usage.c

   1 /*
   2  * Some usage & version related functions.
   3  *
   4  * Copyright (C) 2002-2022 Wayne Davison
   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 3 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 along
  17  * with this program; if not, visit the http://fsf.org website.
  18  */
  19
  20 #include "rsync.h"
  21 #include "version.h"
  22 #include "latest-year.h"
  23 #include "git-version.h"
  24 #include "default-cvsignore.h"
  25 #include "itypes.h"
  26
  27 extern struct name_num_obj valid_checksums, valid_compressions, valid_auth_checksums;
  28
  29 static char *istring(const char *fmt, int val)
  30 {
  31         char *str;
  32         if (asprintf(&str, fmt, val) < 0)
  33                 out_of_memory("istring");
  34         return str;
  35 }
  36
  37 static void print_info_flags(enum logcode f)
  38 {
  39         STRUCT_STAT *dumstat;
  40         BOOL as_json = f == FNONE ? 1 : 0; /* We use 1 == first attribute, 2 == need closing array */
  41         char line_buf[75], item_buf[32];
  42         int line_len, j;
  43         char *info_flags[] = {
  44
  45         "*Capabilities",
  46
  47                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
  48                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
  49                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
  50                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
  51
  52 #ifndef HAVE_SOCKETPAIR
  53                 "no "
  54 #endif
  55                         "socketpairs",
  56
  57 #ifndef SUPPORT_LINKS
  58                 "no "
  59 #endif
  60                         "symlinks",
  61
  62 #ifndef CAN_SET_SYMLINK_TIMES
  63                 "no "
  64 #endif
  65                         "symtimes",
  66
  67 #ifndef SUPPORT_HARD_LINKS
  68                 "no "
  69 #endif
  70                         "hardlinks",
  71
  72 #ifndef CAN_HARDLINK_SPECIAL
  73                 "no "
  74 #endif
  75                         "hardlink-specials",
  76
  77 #ifndef CAN_HARDLINK_SYMLINK
  78                 "no "
  79 #endif
  80                         "hardlink-symlinks",
  81
  82 #ifndef INET6
  83                 "no "
  84 #endif
  85                         "IPv6",
  86
  87 #ifndef SUPPORT_ATIMES
  88                 "no "
  89 #endif
  90                         "atimes",
  91
  92                 "batchfiles",
  93
  94 #ifndef HAVE_FTRUNCATE
  95                 "no "
  96 #endif
  97                         "inplace",
  98
  99 #ifndef HAVE_FTRUNCATE
 100                 "no "
 101 #endif
 102                         "append",
 103
 104 #ifndef SUPPORT_ACLS
 105                 "no "
 106 #endif
 107                         "ACLs",
 108
 109 #ifndef SUPPORT_XATTRS
 110                 "no "
 111 #endif
 112                         "xattrs",
 113
 114 #ifdef RSYNC_USE_SECLUDED_ARGS
 115                 "default "
 116 #else
 117                 "optional "
 118 #endif
 119                         "secluded-args",
 120
 121 #ifndef ICONV_OPTION
 122                 "no "
 123 #endif
 124                         "iconv",
 125
 126 #ifndef SUPPORT_PREALLOCATION
 127                 "no "
 128 #endif
 129                         "prealloc",
 130
 131 #ifndef HAVE_MKTIME
 132                 "no "
 133 #endif
 134                         "stop-at",
 135
 136 #ifndef SUPPORT_CRTIMES
 137                 "no "
 138 #endif
 139                         "crtimes",
 140
 141         "*Optimizations",
 142
 143 #ifndef USE_ROLL_SIMD
 144                 "no "
 145 #endif
 146                         "SIMD-roll",
 147
 148 #ifndef USE_ROLL_ASM
 149                 "no "
 150 #endif
 151                         "asm-roll",
 152
 153 #ifndef USE_OPENSSL
 154                 "no "
 155 #endif
 156                         "openssl-crypto",
 157
 158 #ifndef USE_MD5_ASM
 159                 "no "
 160 #endif
 161                         "asm-MD5",
 162
 163                 NULL
 164         };
 165
 166         for (line_len = 0, j = 0; ; j++) {
 167                 char *str = info_flags[j], *next_nfo = str ? info_flags[j+1] : NULL;
 168                 int need_comma = next_nfo && *next_nfo != '*' ? 1 : 0;
 169                 int item_len;
 170                 if (!str || *str == '*')
 171                         item_len = 1000;
 172                 else if (as_json) {
 173                         char *space = strchr(str, ' ');
 174                         int is_no = space && strncmp(str, "no ", 3) == 0;
 175                         char *quot = space && !is_no ? "\"" : "";
 176                         char *item = space ? space + 1 : str;
 177                         char *val = !space ? "true" : is_no ? "false" : str;
 178                         int val_len = !space ? 4 : is_no ? 5 : space - str;
 179                         item_len = snprintf(item_buf, sizeof item_buf,
 180                                            " \"%s\": %s%.*s%s%s", item, quot, val_len, val, quot,
 181                                            need_comma ? "," : "");
 182                         for (space = item; (space = strchr(space, ' ')) != NULL; space++)
 183                                 item_buf[space - item + 2] = '_';
 184                 } else
 185                         item_len = snprintf(item_buf, sizeof item_buf, " %s%s", str, need_comma ? "," : "");
 186                 if (line_len && line_len + item_len >= (int)sizeof line_buf) {
 187                         if (as_json)
 188                                 printf("   %s\n", line_buf);
 189                         else
 190                                 rprintf(f, "   %s\n", line_buf);
 191                         line_len = 0;
 192                 }
 193                 if (!str)
 194                         break;
 195                 if (*str == '*') {
 196                         if (as_json) {
 197                                 if (as_json == 2)
 198                                         printf("  }");
 199                                 else
 200                                         as_json = 2;
 201                                 printf(",\n  \"%c%s\": {\n", toLower(str+1), str+2);
