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-rw-r--r--src/database.c38
-rw-r--r--src/directory_save.c45
-rw-r--r--src/directory_save.h3
-rw-r--r--src/song_save.c31
-rw-r--r--src/song_save.h2
-rw-r--r--src/text_file.c62
-rw-r--r--src/text_file.h39
7 files changed, 161 insertions, 59 deletions
diff --git a/src/database.c b/src/database.c
index 5a06dda98..dc0ef3686 100644
--- a/src/database.c
+++ b/src/database.c
@@ -23,6 +23,7 @@
#include "song.h"
#include "path.h"
#include "stats.h"
+#include "text_file.h"
#include "config.h"
#include <glib.h>
@@ -256,7 +257,8 @@ db_load(GError **error)
{
FILE *fp = NULL;
struct stat st;
- char buffer[100];
+ GString *buffer = g_string_sized_new(1024);
+ char *line;
bool found_charset = false, found_version = false;
bool success;
@@ -270,50 +272,45 @@ db_load(GError **error)
g_set_error(error, db_quark(), errno,
"Failed to open database file \"%s\": %s",
database_path, strerror(errno));
+ g_string_free(buffer, true);
return false;
}
/* get initial info */
- if (!fgets(buffer, sizeof(buffer), fp)) {
- fclose(fp);
- g_set_error(error, db_quark(), 0, "Unexpected end of file");
- return false;
- }
-
- g_strchomp(buffer);
-
- if (0 != strcmp(DIRECTORY_INFO_BEGIN, buffer)) {
+ line = read_text_line(fp, buffer);
+ if (line == NULL || strcmp(DIRECTORY_INFO_BEGIN, line) != 0) {
fclose(fp);
g_set_error(error, db_quark(), 0, "Database corrupted");
+ g_string_free(buffer, true);
return false;
}
- while (fgets(buffer, sizeof(buffer), fp) &&
- !g_str_has_prefix(buffer, DIRECTORY_INFO_END)) {
- g_strchomp(buffer);
-
- if (g_str_has_prefix(buffer, DIRECTORY_MPD_VERSION)) {
+ while ((line = read_text_line(fp, buffer)) != NULL &&
+ !g_str_has_prefix(line, DIRECTORY_INFO_END)) {
+ if (g_str_has_prefix(line, DIRECTORY_MPD_VERSION)) {
if (found_version) {
fclose(fp);
g_set_error(error, db_quark(), 0,
"Duplicate version line");
+ g_string_free(buffer, true);
return false;
}
found_version = true;
- } else if (g_str_has_prefix(buffer, DIRECTORY_FS_CHARSET)) {
+ } else if (g_str_has_prefix(line, DIRECTORY_FS_CHARSET)) {
const char *new_charset, *old_charset;
if (found_charset) {
fclose(fp);
g_set_error(error, db_quark(), 0,
"Duplicate charset line");
+ g_string_free(buffer, true);
return false;
}
found_charset = true;
- new_charset = &(buffer[strlen(DIRECTORY_FS_CHARSET)]);
+ new_charset = line + sizeof(DIRECTORY_FS_CHARSET) - 1;
old_charset = path_get_fs_charset();
if (old_charset != NULL
&& strcmp(new_charset, old_charset)) {
@@ -323,19 +320,22 @@ db_load(GError **error)
"\"%s\" instead of \"%s\"; "
"discarding database file",
new_charset, old_charset);
+ g_string_free(buffer, true);
return false;
}
} else {
fclose(fp);
g_set_error(error, db_quark(), 0,
- "Malformed line: %s", buffer);
+ "Malformed line: %s", line);
+ g_string_free(buffer, true);
return false;
}
}
g_debug("reading DB");
- success = directory_load(fp, music_root, error);
+ success = directory_load(fp, music_root, buffer, error);
+ g_string_free(buffer, true);
while (fclose(fp) && errno == EINTR) ;
if (!success)
diff --git a/src/directory_save.c b/src/directory_save.c
index f353c7c2e..ed4f0190f 100644
--- a/src/directory_save.c
+++ b/src/directory_save.c
@@ -20,7 +20,7 @@
#include "directory_save.h"
#include "directory.h"
#include "song.h"
-#include "path.h"
+#include "text_file.h"
#include "song_save.h"
#include <assert.h>
@@ -80,10 +80,10 @@ directory_save(FILE *fp, struct directory *directory)
static struct directory *
directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
- GError **error_r)
+ GString *buffer, GError **error_r)
{
- char buffer[MPD_PATH_MAX * 2];
struct directory *directory;
+ const char *line;
