-/* $OpenBSD: sftp-server.c,v 1.73 2007/05/17 07:55:29 djm Exp $ */
/*
- * Copyright (c) 2000-2004 Markus Friedl. All rights reserved.
+ * Copyright (c) 2000, 2001 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.
+ * 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.
*
- * 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.
+ * 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 1.30 2001/07/31 12:42:50 jakob Exp $");
-#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 "getput.h"
#include "log.h"
-#include "misc.h"
-#include "uidswap.h"
+#include "xmalloc.h"
#include "sftp.h"
#include "sftp-common.h"
#define get_int64() buffer_get_int64(&iqueue);
#define get_int() buffer_get_int(&iqueue);
#define get_string(lenp) buffer_get_string(&iqueue, lenp);
+#define TRACE debug
-/* Our verbosity */
-LogLevel log_level = SYSLOG_LEVEL_ERROR;
-
-/* Our client */
-struct passwd *pw = NULL;
-char *client_addr = NULL;
+#ifdef HAVE___PROGNAME
+extern char *__progname;
+#else
+char *__progname;
+#endif
/* input and output queue */
Buffer iqueue;
/* Version of client */
int version;
-/* portable attributes, etc. */
+/* portable attibutes, etc. */
typedef struct Stat Stat;
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)
{
DIR *dirp;
int fd;
char *name;
- u_int64_t bytes_read, bytes_write;
};
enum {
static void
handle_init(void)
{
- u_int i;
+ int i;
- for (i = 0; i < sizeof(handles)/sizeof(Handle); 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)
+handle_new(int use, char *name, int fd, DIR *dirp)
{
- u_int i;
+ int i;
- for (i = 0; i < sizeof(handles)/sizeof(Handle); 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;
+ handles[i].name = name;
return i;
}
}
static int
handle_is_ok(int i, int type)
{
- return i >= 0 && (u_int)i < sizeof(handles)/sizeof(Handle) &&
+ return i >= 0 && i < sizeof(handles)/sizeof(Handle) &&
handles[i].use == type;
}
if (stringp == NULL || hlenp == NULL)
return -1;
*stringp = xmalloc(sizeof(int32_t));
- put_u32(*stringp, handle);
+ PUT_32BIT(*stringp, handle);
*hlenp = sizeof(int32_t);
return 0;
}
static int
-handle_from_string(const char *handle, u_int hlen)
+handle_from_string(char *handle, u_int hlen)
{
int val;
if (hlen != sizeof(int32_t))
return -1;
- val = get_u32(handle);
+ val = GET_32BIT(handle);
if (handle_is_ok(val, HANDLE_FILE) ||
handle_is_ok(val, HANDLE_DIR))
return val;
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)
{
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)) {
- logit("%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 {
- logit("%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)
{
buffer_consume(m, mlen);
}
-static const char *
-status_to_message(u_int32_t status)
+static void
+send_status(u_int32_t id, u_int32_t error)
{
+ Buffer msg;
const char *status_messages[] = {
"Success", /* SSH_FX_OK */
"End of file", /* SSH_FX_EOF */
"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))
- logit("sent status %s", status_to_message(status));
+ TRACE("sent status id %d error %d", id, error);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_STATUS);
buffer_put_int(&msg, id);
- buffer_put_int(&msg, status);
+ buffer_put_int(&msg, error);
if (version >= 3) {
- buffer_put_cstring(&msg, status_to_message(status));
+ buffer_put_cstring(&msg,
+ status_messages[MIN(error,SSH2_FX_MAX)]);
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)
+send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
{
Buffer msg;
}
static void
-send_data(u_int32_t id, const char *data, int dlen)
+send_data(u_int32_t id, char *data, int dlen)
{
- debug("request %u: sent data len %d", id, dlen);
+ TRACE("sent data id %d len %d", id, dlen);
send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
}
int hlen;
handle_to_string(handle, &string, &hlen);
- debug("request %u: sent handle handle %d", id, handle);
+ TRACE("sent handle id %d 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)
+send_names(u_int32_t id, int count, Stat *stats)
{
Buffer msg;
int i;
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);
