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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"
extern int io_error;
extern int keep_partial;
extern int log_got_error;
extern char *partial_dir;
/**
* Close all open sockets and files, allowing a (somewhat) graceful
* shutdown() of socket connections. This eliminates the abortive
* TCP RST sent by a Winsock-based system when the close() occurs.
**/
void close_all(void)
{
#ifdef SHUTDOWN_ALL_SOCKETS
int max_fd;
int fd;
int ret;
STRUCT_STAT st;
max_fd = sysconf(_SC_OPEN_MAX) - 1;
for (fd = max_fd; fd >= 0; fd--) {
if ((ret = do_fstat(fd, &st)) == 0) {
if (is_a_socket(fd))
ret = shutdown(fd, 2);
ret = close(fd);
}
}
#endif
}
/**
* @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_fd_r, cleanup_fd_w;
static pid_t cleanup_pid = 0;
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;
static int inside_cleanup = 0;
if (inside_cleanup > 10) {
/* prevent the occasional infinite recursion */
return;
}
inside_cleanup++;
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
&& handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
char *fname = cleanup_fname;
cleanup_fname = NULL;
if (cleanup_fd_r != -1)
close(cleanup_fd_r);
if (cleanup_fd_w != -1) {
flush_write_file(cleanup_fd_w);
close(cleanup_fd_w);
}
finish_transfer(cleanup_new_fname, fname, cleanup_file, 0,
!partial_dir);
}
io_flush(FULL_FLUSH);
if (cleanup_fname)
do_unlink(cleanup_fname);
if (code)
kill_all(SIGUSR1);
if (cleanup_pid && cleanup_pid == getpid()) {
char *pidf = lp_pid_file();
if (pidf && *pidf)
unlink(lp_pid_file());
}
if (code == 0) {
if (io_error & IOERR_DEL_LIMIT)
code = RERR_DEL_LIMIT;
if (io_error & IOERR_VANISHED)
code = RERR_VANISHED;
if (io_error & IOERR_GENERAL || 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);
}
close_all();
exit(code);
}
void cleanup_disable(void)
{
cleanup_fname = NULL;
cleanup_got_literal = 0;
}
void cleanup_set(char *fnametmp, char *fname, struct file_struct *file,
int fd_r, int fd_w)
{
cleanup_fname = fname ? fnametmp : NULL;
cleanup_new_fname = fname;
cleanup_file = file;
cleanup_fd_r = fd_r;
cleanup_fd_w = fd_w;
}
void cleanup_set_pid(pid_t pid)
{
cleanup_pid = pid;
}
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