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/* MiniDLNA media server
* Copyright (C) 2008-2009 Justin Maggard
*
* This file is part of MiniDLNA.
*
* MiniDLNA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* MiniDLNA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <linux/limits.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include "minidlnatypes.h"
#include "upnpglobalvars.h"
#include "log.h"
inline int
strcatf(struct string_s *str, const char *fmt, ...)
{
int ret;
size_t size;
va_list ap;
if (str->off >= str->size)
return 0;
va_start(ap, fmt);
size = str->size - str->off;
ret = vsnprintf(str->data + str->off, size, fmt, ap);
va_end(ap);
str->off += MIN(ret, size);
return ret;
}
inline void
strncpyt(char *dst, const char *src, size_t len)
{
strncpy(dst, src, len);
dst[len-1] = '\0';
}
int
ends_with(const char * haystack, const char * needle)
{
const char * end;
int nlen = strlen(needle);
int hlen = strlen(haystack);
if( nlen > hlen )
return 0;
end = haystack + hlen - nlen;
return (strcasecmp(end, needle) ? 0 : 1);
}
char *
trim(char *str)
{
int i;
int len;
if (!str)
return(NULL);
len = strlen(str);
for (i=len-1; i >= 0 && isspace(str[i]); i--)
{
str[i] = '\0';
len--;
}
while (isspace(*str))
{
str++;
len--;
}
if (str[0] == '"' && str[len-1] == '"')
{
str[0] = '\0';
str[len-1] = '\0';
str++;
}
return str;
}
/* Find the first occurrence of p in s, where s is terminated by t */
char *
strstrc(const char *s, const char *p, const char t)
{
char *endptr;
size_t slen, plen;
endptr = strchr(s, t);
if (!endptr)
return strstr(s, p);
plen = strlen(p);
slen = endptr - s;
while (slen >= plen)
{
if (*s == *p && strncmp(s+1, p+1, plen-1) == 0)
return (char*)s;
s++;
slen--;
}
return NULL;
}
char *
strcasestrc(const char *s, const char *p, const char t)
{
char *endptr;
size_t slen, plen;
endptr = strchr(s, t);
if (!endptr)
return strcasestr(s, p);
plen = strlen(p);
slen = endptr - s;
while (slen >= plen)
{
if (*s == *p && strncasecmp(s+1, p+1, plen-1) == 0)
return (char*)s;
s++;
slen--;
}
return NULL;
}
char *
modifyString(char * string, const char * before, const char * after, short like)
{
int oldlen, newlen, chgcnt = 0;
char *s, *p, *t;
oldlen = strlen(before);
newlen = strlen(after);
if( newlen+like > oldlen )
{
s = string;
while( (p = strstr(s, before)) )
{
chgcnt++;
s = p+oldlen;
}
s = realloc(string, strlen(string)+((newlen-oldlen)*chgcnt)+1+like);
/* If we failed to realloc, return the original alloc'd string */
if( s )
string = s;
else
return string;
}
s = string;
while( s )
{
p = strcasestr(s, before);
if( !p )
return string;
memmove(p + newlen, p + oldlen, strlen(p + oldlen) + 1);
memcpy(p, after, newlen);
if( like )
{
t = p+newlen;
while( isspace(*t) )
t++;
if( *t == '"' )
{
if( like == 2 )
{
memmove(t+2, t+1, strlen(t+1)+1);
*++t = '%';
}
while( *++t != '"' )
continue;
memmove(t+1, t, strlen(t)+1);
*t = '%';
}
}
s = p + newlen;
}
return string;
}
char *
escape_tag(const char *tag, int force_alloc)
{
char *esc_tag = NULL;
if( strchr(tag, '&') || strchr(tag, '<') || strchr(tag, '>') || strchr(tag, '"') )
{
esc_tag = strdup(tag);
esc_tag = modifyString(esc_tag, "&", "&amp;amp;", 0);
esc_tag = modifyString(esc_tag, "<", "&amp;lt;", 0);
esc_tag = modifyString(esc_tag, ">", "&amp;gt;", 0);
esc_tag = modifyString(esc_tag, "\"", "&amp;quot;", 0);
}
else if( force_alloc )
esc_tag = strdup(tag);
return esc_tag;
}
void
strip_ext(char * name)
{
char * period;
period = strrchr(name, '.');
if( period )
*period = '\0';
}
/* Code basically stolen from busybox */
int
make_dir(char * path, mode_t mode)
{
char * s = path;
char c;
struct stat st;
do {
