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transmission/utils/edit.c

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/*
* This file Copyright (C) 2012-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
* $Id$
*/
#include <stdio.h> /* fprintf () */
#include <string.h> /* strlen (), strstr (), strcmp () */
#include <stdlib.h> /* EXIT_FAILURE */
#include <event2/buffer.h>
#include <libtransmission/transmission.h>
#include <libtransmission/tr-getopt.h>
#include <libtransmission/utils.h>
#include <libtransmission/variant.h>
#include <libtransmission/version.h>
#define MY_NAME "transmission-edit"
static int fileCount = 0;
static bool showVersion = false;
static const char ** files = NULL;
static const char * add = NULL;
static const char * deleteme = NULL;
static const char * replace[2] = { NULL, NULL };
static tr_option options[] =
{
{ 'a', "add", "Add a tracker's announce URL", "a", 1, "<url>" },
{ 'd', "delete", "Delete a tracker's announce URL", "d", 1, "<url>" },
{ 'r', "replace", "Search and replace a substring in the announce URLs", "r", 1, "<old> <new>" },
{ 'V', "version", "Show version number and exit", "V", 0, NULL },
{ 0, NULL, NULL, NULL, 0, NULL }
};
static const char *
getUsage (void)
{
return "Usage: " MY_NAME " [options] torrent-file(s)";
}
static int
parseCommandLine (int argc, const char ** argv)
{
int c;
const char * optarg;
while ((c = tr_getopt (getUsage (), argc, argv, options, &optarg)))
{
switch (c)
{
case 'a':
add = optarg;
break;
case 'd':
deleteme = optarg;
break;
case 'r':
replace[0] = optarg;
c = tr_getopt (getUsage (), argc, argv, options, &optarg);
if (c != TR_OPT_UNK)
return 1;
replace[1] = optarg;
break;
case 'V':
showVersion = true;
break;
case TR_OPT_UNK:
files[fileCount++] = optarg;
break;
default:
return 1;
}
}
return 0;
}
static bool
removeURL (tr_variant * metainfo, const char * url)
{
const char * str;
tr_variant * announce_list;
bool changed = false;
if (tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL) && !strcmp (str, url))
{
printf ("\tRemoved \"%s\" from \"announce\"\n", str);
tr_variantDictRemove (metainfo, TR_KEY_announce);
changed = true;
}
if (tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list))
{
tr_variant * tier;
int tierIndex = 0;
while ((tier = tr_variantListChild (announce_list, tierIndex)))
{
tr_variant * node;
int nodeIndex = 0;
while ((node = tr_variantListChild (tier, nodeIndex)))
{
if (tr_variantGetStr (node, &str, NULL) && !strcmp (str, url))
{
printf ("\tRemoved \"%s\" from \"announce-list\" tier #%d\n", str, (tierIndex+1));
tr_variantListRemove (tier, nodeIndex);
changed = true;
}
else ++nodeIndex;
}
if (tr_variantListSize (tier) == 0)
{
printf ("\tNo URLs left in tier #%d... removing tier\n", (tierIndex+1));
tr_variantListRemove (announce_list, tierIndex);
}
else
{
++tierIndex;
}
}
if (tr_variantListSize (announce_list) == 0)
{
printf ("\tNo tiers left... removing announce-list\n");
tr_variantDictRemove (metainfo, TR_KEY_announce_list);
}
}
/* if we removed the "announce" field and there's still another track left,
* use it as the "announce" field */
if (changed && !tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL))
{
tr_variant * tier;
tr_variant * node;
if ((tier = tr_variantListChild (announce_list, 0)))
{
if ((node = tr_variantListChild (tier, 0)))
{
if (tr_variantGetStr (node, &str, NULL))
{
tr_variantDictAddStr (metainfo, TR_KEY_announce, str);
printf ("\tAdded \"%s\" to announce\n", str);
}
}
}
}
return changed;
}
static char*
replaceSubstr (const char * str, const char * in, const char * out)
{
char * walk;
struct evbuffer * buf = evbuffer_new ();
const size_t inlen = strlen (in);
const size_t outlen = strlen (out);
while ((walk = strstr (str, in)))
{
evbuffer_add (buf, str, walk-str);
evbuffer_add (buf, out, outlen);
str = walk + inlen;
}
evbuffer_add (buf, str, strlen (str));
return evbuffer_free_to_str (buf);
}
static bool
replaceURL (tr_variant * metainfo, const char * in, const char * out)
{
const char * str;
tr_variant * announce_list;
