batch.c

   1 /*
   2  * Support for the batch-file options.
   3  *
   4  * Copyright (C) 1999 Weiss
   5  * Copyright (C) 2004 Chris Shoemaker
   6  * Copyright (C) 2004-2008 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "zlib/zlib.h"
  24 #include <time.h>
  25
  26 extern int eol_nulls;
  27 extern int recurse;
  28 extern int xfer_dirs;
  29 extern int preserve_links;
  30 extern int preserve_hard_links;
  31 extern int preserve_devices;
  32 extern int preserve_uid;
  33 extern int preserve_gid;
  34 extern int preserve_acls;
  35 extern int preserve_xattrs;
  36 extern int always_checksum;
  37 extern int do_compression;
  38 extern int inplace;
  39 extern int append_mode;
  40 extern int protocol_version;
  41 extern char *batch_name;
  42 #ifdef ICONV_OPTION
  43 extern char *iconv_opt;
  44 #endif
  45
  46 extern struct filter_list_struct filter_list;
  47
  48 int batch_stream_flags;
  49
  50 static int tweaked_append;
  51 static int tweaked_append_verify;
  52 static int tweaked_iconv;
  53
  54 static int *flag_ptr[] = {
  55         &recurse,               /* 0 */
  56         &preserve_uid,          /* 1 */
  57         &preserve_gid,          /* 2 */
  58         &preserve_links,        /* 3 */
  59         &preserve_devices,      /* 4 */
  60         &preserve_hard_links,   /* 5 */
  61         &always_checksum,       /* 6 */
  62         &xfer_dirs,             /* 7 (protocol 29) */
  63         &do_compression,        /* 8 (protocol 29) */
  64         &tweaked_iconv,         /* 9  (protocol 30) */
  65         &preserve_acls,         /* 10 (protocol 30) */
  66         &preserve_xattrs,       /* 11 (protocol 30) */
  67         &inplace,               /* 12 (protocol 30) */
  68         &tweaked_append,        /* 13 (protocol 30) */
  69         &tweaked_append_verify, /* 14 (protocol 30) */
  70         NULL
  71 };
  72
  73 static char *flag_name[] = {
  74         "--recurse (-r)",
  75         "--owner (-o)",
  76         "--group (-g)",
  77         "--links (-l)",
  78         "--devices (-D)",
  79         "--hard-links (-H)",
  80         "--checksum (-c)",
  81         "--dirs (-d)",
  82         "--compress (-z)",
  83         "--iconv",
  84         "--acls (-A)",
  85         "--xattrs (-X)",
  86         "--inplace",
  87         "--append",
  88         "--append-verify",
  89         NULL
  90 };
  91
  92 void write_stream_flags(int fd)
  93 {
  94         int i, flags;
  95
  96         tweaked_append = append_mode == 1;
  97         tweaked_append_verify = append_mode == 2;
  98 #ifdef ICONV_OPTION
  99         tweaked_iconv = iconv_opt != NULL;
 100 #endif
 101
 102         /* Start the batch file with a bitmap of data-stream-affecting
 103          * flags. */
 104         for (i = 0, flags = 0; flag_ptr[i]; i++) {
 105                 if (*flag_ptr[i])
 106                         flags |= 1 << i;
 107         }
 108         write_int(fd, flags);
 109 }
 110
 111 void read_stream_flags(int fd)
 112 {
 113         batch_stream_flags = read_int(fd);
 114 }
 115
 116 void check_batch_flags(void)
 117 {
 118         int i;
 119
 120         if (protocol_version < 29)
 121                 flag_ptr[7] = NULL;
 122         else if (protocol_version < 30)
 123                 flag_ptr[9] = NULL;
 124         tweaked_append = append_mode == 1;
 125         tweaked_append_verify = append_mode == 2;
 126 #ifdef ICONV_OPTION
 127         tweaked_iconv = iconv_opt != NULL;
 128 #endif
 129         for (i = 0; flag_ptr[i]; i++) {
 130                 int set = batch_stream_flags & (1 << i) ? 1 : 0;
 131                 if (*flag_ptr[i] != set) {
 132                         if (i == 9) {
 133                                 rprintf(FERROR,
 134                                         "%s specify the --iconv option to use this batch file.\n",
 135                                         set ? "Please" : "Do not");
 136                                 exit_cleanup(RERR_SYNTAX);
 137                         }
 138                         if (verbose) {
 139                                 rprintf(FINFO,
 140                                         "%sing the %s option to match the batchfile.\n",
 141                                         set ? "Sett" : "Clear", flag_name[i]);
 142                         }
 143                         *flag_ptr[i] = set;
 144                 }
 145         }
 146         if (protocol_version < 29) {
 147                 if (recurse)
 148                         xfer_dirs |= 1;
 149                 else if (xfer_dirs < 2)
 150                         xfer_dirs = 0;
 151         }