bool success;
if (directory_get_child(parent, name) != NULL) {
@@ -101,19 +101,21 @@ directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
g_free(path);
}
- if (!fgets(buffer, sizeof(buffer), fp)) {
+ line = read_text_line(fp, buffer);
+ if (line == NULL) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
directory_free(directory);
return NULL;
}
- if (g_str_has_prefix(buffer, DIRECTORY_MTIME)) {
+ if (g_str_has_prefix(line, DIRECTORY_MTIME)) {
directory->mtime =
- g_ascii_strtoull(buffer + sizeof(DIRECTORY_MTIME) - 1,
+ g_ascii_strtoull(line + sizeof(DIRECTORY_MTIME) - 1,
NULL, 10);
- if (!fgets(buffer, sizeof(buffer), fp)) {
+ line = read_text_line(fp, buffer);
+ if (line == NULL) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
directory_free(directory);
@@ -121,14 +123,14 @@ directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
}
}
- if (!g_str_has_prefix(buffer, DIRECTORY_BEGIN)) {
+ if (!g_str_has_prefix(line, DIRECTORY_BEGIN)) {
g_set_error(error_r, directory_quark(), 0,
- "Malformed line: %s", buffer);
+ "Malformed line: %s", line);
directory_free(directory);
return NULL;
}
- success = directory_load(fp, directory, error_r);
+ success = directory_load(fp, directory, buffer, error_r);
if (!success) {
directory_free(directory);
return NULL;
@@ -138,32 +140,31 @@ directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
}
bool
-directory_load(FILE *fp, struct directory *directory, GError **error)
+directory_load(FILE *fp, struct directory *directory,
+ GString *buffer, GError **error)
{
- char buffer[MPD_PATH_MAX * 2];
+ const char *line;
bool success;
- while (fgets(buffer, sizeof(buffer), fp)
- && !g_str_has_prefix(buffer, DIRECTORY_END)) {
- g_strchomp(buffer);
-
- if (g_str_has_prefix(buffer, DIRECTORY_DIR)) {
+ while ((line = read_text_line(fp, buffer)) != NULL &&
+ !g_str_has_prefix(line, DIRECTORY_END)) {
+ if (g_str_has_prefix(line, DIRECTORY_DIR)) {
struct directory *subdir =
directory_load_subdir(fp, directory,
- buffer + sizeof(DIRECTORY_DIR) - 1,
- error);
+ line + sizeof(DIRECTORY_DIR) - 1,
+ buffer, error);
if (subdir == NULL)
return false;
dirvec_add(&directory->children, subdir);
- } else if (g_str_has_prefix(buffer, SONG_BEGIN)) {
+ } else if (g_str_has_prefix(line, SONG_BEGIN)) {
success = songvec_load(fp, &directory->songs,
- directory, error);
+ directory, buffer, error);
if (!success)
return false;
} else {
g_set_error(error, directory_quark(), 0,
- "Malformed line: %s", buffer);
+ "Malformed line: %s", line);
return false;
}
}
diff --git a/src/directory_save.h b/src/directory_save.h
index 28ec094ad..d9daa3fed 100644
--- a/src/directory_save.h
+++ b/src/directory_save.h
@@ -31,6 +31,7 @@ int
directory_save(FILE *fp, struct directory *directory);
bool
-directory_load(FILE *fp, struct directory *directory, GError **error);
+directory_load(FILE *fp, struct directory *directory,
+ GString *buffer, GError **error);
#endif
diff --git a/src/song_save.c b/src/song_save.c
index b18057201..4b8409d86 100644
--- a/src/song_save.c
+++ b/src/song_save.c
@@ -21,8 +21,8 @@
#include "song.h"
#include "tag_save.h"
#include "directory.h"
-#include "path.h"
#include "tag.h"
+#include "text_file.h"
#include <glib.h>
@@ -117,32 +117,31 @@ parse_tag_value(char *buffer, enum tag_type *type_r)
bool
songvec_load(FILE *fp, struct songvec *sv, struct directory *parent,
- GError **error_r)
+ GString *buffer, GError **error_r)
{
- char buffer[MPD_PATH_MAX + 1024];
+ char *line;
struct song *song = NULL;
enum tag_type type;
const char *value;
- while (fgets(buffer, sizeof(buffer), fp) &&
- !g_str_has_prefix(buffer, SONG_END)) {
- g_strchomp(buffer);
+ while ((line = read_text_line(fp, buffer)) != NULL &&
