-/* $OpenBSD: sftp-server.c,v 1.75 2008/01/21 17:24:30 djm Exp $ */
+/* $OpenBSD: sftp-server.c,v 1.88 2009/10/17 12:10:39 sobrado Exp $ */
/*
* Copyright (c) 2000-2004 Markus Friedl. All rights reserved.
*
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#ifdef HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
#include <dirent.h>
#include <errno.h>
case EINVAL:
ret = SSH2_FX_BAD_MESSAGE;
break;
+ case ENOSYS:
+ ret = SSH2_FX_OP_UNSUPPORTED;
+ break;
default:
ret = SSH2_FX_FAILURE;
break;
buffer_free(&msg);
}
+static void
+send_statvfs(u_int32_t id, struct statvfs *st)
+{
+ Buffer msg;
+ u_int64_t flag;
+
+ flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0;
+ flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0;
+
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH2_FXP_EXTENDED_REPLY);
+ buffer_put_int(&msg, id);
+ buffer_put_int64(&msg, st->f_bsize);
+ buffer_put_int64(&msg, st->f_frsize);
+ buffer_put_int64(&msg, st->f_blocks);
+ buffer_put_int64(&msg, st->f_bfree);
+ buffer_put_int64(&msg, st->f_bavail);
+ buffer_put_int64(&msg, st->f_files);
+ buffer_put_int64(&msg, st->f_ffree);
+ buffer_put_int64(&msg, st->f_favail);
+ buffer_put_int64(&msg, FSID_TO_ULONG(st->f_fsid));
+ buffer_put_int64(&msg, flag);
+ buffer_put_int64(&msg, st->f_namemax);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
/* parse incoming */
static void
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_VERSION);
buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
+ /* POSIX rename extension */
+ buffer_put_cstring(&msg, "posix-rename@openssh.com");
+ buffer_put_cstring(&msg, "1"); /* version */
+ /* statvfs extension */
+ buffer_put_cstring(&msg, "statvfs@openssh.com");
+ buffer_put_cstring(&msg, "2"); /* version */
+ /* fstatvfs extension */
+ buffer_put_cstring(&msg, "fstatvfs@openssh.com");
+ buffer_put_cstring(&msg, "2"); /* version */
send_msg(&msg);
buffer_free(&msg);
}
}
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
logit("set \"%s\" mode %04o", name, a->perm);
- ret = chmod(name, a->perm & 0777);
+ ret = chmod(name, a->perm & 07777);
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);
+ ret = fchmod(fd, a->perm & 07777);
#else
- ret = chmod(name, a->perm & 0777);
+ ret = chmod(name, a->perm & 07777);
#endif
if (ret == -1)
status = errno_to_portable(errno);
name = get_string(NULL);
a = get_attrib();
mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
- a->perm & 0777 : 0777;
+ a->perm & 07777 : 0777;
debug3("request %u: mkdir", id);
logit("mkdir name \"%s\" mode 0%o", name, mode);
ret = mkdir(name, mode);
else if (S_ISREG(sb.st_mode)) {
/* Race-free rename of regular files */
if (link(oldpath, newpath) == -1) {
- if (errno == EOPNOTSUPP
+ if (errno == EOPNOTSUPP || errno == ENOSYS
+#ifdef EXDEV
+ || errno == EXDEV
+#endif
#ifdef LINK_OPNOTSUPP_ERRNO
|| errno == LINK_OPNOTSUPP_ERRNO
#endif
xfree(newpath);
}
+static void
+process_extended_posix_rename(u_int32_t id)
+{
+ char *oldpath, *newpath;
+
+ oldpath = get_string(NULL);
+ newpath = get_string(NULL);
+ debug3("request %u: posix-rename", id);
+ logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath);
+ if (rename(oldpath, newpath) == -1)
+ send_status(id, errno_to_portable(errno));
+ else
+ send_status(id, SSH2_FX_OK);
+ xfree(oldpath);
+ xfree(newpath);
+}
+
+static void
+process_extended_statvfs(u_int32_t id)
+{
+ char *path;
+ struct statvfs st;
+
+ path = get_string(NULL);
+ debug3("request %u: statfs", id);
+ logit("statfs \"%s\"", path);
+
+ if (statvfs(path, &st) != 0)
+ send_status(id, errno_to_portable(errno));
+ else
+ send_statvfs(id, &st);
+ xfree(path);
+}
+
+static void
+process_extended_fstatvfs(u_int32_t id)
+{
+ int handle, fd;
+ struct statvfs st;
+
+ handle = get_handle();
