| 1 | /* -*- c-file-style: "linux" -*- |
| 2 | |
| 3 | Copyright (C) 1996-2000 by Andrew Tridgell |
| 4 | Copyright (C) Paul Mackerras 1996 |
| 5 | Copyright (C) 2002 by Martin Pool |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include "rsync.h" |
| 23 | |
| 24 | /** |
| 25 | * @file cleanup.c |
| 26 | * |
| 27 | * Code for handling interrupted transfers. Depending on the @c |
| 28 | * --partial option, we may either delete the temporary file, or go |
| 29 | * ahead and overwrite the destination. This second behaviour only |
| 30 | * occurs if we've sent literal data and therefore hopefully made |
| 31 | * progress on the transfer. |
| 32 | **/ |
| 33 | |
| 34 | /** |
| 35 | * Set to True once literal data has been sent across the link for the |
| 36 | * current file. (????) |
| 37 | * |
| 38 | * Handling the cleanup when a transfer is interrupted is tricky when |
| 39 | * --partial is selected. We need to ensure that the partial file is |
| 40 | * kept if any real data has been transferred. |
| 41 | **/ |
| 42 | int cleanup_got_literal=0; |
| 43 | |
| 44 | static char *cleanup_fname; |
| 45 | static char *cleanup_new_fname; |
| 46 | static struct file_struct *cleanup_file; |
| 47 | static int cleanup_fd1, cleanup_fd2; |
| 48 | static struct map_struct *cleanup_buf; |
| 49 | static int cleanup_pid = 0; |
| 50 | extern int io_error; |
| 51 | |
| 52 | pid_t cleanup_child_pid = -1; |
| 53 | |
| 54 | /** |
| 55 | * Eventually calls exit(), passing @p code, therefore does not return. |
| 56 | * |
| 57 | * @param code one of the RERR_* codes from errcode.h. |
| 58 | **/ |
| 59 | void _exit_cleanup(int code, const char *file, int line) |
| 60 | { |
| 61 | int ocode = code; |
| 62 | extern int keep_partial; |
| 63 | extern int log_got_error; |
| 64 | |
| 65 | signal(SIGUSR1, SIG_IGN); |
| 66 | signal(SIGUSR2, SIG_IGN); |
| 67 | |
| 68 | if (verbose > 3) |
| 69 | rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): entered\n", |
| 70 | code, file, line); |
| 71 | |
| 72 | if (cleanup_child_pid != -1) { |
| 73 | int status; |
| 74 | if (waitpid(cleanup_child_pid, &status, WNOHANG) == cleanup_child_pid) { |
| 75 | status = WEXITSTATUS(status); |
| 76 | if (status > code) code = status; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | if (cleanup_got_literal && cleanup_fname && keep_partial) { |
| 81 | char *fname = cleanup_fname; |
| 82 | cleanup_fname = NULL; |
| 83 | if (cleanup_buf) unmap_file(cleanup_buf); |
| 84 | if (cleanup_fd1 != -1) close(cleanup_fd1); |
| 85 | if (cleanup_fd2 != -1) close(cleanup_fd2); |
| 86 | finish_transfer(cleanup_new_fname, fname, cleanup_file); |
| 87 | } |
| 88 | io_flush(); |
| 89 | if (cleanup_fname) |
| 90 | do_unlink(cleanup_fname); |
| 91 | if (code) { |
| 92 | kill_all(SIGUSR1); |
| 93 | } |
| 94 | if ((cleanup_pid != 0) && (cleanup_pid == (int) getpid())) { |
| 95 | char *pidf = lp_pid_file(); |
| 96 | if (pidf && *pidf) { |
| 97 | unlink(lp_pid_file()); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | if (code == 0 && (io_error || log_got_error)) { |
| 102 | code = RERR_PARTIAL; |
| 103 | } |
| 104 | |
| 105 | if (code) log_exit(code, file, line); |
| 106 | |
| 107 | if (verbose > 2) |
| 108 | rprintf(FINFO,"_exit_cleanup(code=%d, file=%s, line=%d): about to call exit(%d)\n", |
| 109 | ocode, file, line, code); |
| 110 | |
| 111 | exit(code); |
| 112 | } |
| 113 | |
| 114 | void cleanup_disable(void) |
| 115 | { |
| 116 | cleanup_fname = NULL; |
| 117 | cleanup_got_literal = 0; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | void cleanup_set(char *fnametmp, char *fname, struct file_struct *file, |
| 122 | struct map_struct *buf, int fd1, int fd2) |
| 123 | { |
| 124 | cleanup_fname = fnametmp; |
| 125 | cleanup_new_fname = fname; |
| 126 | cleanup_file = file; |
| 127 | cleanup_buf = buf; |
| 128 | cleanup_fd1 = fd1; |
| 129 | cleanup_fd2 = fd2; |
| 130 | } |
| 131 | |
| 132 | void cleanup_set_pid(int pid) |
| 133 | { |
| 134 | cleanup_pid = pid; |
| 135 | } |