bool changed = false;
if (tr_variantDictFindStr (metainfo, TR_KEY_announce, &str, NULL) && strstr (str, in))
{
char * newstr = replaceSubstr (str, in, out);
printf ("\tReplaced in \"announce\": \"%s\" --> \"%s\"\n", str, newstr);
tr_variantDictAddStr (metainfo, TR_KEY_announce, newstr);
tr_free (newstr);
changed = true;
}
if (tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list))
{
tr_variant * tier;
int tierCount = 0;
while ((tier = tr_variantListChild (announce_list, tierCount++)))
{
tr_variant * node;
int nodeCount = 0;
while ((node = tr_variantListChild (tier, nodeCount++)))
{
if (tr_variantGetStr (node, &str, NULL) && strstr (str, in))
{
char * newstr = replaceSubstr (str, in, out);
printf ("\tReplaced in \"announce-list\" tier %d: \"%s\" --> \"%s\"\n", tierCount, str, newstr);
tr_variantFree (node);
tr_variantInitStr (node, newstr, -1);
tr_free (newstr);
changed = true;
}
}
}
}
return changed;
}
static bool
announce_list_has_url (tr_variant * announce_list, const char * url)
{
tr_variant * tier;
int tierCount = 0;
while ((tier = tr_variantListChild (announce_list, tierCount++)))
{
tr_variant * node;
const char * str;
int nodeCount = 0;
while ((node = tr_variantListChild (tier, nodeCount++)))
if (tr_variantGetStr (node, &str, NULL) && !strcmp (str, url))
return true;
}
return false;
}
static bool
addURL (tr_variant * metainfo, const char * url)
{
const char * announce = NULL;
tr_variant * announce_list = NULL;
bool changed = false;
const bool had_announce = tr_variantDictFindStr (metainfo, TR_KEY_announce, &announce, NULL);
const bool had_announce_list = tr_variantDictFindList (metainfo, TR_KEY_announce_list, &announce_list);
if (!had_announce && !had_announce_list)
{
/* this new tracker is the only one, so add it to "announce"... */
printf ("\tAdded \"%s\" in \"announce\"\n", url);
tr_variantDictAddStr (metainfo, TR_KEY_announce, url);
changed = true;
}
else
{
if (!had_announce_list)
{
announce_list = tr_variantDictAddList (metainfo, TR_KEY_announce_list, 2);
if (had_announce)
{
/* we're moving from an 'announce' to an 'announce-list',
* so copy the old announce URL to the list */
tr_variant * tier = tr_variantListAddList (announce_list, 1);
tr_variantListAddStr (tier, announce);
changed = true;
}
}
/* If the user-specified URL isn't in the announce list yet, add it */
if (!announce_list_has_url (announce_list, url))
{
tr_variant * tier = tr_variantListAddList (announce_list, 1);
tr_variantListAddStr (tier, url);
printf ("\tAdded \"%s\" to \"announce-list\" tier %"TR_PRIuSIZE"\n", url, tr_variantListSize (announce_list));
changed = true;
}
}
return changed;
}
int
main (int argc, char * argv[])
{
int i;
int changedCount = 0;
#ifdef _WIN32
tr_win32_make_args_utf8 (&argc, &argv);
#endif
files = tr_new0 (const char*, argc);
tr_logSetLevel (TR_LOG_ERROR);
if (parseCommandLine (argc, (const char**)argv))
return EXIT_FAILURE;
if (showVersion)
{
fprintf (stderr, MY_NAME" "LONG_VERSION_STRING"\n");
return EXIT_SUCCESS;
}
if (fileCount < 1)
{
fprintf (stderr, "ERROR: No torrent files specified.\n");
tr_getopt_usage (MY_NAME, getUsage (), options);
fprintf (stderr, "\n");
return EXIT_FAILURE;
}
if (!add && !deleteme && !replace[0])
{
fprintf (stderr, "ERROR: Must specify -a, -d or -r\n");
tr_getopt_usage (MY_NAME, getUsage (), options);
fprintf (stderr, "\n");
return EXIT_FAILURE;
}
for (i=0; i<fileCount; ++i)
{
tr_variant top;
bool changed = false;
const char * filename = files[i];
printf ("%s\n", filename);
if (tr_variantFromFile (&top, TR_VARIANT_FMT_BENC, filename))
{
printf ("\tError reading file\n");
continue;
}
if (deleteme != NULL)
changed |= removeURL (&top, deleteme);
if (add != NULL)
changed = addURL (&top, add);
if (replace[0] && replace[1])
changed |= replaceURL (&top, replace[0], replace[1]);
if (changed)
{
++changedCount;
tr_variantToFile (&top, TR_VARIANT_FMT_BENC, filename);
}
tr_variantFree (&top);
}
printf ("Changed %d files\n", changedCount);
tr_free (files);
return EXIT_SUCCESS;
}
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