+ !g_str_has_prefix(line, SONG_END)) {
- if (0 == strncmp(SONG_KEY, buffer, strlen(SONG_KEY))) {
+ if (0 == strncmp(SONG_KEY, line, strlen(SONG_KEY))) {
if (song)
commit_song(sv, song);
- song = song_file_new(buffer + strlen(SONG_KEY),
+ song = song_file_new(line + strlen(SONG_KEY),
parent);
- } else if (*buffer == 0) {
+ } else if (*line == 0) {
/* ignore empty lines (starting with '\0') */
} else if (song == NULL) {
g_set_error(error_r, song_save_quark(), 0,
"Problems reading song info");
return false;
- } else if (0 == strncmp(SONG_FILE, buffer, strlen(SONG_FILE))) {
+ } else if (0 == strncmp(SONG_FILE, line, strlen(SONG_FILE))) {
/* we don't need this info anymore */
- } else if ((value = parse_tag_value(buffer,
+ } else if ((value = parse_tag_value(line,
&type)) != NULL) {
if (!song->tag) {
song->tag = tag_new();
@@ -150,18 +149,18 @@ songvec_load(FILE *fp, struct songvec *sv, struct directory *parent,
}
tag_add_item(song->tag, type, value);
- } else if (0 == strncmp(SONG_TIME, buffer, strlen(SONG_TIME))) {
+ } else if (0 == strncmp(SONG_TIME, line, strlen(SONG_TIME))) {
if (!song->tag) {
song->tag = tag_new();
tag_begin_add(song->tag);
}
- song->tag->time = atoi(&(buffer[strlen(SONG_TIME)]));
- } else if (0 == strncmp(SONG_MTIME, buffer, strlen(SONG_MTIME))) {
- song->mtime = atoi(&(buffer[strlen(SONG_MTIME)]));
+ song->tag->time = atoi(&(line[strlen(SONG_TIME)]));
+ } else if (0 == strncmp(SONG_MTIME, line, strlen(SONG_MTIME))) {
+ song->mtime = atoi(&(line[strlen(SONG_MTIME)]));
} else {
g_set_error(error_r, song_save_quark(), 0,
- "unknown line in db: %s", buffer);
+ "unknown line in db: %s", line);
return false;
}
}
diff --git a/src/song_save.h b/src/song_save.h
index 36e03584e..cd62c986d 100644
--- a/src/song_save.h
+++ b/src/song_save.h
@@ -40,6 +40,6 @@ void songvec_save(FILE *fp, struct songvec *sv);
*/
bool
songvec_load(FILE *file, struct songvec *sv, struct directory *parent,
- GError **error_r);
+ GString *buffer, GError **error_r);
#endif
diff --git a/src/text_file.c b/src/text_file.c
new file mode 100644
index 000000000..16698fc57
--- /dev/null
+++ b/src/text_file.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "text_file.h"
+
+#include <assert.h>
+#include <string.h>
+
+char *
+read_text_line(FILE *file, GString *buffer)
+{
+ enum {
+ max_length = 512 * 1024,
+ step = 1024,
+ };
+
+ gsize length = 0, i;
+ char *p;
+
+ assert(file != NULL);
+ assert(buffer != NULL);
+
+ if (buffer->allocated_len < step)
+ g_string_set_size(buffer, step);
+
+ while (buffer->len < max_length) {
+ p = fgets(buffer->str + length,
+ buffer->allocated_len - length, file);
+ if (p == NULL) {
+ if (length == 0 || ferror(file))
+ return NULL;
+ break;
+ }
+
+ i = strlen(buffer->str + length);
+ length += i;
+ if (i < step - 1 || buffer->str[length - 1] == '\n')
+ break;
+
+ g_string_set_size(buffer, length + step);
+ }
+
+ g_string_set_size(buffer, length);
+ g_strchomp(buffer->str);
+ return buffer->str;
+}
diff --git a/src/text_file.h b/src/text_file.h
new file mode 100644
index 000000000..bc5c92870
--- /dev/null
+++ b/src/text_file.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TEXT_FILE_H
+#define MPD_TEXT_FILE_H
+
+#include <glib.h>
+
+#include <stdio.h>
+
+/**
+ * Reads a line from the input file, and strips trailing space. There
+ * is a reasonable maximum line length, only to prevent denial of
+ * service.
+ *
+ * @param file the source file, opened in text mode
+ * @param buffer an allocator for the buffer
+ * @return a pointer to the line, or NULL on end-of-file or error
+ */
+char *
+read_text_line(FILE *file, GString *buffer);
+
+#endif
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