20000905
- (djm) Import OpenBSD CVS changes
- markus@cvs.openbsd.org 2000/08/31 15:52:24
[Makefile sshd.8 sshd_config sftp-server.8 sftp-server.c]
implement a SFTP server. interops with sftp2, scp2 and the windows
client from ssh.com
- markus@cvs.openbsd.org 2000/08/31 15:56:03
[README.openssh2]
sync
- markus@cvs.openbsd.org 2000/08/31 16:05:42
[session.c]
Wall
- markus@cvs.openbsd.org 2000/08/31 16:09:34
[authfd.c ssh-agent.c]
add a flag to SSH2_AGENTC_SIGN_REQUEST for future extensions
- deraadt@cvs.openbsd.org 2000/09/01 09:25:13
[scp.1 scp.c]
cleanup and fix -S support; stevesk@sweden.hp.com
- markus@cvs.openbsd.org 2000/09/01 16:29:32
[sftp-server.c]
portability fixes
- markus@cvs.openbsd.org 2000/09/01 16:32:41
[sftp-server.c]
fix cast; mouring@pconline.com
- itojun@cvs.openbsd.org 2000/09/03 09:23:28
[ssh-add.1 ssh.1]
add missing .El against .Bl.
- markus@cvs.openbsd.org 2000/09/04 13:03:41
[session.c]
missing close; ok theo
- markus@cvs.openbsd.org 2000/09/04 13:07:21
[session.c]
fix get_last_login_time order; from andre@van-veen.de
- markus@cvs.openbsd.org 2000/09/04 13:10:09
[sftp-server.c]
more cast fixes; from mouring@pconline.com
- markus@cvs.openbsd.org 2000/09/04 13:06:04
[session.c]
set SSH_ORIGINAL_COMMAND; from Leakin@dfw.nostrum.com, bet@rahul.net
- (djm) Cleanup after import. Fix sftp-server compilation, Makefile
diff --git a/sftp-server.c b/sftp-server.c
new file mode 100644
index 0000000..39cecac
--- /dev/null
+++ b/sftp-server.c
@@ -0,0 +1,1078 @@
+/*
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Markus Friedl.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "includes.h"
+RCSID("$OpenBSD: sftp-server.c,v 1.4 2000/09/04 19:10:08 markus Exp $");
+
+#include "ssh.h"
+#include "buffer.h"
+#include "bufaux.h"
+#include "getput.h"
+#include "xmalloc.h"
+
+/* version */
+#define SSH_FILEXFER_VERSION 2
+
+/* client to server */
+#define SSH_FXP_INIT 1
+#define SSH_FXP_OPEN 3
+#define SSH_FXP_CLOSE 4
+#define SSH_FXP_READ 5
+#define SSH_FXP_WRITE 6
+#define SSH_FXP_LSTAT 7
+#define SSH_FXP_FSTAT 8
+#define SSH_FXP_SETSTAT 9
+#define SSH_FXP_FSETSTAT 10
+#define SSH_FXP_OPENDIR 11
+#define SSH_FXP_READDIR 12
+#define SSH_FXP_REMOVE 13
+#define SSH_FXP_MKDIR 14
+#define SSH_FXP_RMDIR 15
+#define SSH_FXP_REALPATH 16
+#define SSH_FXP_STAT 17
+#define SSH_FXP_RENAME 18
+
+/* server to client */
+#define SSH_FXP_VERSION 2
+#define SSH_FXP_STATUS 101
+#define SSH_FXP_HANDLE 102
+#define SSH_FXP_DATA 103
+#define SSH_FXP_NAME 104
+#define SSH_FXP_ATTRS 105
+
+/* portable open modes */
+#define SSH_FXF_READ 0x01
+#define SSH_FXF_WRITE 0x02
+#define SSH_FXF_APPEND 0x04
+#define SSH_FXF_CREAT 0x08
+#define SSH_FXF_TRUNC 0x10
+#define SSH_FXF_EXCL 0x20
+
+/* attributes */
+#define SSH_FXA_HAVE_SIZE 0x01
+#define SSH_FXA_HAVE_UGID 0x02
+#define SSH_FXA_HAVE_PERM 0x04
+#define SSH_FXA_HAVE_TIME 0x08
+
+/* status messages */
+#define SSH_FX_OK 0x00
+#define SSH_FX_EOF 0x01
+#define SSH_FX_NO_SUCH_FILE 0x02
+#define SSH_FX_PERMISSION_DENIED 0x03
+#define SSH_FX_FAILURE 0x04
+#define SSH_FX_BAD_MESSAGE 0x05
+#define SSH_FX_NO_CONNECTION 0x06
+#define SSH_FX_CONNECTION_LOST 0x07
+
+
+/* helper */
+#define get_int() buffer_get_int(&iqueue);
+#define get_string(lenp) buffer_get_string(&iqueue, lenp);
+#define TRACE log
+
+/* input and output queue */
