, a->flags);
-	buffer_init(&msg);
-	buffer_put_char(&msg, SSH2_FXP_ATTRS);
-	buffer_put_int(&msg, id);
-	encode_attrib(&msg, a);
-	send_msg(&msg);
-	buffer_free(&msg);
-}
-
-/* parse incoming */
-
-static void
-process_init(void)
-{
-	Buffer msg;
-
-	version = get_int();
-	verbose("received client version %d", version);
-	buffer_init(&msg);
-	buffer_put_char(&msg, SSH2_FXP_VERSION);
-	buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
-	send_msg(&msg);
-	buffer_free(&msg);
-}
-
-static void
-process_open(void)
-{
-	u_int32_t id, pflags;
-	Attrib *a;
-	char *name;
-	int handle, fd, flags, mode, status = SSH2_FX_FAILURE;
-
-	id = get_int();
-	name = get_string(NULL);
-	pflags = get_int();		/* portable flags */
-	debug3("request %u: open flags %d", id, pflags);
-	a = get_attrib();
-	flags = flags_from_portable(pflags);
-	mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666;
-	log("open \"%s\" flags %s mode 0%o",
-	    name, string_from_portable(pflags), mode);
-	fd = open(name, flags, mode);
-	if (fd < 0) {
-		status = errno_to_portable(errno);
-	} else {
-		handle = handle_new(HANDLE_FILE, name, fd, NULL);
-		if (handle < 0) {
-			close(fd);
-		} else {
-			send_handle(id, handle);
-			status = SSH2_FX_OK;
-		}
-	}
-	if (status != SSH2_FX_OK)
-		send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_close(void)
-{
-	u_int32_t id;
-	int handle, ret, status = SSH2_FX_FAILURE;
-
-	id = get_int();
-	handle = get_handle();
-	debug3("request %u: close handle %u", id, handle);
-	handle_log_close(handle, NULL);
-	ret = handle_close(handle);
-	status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
-	send_status(id, status);
-}
-
-static void
-process_read(void)
-{
-	char buf[64*1024];
-	u_int32_t id, len;
-	int handle, fd, ret, status = SSH2_FX_FAILURE;
-	u_int64_t off;
-
-	id = get_int();
-	handle = get_handle();
-	off = get_int64();
-	len = get_int();
-
-	debug("request %u: read \"%s\" (handle %d) off %llu len %d",
-	    id, handle_to_name(handle), handle, (unsigned long long)off, len);
-	if (len > sizeof buf) {
-		len = sizeof buf;
-		debug2("read change len %d", len);
-	}
-	fd = handle_to_fd(handle);
-	if (fd >= 0) {
-		if (lseek(fd, off, SEEK_SET) < 0) {
-			error("process_read: seek failed");
-			status = errno_to_portable(errno);
-		} else {
-			ret = read(fd, buf, len);
-			if (ret < 0) {
-				status = errno_to_portable(errno);
-			} else if (ret == 0) {
-				status = SSH2_FX_EOF;
-			} else {
-				send_data(id, buf, ret);
-				status = SSH2_FX_OK;
-				handle_update_read(handle, ret);
-			}
-		}
-	}
-	if (status != SSH2_FX_OK)
-		send_status(id, status);
-}
-
-static void
-process_write(void)
-{
-	u_int32_t id;
-	u_int64_t off;
-	u_int len;
-	int handle, fd, ret, status = SSH2_FX_FAILURE;
-	char *data;
-
-	id = get_int();
-	handle = get_handle();
-	off = get_int64();
-	data = get_string(&len);
-
-	debug("request %u: write \"%s\" (handle %d) off %llu len %d",
-	    id, handle_to_name(handle), handle, (unsigned long long)off, len);
-	fd = handle_to_fd(handle);
-	if (fd >= 0) {
-		if (lseek(fd, off, SEEK_SET) < 0) {
-			status = errno_to_portable(errno);
-			error("process_write: seek failed");
-		} else {
-/* XXX ATOMICIO ? */
-			ret = write(fd, data, len);
-			if (ret < 0) {
