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authorMax Kellermann <max@duempel.org>2011-09-11 07:41:25 +0200
committerMax Kellermann <max@duempel.org>2011-09-11 07:57:50 +0200
commitca419c84b83d017c3e4309e22f92273500197eea (patch)
tree495a1a68c3bc4b0d1fbd2efb30985d31e14fe18d /src/stored_playlist.c
parentaede71b1dcda4dacc566f11d47188c85a3ee8dd2 (diff)
downloadmpd-ca419c84b83d017c3e4309e22f92273500197eea.tar.gz
mpd-ca419c84b83d017c3e4309e22f92273500197eea.tar.xz
mpd-ca419c84b83d017c3e4309e22f92273500197eea.zip
stored_playlist: return GError, code is playlist_result
Improve error reporting and handling. command.c gets the new function print_error(), which sends a GError to the client.
Diffstat (limited to '')
-rw-r--r--src/stored_playlist.c304
1 files changed, 190 insertions, 114 deletions
diff --git a/src/stored_playlist.c b/src/stored_playlist.c
index c3785a6f3..39ba2bac1 100644
--- a/src/stored_playlist.c
+++ b/src/stored_playlist.c
@@ -28,6 +28,7 @@
#include "database.h"
#include "idle.h"
#include "conf.h"
+#include "glib_compat.h"
#include <assert.h>
#include <sys/types.h>
@@ -72,6 +73,67 @@ spl_valid_name(const char *name_utf8)
strchr(name_utf8, '\r') == NULL;
}
+static const char *
+spl_map(GError **error_r)
+{
+ const char *path_fs = map_spl_path();
+ if (path_fs == NULL)
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_DISABLED,
+ "Stored playlists are disabled");
+
+ return path_fs;
+}
+
+static bool
+spl_check_name(const char *name_utf8, GError **error_r)
+{
+ if (!spl_valid_name(name_utf8)) {
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_BAD_NAME,
+ "Bad playlist name");
+ return false;
+ }
+
+ return true;
+}
+
+static char *
+spl_map_to_fs(const char *name_utf8, GError **error_r)
+{
+ if (spl_map(error_r) == NULL ||
+ !spl_check_name(name_utf8, error_r))
+ return NULL;
+
+ char *path_fs = map_spl_utf8_to_fs(name_utf8);
+ if (path_fs == NULL)
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_BAD_NAME,
+ "Bad playlist name");
+
+ return path_fs;
+}
+
+/**
+ * Create a GError for the current errno.
+ */
+static void
+playlist_errno(GError **error_r)
+{
+ switch (errno) {
+ case ENOENT:
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_NO_SUCH_LIST,
+ "No such playlist");
+ break;
+
+ default:
+ g_set_error_literal(error_r, g_file_error_quark(), errno,
+ g_strerror(errno));
+ break;
+ }
+}
+
static struct stored_playlist_info *
load_playlist_info(const char *parent_path_fs, const char *name_fs)
{
@@ -108,9 +170,9 @@ load_playlist_info(const char *parent_path_fs, const char *name_fs)
}
GPtrArray *
-spl_list(void)
+spl_list(GError **error_r)
{
- const char *parent_path_fs = map_spl_path();
+ const char *parent_path_fs = spl_map(error_r);
DIR *dir;
struct dirent *ent;
GPtrArray *list;
@@ -120,8 +182,11 @@ spl_list(void)
return NULL;
dir = opendir(parent_path_fs);
- if (dir == NULL)
+ if (dir == NULL) {
+ g_set_error_literal(error_r, g_file_error_quark(), errno,
+ g_strerror(errno));
return NULL;
+ }
list = g_ptr_array_new();
@@ -148,25 +213,26 @@ spl_list_free(GPtrArray *list)
g_ptr_array_free(list, true);
}
-static enum playlist_result
-spl_save(GPtrArray *list, const char *utf8path)
+static bool
+spl_save(GPtrArray *list, const char *utf8path, GError **error_r)
{
FILE *file;
- char *path_fs;
assert(utf8path != NULL);
- if (map_spl_path() == NULL)
- return PLAYLIST_RESULT_DISABLED;
+ if (spl_map(error_r) == NULL)
+ return false;
- path_fs = map_spl_utf8_to_fs(utf8path);
+ char *path_fs = spl_map_to_fs(utf8path, error_r);
if (path_fs == NULL)
- return PLAYLIST_RESULT_BAD_NAME;
+ return false;
file = fopen(path_fs, "w");
g_free(path_fs);
- if (file == NULL)
- return PLAYLIST_RESULT_ERRNO;
+ if (file == NULL) {
+ playlist_errno(error_r);
+ return false;
+ }
for (unsigned i = 0; i < list->len; ++i) {
const char *uri = g_ptr_array_index(list, i);
@@ -174,27 +240,29 @@ spl_save(GPtrArray *list, const char *utf8path)
}
fclose(file);
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
}
GPtrArray *
-spl_load(const char *utf8path)