+Buffer iqueue;
+Buffer oqueue;
+
+/* portable attibutes, etc. */
+
+typedef struct Attrib Attrib;
+typedef struct Stat Stat;
+
+struct Attrib
+{
+ u_int32_t flags;
+ u_int32_t size_high;
+ u_int32_t size_low;
+ u_int64_t size;
+ u_int32_t uid;
+ u_int32_t gid;
+ u_int32_t perm;
+ u_int32_t atime;
+ u_int32_t mtime;
+};
+
+struct Stat
+{
+ char *name;
+ char *long_name;
+ Attrib attrib;
+};
+
+int
+errno_to_portable(int unixerrno)
+{
+ int ret = 0;
+ switch (unixerrno) {
+ case 0:
+ ret = SSH_FX_OK;
+ break;
+ case ENOENT:
+ case ENOTDIR:
+ case EBADF:
+ case ELOOP:
+ ret = SSH_FX_NO_SUCH_FILE;
+ break;
+ case EPERM:
+ case EACCES:
+ case EFAULT:
+ ret = SSH_FX_PERMISSION_DENIED;
+ break;
+ case ENAMETOOLONG:
+ case EINVAL:
+ ret = SSH_FX_BAD_MESSAGE;
+ break;
+ default:
+ ret = SSH_FX_FAILURE;
+ break;
+ }
+ return ret;
+}
+
+int
+flags_from_portable(int pflags)
+{
+ int flags = 0;
+ if (pflags & SSH_FXF_READ &&
+ pflags & SSH_FXF_WRITE) {
+ flags = O_RDWR;
+ } else if (pflags & SSH_FXF_READ) {
+ flags = O_RDONLY;
+ } else if (pflags & SSH_FXF_WRITE) {
+ flags = O_WRONLY;
+ }
+ if (pflags & SSH_FXF_CREAT)
+ flags |= O_CREAT;
+ if (pflags & SSH_FXF_TRUNC)
+ flags |= O_TRUNC;
+ if (pflags & SSH_FXF_EXCL)
+ flags |= O_EXCL;
+ return flags;
+}
+
+void
+attrib_clear(Attrib *a)
+{
+ a->flags = 0;
+ a->size_low = 0;
+ a->size_high = 0;
+ a->size = 0;
+ a->uid = 0;
+ a->gid = 0;
+ a->perm = 0;
+ a->atime = 0;
+ a->mtime = 0;
+}
+
+Attrib *
+decode_attrib(Buffer *b)
+{
+ static Attrib a;
+ attrib_clear(&a);
+ a.flags = get_int();
+ if (a.flags & SSH_FXA_HAVE_SIZE) {
+ a.size_high = get_int();
+ a.size_low = get_int();
+ a.size = (((u_int64_t) a.size_high) << 32) + a.size_low;
+ }
+ if (a.flags & SSH_FXA_HAVE_UGID) {
+ a.uid = get_int();
+ a.gid = get_int();
+ }
+ if (a.flags & SSH_FXA_HAVE_PERM) {
+ a.perm = get_int();
+ }
+ if (a.flags & SSH_FXA_HAVE_TIME) {
+ a.atime = get_int();
+ a.mtime = get_int();
+ }
+ return &a;
+}
+
+void
+encode_attrib(Buffer *b, Attrib *a)
+{
+ buffer_put_int(b, a->flags);
+ if (a->flags & SSH_FXA_HAVE_SIZE) {
+ buffer_put_int(b, a->size_high);
+ buffer_put_int(b, a->size_low);
+ }
+ if (a->flags & SSH_FXA_HAVE_UGID) {
+ buffer_put_int(b, a->uid);
+ buffer_put_int(b, a->gid);
+ }
+ if (a->flags & SSH_FXA_HAVE_PERM) {
+ buffer_put_int(b, a->perm);
+ }
+ if (a->flags & SSH_FXA_HAVE_TIME) {
+ buffer_put_int(b, a->atime);
+ buffer_put_int(b, a->mtime);
+ }
+}
+
+Attrib *
+stat_to_attrib(struct stat *st)
+{
+ static Attrib a;
+ attrib_clear(&a);
+ a.flags = 0;
+ a.flags |= SSH_FXA_HAVE_SIZE;
+ a.size = st->st_size;
+ a.size_low = a.size;
+ a.size_high = (u_int32_t) (a.size >> 32);
+ a.flags |= SSH_FXA_HAVE_UGID;
+ a.uid = st->st_uid;
+ a.gid = st->st_gid;
+ a.flags |= SSH_FXA_HAVE_PERM;
+ a.perm = st->st_mode;
+ a.flags |= SSH_FXA_HAVE_TIME;
+ a.atime = st->st_atime;
+ a.mtime = st->st_mtime;
+ return &a;
+}
+
+Attrib *
+get_attrib(void)
+{
+ return decode_attrib(&iqueue);
+}
+
+/* handle handles */
+
+typedef struct Handle Handle;
+struct Handle {
+ int use;
+ DIR *dirp;
+ int fd;
+ char *name;
+};
+enum {
+ HANDLE_UNUSED,
+ HANDLE_DIR,
+ HANDLE_FILE
+};
+Handle handles[100];
+
+void
+handle_init(void)
+{
+ int i;
+ for(i = 0; i < sizeof(handles)/sizeof(Handle); i++)
+ handles[i].use = HANDLE_UNUSED;
+}
+
+int
+handle_new(int use, char *name, int fd, DIR *dirp)