-				error("process_write: write failed");
-				status = errno_to_portable(errno);
-			} else if ((size_t)ret == len) {
-				status = SSH2_FX_OK;
-				handle_update_write(handle, ret);
-			} else {
-				debug2("nothing at all written");
-			}
-		}
-	}
-	send_status(id, status);
-	xfree(data);
-}
-
-static void
-process_do_stat(int do_lstat)
-{
-	Attrib a;
-	struct stat st;
-	u_int32_t id;
-	char *name;
-	int ret, status = SSH2_FX_FAILURE;
-
-	id = get_int();
-	name = get_string(NULL);
-	debug3("request %u: %sstat", id, do_lstat ? "l" : "");
-	verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name);
-	ret = do_lstat ? lstat(name, &st) : stat(name, &st);
-	if (ret < 0) {
-		status = errno_to_portable(errno);
-	} else {
-		stat_to_attrib(&st, &a);
-		send_attrib(id, &a);
-		status = SSH2_FX_OK;
-	}
-	if (status != SSH2_FX_OK)
-		send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_stat(void)
-{
-	process_do_stat(0);
-}
-
-static void
-process_lstat(void)
-{
-	process_do_stat(1);
-}
-
-static void
-process_fstat(void)
-{
-	Attrib a;
-	struct stat st;
-	u_int32_t id;
-	int fd, ret, handle, status = SSH2_FX_FAILURE;
-
-	id = get_int();
-	handle = get_handle();
-	debug("request %u: fstat \"%s\" (handle %u)",
-	    id, handle_to_name(handle), handle);
-	fd = handle_to_fd(handle);
-	if (fd >= 0) {
-		ret = fstat(fd, &st);
-		if (ret < 0) {
-			status = errno_to_portable(errno);
-		} else {
-			stat_to_attrib(&st, &a);
-			send_attrib(id, &a);
-			status = SSH2_FX_OK;
-		}
-	}
-	if (status != SSH2_FX_OK)
-		send_status(id, status);
-}
-
-static struct timeval *
-attrib_to_tv(const Attrib *a)
-{
-	static struct timeval tv[2];
-
-	tv[0].tv_sec = a->atime;
-	tv[0].tv_usec = 0;
-	tv[1].tv_sec = a->mtime;
-	tv[1].tv_usec = 0;
-	return tv;
-}
-
-static void
-process_setstat(void)
-{
-	Attrib *a;
-	u_int32_t id;
-	char *name;
-	int status = SSH2_FX_OK, ret;
-
-	id = get_int();
-	name = get_string(NULL);
-	a = get_attrib();
-	debug("request %u: setstat name \"%s\"", id, name);
-	if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
-		log("set \"%s\" size %llu",
-		    name, (unsigned long long)a->size);
-		ret = truncate(name, a->size);
-		if (ret == -1)
-			status = errno_to_portable(errno);
-	}
-	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
-		log("set \"%s\" mode %04o", name, a->perm);
-		ret = chmod(name, a->perm & 07777);
-		if (ret == -1)
-			status = errno_to_portable(errno);
-	}
-	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
-		char buf[64];
-		time_t t = a->mtime;
-
-		strftime(buf, sizeof(buf), "%Y" "%m%d-%H:%M:%S",
-		    localtime(&t));
-		log("set \"%s\" modtime %s", name, buf);
-		ret = utimes(name, attrib_to_tv(a));
-		if (ret == -1)
-			status = errno_to_portable(errno);
-	}
-	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
-		log("set \"%s\" owner %lu group %lu", name,
-		    (u_long)a->uid, (u_long)a->gid);
-		ret = chown(name, a->uid, a->gid);
-		if (ret == -1)
-			status = errno_to_portable(errno);
-	}
-	send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_fsetstat(void)
-{
-	Attrib *a;
-	u_int32_t id;
-	int handle, fd, ret;
-	int status = SSH2_FX_OK;
-
-	id = get_int();
-	handle = get_handle();
-	a = get_attrib();
-	debug("request %u: fsetstat handle %d", id, handle);
-	fd = handle_to_fd(handle);