 202                         } else
 203                                 rprintf(f, "%s:\n", str+1);
 204                 } else {
 205                         strlcpy(line_buf + line_len, item_buf, sizeof line_buf - line_len);
 206                         line_len += item_len;
 207                 }
 208         }
 209         if (as_json == 2)
 210                 printf("  }");
 211 }
 212
 213 static void output_nno_list(enum logcode f, const char *name, struct name_num_obj *nno)
 214 {
 215         char namebuf[64], tmpbuf[256];
 216         char *tok, *next_tok, *comma = ",";
 217         char *cp;
 218
 219         /* Using '(' ensures that we get a trailing "none" but also includes aliases. */
 220         get_default_nno_list(nno, tmpbuf, sizeof tmpbuf - 1, '(');
 221         if (f != FNONE) {
 222                 rprintf(f, "%s:\n", name);
 223                 rprintf(f, "    %s\n", tmpbuf);
 224                 return;
 225         }
 226
 227         strlcpy(namebuf, name, sizeof namebuf);
 228         for (cp = namebuf; *cp; cp++) {
 229                 if (*cp == ' ')
 230                         *cp = '_';
 231                 else if (isUpper(cp))
 232                         *cp = toLower(cp);
 233         }
 234
 235         printf(",\n  \"%s\": [\n   ", namebuf);
 236
 237         for (tok = strtok(tmpbuf, " "); tok; tok = next_tok) {
 238                 next_tok = strtok(NULL, " ");
 239                 if (*tok != '(') /* Ignore the alises in the JSON output */
 240                         printf(" \"%s\"%s", tok, comma + (next_tok ? 0 : 1));
 241         }
 242
 243         printf("\n  ]");
 244 }
 245
 246 /* A request of f == FNONE wants json on stdout. */
 247 void print_rsync_version(enum logcode f)
 248 {
 249         char copyright[] = "(C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.";
 250         char url[] = "https://rsync.samba.org/";
 251         BOOL first_line = 1;
 252
 253 #define json_line(name, value) \
 254         do { \
 255                 printf("%c\n  \"%s\": \"%s\"", first_line ? '{' : ',', name, value); \
 256                 first_line = 0; \
 257         } while (0)
 258
 259         if (f == FNONE) {
 260                 char verbuf[32];
 261                 json_line("program", RSYNC_NAME);
 262                 json_line("version", rsync_version());
 263                 snprintf(verbuf, sizeof verbuf, "%d.%d", PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
 264                 json_line("protocol", verbuf);
 265                 json_line("copyright", copyright);
 266                 json_line("url", url);
 267         } else {
 268 #if SUBPROTOCOL_VERSION != 0
 269                 char *subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 270 #else
 271                 char *subprotocol = "";
 272 #endif
 273                 rprintf(f, "%s  version %s  protocol version %d%s\n",
 274                         RSYNC_NAME, rsync_version(), PROTOCOL_VERSION, subprotocol);
 275                 rprintf(f, "Copyright %s\n", copyright);
 276                 rprintf(f, "Web site: %s\n", url);
 277         }
 278
 279         print_info_flags(f);
 280
 281         init_checksum_choices();
 282
 283         output_nno_list(f, "Checksum list", &valid_checksums);
 284         output_nno_list(f, "Compress list", &valid_compressions);
 285         output_nno_list(f, "Daemon auth list", &valid_auth_checksums);
 286
 287         if (f == FNONE) {
 288                 json_line("license", "GPL3");
 289                 json_line("caveat", "rsync comes with ABSOLUTELY NO WARRANTY");
 290                 printf("\n}\n");
 291                 return;
 292         }
 293
 294 #ifdef MAINTAINER_MODE
 295         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 296 #endif
 297
 298 #if SIZEOF_INT64 < 8
 299         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 300 #endif
 301         if (sizeof (int64) != SIZEOF_INT64) {
 302                 rprintf(f,
 303                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 304                         (int) SIZEOF_INT64, (int) sizeof (int64));
 305         }
 306
 307         rprintf(f,"\n");
 308         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 309         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 310         rprintf(f,"General Public Licence for details.\n");
 311 }
 312
 313 void usage(enum logcode F)
 314 {
 315   print_rsync_version(F);
 316
 317   rprintf(F,"\n");
 318   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 319   rprintf(F,"via a fast differencing algorithm.\n");
 320
 321   rprintf(F,"\n");
 322   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 323   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 324   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 325   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 326   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 327   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 328   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 329   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 330   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 331   rprintf(F,"\n");
 332   rprintf(F,"Options\n");
 333 #include "help-rsync.h"
 334   rprintf(F,"\n");
 335   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 336   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) manpages for full documentation.\n");
 337   rprintf(F,"See https://rsync.samba.org/ for updates, bug reports, and answers\n");
 338 }
 339
 340 void daemon_usage(enum logcode F)
 341 {
 342   print_rsync_version(F);
 343
 344   rprintf(F,"\n");
 345   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
 346 #include "help-rsyncd.h"
 347   rprintf(F,"\n");
 348   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
 349   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) manpage.\n");
 350 }
 351
 352 const char *rsync_version(void)
 353 {
 354         char *ver;
 355 #ifdef RSYNC_GITVER
 356         ver = RSYNC_GITVER;
 357 #else
 358         ver = RSYNC_VERSION;
 359 #endif
 360         return *ver == 'v' ? ver+1 : ver;
 361 }
 362
 363 const char *default_cvsignore(void)
 364 {
 365         return DEFAULT_CVSIGNORE;
 366 }