+{
+ 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 = name;
+ return i;
+ }
+ }
+ return -1;
+}
+
+int
+handle_is_ok(int i, int type)
+{
+ return i >= 0 && i < sizeof(handles)/sizeof(Handle) && handles[i].use == type;
+}
+
+int
+handle_to_string(int handle, char **stringp, int *hlenp)
+{
+ char buf[1024];
+ if (stringp == NULL || hlenp == NULL)
+ return -1;
+ snprintf(buf, sizeof buf, "%d", handle);
+ *stringp = xstrdup(buf);
+ *hlenp = strlen(*stringp);
+ return 0;
+}
+
+int
+handle_from_string(char *handle, int hlen)
+{
+/* XXX OVERFLOW ? */
+ char *ep;
+ long lval = strtol(handle, &ep, 10);
+ int val = lval;
+ if (*ep != '\0')
+ return -1;
+ if (handle_is_ok(val, HANDLE_FILE) ||
+ handle_is_ok(val, HANDLE_DIR))
+ return val;
+ return -1;
+}
+
+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;
+}
+
+DIR *
+handle_to_dir(int handle)
+{
+ if (handle_is_ok(handle, HANDLE_DIR))
+ return handles[handle].dirp;
+ return NULL;
+}
+
+int
+handle_to_fd(int handle)
+{
+ if (handle_is_ok(handle, HANDLE_FILE))
+ return handles[handle].fd;
+ return -1;
+}
+
+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;
+ } else if (handle_is_ok(handle, HANDLE_DIR)) {
+ ret = closedir(handles[handle].dirp);
+ handles[handle].use = HANDLE_UNUSED;
+ } else {
+ errno = ENOENT;
+ }
+ return ret;
+}
+
+int
+get_handle(void)
+{
+ char *handle;
+ int hlen, val;
+ handle = get_string(&hlen);
+ val = handle_from_string(handle, hlen);
+ xfree(handle);
+ return val;
+}
+
+/* send replies */
+
+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);
+}
+
+void
+send_status(u_int32_t id, u_int32_t error)
+{
+ Buffer msg;
+ TRACE("sent status id %d error %d", id, error);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH_FXP_STATUS);
+ buffer_put_int(&msg, id);
+ buffer_put_int(&msg, error);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+void
+send_data_or_handle(char type, u_int32_t id, 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);
+}
+
+void
+send_data(u_int32_t id, char *data, int dlen)
+{
+ TRACE("sent data id %d len %d", id, dlen);
+ send_data_or_handle(SSH_FXP_DATA, id, data, dlen);
+}
+
+void
+send_handle(u_int32_t id, int handle)
+{
+ char *string;
+ int hlen;
+ handle_to_string(handle, &string, &hlen);
+ TRACE("sent handle id %d handle %d", id, handle);
+ send_data_or_handle(SSH_FXP_HANDLE, id, string, hlen);
+ xfree(string);
+}
+
+void
+send_names(u_int32_t id, int count, Stat *stats)
+{
+ Buffer msg;
+ int i;
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH_FXP_NAME);
+ buffer_put_int(&msg, id);
+ buffer_put_int(&msg, count);
+ TRACE("sent names id %d 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);
+}
+
+void
+send_attrib(u_int32_t id, Attrib *a)
+{
+ Buffer msg;
+ TRACE("sent attrib id %d have 0x%x", id, a->flags);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH_FXP_ATTRS);
+ buffer_put_int(&msg, id);
+ encode_attrib(&msg, a);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+/* parse incoming */
+
+void
+process_init(void)
+{
+ Buffer msg;
+ int version = buffer_get_int(&iqueue);
+
+ TRACE("client version %d", version);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH_FXP_VERSION);
+ buffer_put_int(&msg, SSH_FILEXFER_VERSION);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+void
+process_open(void)
+{