+ debug("request %u: fstatvfs \"%s\" (handle %u)",
+ id, handle_to_name(handle), handle);
+ if ((fd = handle_to_fd(handle)) < 0) {
+ send_status(id, SSH2_FX_FAILURE);
+ return;
+ }
+ if (fstatvfs(fd, &st) != 0)
+ send_status(id, errno_to_portable(errno));
+ else
+ send_statvfs(id, &st);
+}
+
static void
process_extended(void)
{
id = get_int();
request = get_string(NULL);
- send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
+ if (strcmp(request, "posix-rename@openssh.com") == 0)
+ process_extended_posix_rename(id);
+ else if (strcmp(request, "statvfs@openssh.com") == 0)
+ process_extended_statvfs(id);
+ else if (strcmp(request, "fstatvfs@openssh.com") == 0)
+ process_extended_fstatvfs(id);
+ else
+ send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
xfree(request);
}
if (msg_len > SFTP_MAX_MSG_LENGTH) {
error("bad message from %s local user %s",
client_addr, pw->pw_name);
- cleanup_exit(11);
+ sftp_server_cleanup_exit(11);
}
if (buf_len < msg_len + 4)
return;
break;
}
/* discard the remaining bytes from the current packet */
- if (buf_len < buffer_len(&iqueue))
- fatal("iqueue grew unexpectedly");
+ if (buf_len < buffer_len(&iqueue)) {
+ error("iqueue grew unexpectedly");
+ sftp_server_cleanup_exit(255);
+ }
consumed = buf_len - buffer_len(&iqueue);
- if (msg_len < consumed)
- fatal("msg_len %d < consumed %d", msg_len, consumed);
+ if (msg_len < consumed) {
+ error("msg_len %d < consumed %d", msg_len, consumed);
+ sftp_server_cleanup_exit(255);
+ }
if (msg_len > consumed)
buffer_consume(&iqueue, msg_len - consumed);
}
/* Cleanup handler that logs active handles upon normal exit */
void
-cleanup_exit(int i)
+sftp_server_cleanup_exit(int i)
{
if (pw != NULL && client_addr != NULL) {
handle_log_exit();
}
static void
-usage(void)
+sftp_server_usage(void)
{
extern char *__progname;
fprintf(stderr,
- "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname);
+ "usage: %s [-eh] [-f log_facility] [-l log_level] [-u umask]\n",
+ __progname);
exit(1);
}
int
-main(int argc, char **argv)
+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];
+ const char *errmsg;
+ mode_t mask;
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) {
+ while (!skipargs && (ch = getopt(argc, argv, "f:l:u:che")) != -1) {
switch (ch) {
case 'c':
/*
if (log_facility == SYSLOG_FACILITY_NOT_SET)
error("Invalid log facility \"%s\"", optarg);
break;
+ case 'u':
+ mask = (mode_t)strtonum(optarg, 0, 0777, &errmsg);
+ if (errmsg != NULL)
+ fatal("Invalid umask \"%s\": %s",
+ optarg, errmsg);
+ (void)umask(mask);
+ break;
case 'h':
default:
- usage();
+ sftp_server_usage();
}
}
if ((cp = getenv("SSH_CONNECTION")) != NULL) {
client_addr = xstrdup(cp);
- if ((cp = strchr(client_addr, ' ')) == NULL)
- fatal("Malformed SSH_CONNECTION variable: \"%s\"",
+ if ((cp = strchr(client_addr, ' ')) == NULL) {
+ error("Malformed SSH_CONNECTION variable: \"%s\"",
getenv("SSH_CONNECTION"));
+ sftp_server_cleanup_exit(255);
+ }
*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);
+ pw = pwcopy(user_pw);
logit("session opened for local user %s from [%s]",
pw->pw_name, client_addr);
if (errno == EINTR)
continue;
error("select: %s", strerror(errno));
- cleanup_exit(2);
+ sftp_server_cleanup_exit(2);
}
/* copy stdin to iqueue */
len = read(in, buf, sizeof buf);
if (len == 0) {
debug("read eof");
- cleanup_exit(0);
+ sftp_server_cleanup_exit(0);
} else if (len < 0) {
error("read: %s", strerror(errno));
- cleanup_exit(1);
+ sftp_server_cleanup_exit(1);
} else {
buffer_append(&iqueue, buf, len);
}
len = write(out, buffer_ptr(&oqueue), olen);
if (len < 0) {
error("write: %s", strerror(errno));
- cleanup_exit(1);
+ sftp_server_cleanup_exit(1);
} else {
buffer_consume(&oqueue, len);
}
andersk / openssh.git / blobdiff