-	if (fd < 0) {
-		status = SSH2_FX_FAILURE;
-	} else {
-		char *name = handle_to_name(handle);
-
-		if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
-			log("set \"%s\" size %llu",
-			    name, (unsigned long long)a->size);
-			ret = ftruncate(fd, a->size);
-			if (ret == -1)
-				status = errno_to_portable(errno);
-		}
-		if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
-			log("set \"%s\" mode %04o", name, a->perm);
-#ifdef HAVE_FCHMOD
-			ret = fchmod(fd, a->perm & 07777);
-#else
-			ret = chmod(name, a->perm & 07777);
-#endif
-			if (ret == -1)
-				status = errno_to_portable(errno);
-		}
-		if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
-			char buf[64];
-			time_t t = a->mtime;
-
-			strftime(buf, sizeof(buf), "%Y" "%m%d-%H:%M:%S",
-			    localtime(&t));
-			log("set \"%s\" modtime %s", name, buf);
-#ifdef HAVE_FUTIMES
-			ret = futimes(fd, attrib_to_tv(a));
-#else
-			ret = utimes(name, attrib_to_tv(a));
-#endif
-			if (ret == -1)
-				status = errno_to_portable(errno);
-		}
-		if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
-			log("set \"%s\" owner %lu group %lu", name,
-			    (u_long)a->uid, (u_long)a->gid);
-#ifdef HAVE_FCHOWN
-			ret = fchown(fd, a->uid, a->gid);
-#else
-			ret = chown(name, a->uid, a->gid);
-#endif
-			if (ret == -1)
-				status = errno_to_portable(errno);
-		}
-	}
-	send_status(id, status);
-}
-
-static void
-process_opendir(void)
-{
-	DIR *dirp = NULL;
-	char *path;
-	int handle, status = SSH2_FX_FAILURE;
-	u_int32_t id;
-
-	id = get_int();
-	path = get_string(NULL);
-	debug3("request %u: opendir", id);
-	log("opendir \"%s\"", path);
-	dirp = opendir(path);
-	if (dirp == NULL) {
-		status = errno_to_portable(errno);
-	} else {
-		handle = handle_new(HANDLE_DIR, path, 0, dirp);
-		if (handle < 0) {
-			closedir(dirp);
-		} else {
-			send_handle(id, handle);
-			status = SSH2_FX_OK;
-		}
-
-	}
-	if (status != SSH2_FX_OK)
-		send_status(id, status);
-	xfree(path);
-}
-
-static void
-process_readdir(void)
-{
-	DIR *dirp;
-	struct dirent *dp;
-	char *path;
-	int handle;
-	u_int32_t id;
-
-	id = get_int();
-	handle = get_handle();
-	debug("request %u: readdir \"%s\" (handle %d)", id,
-	    handle_to_name(handle), handle);
-	dirp = handle_to_dir(handle);
-	path = handle_to_name(handle);
-	if (dirp == NULL || path == NULL) {
-		send_status(id, SSH2_FX_FAILURE);
-	} else {
-		struct stat st;
-		char pathname[MAXPATHLEN];
-		Stat *stats;
-		int nstats = 10, count = 0, i;
-
-		stats = xcalloc(nstats, sizeof(Stat));
-		while ((dp = readdir(dirp)) != NULL) {
-			if (count >= nstats) {
-				nstats *= 2;
-				stats = xrealloc(stats, nstats * sizeof(Stat));
-			}
-/* XXX OVERFLOW ? */
-			snprintf(pathname, sizeof pathname, "%s%s%s", path,
-			    strcmp(path, "/") ? "/" : "", dp->d_name);
-			if (lstat(pathname, &st) < 0)
-				continue;
-			stat_to_attrib(&st, &(stats[count].attrib));
-			stats[count].name = xstrdup(dp->d_name);
-			stats[count].long_name = ls_file(dp->d_name, &st, 0);
-			count++;
-			/* send up to 100 entries in one message */
-			/* XXX check packet size instead */
-			if (count == 100)
-				break;
-		}
-		if (count > 0) {
-			send_names(id, count, stats);
-			for (i = 0; i < count; i++) {
-				xfree(stats[i].name);