c = '\0';
/* Bypass leading non-'/'s and then subsequent '/'s. */
while (*s) {
if (*s == '/') {
do {
++s;
} while (*s == '/');
c = *s; /* Save the current char */
*s = '\0'; /* and replace it with nul. */
break;
}
++s;
}
if (mkdir(path, mode) < 0) {
/* If we failed for any other reason than the directory
* already exists, output a diagnostic and return -1.*/
if (errno != EEXIST || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
DPRINTF(E_WARN, L_GENERAL, "make_dir: cannot create directory '%s'\n", path);
if (c)
*s = c;
return -1;
}
}
if (!c)
return 0;
/* Remove any inserted nul from the path. */
*s = c;
} while (1);
}
/* Simple, efficient hash function from Daniel J. Bernstein */
unsigned int
DJBHash(const char *str, int len)
{
unsigned int hash = 5381;
unsigned int i = 0;
for(i = 0; i < len; str++, i++)
{
hash = ((hash << 5) + hash) + (*str);
}
return hash;
}
int
is_video(const char * file)
{
return (ends_with(file, ".mpg") || ends_with(file, ".mpeg") ||
ends_with(file, ".avi") || ends_with(file, ".divx") ||
ends_with(file, ".asf") || ends_with(file, ".wmv") ||
ends_with(file, ".mp4") || ends_with(file, ".m4v") ||
ends_with(file, ".mts") || ends_with(file, ".m2ts") ||
ends_with(file, ".m2t") || ends_with(file, ".mkv") ||
ends_with(file, ".vob") || ends_with(file, ".ts") ||
ends_with(file, ".flv") || ends_with(file, ".xvid") ||
#ifdef TIVO_SUPPORT
ends_with(file, ".TiVo") ||
#endif
ends_with(file, ".mov") || ends_with(file, ".3gp"));
}
int
is_audio(const char * file)
{
return (ends_with(file, ".mp3") || ends_with(file, ".flac") ||
ends_with(file, ".wma") || ends_with(file, ".asf") ||
ends_with(file, ".fla") || ends_with(file, ".flc") ||
ends_with(file, ".m4a") || ends_with(file, ".aac") ||
ends_with(file, ".mp4") || ends_with(file, ".m4p") ||
ends_with(file, ".wav") || ends_with(file, ".ogg") ||
ends_with(file, ".pcm") || ends_with(file, ".3gp"));
}
int
is_image(const char * file)
{
return (ends_with(file, ".jpg") || ends_with(file, ".jpeg"));
}
int
is_playlist(const char * file)
{
return (ends_with(file, ".m3u") || ends_with(file, ".pls"));
}
int
is_album_art(const char * name)
{
struct album_art_name_s * album_art_name;
/* Check if this file name matches one of the default album art names */
for( album_art_name = album_art_names; album_art_name; album_art_name = album_art_name->next )
{
if( album_art_name->wildcard )
{
if( strncmp(album_art_name->name, name, strlen(album_art_name->name)) == 0 )
break;
}
else
{
if( strcmp(album_art_name->name, name) == 0 )
break;
}
}
return (album_art_name ? 1 : 0);
}
int
resolve_unknown_type(const char * path, enum media_types dir_type)
{
struct stat entry;
unsigned char type = TYPE_UNKNOWN;
char str_buf[PATH_MAX];
ssize_t len;
if( lstat(path, &entry) == 0 )
{
if( S_ISLNK(entry.st_mode) )
{
if( (len = readlink(path, str_buf, PATH_MAX-1)) > 0 )
{
str_buf[len] = '\0';
//DEBUG DPRINTF(E_DEBUG, L_GENERAL, "Checking for recursive symbolic link: %s (%s)\n", path, str_buf);
if( strncmp(path, str_buf, strlen(str_buf)) == 0 )
{
DPRINTF(E_DEBUG, L_GENERAL, "Ignoring recursive symbolic link: %s (%s)\n", path, str_buf);
return type;
}
}
stat(path, &entry);
}
if( S_ISDIR(entry.st_mode) )
{
type = TYPE_DIR;
}
else if( S_ISREG(entry.st_mode) )
{
switch( dir_type )
{
case ALL_MEDIA:
if( is_image(path) ||
is_audio(path) ||
is_video(path) ||
is_playlist(path) )
type = TYPE_FILE;
break;
case AUDIO_ONLY:
if( is_audio(path) ||
is_playlist(path) )
type = TYPE_FILE;
break;
case VIDEO_ONLY:
if( is_video(path) )
type = TYPE_FILE;
break;
case IMAGES_ONLY:
if( is_image(path) )
type = TYPE_FILE;
break;
default:
break;
}
}
}
return type;
}