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) 2004-2009 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 int write_arg(int fd, char *arg)
 160 {
 161         char *x, *s;
 162         int len, ret = 0;
 163
 164         if (*arg == '-' && (x = strchr(arg, '=')) != NULL) {
 165                 if (write(fd, arg, x - arg + 1) != x - arg + 1)
 166                         ret = -1;
 167                 arg += x - arg + 1;
 168         }
 169
 170         if (strpbrk(arg, " \"'&;|[]()$#!*?^\\") != NULL) {
 171                 if (write(fd, "'", 1) != 1)
 172                         ret = -1;
 173                 for (s = arg; (x = strchr(s, '\'')) != NULL; s = x + 1) {
 174                         if (write(fd, s, x - s + 1) != x - s + 1
 175                          || write(fd, "'", 1) != 1)
 176                                 ret = -1;
 177                 }
 178                 len = strlen(s);
 179                 if (write(fd, s, len) != len
 180                  || write(fd, "'", 1) != 1)
 181                         ret = -1;
 182                 return ret;
 183         }
 184
 185         len = strlen(arg);
 186         if (write(fd, arg, len) != len)
 187                 ret = -1;
 188
 189         return ret;
 190 }
 191
 192 static void write_filter_rules(int fd)
 193 {
 194         struct filter_struct *ent;
 195
 196         write_sbuf(fd, " <<'#E#'\n");
 197         for (ent = filter_list.head; ent; ent = ent->next) {
 198                 unsigned int plen;
 199                 char *p = get_rule_prefix(ent->match_flags, "- ", 0, &plen);
 200                 write_buf(fd, p, plen);
 201                 write_sbuf(fd, ent->pattern);
 202                 if (ent->match_flags & MATCHFLG_DIRECTORY)
 203                         write_byte(fd, '/');
 204                 write_byte(fd, eol_nulls ? 0 : '\n');
 205         }
 206         if (eol_nulls)
 207                 write_sbuf(fd, ";\n");
 208         write_sbuf(fd, "#E#");
 209 }
 210
 211 /* This routine tries to write out an equivalent --read-batch command
 212  * given the user's --write-batch args.  However, it doesn't really
 213  * understand most of the options, so it uses some overly simple
 214  * heuristics to munge the command line into something that will
 215  * (hopefully) work. */
 216 void write_batch_shell_file(int argc, char *argv[], int file_arg_cnt)
 217 {
 218         int fd, i, len, err = 0;
 219         char *p, filename[MAXPATHLEN];
 220
 221         stringjoin(filename, sizeof filename,
 222                    batch_name, ".sh", NULL);
 223         fd = do_open(filename, O_WRONLY | O_CREAT | O_TRUNC,
 224                      S_IRUSR | S_IWUSR | S_IEXEC);
 225         if (fd < 0) {
 226                 rsyserr(FERROR, errno, "Batch file %s open error",
 227                         filename);
 228                 exit_cleanup(RERR_FILESELECT);
 229         }
 230
 231         /* Write argvs info to BATCH.sh file */
 232         if (write_arg(fd, argv[0]) < 0)
 233                 err = 1;
 234         if (filter_list.head) {
 235                 if (protocol_version >= 29)
 236                         write_sbuf(fd, " --filter=._-");
 237                 else
 238                         write_sbuf(fd, " --exclude-from=-");
 239         }
 240         for (i = 1; i < argc - file_arg_cnt; i++) {
 241                 p = argv[i];
 242                 if (strncmp(p, "--files-from", 12) == 0
 243                     || strncmp(p, "--filter", 8) == 0
 244                     || strncmp(p, "--include", 9) == 0
 245                     || strncmp(p, "--exclude", 9) == 0) {
 246                         if (strchr(p, '=') == NULL)
 247                                 i++;
 248                         continue;
 249                 }
 250                 if (strcmp(p, "-f") == 0) {
 251                         i++;
 252                         continue;
 253                 }
 254                 if (write(fd, " ", 1) != 1)
 255                         err = 1;
 256                 if (strncmp(p, "--write-batch", len = 13) == 0
 257                  || strncmp(p, "--only-write-batch", len = 18) == 0) {
 258                         if (write(fd, "--read-batch", 12) != 12)
 259                                 err = 1;
 260                         if (p[len] == '=') {
 261                                 if (write(fd, "=", 1) != 1
 262                                  || write_arg(fd, p + len + 1) < 0)
 263                                         err = 1;
 264                         }
 265                 } else {
 266                         if (write_arg(fd, p) < 0)
 267                                 err = 1;
 268                 }
 269         }
 270         if (!(p = check_for_hostspec(argv[argc - 1], &p, &i)))
 271                 p = argv[argc - 1];
 272         if (write(fd, " ${1:-", 6) != 6
 273          || write_arg(fd, p) < 0)
 274                 err = 1;
 275         write_byte(fd, '}');
 276         if (filter_list.head)
 277                 write_filter_rules(fd);
 278         if (write(fd, "\n", 1) != 1 || close(fd) < 0 || err) {
 279                 rsyserr(FERROR, errno, "Batch file %s write error",
 280                         filename);
 281                 exit_cleanup(RERR_FILEIO);
 282         }
 283 }