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utils.c    309 lines (275 with data), 6.8 kB

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/* MiniDLNA media server
* Copyright (C) 2008-2009 Justin Maggard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <linux/limits.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "minidlnatypes.h"
#include "log.h"
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)
{
if (!str)
return(NULL);
int i;
for (i=0; i <= strlen(str) && (isspace(str[i]) || str[i] == '"'); i++) {
str++;
}
for (i=(strlen(str)-1); i >= 0 && (isspace(str[i]) || str[i] == '"'); i--) {
str[i] = '\0';
}
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 NULL;
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 *
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;
}
string = realloc(string, strlen(string)+((newlen-oldlen)*chgcnt)+1+like);
}
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)
{
char *esc_tag = NULL;
if( 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);
}
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))) {
break;
}
}
if (!c)
return 0;
/* Remove any inserted nul from the path. */
*s = c;
} while (1);
DPRINTF(E_WARN, L_GENERAL, "make_dir: cannot create directory '%s'\n", path);
return -1;
}
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
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;
}