-				xfree(stats[i].long_name);
-			}
-		} else {
-			send_status(id, SSH2_FX_EOF);
-		}
-		xfree(stats);
-	}
-}
-
-static void
-process_remove(void)
-{
-	char *name;
-	u_int32_t id;
-	int status = SSH2_FX_FAILURE;
-	int ret;
-
-	id = get_int();
-	name = get_string(NULL);
-	debug3("request %u: remove", id);
-	log("remove name \"%s\"", name);
-	ret = unlink(name);
-	status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
-	send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_mkdir(void)
-{
-	Attrib *a;
-	u_int32_t id;
-	char *name;
-	int ret, mode, status = SSH2_FX_FAILURE;
-
-	id = get_int();
-	name = get_string(NULL);
-	a = get_attrib();
-	mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
-	    a->perm & 0777 : 0777;
-	debug3("request %u: mkdir", id);
-	log("mkdir name \"%s\" mode 0%o", name, mode);
-	ret = mkdir(name, mode);
-	status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
-	send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_rmdir(void)
-{
-	u_int32_t id;
-	char *name;
-	int ret, status;
-
-	id = get_int();
-	name = get_string(NULL);
-	debug3("request %u: rmdir", id);
-	log("rmdir name \"%s\"", name);
-	ret = rmdir(name);
-	status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
-	send_status(id, status);
-	xfree(name);
-}
-
-static void
-process_realpath(void)
-{
-	char resolvedname[MAXPATHLEN];
-	u_int32_t id;
-	char *path;
-
-	id = get_int();
-	path = get_string(NULL);
-	if (path[0] == '\0') {
-		xfree(path);
-		path = xstrdup(".");
-	}
-	debug3("request %u: realpath", id);
-	verbose("realpath \"%s\"", path);
-	if (realpath(path, resolvedname) == NULL) {
-		send_status(id, errno_to_portable(errno));
-	} else {
-		Stat s;
-		attrib_clear(&s.attrib);
-		s.name = s.long_name = resolvedname;
-		send_names(id, 1, &s);
-	}
-	xfree(path);
-}
-
-static void
-process_rename(void)
-{
-	u_int32_t id;
-	char *oldpath, *newpath;
-	int status;
-	struct stat sb;
-
-	id = get_int();
-	oldpath = get_string(NULL);
-	newpath = get_string(NULL);
-	debug3("request %u: rename", id);
-	log("rename old \"%s\" new \"%s\"", oldpath, newpath);
-	status = SSH2_FX_FAILURE;
-	if (lstat(oldpath, &sb) == -1)
-		status = errno_to_portable(errno);
-	else if (S_ISREG(sb.st_mode)) {
-		/* Race-free rename of regular files */
-		if (link(oldpath, newpath) == -1) {
-			if (errno == EOPNOTSUPP
-#ifdef LINK_OPNOTSUPP_ERRNO
-			    || errno == LINK_OPNOTSUPP_ERRNO
-#endif
-			    ) {
-				struct stat st;
-
-				/*
-				 * fs doesn't support links, so fall back to
-				 * stat+rename.  This is racy.
-				 */
-				if (stat(newpath, &st) == -1) {
-					if (rename(oldpath, newpath) == -1)
-						status =
-						    errno_to_portable(errno);
-					else
-						status = SSH2_FX_OK;
-				}
-			} else {
-				status = errno_to_portable(errno);
-			}
-		} else if (unlink(oldpath) == -1) {
-			status = errno_to_portable(errno);
-			/* clean spare link */
-			unlink(newpath);
-		} else
-			status = SSH2_FX_OK;
-	} else if (stat(newpath, &sb) == -1) {
-		if (rename(oldpath, newpath) == -1)
-			status = errno_to_portable(errno);
-		else
-			status = SSH2_FX_OK;
-	}
-	send_status(id, status);
-	xfree(oldpath);
-	xfree(newpath);
-}
-
-static void
-process_readlink(void)
-{
-	u_int32_t id;
-	int len;
-	char buf[MAXPATHLEN];
-	char *path;
