mirror of
https://github.com/transmission/transmission
synced 2024-12-23 16:24:02 +00:00
361 lines
9.7 KiB
C
361 lines
9.7 KiB
C
/*
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* This file Copyright (C) 2012-2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#include <stdio.h> /* fprintf () */
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#include <string.h> /* strlen (), strstr (), strcmp () */
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#include <stdlib.h> /* EXIT_FAILURE */
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#include <event2/buffer.h>
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#include <libtransmission/transmission.h>
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#include <libtransmission/error.h>
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#include <libtransmission/tr-getopt.h>
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#include <libtransmission/utils.h>
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#include <libtransmission/variant.h>
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#include <libtransmission/version.h>
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#define MY_NAME "transmission-edit"
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static int fileCount = 0;
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static bool showVersion = false;
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static const char ** files = NULL;
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static const char * add = NULL;
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static const char * deleteme = NULL;
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static const char * replace[2] = { NULL, NULL };
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static tr_option options[] =
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{
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{ 'a', "add", "Add a tracker's announce URL", "a", 1, "<url>" },
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{ 'd', "delete", "Delete a tracker's announce URL", "d", 1, "<url>" },
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{ 'r', "replace", "Search and replace a substring in the announce URLs", "r", 1, "<old> <new>" },
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{ 'V', "version", "Show version number and exit", "V", 0, NULL },
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{ 0, NULL, NULL, NULL, 0, NULL }
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};
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static const char *
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getUsage (void)
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{
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return "Usage: " MY_NAME " [options] torrent-file(s)";
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}
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static int
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parseCommandLine (int argc, const char * const * argv)
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{
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int c;
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const char * optarg;
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while ((c = tr_getopt (getUsage (), argc, argv, options, &optarg)))
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{
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switch (c)
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{
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case 'a':
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add = optarg;
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break;
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case 'd':
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deleteme = optarg;
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break;
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case 'r':
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replace[0] = optarg;
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c = tr_getopt (getUsage (), argc, argv, options, &optarg);
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if (c != TR_OPT_UNK)
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return 1;
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replace[1] = optarg;
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break;
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case 'V':
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showVersion = true;
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break;
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case TR_OPT_UNK:
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files[fileCount++] = optarg;
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break;
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default:
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return 1;
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}
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}
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return 0;
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}
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static bool
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removeURL (tr_variant * metainfo, const char * url)
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{
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const char * str;
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tr_variant * announce_list;
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bool changed = false;
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if (tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL) && strcmp (str, url) == 0)
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{
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printf ("\tRemoved \"%s\" from \"announce\"\n", str);
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tr_variantDictRemove (metainfo, TR_KEY_announce);
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changed = true;
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}
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if (tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list))
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{
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tr_variant * tier;
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int tierIndex = 0;
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while ((tier = tr_variantListChild (announce_list, tierIndex)))
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{
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tr_variant * node;
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int nodeIndex = 0;
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while ((node = tr_variantListChild (tier, nodeIndex)))
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{
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if (tr_variantGetStr (node, &str, NULL) && strcmp (str, url) == 0)
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{
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printf ("\tRemoved \"%s\" from \"announce-list\" tier #%d\n", str, (tierIndex+1));
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tr_variantListRemove (tier, nodeIndex);
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changed = true;
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}
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else ++nodeIndex;
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}
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if (tr_variantListSize (tier) == 0)
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{
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printf ("\tNo URLs left in tier #%d... removing tier\n", (tierIndex+1));
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tr_variantListRemove (announce_list, tierIndex);
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}
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else
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{
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++tierIndex;
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}
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}
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if (tr_variantListSize (announce_list) == 0)
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{
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printf ("\tNo tiers left... removing announce-list\n");
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tr_variantDictRemove (metainfo, TR_KEY_announce_list);
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}
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}
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/* if we removed the "announce" field and there's still another track left,
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* use it as the "announce" field */
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if (changed && !tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL))
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{
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tr_variant * tier;
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tr_variant * node;
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if ((tier = tr_variantListChild (announce_list, 0)))
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{
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if ((node = tr_variantListChild (tier, 0)))
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{
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if (tr_variantGetStr (node, &str, NULL))
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{
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tr_variantDictAddStr (metainfo, TR_KEY_announce, str);
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printf ("\tAdded \"%s\" to announce\n", str);
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}
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}
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}
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}
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return changed;
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}
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static char*
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replaceSubstr (const char * str, const char * in, const char * out)
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{
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char * walk;
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struct evbuffer * buf = evbuffer_new ();
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const size_t inlen = strlen (in);
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const size_t outlen = strlen (out);
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while ((walk = strstr (str, in)))
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{
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evbuffer_add (buf, str, walk-str);
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evbuffer_add (buf, out, outlen);
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str = walk + inlen;
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}
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evbuffer_add (buf, str, strlen (str));
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return evbuffer_free_to_str (buf, NULL);
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}
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static bool
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replaceURL (tr_variant * metainfo, const char * in, const char * out)
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{
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const char * str;
