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/* store.c - twoftpd routines for handling storage-modifying commands
* Copyright (C) 2001 Bruce Guenter <bruceg@em.ca>
*
* 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 unsigned long network_bytes;
static str rnfr_filename;
static int copy(ibuf* in, obuf* out)
{
char buf[iobuf_bufsize];
char* ptr;
char* prev;
unsigned count;
if (obuf_error(out)) return 0;
network_bytes = 0;
for (;;) {
if (!ibuf_read(in, buf, sizeof buf) && in->count == 0) {
if (ibuf_eof(in)) break;
return 0;
}
count = in->count;
network_bytes += count;
prev = buf;
if (!binary_flag) {
while (count) {
if ((ptr = memchr(prev, CR, count)) ==0) break;
if (!obuf_write(out, prev, ptr - prev)) return 0;
count -= ptr + 1 - prev;
prev = ptr + 1;
}
}
if (!obuf_write(out, prev, count)) return 0;
}
if (!obuf_flush(out)) return 0;
return 1;
}
static int open_copy_close(int append)
{
int r;
ibuf in;
obuf out;
unsigned long ss;
ss = startpos;
startpos = 0;
if (!open_out(&out, req_param,
append ? O_APPEND
: store_exclusive ? O_CREAT | O_EXCL
: ss ? 0
: O_CREAT | O_TRUNC))
return respond_syserr(550, "Could not open output file");
if (ss && !obuf_seek(&out, ss)) {
obuf_close(&out);
return respond(550, 1, "Could not seek to start position in output file.");
}
if (!make_in_connection(&in)) {
obuf_close(&out);
if (store_exclusive)
unlink(req_param);
return 1;
}
r = copy(&in, &out);
if (!ibuf_close(&in)) r = 0;
if (!obuf_close(&out)) r = 0;
if (r)
return respond_bytes(226, "File received successfully", network_bytes, 0);
else
return respond_bytes(451, "File store failed", network_bytes, 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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