+ u_int32_t id, pflags;
+ Attrib *a;
+ char *name;
+ int handle, fd, flags, mode, status = SSH_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ pflags = get_int();
+ a = get_attrib();
+ flags = flags_from_portable(pflags);
+ mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm : 0666;
+ TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode);
+ fd = open(name, flags, mode);
+ if (fd < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL);
+ if (handle < 0) {
+ close(fd);
+ } else {
+ send_handle(id, handle);
+ status = SSH_FX_OK;
+ }
+ }
+ if (status != SSH_FX_OK)
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_close(void)
+{
+ u_int32_t id;
+ int handle, ret, status = SSH_FX_FAILURE;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("close id %d handle %d", id, handle);
+ ret = handle_close(handle);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK;
+ send_status(id, status);
+}
+
+void
+process_read(void)
+{
+ char buf[64*1024];
+ u_int32_t id, off_high, off_low, len;
+ int handle, fd, ret, status = SSH_FX_FAILURE;
+ u_int64_t off;
+
+ id = get_int();
+ handle = get_handle();
+ off_high = get_int();
+ off_low = get_int();
+ len = get_int();
+
+ off = (((u_int64_t) off_high) << 32) + off_low;
+ TRACE("read id %d handle %d off %qd len %d", id, handle, off, len);
+ if (len > sizeof buf) {
+ len = sizeof buf;
+ log("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 = SSH_FX_EOF;
+ } else {
+ send_data(id, buf, ret);
+ status = SSH_FX_OK;
+ }
+ }
+ }
+ if (status != SSH_FX_OK)
+ send_status(id, status);
+}
+
+void
+process_write(void)
+{
+ u_int32_t id, off_high, off_low;
+ u_int64_t off;
+ int len;
+ int handle, fd, ret, status = SSH_FX_FAILURE;
+ char *data;
+
+ id = get_int();
+ handle = get_handle();
+ off_high = get_int();
+ off_low = get_int();
+ data = get_string(&len);
+
+ off = (((u_int64_t) off_high) << 32) + off_low;
+ TRACE("write id %d handle %d off %qd len %d", id, handle, 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 == -1) {
+ error("process_write: write failed");
+ status = errno_to_portable(errno);
+ } else if (ret == len) {
+ status = SSH_FX_OK;
+ } else {
+ log("nothing at all written");
+ }
+ }
+ }
+ send_status(id, status);
+ xfree(data);
+}
+
+void
+process_do_stat(int do_lstat)
+{
+ Attrib *a;
+ struct stat st;
+ u_int32_t id;
+ char *name;
+ int ret, status = SSH_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name);
+ ret = do_lstat ? lstat(name, &st) : stat(name, &st);
+ if (ret < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ a = stat_to_attrib(&st);
+ send_attrib(id, a);
+ status = SSH_FX_OK;
+ }
+ if (status != SSH_FX_OK)
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_stat(void)
+{
+ process_do_stat(0);
+}
+
+void
+process_lstat(void)
+{
+ process_do_stat(1);
+}
+
+void
+process_fstat(void)
+{
+ Attrib *a;
+ struct stat st;
+ u_int32_t id;
+ int fd, ret, handle, status = SSH_FX_FAILURE;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("fstat id %d handle %d", id, handle);
+ fd = handle_to_fd(handle);
+ if (fd >= 0) {
+ ret = fstat(fd, &st);
+ if (ret < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ a = stat_to_attrib(&st);
+ send_attrib(id, a);
+ status = SSH_FX_OK;
+ }
+ }
+ if (status != SSH_FX_OK)
+ send_status(id, status);
+}
+
+struct timeval *