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tr_variant * announce_list;
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bool changed = false;
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if (tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL) && strstr (str, in))
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{
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char * newstr = replaceSubstr (str, in, out);
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printf ("\tReplaced in \"announce\": \"%s\" --> \"%s\"\n", str, newstr);
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tr_variantDictAddStr (metainfo, TR_KEY_announce, newstr);
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tr_free (newstr);
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changed = true;
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}
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if (tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list))
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{
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tr_variant * tier;
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int tierCount = 0;
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while ((tier = tr_variantListChild (announce_list, tierCount++)))
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{
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tr_variant * node;
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int nodeCount = 0;
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while ((node = tr_variantListChild (tier, nodeCount++)))
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{
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if (tr_variantGetStr (node, &str, NULL) && strstr (str, in))
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{
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char * newstr = replaceSubstr (str, in, out);
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printf ("\tReplaced in \"announce-list\" tier %d: \"%s\" --> \"%s\"\n", tierCount, str, newstr);
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tr_variantFree (node);
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tr_variantInitStr (node, newstr, TR_BAD_SIZE);
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tr_free (newstr);
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changed = true;
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}
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}
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}
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}
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return changed;
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}
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static bool
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announce_list_has_url (tr_variant * announce_list, const char * url)
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{
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tr_variant * tier;
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int tierCount = 0;
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while ((tier = tr_variantListChild (announce_list, tierCount++)))
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{
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tr_variant * node;
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const char * str;
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int nodeCount = 0;
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while ((node = tr_variantListChild (tier, nodeCount++)))
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if (tr_variantGetStr (node, &str, NULL) && strcmp (str, url) == 0)
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return true;
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}
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return false;
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}
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static bool
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addURL (tr_variant * metainfo, const char * url)
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{
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const char * announce = NULL;
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tr_variant * announce_list = NULL;
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bool changed = false;
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const bool had_announce = tr_variantDictFindStr (metainfo, TR_KEY_announce, &announce, NULL);
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const bool had_announce_list = tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list);
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if (!had_announce && !had_announce_list)
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{
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/* this new tracker is the only one, so add it to "announce"... */
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printf ("\tAdded \"%s\" in \"announce\"\n", url);
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tr_variantDictAddStr (metainfo, TR_KEY_announce, url);
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changed = true;
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}
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else
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{
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if (!had_announce_list)
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{
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announce_list = tr_variantDictAddList (metainfo, TR_KEY_announce_list, 2);
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if (had_announce)
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{
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/* we're moving from an 'announce' to an 'announce-list',
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* so copy the old announce URL to the list */
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tr_variant * tier = tr_variantListAddList (announce_list, 1);
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tr_variantListAddStr (tier, announce);
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changed = true;
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}
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}
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/* If the user-specified URL isn't in the announce list yet, add it */
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if (!announce_list_has_url (announce_list, url))
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{
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tr_variant * tier = tr_variantListAddList (announce_list, 1);
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tr_variantListAddStr (tier, url);
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printf ("\tAdded \"%s\" to \"announce-list\" tier %zu\n", url, tr_variantListSize (announce_list));
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changed = true;
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}
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}
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return changed;
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}
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int
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tr_main (int argc,
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char * argv[])
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{
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int i;
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int changedCount = 0;
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files = tr_new0 (const char*, argc);
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tr_logSetLevel (TR_LOG_ERROR);
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if (parseCommandLine (argc, (const char* const *)argv))
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return EXIT_FAILURE;
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if (showVersion)
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{
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fprintf (stderr, MY_NAME" "LONG_VERSION_STRING"\n");
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return EXIT_SUCCESS;
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}
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if (fileCount < 1)
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{
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fprintf (stderr, "ERROR: No torrent files specified.\n");
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tr_getopt_usage (MY_NAME, getUsage (), options);
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fprintf (stderr, "\n");
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return EXIT_FAILURE;
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}
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if (!add && !deleteme && !replace[0])
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{
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fprintf (stderr, "ERROR: Must specify -a, -d or -r\n");
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tr_getopt_usage (MY_NAME, getUsage (), options);
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fprintf (stderr, "\n");
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return EXIT_FAILURE;
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}
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for (i=0; i<fileCount; ++i)
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{
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tr_variant top;
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bool changed = false;
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const char * filename = files[i];
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tr_error * error = NULL;
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printf ("%s\n", filename);
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if (!tr_variantFromFile (&top, TR_VARIANT_FMT_BENC, filename, &error))
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{
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printf ("\tError reading file: %s\n", error->message);
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tr_error_free (error);
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continue;
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}
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if (deleteme != NULL)
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changed |= removeURL (&top, deleteme);
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if (add != NULL)
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changed = addURL (&top, add);
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if (replace[0] && replace[1])
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changed |= replaceURL (&top, replace[0], replace[1]);
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if (changed)
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{
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++changedCount;
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tr_variantToFile (&top, TR_VARIANT_FMT_BENC, filename);
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}
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tr_variantFree (&top);
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}
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printf ("Changed %d files\n", changedCount);
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tr_free (files);
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return EXIT_SUCCESS;
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}
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