A few small fixes

- Fix race condition in draw_peer()
- Handle realloc_peer_list() error
- Remove dead code in cmd_conference()
- Reduce scope of a few variable variables
- Fix possible buffer truncation in api.c

src/api.c

@@ -175,36 +175,36 @@ void cmd_run(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*argv)[MAX
 
 void invoke_autoruns(WINDOW *window, ToxWindow *self)
 {
-    struct dirent *dir;
-    char    abspath_buf[PATH_MAX + 1], err_buf[PATH_MAX + 1];
-    size_t  path_len;
-    DIR    *d;
-    FILE   *fp;
+    char abspath_buf[PATH_MAX + 256];
+    char err_buf[PATH_MAX + 128];
 
     if (user_settings->autorun_path[0] == '\0') {
         return;
     }
 
-    d = opendir(user_settings->autorun_path);
+    DIR *d = opendir(user_settings->autorun_path);
 
     if (d == NULL) {
-        snprintf(err_buf, PATH_MAX + 1, "Autorun path does not exist: %s", user_settings->autorun_path);
+        snprintf(err_buf, sizeof(err_buf), "Autorun path does not exist: %s", user_settings->autorun_path);
         api_display(err_buf);
         return;
     }
 
+    struct dirent *dir = NULL;
+
     cur_window  = window;
+
     self_window = self;
 
     while ((dir = readdir(d)) != NULL) {
-        path_len = strlen(dir->d_name);
+        size_t path_len = strlen(dir->d_name);
 
         if (!strcmp(dir->d_name + path_len - 3, ".py")) {
-            snprintf(abspath_buf, PATH_MAX + 1, "%s%s", user_settings->autorun_path, dir->d_name);
-            fp = fopen(abspath_buf, "r");
+            snprintf(abspath_buf, sizeof(abspath_buf), "%s%s", user_settings->autorun_path, dir->d_name);
+            FILE *fp = fopen(abspath_buf, "r");
 
             if (fp == NULL) {
-                snprintf(err_buf, PATH_MAX + 1, "Invalid path: %s", abspath_buf);
+                snprintf(err_buf, sizeof(err_buf), "Invalid path: %s", abspath_buf);
                 api_display(err_buf);
                 continue;
             }

src/audio_call.c

@@ -916,7 +916,7 @@ void stop_current_call(ToxWindow *self)
  */
 static void realloc_calls(uint32_t n)
 {
-    if (n <= 0) {
+    if (n == 0) {
         free(CallControl.calls);
         CallControl.calls = NULL;
         return;

src/chat.c

@@ -504,8 +504,6 @@ static void chat_onFileControl(ToxWindow *self, Tox *m, uint32_t friendnum, uint
         return;
     }
 
-    char msg[MAX_STR_SIZE];
-
     switch (control) {
         case TOX_FILE_CONTROL_RESUME: {
             /* transfer is accepted */
@@ -531,6 +529,7 @@ static void chat_onFileControl(ToxWindow *self, Tox *m, uint32_t friendnum, uint
         }
 
         case TOX_FILE_CONTROL_CANCEL: {
+            char msg[MAX_STR_SIZE];
             snprintf(msg, sizeof(msg), "File transfer for '%s' was aborted.", ft->file_name);
             close_file_transfer(self, m, ft, -1, msg, notif_error);
             break;

src/conference.c

@@ -160,7 +160,7 @@ static void init_conference_logging(ToxWindow *self, Tox *m, uint32_t conference
     char conference_id[TOX_CONFERENCE_ID_SIZE];
     tox_conference_get_id(m, conferencenum, (uint8_t *) conference_id);
 
-    if (log_init(ctx->log, conferences[conferencenum].title, my_id, conference_id, LOG_TYPE_CHAT) != 0) {
+    if (log_init(ctx->log, conferences[self->num].title, my_id, conference_id, LOG_TYPE_CHAT) != 0) {
         line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Warning: Log failed to initialize.");
         return;
     }
@@ -656,7 +656,11 @@ static void update_peer_list(Tox *m, uint32_t conferencenum, uint32_t num_peers,
         memcpy(old_peer_list, chat->peer_list, old_num_peers * sizeof(ConferencePeer));
     }
 
-    realloc_peer_list(chat, num_peers);
+    if (realloc_peer_list(chat, num_peers) != 0) {
+        free(old_peer_list);
+        fprintf(stderr, "Warning: realloc_peer_list() failed in update_peer_list()\n");
+        return;
+    }
 
     for (uint32_t i = 0; i < num_peers; ++i) {
         ConferencePeer *peer = &chat->peer_list[i];
@@ -971,15 +975,9 @@ static void draw_peer(ToxWindow *self, Tox *m, ChatContext *ctx, uint32_t i)
     const uint32_t peernum = conferences[self->num].name_list[peer_idx].peernum;
     const bool is_self = tox_conference_peer_number_is_ours(m, self->num, peernum, NULL);
     const bool audio = conferences[self->num].audio_enabled;
-    pthread_mutex_unlock(&Winthread.lock);
-
-    /* truncate nick to fit in side panel without modifying list */
-    char tmpnick[TOX_MAX_NAME_LENGTH];
-    int maxlen = SIDEBAR_WIDTH - 2 - 2 * audio;
 