+attrib_to_tv(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;
+}
+
+void
+process_setstat(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ char *name;
+ int ret;
+ int status = SSH_FX_OK;
+
+ id = get_int();
+ name = get_string(NULL);
+ a = get_attrib();
+ TRACE("setstat id %d name %s", id, name);
+ if (a->flags & SSH_FXA_HAVE_PERM) {
+ ret = chmod(name, a->perm & 0777);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH_FXA_HAVE_TIME) {
+ ret = utimes(name, attrib_to_tv(a));
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_fsetstat(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ int handle, fd, ret;
+ int status = SSH_FX_OK;
+ char *name = NULL;
+
+ id = get_int();
+ handle = get_handle();
+ a = get_attrib();
+ TRACE("fsetstat id %d handle %d", id, handle);
+ fd = handle_to_fd(handle);
+ name = handle_to_name(handle);
+ if ((fd < 0) || (name == NULL)) {
+ status = SSH_FX_FAILURE;
+ } else {
+ if (a->flags & SSH_FXA_HAVE_PERM) {
+ ret = fchmod(fd, a->perm & 0777);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH_FXA_HAVE_TIME) {
+#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);
+ }
+ }
+ send_status(id, status);
+}
+
+void
+process_opendir(void)
+{
+ DIR *dirp = NULL;
+ char *path;
+ int handle, status = SSH_FX_FAILURE;
+ u_int32_t id;
+
+ id = get_int();
+ path = get_string(NULL);
+ TRACE("opendir id %d path %s", id, path);
+ dirp = opendir(path);
+ if (dirp == NULL) {
+ status = errno_to_portable(errno);
+ } else {
+ handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp);
+ if (handle < 0) {
+ closedir(dirp);
+ } else {
+ send_handle(id, handle);
+ status = SSH_FX_OK;
+ }
+
+ }
+ if (status != SSH_FX_OK)
+ send_status(id, status);
+ xfree(path);
+}
+
+char *
+ls_file(char *name, struct stat *st)
+{
+ char buf[1024];
+ snprintf(buf, sizeof buf, "0%o %d %d %qd %d %s",
+ st->st_mode, st->st_uid, st->st_gid, (long long)st->st_size,(int) st->st_mtime,
+ name);
+ return xstrdup(buf);
+}
+
+void
+process_readdir(void)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ char *path;
+ int handle;
+ u_int32_t id;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("readdir id %d handle %d", id, handle);
+ dirp = handle_to_dir(handle);
+ path = handle_to_name(handle);
+ if (dirp == NULL || path == NULL) {
+ send_status(id, SSH_FX_FAILURE);
+ } else {
+ Attrib *a;
+ struct stat st;
+ char pathname[1024];
+ Stat *stats;
+ int nstats = 10, count = 0, i;
+ stats = xmalloc(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", path, dp->d_name);
+ if (lstat(pathname, &st) < 0)
+ continue;
+ a = stat_to_attrib(&st);
+ stats[count].attrib = *a;
+ stats[count].name = xstrdup(dp->d_name);
+ stats[count].long_name = ls_file(dp->d_name, &st);
+ count++;
+ /* send up to 100 entries in one message */
+ if (count == 100)
+ break;
+ }
+ send_names(id, count, stats);
+ for(i = 0; i < count; i++) {
+ xfree(stats[i].name);
+ xfree(stats[i].long_name);
+ }
+ xfree(stats);
+ }
+}
+
+void
+process_remove(void)
+{
+ char *name;
+ u_int32_t id;
+ int status = SSH_FX_FAILURE;
+ int ret;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("remove id %d name %s", id, name);
+ ret = remove(name);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_mkdir(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ char *name;