-
-	id = get_int();
-	path = get_string(NULL);
-	debug3("request %u: readlink", id);
-	verbose("readlink \"%s\"", path);
-	if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1)
-		send_status(id, errno_to_portable(errno));
-	else {
-		Stat s;
-
-		buf[len] = '\0';
-		attrib_clear(&s.attrib);
-		s.name = s.long_name = buf;
-		send_names(id, 1, &s);
-	}
-	xfree(path);
-}
-
-static void
-process_symlink(void)
-{
-	u_int32_t id;
-	char *oldpath, *newpath;
-	int ret, status;
-
-	id = get_int();
-	oldpath = get_string(NULL);
-	newpath = get_string(NULL);
-	debug3("request %u: symlink", id);
-	log("symlink old \"%s\" new \"%s\"", oldpath, newpath);
-	/* this will fail if 'newpath' exists */
-	ret = symlink(oldpath, newpath);
-	status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
-	send_status(id, status);
-	xfree(oldpath);
-	xfree(newpath);
-}
-
-static void
-process_extended(void)
-{
-	u_int32_t id;
-	char *request;
-
-	id = get_int();
-	request = get_string(NULL);
-	send_status(id, SSH2_FX_OP_UNSUPPORTED);		/* MUST */
-	xfree(request);
-}
-
-/* stolen from ssh-agent */
-
-static void
-process(void)
-{
-	u_int msg_len;
-	u_int buf_len;
-	u_int consumed;
-	u_int type;
-	u_char *cp;
-
-	buf_len = buffer_len(&iqueue);
-	if (buf_len < 5)
-		return;		/* Incomplete message. */
-	cp = buffer_ptr(&iqueue);
-	msg_len = get_u32(cp);
-	if (msg_len > SFTP_MAX_MSG_LENGTH) {
-		error("bad message from %s local user %s",
-		    client_addr, pw->pw_name);
-		cleanup_exit(11);
-	}
-	if (buf_len < msg_len + 4)
-		return;
-	buffer_consume(&iqueue, 4);
-	buf_len -= 4;
-	type = buffer_get_char(&iqueue);
-	switch (type) {
-	case SSH2_FXP_INIT:
-		process_init();
-		break;
-	case SSH2_FXP_OPEN:
-		process_open();
-		break;
-	case SSH2_FXP_CLOSE:
-		process_close();
-		break;
-	case SSH2_FXP_READ:
-		process_read();
-		break;
-	case SSH2_FXP_WRITE:
-		process_write();
-		break;
-	case SSH2_FXP_LSTAT:
-		process_lstat();
-		break;
-	case SSH2_FXP_FSTAT:
-		process_fstat();
-		break;
-	case SSH2_FXP_SETSTAT:
-		process_setstat();
-		break;
-	case SSH2_FXP_FSETSTAT:
-		process_fsetstat();
-		break;
-	case SSH2_FXP_OPENDIR:
-		process_opendir();
-		break;
-	case SSH2_FXP_READDIR:
-		process_readdir();
-		break;
-	case SSH2_FXP_REMOVE:
-		process_remove();
-		break;
-	case SSH2_FXP_MKDIR:
-		process_mkdir();
-		break;
-	case SSH2_FXP_RMDIR:
-		process_rmdir();
-		break;
-	case SSH2_FXP_REALPATH:
-		process_realpath();
-		break;
-	case SSH2_FXP_STAT:
-		process_stat();
-		break;
-	case SSH2_FXP_RENAME:
-		process_rename();
-		break;
-	case SSH2_FXP_READLINK:
-		process_readlink();
-		break;
-	case SSH2_FXP_SYMLINK:
-		process_symlink();
-		break;
-	case SSH2_FXP_EXTENDED:
-		process_extended();
-		break;
-	default:
-		error("Unknown message %d", type);
-		break;
-	}
-	/* discard the remaining bytes from the current packet */
-	if (buf_len < buffer_len(&iqueue))
-		fatal("iqueue grew unexpectedly");
-	consumed = buf_len - buffer_len(&iqueue);
-	if (msg_len < consumed)
-		fatal("msg_len %d < consumed %d", msg_len, consumed);
-	if (msg_len > consumed)
-		buffer_consume(&iqueue, msg_len - consumed);
-}
-
-/*
- * Cleanup handler that logs active handles upon normal exit. Not static since
- * sftp-server-main.c file needs that as well.