 152
 153         if (tweaked_append)
 154                 append_mode = 1;
 155         else if (tweaked_append_verify)
 156                 append_mode = 2;
 157 }
 158
 159 static void write_arg(int fd, char *arg)
 160 {
 161         char *x, *s;
 162
 163         if (*arg == '-' && (x = strchr(arg, '=')) != NULL) {
 164                 write(fd, arg, x - arg + 1);
 165                 arg += x - arg + 1;
 166         }
 167
 168         if (strpbrk(arg, " \"'&;|[]()$#!*?^\\") != NULL) {
 169                 write(fd, "'", 1);
 170                 for (s = arg; (x = strchr(s, '\'')) != NULL; s = x + 1) {
 171                         write(fd, s, x - s + 1);
 172                         write(fd, "'", 1);
 173                 }
 174                 write(fd, s, strlen(s));
 175                 write(fd, "'", 1);
 176                 return;
 177         }
 178
 179         write(fd, arg, strlen(arg));
 180 }
 181
 182 static void write_filter_rules(int fd)
 183 {
 184         struct filter_struct *ent;
 185
 186         write_sbuf(fd, " <<'#E#'\n");
 187         for (ent = filter_list.head; ent; ent = ent->next) {
 188                 unsigned int plen;
 189                 char *p = get_rule_prefix(ent->match_flags, "- ", 0, &plen);
 190                 write_buf(fd, p, plen);
 191                 write_sbuf(fd, ent->pattern);
 192                 if (ent->match_flags & MATCHFLG_DIRECTORY)
 193                         write_byte(fd, '/');
 194                 write_byte(fd, eol_nulls ? 0 : '\n');
 195         }
 196         if (eol_nulls)
 197                 write_sbuf(fd, ";\n");
 198         write_sbuf(fd, "#E#");
 199 }
 200
 201 /* This routine tries to write out an equivalent --read-batch command
 202  * given the user's --write-batch args.  However, it doesn't really
 203  * understand most of the options, so it uses some overly simple
 204  * heuristics to munge the command line into something that will
 205  * (hopefully) work. */
 206 void write_batch_shell_file(int argc, char *argv[], int file_arg_cnt)
 207 {
 208         int fd, i, len;
 209         char *p, filename[MAXPATHLEN];
 210
 211         stringjoin(filename, sizeof filename,
 212                    batch_name, ".sh", NULL);
 213         fd = do_open(filename, O_WRONLY | O_CREAT | O_TRUNC,
 214                      S_IRUSR | S_IWUSR | S_IEXEC);
 215         if (fd < 0) {
 216                 rsyserr(FERROR, errno, "Batch file %s open error",
 217                         filename);
 218                 exit_cleanup(RERR_FILESELECT);
 219         }
 220
 221         /* Write argvs info to BATCH.sh file */
 222         write_arg(fd, argv[0]);
 223         if (filter_list.head) {
 224                 if (protocol_version >= 29)
 225                         write_sbuf(fd, " --filter=._-");
 226                 else
 227                         write_sbuf(fd, " --exclude-from=-");
 228         }
 229         for (i = 1; i < argc - file_arg_cnt; i++) {
 230                 p = argv[i];
 231                 if (strncmp(p, "--files-from", 12) == 0
 232                     || strncmp(p, "--filter", 8) == 0
 233                     || strncmp(p, "--include", 9) == 0
 234                     || strncmp(p, "--exclude", 9) == 0) {
 235                         if (strchr(p, '=') == NULL)
 236                                 i++;
 237                         continue;
 238                 }
 239                 if (strcmp(p, "-f") == 0) {
 240                         i++;
 241                         continue;
 242                 }
 243                 write(fd, " ", 1);
 244                 if (strncmp(p, "--write-batch", len = 13) == 0
 245                  || strncmp(p, "--only-write-batch", len = 18) == 0) {
 246                         write(fd, "--read-batch", 12);
 247                         if (p[len] == '=') {
 248                                 write(fd, "=", 1);
 249                                 write_arg(fd, p + len + 1);
 250                         }
 251                 } else
 252                         write_arg(fd, p);
 253         }
 254         if (!(p = check_for_hostspec(argv[argc - 1], &p, &i)))
 255                 p = argv[argc - 1];
 256         write(fd, " ${1:-", 6);
 257         write_arg(fd, p);
 258         write_byte(fd, '}');
 259         if (filter_list.head)
 260                 write_filter_rules(fd);
 261         if (write(fd, "\n", 1) != 1 || close(fd) < 0) {
 262                 rsyserr(FERROR, errno, "Batch file %s write error",
 263                         filename);
 264                 exit_cleanup(RERR_FILEIO);
 265         }
 266 }