+ 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);
}
static void
-send_attrib(u_int32_t id, const Attrib *a)
+send_attrib(u_int32_t id, Attrib *a)
{
Buffer msg;
- debug("request %u: sent attrib have 0x%x", id, a->flags);
+ TRACE("sent attrib id %d have 0x%x", id, a->flags);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_ATTRS);
buffer_put_int(&msg, id);
{
Buffer msg;
- version = get_int();
- verbose("received client version %d", version);
+ version = buffer_get_int(&iqueue);
+ TRACE("client version %d", version);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_VERSION);
buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
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;
- logit("open \"%s\" flags %s mode 0%o",
- name, string_from_portable(pflags), mode);
+ 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, name, fd, NULL);
+ handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL);
if (handle < 0) {
close(fd);
} else {
id = get_int();
handle = get_handle();
- debug3("request %u: close handle %u", id, handle);
- handle_log_close(handle, NULL);
+ TRACE("close id %d handle %d", id, handle);
ret = handle_close(handle);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
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);
+ TRACE("read id %d handle %d off %llu len %d", id, handle,
+ (u_int64_t)off, len);
if (len > sizeof buf) {
len = sizeof buf;
- debug2("read change len %d", len);
+ log("read change len %d", len);
}
fd = handle_to_fd(handle);
if (fd >= 0) {
} else {
send_data(id, buf, ret);
status = SSH2_FX_OK;
- handle_update_read(handle, ret);
}
}
}
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);
+ TRACE("write id %d handle %d off %llu len %d", id, handle,
+ (u_int64_t)off, len);
fd = handle_to_fd(handle);
if (fd >= 0) {
if (lseek(fd, off, SEEK_SET) < 0) {
} else {
/* XXX ATOMICIO ? */
ret = write(fd, data, len);
- if (ret < 0) {
+ if (ret == -1) {
error("process_write: write failed");
status = errno_to_portable(errno);
- } else if ((size_t)ret == len) {
+ } else if (ret == len) {
status = SSH2_FX_OK;
- handle_update_write(handle, ret);
} else {
- debug2("nothing at all written");
+ log("nothing at all written");
}
}
}
id = get_int();
name = get_string(NULL);
- debug3("request %u: %sstat", id, do_lstat ? "l" : "");
- verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name);
+ 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);
id = get_int();
handle = get_handle();
- debug("request %u: fstat \"%s\" (handle %u)",
- id, handle_to_name(handle), handle);
+ TRACE("fstat id %d handle %d", id, handle);
fd = handle_to_fd(handle);
- if (fd >= 0) {
+ if (fd >= 0) {
ret = fstat(fd, &st);
if (ret < 0) {
status = errno_to_portable(errno);
}
static struct timeval *
-attrib_to_tv(const Attrib *a)
+attrib_to_tv(Attrib *a)
{
static struct timeval tv[2];
Attrib *a;
u_int32_t id;
char *name;
- int status = SSH2_FX_OK, ret;
+ int ret;
+ int status = SSH2_FX_OK;
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) {
- logit("set \"%s\" size %llu",
- name, (unsigned long long)a->size);
- ret = truncate(name, a->size);
- if (ret == -1)
- status = errno_to_portable(errno);
- }
+ TRACE("setstat id %d name %s", id, name);
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
- logit("set \"%s\" mode %04o", name, a->perm);
ret = chmod(name, a->perm & 0777);
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));
- logit("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) {
- logit("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);
u_int32_t id;
int handle, fd, ret;
int status = SSH2_FX_OK;
+ char *name;
id = get_int();
handle = get_handle();
a = get_attrib();
- debug("request %u: fsetstat handle %d", id, handle);
+ TRACE("fsetstat id %d handle %d", id, handle);
fd = handle_to_fd(handle);
- if (fd < 0) {
+ name = handle_to_name(handle);
+ if (fd < 0 || name == NULL) {
status = SSH2_FX_FAILURE;
} else {
- char *name = handle_to_name(handle);
-
- if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
