cleanup.c

   1 /* -*- c-file-style: "linux" -*-
   2
   3    Copyright (C) 1996-2000 by Andrew Tridgell
   4    Copyright (C) Paul Mackerras 1996
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "rsync.h"
  22
  23 /* handling the cleanup when a transfer is interrupted is tricky when
  24    --partial is selected. We need to ensure that the partial file is
  25    kept if any real data has been transferred */
  26 int cleanup_got_literal=0;
  27
  28 static char *cleanup_fname;
  29 static char *cleanup_new_fname;
  30 static struct file_struct *cleanup_file;
  31 static int cleanup_fd1, cleanup_fd2;
  32 static struct map_struct *cleanup_buf;
  33 static int cleanup_pid = 0;
  34 extern int io_error;
  35
  36 pid_t cleanup_child_pid = -1;
  37
  38 /*
  39  * Code is one of the RERR_* codes from errcode.h.
  40  */
  41 void _exit_cleanup(int code, const char *file, int line)
  42 {
  43         extern int keep_partial;
  44         extern int log_got_error;
  45
  46         signal(SIGUSR1, SIG_IGN);
  47         signal(SIGUSR2, SIG_IGN);
  48
  49         if (cleanup_child_pid != -1) {
  50                 int status;
  51                 if (waitpid(cleanup_child_pid, &status, WNOHANG) == cleanup_child_pid) {
  52                         status = WEXITSTATUS(status);
  53                         if (status > code) code = status;
  54                 }
  55         }
  56
  57         if (cleanup_got_literal && cleanup_fname && keep_partial) {
  58                 char *fname = cleanup_fname;
  59                 cleanup_fname = NULL;
  60                 if (cleanup_buf) unmap_file(cleanup_buf);
  61                 if (cleanup_fd1 != -1) close(cleanup_fd1);
  62                 if (cleanup_fd2 != -1) close(cleanup_fd2);
  63                 finish_transfer(cleanup_new_fname, fname, cleanup_file);
  64         }
  65         io_flush();
  66         if (cleanup_fname)
  67                 do_unlink(cleanup_fname);
  68         if (code) {
  69                 kill_all(SIGUSR1);
  70         }
  71         if ((cleanup_pid != 0) && (cleanup_pid == (int) getpid())) {
  72                 char *pidf = lp_pid_file();
  73                 if (pidf && *pidf) {
  74                         unlink(lp_pid_file());
  75                 }
  76         }
  77
  78         if (code == 0 && (io_error || log_got_error)) {
  79                 code = RERR_PARTIAL;
  80         }
  81
  82         if (code) log_exit(code, file, line);
  83
  84         exit(code);
  85 }
  86
  87 void cleanup_disable(void)
  88 {
  89         cleanup_fname = NULL;
  90         cleanup_got_literal = 0;
  91 }
  92
  93
  94 void cleanup_set(char *fnametmp, char *fname, struct file_struct *file,
  95                  struct map_struct *buf, int fd1, int fd2)
  96 {
  97         cleanup_fname = fnametmp;
  98         cleanup_new_fname = fname;
  99         cleanup_file = file;
 100         cleanup_buf = buf;
 101         cleanup_fd1 = fd1;
 102         cleanup_fd2 = fd2;
 103 }
 104
 105 void cleanup_set_pid(int pid)
 106 {
 107         cleanup_pid = pid;
 108 }