aa2c47d835
unless the nesting is already pretty deep, because there are normal cases where exit_cleanup is nested shallowly. Patch from Marc Espie, posted by Brian Poole.
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* -*- c-file-style: "linux" -*-
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Copyright (C) 1996-2000 by Andrew Tridgell
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Copyright (C) Paul Mackerras 1996
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Copyright (C) 2002 by Martin Pool
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "rsync.h"
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/**
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* @file cleanup.c
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*
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* Code for handling interrupted transfers. Depending on the @c
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* --partial option, we may either delete the temporary file, or go
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* ahead and overwrite the destination. This second behaviour only
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* occurs if we've sent literal data and therefore hopefully made
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* progress on the transfer.
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**/
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/**
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* Set to True once literal data has been sent across the link for the
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* current file. (????)
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*
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* Handling the cleanup when a transfer is interrupted is tricky when
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* --partial is selected. We need to ensure that the partial file is
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* kept if any real data has been transferred.
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**/
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int cleanup_got_literal=0;
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static char *cleanup_fname;
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static char *cleanup_new_fname;
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static struct file_struct *cleanup_file;
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static int cleanup_fd1, cleanup_fd2;
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static struct map_struct *cleanup_buf;
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static int cleanup_pid = 0;
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extern int io_error;
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pid_t cleanup_child_pid = -1;
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/**
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* Eventually calls exit(), passing @p code, therefore does not return.
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*
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* @param code one of the RERR_* codes from errcode.h.
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**/
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void _exit_cleanup(int code, const char *file, int line)
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{
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int ocode = code;
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extern int keep_partial;
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extern int log_got_error;
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static int inside_cleanup = 0;
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if (inside_cleanup > 10) {
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/* prevent the occasional infinite recursion */
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return;
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}
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inside_cleanup++;
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signal(SIGUSR1, SIG_IGN);
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signal(SIGUSR2, SIG_IGN);
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if (verbose > 3)
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rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): entered\n",
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code, file, line);
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if (cleanup_child_pid != -1) {
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int status;
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if (waitpid(cleanup_child_pid, &status, WNOHANG) == cleanup_child_pid) {
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status = WEXITSTATUS(status);
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if (status > code) code = status;
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}
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}
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if (cleanup_got_literal && cleanup_fname && keep_partial) {
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char *fname = cleanup_fname;
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cleanup_fname = NULL;
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if (cleanup_buf) unmap_file(cleanup_buf);
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if (cleanup_fd1 != -1) close(cleanup_fd1);
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if (cleanup_fd2 != -1) close(cleanup_fd2);
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finish_transfer(cleanup_new_fname, fname, cleanup_file);
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}
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io_flush();
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if (cleanup_fname)
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do_unlink(cleanup_fname);
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if (code) {
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kill_all(SIGUSR1);
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}
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if ((cleanup_pid != 0) && (cleanup_pid == (int) getpid())) {
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char *pidf = lp_pid_file();
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if (pidf && *pidf) {
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unlink(lp_pid_file());
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}
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}
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if (code == 0 && (io_error || log_got_error)) {
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code = RERR_PARTIAL;
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}
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if (code) log_exit(code, file, line);
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if (verbose > 2)
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rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): about to call exit(%d)\n",
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ocode, file, line, code);
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exit(code);
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}
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void cleanup_disable(void)
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{
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cleanup_fname = NULL;
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cleanup_got_literal = 0;
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}
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void cleanup_set(char *fnametmp, char *fname, struct file_struct *file,
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struct map_struct *buf, int fd1, int fd2)
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{
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cleanup_fname = fnametmp;
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cleanup_new_fname = fname;
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cleanup_file = file;
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cleanup_buf = buf;
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cleanup_fd1 = fd1;
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cleanup_fd2 = fd2;
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}
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void cleanup_set_pid(int pid)
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{
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cleanup_pid = pid;
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}
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