- logit("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) {
- logit("set \"%s\" mode %04o", name, a->perm);
#ifdef HAVE_FCHMOD
ret = fchmod(fd, a->perm & 0777);
#else
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));
- logit("set \"%s\" modtime %s", name, buf);
#ifdef HAVE_FUTIMES
ret = futimes(fd, attrib_to_tv(a));
#else
status = errno_to_portable(errno);
}
if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
- logit("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
id = get_int();
path = get_string(NULL);
- debug3("request %u: opendir", id);
- logit("opendir \"%s\"", path);
+ 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, path, 0, dirp);
+ handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp);
if (handle < 0) {
closedir(dirp);
} else {
xfree(path);
}
+/*
+ * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
+ */
+static char *
+ls_file(char *name, struct stat *st)
+{
+ int ulen, glen, sz = 0;
+ struct passwd *pw;
+ struct group *gr;
+ struct tm *ltime = localtime(&st->st_mtime);
+ char *user, *group;
+ char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
+
+ strmode(st->st_mode, mode);
+ if ((pw = getpwuid(st->st_uid)) != NULL) {
+ user = pw->pw_name;
+ } else {
+ snprintf(ubuf, sizeof ubuf, "%d", st->st_uid);
+ user = ubuf;
+ }
+ if ((gr = getgrgid(st->st_gid)) != NULL) {
+ group = gr->gr_name;
+ } else {
+ snprintf(gbuf, sizeof gbuf, "%d", st->st_gid);
+ group = gbuf;
+ }
+ if (ltime != NULL) {
+ if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
+ sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
+ else
+ sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
+ }
+ if (sz == 0)
+ tbuf[0] = '\0';
+ ulen = MAX(strlen(user), 8);
+ glen = MAX(strlen(group), 8);
+ snprintf(buf, sizeof buf, "%s %3d %-*s %-*s %8llu %s %s", mode,
+ st->st_nlink, ulen, user, glen, group,
+ (u_int64_t)st->st_size, tbuf, name);
+ return xstrdup(buf);
+}
+
static void
process_readdir(void)
{
id = get_int();
handle = get_handle();
- debug("request %u: readdir \"%s\" (handle %d)", id,
- handle_to_name(handle), 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, SSH2_FX_FAILURE);
} else {
struct stat st;
- char pathname[MAXPATHLEN];
+ char pathname[1024];
Stat *stats;
int nstats = 10, count = 0, i;
-
- stats = xcalloc(nstats, sizeof(Stat));
+ stats = xmalloc(nstats * sizeof(Stat));
while ((dp = readdir(dirp)) != NULL) {
if (count >= nstats) {
nstats *= 2;
- stats = xrealloc(stats, nstats, sizeof(Stat));
+ stats = xrealloc(stats, nstats * sizeof(Stat));
}
/* XXX OVERFLOW ? */
snprintf(pathname, sizeof pathname, "%s%s%s", path,
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);
+ stats[count].long_name = ls_file(dp->d_name, &st);
count++;
/* send up to 100 entries in one message */
/* XXX check packet size instead */
}
if (count > 0) {
send_names(id, count, stats);
- for (i = 0; i < count; i++) {
+ for(i = 0; i < count; i++) {
xfree(stats[i].name);
xfree(stats[i].long_name);
}
id = get_int();
name = get_string(NULL);
- debug3("request %u: remove", id);
- logit("remove name \"%s\"", name);
+ TRACE("remove id %d name %s", id, name);
ret = unlink(name);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
a = get_attrib();
mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
a->perm & 0777 : 0777;
- debug3("request %u: mkdir", id);
- logit("mkdir name \"%s\" mode 0%o", name, mode);
+ TRACE("mkdir id %d name %s mode 0%o", id, name, mode);
ret = mkdir(name, mode);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
id = get_int();
name = get_string(NULL);
- debug3("request %u: rmdir", id);
- logit("rmdir name \"%s\"", name);
+ TRACE("rmdir id %d name %s", id, name);
ret = rmdir(name);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
xfree(path);
path = xstrdup(".");
}
- debug3("request %u: realpath", id);
- verbose("realpath \"%s\"", path);
+ TRACE("realpath id %d path %s", id, path);
if (realpath(path, resolvedname) == NULL) {
send_status(id, errno_to_portable(errno));
} else {
process_rename(void)
{
u_int32_t id;
+ struct stat st;
char *oldpath, *newpath;
