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/* store.c - twoftpd routines for handling storage-modifying commands
* Copyright (C) 2008 Bruce Guenter <bruce@untroubled.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "twoftpd.h"
#include "backend.h"
static str rnfr_filename;
static unsigned long xlate_ascii(char* out,
const char* in,
unsigned long inlen)
{
unsigned long outlen;
for (outlen = 0; inlen > 0; --inlen, ++in) {
if (*in != CR) {
*out = *in;
++outlen;
++out;
}
}
return outlen;
}
static int open_copy_close(int append)
{
int in;
int out;
unsigned long ss;
unsigned long bytes_in;
unsigned long bytes_out;
int result;
ss = startpos;
startpos = 0;
if ((out = open_fd(req_param,
append ? O_WRONLY | O_APPEND
: store_exclusive ? O_WRONLY | O_CREAT | O_EXCL
: ss ? O_WRONLY
: O_WRONLY | O_CREAT | O_TRUNC,
0666)) == -1)
return respond_syserr(550, "Could not open output file");
if (ss && lseek(out, ss, SEEK_SET) != ss) {
close(out);
return respond(550, 1, "Could not seek to start position in output file.");
}
if ((in = make_in_connection()) == -1) {
close(out);
if (store_exclusive)
unlink(req_param);
return 1;
}
result = copy_xlate_close(in, out, timeout * 1000,
binary_flag ? 0 : xlate_ascii,
&bytes_in, &bytes_out);
return respond_xferresult(result, bytes_in, 0);
}
int handle_stor(void)
{
return open_copy_close(0);
}
int handle_appe(void)
{
return open_copy_close(1);
}
int handle_mkd(void)
{
if (!qualify_validate(req_param)) return 1;
if (mkdir(fullpath.s+1, 0777))
return respond_syserr(550, "Could not create directory");
return respond(257, 1, "Directory created successfully.");
}
int handle_rmd(void)
{
if (!qualify_validate(req_param)) return 1;
if (rmdir(fullpath.s+1))
return respond_syserr(550, "Could not remove directory");
return respond(250, 1, "Directory removed successfully.");
}
int handle_dele(void)
{
if (!qualify_validate(req_param)) return 1;
if (unlink(fullpath.s+1))
return respond_syserr(550, "Could not remove file");
return respond(250, 1, "File removed successfully.");
}
int handle_rnfr(void)
{
struct stat st;
if (!qualify_validate(req_param)) return 1;
if (stat(fullpath.s+1, &st) == -1) {
if (errno == EEXIST)
return respond(550, 1, "File does not exist.");
else
return respond(450, 1, "Could not locate file.");
}
if (!str_copy(&rnfr_filename, &fullpath)) return respond_internal_error();
return respond(350, 1, "OK, file exists.");
}
int handle_rnto(void)
{
int r;
if (!qualify_validate(req_param)) return 1;
if (!rnfr_filename.len) return respond(425, 1, "Send RNFR first.");
r = rename(rnfr_filename.s+1, fullpath.s+1);
str_truncate(&rnfr_filename, 0);
if (r == -1) return respond_syserr(550, "Could not rename file");
return respond(250, 1, "File renamed.");
}
int handle_site_chmod(void)
{
unsigned mode;
const char* ptr;
for (ptr = req_param, mode = 0; *ptr >= '0' && *ptr <= '7'; ++ptr)
mode = (mode * 8) | (*ptr - '0');
if (ptr == req_param || *ptr != SPACE || mode > 0777)
return respond(501, 1, "Invalid mode specification.");
while (*ptr == SPACE) ++ptr;
if (!qualify_validate(ptr)) return 1;
if (chmod(fullpath.s+1, mode) != 0)
return respond_syserr(550, "Could not change modes on file");
return respond(250, 1, "File modes changed.");
}
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