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sftp-server.c
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/* $OpenBSD: sftp-server.c,v 1.93 2010/12/04 00:18:01 djm Exp $ */
/*
* 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.
*/
#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
#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>
#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 "log.h"
#include "misc.h"
#include "uidswap.h"
#include "sftp.h"
#include "sftp-common.h"
/* helper */
#define get_int64() buffer_get_int64(&iqueue);
#define get_int() buffer_get_int(&iqueue);
#define get_string(lenp) buffer_get_string(&iqueue, lenp);
/* 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;
/* Disable writes */
int readonly;
/* 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;
case ENOSYS:
ret = SSH2_FX_OP_UNSUPPORTED;
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;
int next_unused;
};
enum {
HANDLE_UNUSED,
HANDLE_DIR,
HANDLE_FILE
};
Handle *handles = NULL;
u_int num_handles = 0;
int first_unused_handle = -1;
static void handle_unused(int i)
{
handles[i].use = HANDLE_UNUSED;
handles[i].next_unused = first_unused_handle;
first_unused_handle = i;
}
static int
handle_new(int use, const char *name, int fd, DIR *dirp)
{
int i;
if (first_unused_handle == -1) {
if (num_handles + 1 <= num_handles)
return -1;
num_handles++;
handles = xrealloc(handles, num_handles, sizeof(Handle));
handle_unused(num_handles - 1);
}
i = first_unused_handle;
first_unused_handle = handles[i].next_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;
}
static int
handle_is_ok(int i, int type)
{
return i >= 0 && (u_int)i < num_handles && 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);
xfree(handles[handle].name);
handle_unused(handle);
} else if (handle_is_ok(handle, HANDLE_DIR)) {
ret = closedir(handles[handle].dirp);
xfree(handles[handle].name);
handle_unused(handle);
} 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 < num_handles; 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))
logit("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);
}
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
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);
/* POSIX rename extension */
buffer_put_cstring(&msg, "[email protected]");
buffer_put_cstring(&msg, "1"); /* version */
/* statvfs extension */
buffer_put_cstring(&msg, "[email protected]");
buffer_put_cstring(&msg, "2"); /* version */
/* fstatvfs extension */
buffer_put_cstring(&msg, "[email protected]");
buffer_put_cstring(&msg, "2"); /* version */
/* hardlink extension */
buffer_put_cstring(&msg, "[email protected]");
buffer_put_cstring(&msg, "1"); /* 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;
logit("open \"%s\" flags %s mode 0%o",
name, string_from_portable(pflags), mode);
if (readonly &&
((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR))
status = SSH2_FX_PERMISSION_DENIED;
else {
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;
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)
status = SSH2_FX_FAILURE;
else if (readonly)
status = SSH2_FX_PERMISSION_DENIED;
else {
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");
status = SSH2_FX_FAILURE;
}
}
}
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 (readonly) {
status = SSH2_FX_PERMISSION_DENIED;
a->flags = 0;
}
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);
}
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
logit("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));
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);
}
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 if (readonly)
status = SSH2_FX_PERMISSION_DENIED;
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 & 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));
logit("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) {
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
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);
logit("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, 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);
logit("remove name \"%s\"", name);
if (readonly)
status = SSH2_FX_PERMISSION_DENIED;
else {
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 & 07777 : 0777;