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/* copy.c - copy one file to another.
Copyright (C) 1998 Tom Tromey
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, 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 <config.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include "sync.h"
/* Copy some data from the input file's buffer to the output file. */
static void
write_chunk (gpointer client_data, gint fd, GdkInputCondition cond)
{
struct reader *reader;
struct file *input;
int ret;
assert (cond == GDK_INPUT_WRITE);
reader = (struct reader *) client_data;
assert (fd == reader->local->fd || fd == reader->remote->fd);
input = (reader->local->fd == fd) ? reader->remote : reader->local;
ret = write (fd, &input->buffer[input->slot], input->size - input->slot);
if (ret == -1)
{
char *u;
struct file *output;
/* Certain errors are ok. */
if (errno == EINTR || errno == EAGAIN)
return;
output = (reader->local->fd == fd) ? reader->local : reader->remote;
if (input == reader->local)
u = _("Error while writing to remote file");
else
u = _("Error while writing to local file");
display_posix_error (reader->database, reader->local->name,
reader->remote->name, u);
free_reader (reader);
return;
}
input->slot += ret;
if (input->slot == input->size)
{
/* Done writing. */
if (update_entry (reader->database->database, reader->local->name,
reader->remote->name, input->checksum) == -1)
db_posix_error (_("Error while writing to database file"),
reader->database->filename);
display_message (reader->database, reader->local->name,
reader->remote->name, "");
free_reader (reader);
}
}
/* Copy one file to the other. We have a separate DIRECTION argument
so that we can report errors and preserve the information about
which file is "local". */
void
copy (struct reader *reader, int direction)
{
struct file *from, *to;
from = (direction == COPY_FROM_LOCAL) ? reader->local : reader->remote;
to = (direction == COPY_FROM_LOCAL) ? reader->remote : reader->local;
display_message (reader->database, reader->local->name,
reader->remote->name,
(direction == COPY_FROM_LOCAL)
? _("Copying from local to remote")
: _("Copying from remote to local"));
/* FIXME: make backup of TO here.
Really should read into temp file and then rename at the end. */
to->fd = open (to->name, O_WRONLY | O_CREAT | O_TRUNC, from->mode);
if (to->fd == -1)
{
display_posix_error (reader->database, reader->local->name,
reader->remote->name,
_("Couldn't open file for writing: "));
free_reader (reader);
return;
}
/* Set this separately because we want open() to block until ready.
Don't check failure here -- it isn't fatal if this fails. */
fcntl (to->fd, F_SETFL, O_NONBLOCK);
if ((from->flags & FLAG_FULL))
{
/* We have the full input file already. So just start writing
immediately. If we're writing to a local file, this will
just grind away without giving time to the UI -- but that
doesn't really matter. */
if (! (from->flags & FLAG_MAPPED))
{
from->size = from->slot;
from->slot = 0;
}
to->state = STATE_WRITING;
to->tag = gdk_input_add (to->fd, GDK_INPUT_WRITE, write_chunk,
(gpointer) reader);
}
else
{
/* FIXME: must open input file for reading, and write results to
output. This requires a bit of synchronization: we don't
want the input to overrun the output, so we must disable the
input when the output is blocked and the input buffer is too
full. */
assert (0);
}
}
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