+spl_load(const char *utf8path, GError **error_r)
{
FILE *file;
GPtrArray *list;
char *path_fs;
- if (!spl_valid_name(utf8path) || map_spl_path() == NULL)
+ if (spl_map(error_r) == NULL)
return NULL;
- path_fs = map_spl_utf8_to_fs(utf8path);
+ path_fs = spl_map_to_fs(utf8path, error_r);
if (path_fs == NULL)
return NULL;
file = fopen(path_fs, "r");
g_free(path_fs);
- if (file == NULL)
+ if (file == NULL) {
+ playlist_errno(error_r);
return NULL;
+ }
list = g_ptr_array_new();
@@ -260,30 +328,33 @@ spl_insert_index_internal(GPtrArray *list, unsigned idx, char *uri)
g_ptr_array_index(list, idx) = uri;
}
-enum playlist_result
-spl_move_index(const char *utf8path, unsigned src, unsigned dest)
+bool
+spl_move_index(const char *utf8path, unsigned src, unsigned dest,
+ GError **error_r)
{
- GPtrArray *list;
char *uri;
- enum playlist_result result;
if (src == dest)
/* this doesn't check whether the playlist exists, but
what the hell.. */
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
- if (!(list = spl_load(utf8path)))
- return PLAYLIST_RESULT_NO_SUCH_LIST;
+ GPtrArray *list = spl_load(utf8path, error_r);
+ if (list == NULL)
+ return false;
if (src >= list->len || dest >= list->len) {
spl_free(list);
- return PLAYLIST_RESULT_BAD_RANGE;
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_BAD_RANGE,
+ "Bad range");
+ return false;
}
uri = spl_remove_index_internal(list, src);
spl_insert_index_internal(list, dest, uri);
- result = spl_save(list, utf8path);
+ bool result = spl_save(list, utf8path, error_r);
spl_free(list);
@@ -291,78 +362,72 @@ spl_move_index(const char *utf8path, unsigned src, unsigned dest)
return result;
}
-enum playlist_result
-spl_clear(const char *utf8path)
+bool
+spl_clear(const char *utf8path, GError **error_r)
{
- char *path_fs;
FILE *file;
- if (map_spl_path() == NULL)
- return PLAYLIST_RESULT_DISABLED;
-
- if (!spl_valid_name(utf8path))
- return PLAYLIST_RESULT_BAD_NAME;
+ if (spl_map(error_r) == NULL)
+ return false;
- path_fs = map_spl_utf8_to_fs(utf8path);
+ char *path_fs = spl_map_to_fs(utf8path, error_r);
if (path_fs == NULL)
- return PLAYLIST_RESULT_BAD_NAME;
+ return false;
file = fopen(path_fs, "w");
g_free(path_fs);
- if (file == NULL)
- return PLAYLIST_RESULT_ERRNO;
+ if (file == NULL) {
+ playlist_errno(error_r);
+ return false;
+ }
fclose(file);
idle_add(IDLE_STORED_PLAYLIST);
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
}
-enum playlist_result
-spl_delete(const char *name_utf8)
+bool
+spl_delete(const char *name_utf8, GError **error_r)
{
char *path_fs;
int ret;
- if (map_spl_path() == NULL)
- return PLAYLIST_RESULT_DISABLED;
-
- if (!spl_valid_name(name_utf8))
- return PLAYLIST_RESULT_BAD_NAME;
-
- path_fs = map_spl_utf8_to_fs(name_utf8);
+ path_fs = spl_map_to_fs(name_utf8, error_r);
if (path_fs == NULL)
- return PLAYLIST_RESULT_BAD_NAME;
+ return false;
ret = unlink(path_fs);
g_free(path_fs);
- if (ret < 0)
- return errno == ENOENT
- ? PLAYLIST_RESULT_NO_SUCH_LIST
- : PLAYLIST_RESULT_ERRNO;
+ if (ret < 0) {
+ playlist_errno(error_r);
+ return false;
+ }
idle_add(IDLE_STORED_PLAYLIST);
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
}
-enum playlist_result
-spl_remove_index(const char *utf8path, unsigned pos)
+bool
+spl_remove_index(const char *utf8path, unsigned pos, GError **error_r)
{
- GPtrArray *list;
char *uri;
- enum playlist_result result;
- if (!(list = spl_load(utf8path)))
- return PLAYLIST_RESULT_NO_SUCH_LIST;
+ GPtrArray *list = spl_load(utf8path, error_r);
+ if (list == NULL)
+ return false;
if (pos >= list->len) {
spl_free(list);
- return PLAYLIST_RESULT_BAD_RANGE;
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_BAD_RANGE,
+ "Bad range");
+ return false;
}
uri = spl_remove_index_internal(list, pos);
g_free(uri);
- result = spl_save(list, utf8path);
+ bool result = spl_save(list, utf8path, error_r);
spl_free(list);
@@ -370,38 +435,38 @@ spl_remove_index(const char *utf8path, unsigned pos)
return result;
}
-enum playlist_result
-spl_append_song(const char *utf8path, struct song *song)
+bool