+ int ret, mode, status = SSH_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ a = get_attrib();
+ mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm & 0777 : 0777;
+ TRACE("mkdir id %d name %s mode 0%o", id, name, mode);
+ ret = mkdir(name, mode);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_rmdir(void)
+{
+ u_int32_t id;
+ char *name;
+ int ret, status;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("rmdir id %d name %s", id, name);
+ ret = rmdir(name);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+void
+process_realpath(void)
+{
+ char resolvedname[MAXPATHLEN];
+ u_int32_t id;
+ char *path;
+
+ id = get_int();
+ path = get_string(NULL);
+ TRACE("realpath id %d path %s", id, 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);
+}
+
+void
+process_rename(void)
+{
+ u_int32_t id;
+ char *oldpath, *newpath;
+ int ret, status;
+
+ id = get_int();
+ oldpath = get_string(NULL);
+ newpath = get_string(NULL);
+ TRACE("rename id %d old %s new %s", id, oldpath, newpath);
+ ret = rename(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK;
+ send_status(id, status);
+ xfree(oldpath);
+ xfree(newpath);
+}
+
+
+/* stolen from ssh-agent */
+
+void
+process(void)
+{
+ unsigned int msg_len;
+ unsigned int type;
+ unsigned char *cp;
+
+ if (buffer_len(&iqueue) < 5)
+ return; /* Incomplete message. */
+ cp = (unsigned char *) buffer_ptr(&iqueue);
+ msg_len = GET_32BIT(cp);
+ if (msg_len > 256 * 1024) {
+ error("bad message ");
+ exit(11);
+ }
+ if (buffer_len(&iqueue) < msg_len + 4)
+ return;
+ buffer_consume(&iqueue, 4);
+ type = buffer_get_char(&iqueue);
+ switch (type) {
+ case SSH_FXP_INIT:
+ process_init();
+ break;
+ case SSH_FXP_OPEN:
+ process_open();
+ break;
+ case SSH_FXP_CLOSE:
+ process_close();
+ break;
+ case SSH_FXP_READ:
+ process_read();
+ break;
+ case SSH_FXP_WRITE:
+ process_write();
+ break;
+ case SSH_FXP_LSTAT:
+ process_lstat();
+ break;
+ case SSH_FXP_FSTAT:
+ process_fstat();
+ break;
+ case SSH_FXP_SETSTAT:
+ process_setstat();
+ break;
+ case SSH_FXP_FSETSTAT:
+ process_fsetstat();
+ break;
+ case SSH_FXP_OPENDIR:
+ process_opendir();
+ break;
+ case SSH_FXP_READDIR:
+ process_readdir();
+ break;
+ case SSH_FXP_REMOVE:
+ process_remove();
+ break;
+ case SSH_FXP_MKDIR:
+ process_mkdir();
+ break;
+ case SSH_FXP_RMDIR:
+ process_rmdir();
+ break;
+ case SSH_FXP_REALPATH:
+ process_realpath();
+ break;
+ case SSH_FXP_STAT:
+ process_stat();
+ break;
+ case SSH_FXP_RENAME:
+ process_rename();
+ break;
+ default:
+ error("Unknown message %d", type);
+ break;
+ }
+}
+
+int
+main(int ac, char **av)
+{
+ fd_set rset, wset;
+ int in, out, max;
+ size_t len, olen;
+
+ handle_init();
+
+ in = dup(STDIN_FILENO);
+ out = dup(STDOUT_FILENO);
+
+ max = 0;
+ if (in > max)
+ max = in;
+ if (out > max)
+ max = out;
+
+ buffer_init(&iqueue);
+ buffer_init(&oqueue);
+
+ for (;;) {
+ FD_ZERO(&rset);
+ FD_ZERO(&wset);
+
+ 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;
+ exit(2);
+ }
+
+ /* copy stdin to iqueue */
+ if (FD_ISSET(in, &rset)) {
+ char buf[4*4096];
+ len = read(in, buf, sizeof buf);
+ if (len == 0) {
+ debug("read eof");
+ exit(0);
+ } else if (len < 0) {
+ error("read error");
+ 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 error");
+ exit(1);
+ } else {
+ buffer_consume(&oqueue, len);
+ }
+ }
+ /* process requests from client */
+ process();
+ }
+}