     if (audio) {
 #ifdef AUDIO
-        pthread_mutex_lock(&Winthread.lock);
         const ConferencePeer *peer = peer_in_conference(self->num, peernum);
         const bool audio_active = is_self
                                   ? !timed_out(conferences[self->num].last_sent_audio, 2)
@@ -996,8 +994,14 @@ static void draw_peer(ToxWindow *self, Tox *m, ChatContext *ctx, uint32_t i)
         wattroff(ctx->sidebar, aud_attr);
         waddch(ctx->sidebar, ' ');
 #endif
+    } else {
+        pthread_mutex_unlock(&Winthread.lock);
     }
 
+    /* truncate nick to fit in side panel without modifying list */
+    char tmpnick[TOX_MAX_NAME_LENGTH];
+    int maxlen = SIDEBAR_WIDTH - 2 - 2 * audio;
+
     pthread_mutex_lock(&Winthread.lock);
     memcpy(tmpnick, &conferences[self->num].name_list[peer_idx].name, maxlen);
     pthread_mutex_unlock(&Winthread.lock);

src/friendlist.c

@@ -807,7 +807,7 @@ static void delete_blocked_friend(uint32_t bnum)
 /* deletes contact from friendlist and puts in blocklist */
 void block_friend(Tox *m, uint32_t fnum)
 {
-    if (Friends.num_friends <= 0) {
+    if (Friends.num_friends == 0) {
         return;
     }
 

src/global_commands.c

@@ -389,9 +389,6 @@ void cmd_conference(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*ar
         line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Audio support disabled by compile-time option.");
         return;
 #endif
-    } else {
-        line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Unknown conference type %d", type);
-        return;
     }
 
     if (init_conference_win(m, conferencenum, type, NULL, 0) == -1) {

src/log.c

@@ -368,10 +368,10 @@ int rename_logfile(const char *src, const char *dest, const char *selfkey, const
         if (rename(newpath, new_backup) != 0) {
             goto on_error;
         }
-    } else {
-        if (rename(oldpath, newpath) != 0) {
-            goto on_error;
-        }
+    }
+
+    if (rename(oldpath, newpath) != 0) {
+        goto on_error;
     }
 
     if (log != NULL) {

src/python_api.c

@@ -114,25 +114,23 @@ static PyObject *python_api_get_status_message(PyObject *self, PyObject *args)
 
 static PyObject *python_api_get_all_friends(PyObject *self, PyObject *args)
 {
-    size_t       i, ii;
     FriendsList  friends;
-    PyObject    *cur, *ret;
-    char         pubkey_buf[TOX_PUBLIC_KEY_SIZE * 2 + 1];
+    char pubkey_buf[TOX_PUBLIC_KEY_SIZE * 2 + 1];
 
     if (!PyArg_ParseTuple(args, "")) {
         return NULL;
     }
 
     friends = api_get_friendslist();
-    ret     = PyList_New(0);
+    PyObject *ret = PyList_New(0);
 
-    for (i = 0; i < friends.num_friends; i++) {
-        for (ii = 0; ii < TOX_PUBLIC_KEY_SIZE; ii++) {
+    for (size_t i = 0; i < friends.num_friends; i++) {
+        for (size_t ii = 0; ii < TOX_PUBLIC_KEY_SIZE; ii++) {
             snprintf(pubkey_buf + ii * 2, 3, "%02X", friends.list[i].pub_key[ii] & 0xff);
         }
 
         pubkey_buf[TOX_PUBLIC_KEY_SIZE * 2] = '\0';
-        cur = Py_BuildValue("(s,s)", friends.list[i].name, pubkey_buf);
+        PyObject *cur = Py_BuildValue("(s,s)", friends.list[i].name, pubkey_buf);
         PyList_Append(ret, cur);
     }
 
@@ -264,14 +262,14 @@ PyMODINIT_FUNC PyInit_toxic_api(void)
 
 void terminate_python(void)
 {
-    struct python_registered_func *cur, *old;
-
     if (python_commands.name != NULL) {
         free(python_commands.name);
     }
 
+    struct python_registered_func *cur = NULL;
+
     for (cur = python_commands.next; cur != NULL;) {
-        old = cur;
+        struct python_registered_func *old = cur;
         cur = cur->next;
         free(old->name);
         free(old);

src/xtra.c

@@ -235,11 +235,12 @@ void *event_loop(void *p)
     UNUSED_VAR(p); /* DINDUNOTHIN */
 
     XEvent event;
-    int pending;
 
     while (Xtra.display) {
         /* NEEDMOEVENTSFODEMPROGRAMS */
 
+        int pending = 0;
+
         XLockDisplay(Xtra.display);
 
         if ((pending = XPending(Xtra.display))) {