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/* -*- c-file-style: "linux" -*-
Copyright (C) 1996-2000 by Andrew Tridgell
Copyright (C) Paul Mackerras 1996
Copyright (C) 2002 by Martin Pool
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "rsync.h"
/**
* @file cleanup.c
*
* Code for handling interrupted transfers. Depending on the @c
* --partial option, we may either delete the temporary file, or go
* ahead and overwrite the destination. This second behaviour only
* occurs if we've sent literal data and therefore hopefully made
* progress on the transfer.
**/
/**
* Set to True once literal data has been sent across the link for the
* current file. (????)
*
* Handling the cleanup when a transfer is interrupted is tricky when
* --partial is selected. We need to ensure that the partial file is
* kept if any real data has been transferred.
**/
int cleanup_got_literal=0;
static char *cleanup_fname;
static char *cleanup_new_fname;
static struct file_struct *cleanup_file;
static int cleanup_fd1, cleanup_fd2;
static struct map_struct *cleanup_buf;
static int cleanup_pid = 0;
extern int io_error;
pid_t cleanup_child_pid = -1;
/**
* Eventually calls exit(), passing @p code, therefore does not return.
*
* @param code one of the RERR_* codes from errcode.h.
**/
void _exit_cleanup(int code, const char *file, int line)
{
int ocode = code;
extern int keep_partial;
extern int log_got_error;
static int inside_cleanup = 0;
if (inside_cleanup != 0) {
/* prevent the occasional infinite recursion */
return;
}
inside_cleanup = 1;
signal(SIGUSR1, SIG_IGN);
signal(SIGUSR2, SIG_IGN);
if (verbose > 3)
rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): entered\n",
code, file, line);
if (cleanup_child_pid != -1) {
int status;
if (waitpid(cleanup_child_pid, &status, WNOHANG) == cleanup_child_pid) {
status = WEXITSTATUS(status);
if (status > code) code = status;
}
}
if (cleanup_got_literal && cleanup_fname && keep_partial) {
char *fname = cleanup_fname;
cleanup_fname = NULL;
if (cleanup_buf) unmap_file(cleanup_buf);
if (cleanup_fd1 != -1) close(cleanup_fd1);
if (cleanup_fd2 != -1) close(cleanup_fd2);
finish_transfer(cleanup_new_fname, fname, cleanup_file);
}
io_flush();
if (cleanup_fname)
do_unlink(cleanup_fname);
if (code) {
kill_all(SIGUSR1);
}
if ((cleanup_pid != 0) && (cleanup_pid == (int) getpid())) {
char *pidf = lp_pid_file();
if (pidf && *pidf) {
unlink(lp_pid_file());
}
}
if (code == 0 && (io_error || log_got_error)) {
code = RERR_PARTIAL;
}
if (code) log_exit(code, file, line);
if (verbose > 2)
rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): about to call exit(%d)\n",
ocode, file, line, code);
exit(code);
}
void cleanup_disable(void)
{
cleanup_fname = NULL;
cleanup_got_literal = 0;
}
void cleanup_set(char *fnametmp, char *fname, struct file_struct *file,
struct map_struct *buf, int fd1, int fd2)
{
cleanup_fname = fnametmp;
cleanup_new_fname = fname;
cleanup_file = file;
cleanup_buf = buf;
cleanup_fd1 = fd1;
cleanup_fd2 = fd2;
}
void cleanup_set_pid(int pid)
{
cleanup_pid = pid;
}
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