- int status;
- struct stat sb;
+ int ret, status = SSH2_FX_FAILURE;
id = get_int();
oldpath = get_string(NULL);
newpath = get_string(NULL);
- debug3("request %u: rename", id);
- logit("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;
+ TRACE("rename id %d old %s new %s", id, oldpath, newpath);
+ /* fail if 'newpath' exists */
+ if (stat(newpath, &st) == -1) {
+ ret = rename(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
}
send_status(id, status);
xfree(oldpath);
{
u_int32_t id;
int len;
- char buf[MAXPATHLEN];
+ char link[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)
+ TRACE("readlink id %d path %s", id, path);
+ if ((len = readlink(path, link, sizeof(link) - 1)) == -1)
send_status(id, errno_to_portable(errno));
else {
Stat s;
-
- buf[len] = '\0';
+
+ link[len] = '\0';
attrib_clear(&s.attrib);
- s.name = s.long_name = buf;
+ s.name = s.long_name = link;
send_names(id, 1, &s);
}
xfree(path);
process_symlink(void)
{
u_int32_t id;
+ struct stat st;
char *oldpath, *newpath;
- int ret, status;
+ int ret, status = SSH2_FX_FAILURE;
id = get_int();
oldpath = get_string(NULL);
newpath = get_string(NULL);
- debug3("request %u: symlink", id);
- logit("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;
+ TRACE("symlink id %d old %s new %s", id, oldpath, newpath);
+ /* fail if 'newpath' exists */
+ if (stat(newpath, &st) == -1) {
+ ret = symlink(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ }
send_status(id, status);
xfree(oldpath);
xfree(newpath);
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)
+ if (buffer_len(&iqueue) < 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);
+ cp = (u_char *) buffer_ptr(&iqueue);
+ msg_len = GET_32BIT(cp);
+ if (msg_len > 256 * 1024) {
+ error("bad message ");
+ exit(11);
}
- if (buf_len < msg_len + 4)
+ if (buffer_len(&iqueue) < msg_len + 4)
return;
buffer_consume(&iqueue, 4);
- buf_len -= 4;
type = buffer_get_char(&iqueue);
switch (type) {
case SSH2_FXP_INIT:
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 */
-void
-cleanup_exit(int i)
-{
- if (pw != NULL && client_addr != NULL) {
- handle_log_exit();
- logit("session closed for local user %s from [%s]",
- pw->pw_name, client_addr);
- }
- _exit(i);
-}
-
-static void
-usage(void)
-{
- extern char *__progname;
-
- fprintf(stderr,
- "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname);
- exit(1);
}
int
-main(int argc, char **argv)
+main(int ac, char **av)
{
fd_set *rset, *wset;
- int in, out, max, ch, skipargs = 0, log_stderr = 0;
+ int in, out, max;
ssize_t len, olen, set_size;
- SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
- char *cp, buf[4*4096];
-
- extern char *optarg;
- extern char *__progname;
-
- /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
- sanitise_stdfd();
-
- __progname = ssh_get_progname(argv[0]);
- 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_level == 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");
-
- if ((pw = getpwuid(getuid())) == NULL)
- fatal("No user found for uid %lu", (u_long)getuid());
- pw = pwcopy(pw);
-
- logit("session opened for local user %s from [%s]",
- pw->pw_name, client_addr);
+ /* XXX should use getopt */
+ __progname = get_progname(av[0]);
handle_init();
+#ifdef DEBUG_SFTP_SERVER
+ log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0);
+#endif
+
in = dup(STDIN_FILENO);
out = dup(STDOUT_FILENO);
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);
-
+ 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);
+ 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");
- cleanup_exit(0);
+ exit(0);
} else if (len < 0) {
- error("read: %s", strerror(errno));
- cleanup_exit(1);
+ error("read error");
+ exit(1);
} else {
buffer_append(&iqueue, buf, len);
}
if (FD_ISSET(out, wset)) {
len = write(out, buffer_ptr(&oqueue), olen);
if (len < 0) {
- error("write: %s", strerror(errno));
- cleanup_exit(1);
+ error("write error");
+ 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();
+ /* process requests from client */
+ process();
}
}
andersk / gssapi-openssh.git / blobdiff