- */
-void
-cleanup_exit(int i)
-{
-	if (pw != NULL && client_addr != NULL) {
-		handle_log_exit();
-		log("session closed for local user %s from [%s]",
-		    pw->pw_name, client_addr);
-	}
-	_exit(i);
-}
-
-static void
-usage(void)
-{
-	fprintf(stderr,
-	    "Usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname);
-	exit(1);
-}
-
-int
-sftp_server_main(int argc, char **argv, struct passwd *user_pw)
-{
-	fd_set *rset, *wset;
-	int in, out, max, ch, skipargs = 0, log_stderr = 0;
-	ssize_t len, olen, set_size;
-	SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
-	char *cp, buf[4*4096];
-
-	extern char *optarg;
-
-	__progname = get_progname(argv[0]);
-
-	(void) g11n_setlocale(LC_ALL, "");
-
-	log_init(__progname, log_level, log_facility, log_stderr);
-
-	while (!skipargs && (ch = getopt(argc, argv, "C:f:l:che")) != -1) {
-		switch (ch) {
-		case 'c':
-			/*
-			 * Ignore all arguments if we are invoked as a
-			 * shell using "sftp-server -c command"
-			 */
-			skipargs = 1;
-			break;
-		case 'e':
-			log_stderr = 1;
-			break;
-		case 'l':
-			log_level = log_level_number(optarg);
-			if (log_level == SYSLOG_LEVEL_NOT_SET)
-				error("Invalid log level \"%s\"", optarg);
-			break;
-		case 'f':
-			log_facility = log_facility_number(optarg);
-			if (log_facility == SYSLOG_FACILITY_NOT_SET)
-				error("Invalid log facility \"%s\"", optarg);
-			break;
-		case 'h':
-		default:
-			usage();
-		}
-	}
-
-	log_init(__progname, log_level, log_facility, log_stderr);
-
-	if ((cp = getenv("SSH_CONNECTION")) != NULL) {
-		client_addr = xstrdup(cp);
-		if ((cp = strchr(client_addr, ' ')) == NULL)
-			fatal("Malformed SSH_CONNECTION variable: \"%s\"",
-			    getenv("SSH_CONNECTION"));
-		*cp = '\0';
-	} else
-		client_addr = xstrdup("UNKNOWN");
-
-	pw = pwcopy(user_pw);
-
-	log("session opened for local user %s from [%s]",
-	    pw->pw_name, client_addr);
-
-	handle_init();
-
-	in = dup(STDIN_FILENO);
-	out = dup(STDOUT_FILENO);
-
-#ifdef HAVE_CYGWIN
-	setmode(in, O_BINARY);
-	setmode(out, O_BINARY);
-#endif
-
-	max = 0;
-	if (in > max)
-		max = in;
-	if (out > max)
-		max = out;
-
-	buffer_init(&iqueue);
-	buffer_init(&oqueue);
-
-	set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask);
-	rset = (fd_set *)xmalloc(set_size);
-	wset = (fd_set *)xmalloc(set_size);
-
-	for (;;) {
-		memset(rset, 0, set_size);
-		memset(wset, 0, set_size);
-
-		/*
-		 * Ensure that we can read a full buffer and handle
-		 * the worst-case length packet it can generate,
-		 * otherwise apply backpressure by stopping reads.
-		 */
-		if (buffer_check_alloc(&iqueue, sizeof(buf)) &&
-		    buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH))
-			FD_SET(in, rset);
-
-		olen = buffer_len(&oqueue);
-		if (olen > 0)
-			FD_SET(out, wset);
-
-		if (select(max+1, rset, wset, NULL, NULL) < 0) {
-			if (errno == EINTR)
-				continue;
-			error("select: %s", strerror(errno));
-			cleanup_exit(2);
-		}
-
-		/* copy stdin to iqueue */
-		if (FD_ISSET(in, rset)) {
-			len = read(in, buf, sizeof buf);
-			if (len == 0) {
-				debug("read eof");
-				cleanup_exit(0);
-			} else if (len < 0) {
-				error("read: %s", strerror(errno));
-				cleanup_exit(1);
-			} else {
-				buffer_append(&iqueue, buf, len);
-			}
-		}
-		/* send oqueue to stdout */
-		if (FD_ISSET(out, wset)) {
-			len = write(out, buffer_ptr(&oqueue), olen);
-			if (len < 0) {
-				error("write: %s", strerror(errno));
-				cleanup_exit(1);
-			} else {
-				buffer_consume(&oqueue, len);
-			}
-		}
-
-		/*
-		 * Process requests from client if we can fit the results
-		 * into the output buffer, otherwise stop processing input
-		 * and let the output queue drain.
-		 */
-		if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH))
-			process();
-	}
-
-	/* NOTREACHED */
-	return (0);
-}