+spl_append_song(const char *utf8path, struct song *song, GError **error_r)
{
FILE *file;
struct stat st;
- char *path_fs;
- if (map_spl_path() == NULL)
- return PLAYLIST_RESULT_DISABLED;
+ if (spl_map(error_r) == NULL)
+ return false;
- if (!spl_valid_name(utf8path))
- return PLAYLIST_RESULT_BAD_NAME;
-
- path_fs = map_spl_utf8_to_fs(utf8path);
+ char *path_fs = spl_map_to_fs(utf8path, error_r);
if (path_fs == NULL)
- return PLAYLIST_RESULT_BAD_NAME;
+ return false;
file = fopen(path_fs, "a");
g_free(path_fs);
- if (file == NULL)
- return PLAYLIST_RESULT_ERRNO;
+ if (file == NULL) {
+ playlist_errno(error_r);
+ return false;
+ }
if (fstat(fileno(file), &st) < 0) {
- int save_errno = errno;
+ playlist_errno(error_r);
fclose(file);
- errno = save_errno;
- return PLAYLIST_RESULT_ERRNO;
+ return false;
}
if (st.st_size / (MPD_PATH_MAX + 1) >= (off_t)playlist_max_length) {
fclose(file);
- return PLAYLIST_RESULT_TOO_LARGE;
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_TOO_LARGE,
+ "Stored playlist is too large");
+ return false;
}
playlist_print_song(file, song);
@@ -409,68 +474,79 @@ spl_append_song(const char *utf8path, struct song *song)
fclose(file);
idle_add(IDLE_STORED_PLAYLIST);
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
}
-enum playlist_result
-spl_append_uri(const char *url, const char *utf8file)
+bool
+spl_append_uri(const char *url, const char *utf8file, GError **error_r)
{
struct song *song;
if (uri_has_scheme(url)) {
- enum playlist_result ret;
-
song = song_remote_new(url);
- ret = spl_append_song(utf8file, song);
+ bool success = spl_append_song(utf8file, song, error_r);
song_free(song);
- return ret;
+ return success;
} else {
song = db_get_song(url);
- if (song == NULL)
- return PLAYLIST_RESULT_NO_SUCH_SONG;
-
- return spl_append_song(utf8file, song);
+ if (song == NULL) {
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_NO_SUCH_SONG,
+ "No such song");
+ return false;
+ }
+
+ return spl_append_song(utf8file, song, error_r);
}
}
-static enum playlist_result
-spl_rename_internal(const char *from_path_fs, const char *to_path_fs)
+static bool
+spl_rename_internal(const char *from_path_fs, const char *to_path_fs,
+ GError **error_r)
{
- if (!g_file_test(from_path_fs, G_FILE_TEST_IS_REGULAR))
- return PLAYLIST_RESULT_NO_SUCH_LIST;
+ if (!g_file_test(from_path_fs, G_FILE_TEST_IS_REGULAR)) {
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_NO_SUCH_LIST,
+ "No such playlist");
+ return false;
+ }
- if (g_file_test(to_path_fs, G_FILE_TEST_EXISTS))
- return PLAYLIST_RESULT_LIST_EXISTS;
+ if (g_file_test(to_path_fs, G_FILE_TEST_EXISTS)) {
+ g_set_error_literal(error_r, playlist_quark(),
+ PLAYLIST_RESULT_LIST_EXISTS,
+ "Playlist exists already");
+ return false;
+ }
- if (rename(from_path_fs, to_path_fs) < 0)
- return PLAYLIST_RESULT_ERRNO;
+ if (rename(from_path_fs, to_path_fs) < 0) {
+ playlist_errno(error_r);
+ return false;
+ }
idle_add(IDLE_STORED_PLAYLIST);
- return PLAYLIST_RESULT_SUCCESS;
+ return true;
}
-enum playlist_result
-spl_rename(const char *utf8from, const char *utf8to)
+bool
+spl_rename(const char *utf8from, const char *utf8to, GError **error_r)
{
- char *from_path_fs, *to_path_fs;
- static enum playlist_result ret;
-
- if (map_spl_path() == NULL)
- return PLAYLIST_RESULT_DISABLED;
+ if (spl_map(error_r) == NULL)
+ return false;
- if (!spl_valid_name(utf8from) || !spl_valid_name(utf8to))
- return PLAYLIST_RESULT_BAD_NAME;
+ char *from_path_fs = spl_map_to_fs(utf8from, error_r);
+ if (from_path_fs == NULL)
+ return false;
- from_path_fs = map_spl_utf8_to_fs(utf8from);
- to_path_fs = map_spl_utf8_to_fs(utf8to);
+ char *to_path_fs = spl_map_to_fs(utf8to, error_r);
+ if (to_path_fs == NULL) {
+ g_free(from_path_fs);
+ return false;
+ }
- if (from_path_fs != NULL && to_path_fs != NULL)
- ret = spl_rename_internal(from_path_fs, to_path_fs);
- else
- ret = PLAYLIST_RESULT_BAD_NAME;
+ bool success = spl_rename_internal(from_path_fs, to_path_fs, error_r);
g_free(from_path_fs);
g_free(to_path_fs);
- return ret;
+ return success;
}