Fixed crash (NULL pointer dereference)
[mirrors/libpurple-core-answerscripts.git] / answerscripts.c
index ca1a412..54b7576 100755 (executable)
@@ -40,7 +40,7 @@ typedef struct {
 
 int answerscripts_process_message_cb(answerscripts_job *job) {
        int i;
-       char response[ANSWERSCRIPTS_LINE_LENGTH+1];
+       char response[ANSWERSCRIPTS_LINE_LENGTH+1]; response[0]='\0';
        FILE *pipe = job->pipe;
        PurpleConversation *conv = job->conv;
 
@@ -50,7 +50,7 @@ int answerscripts_process_message_cb(answerscripts_job *job) {
                ) return 1;
 
                for(i=0;response[i];i++) if(response[i]=='\n') response[i]=0;
-               purple_conv_im_send(purple_conversation_get_im_data(conv), response);
+               if(response[0]!='\0') purple_conv_im_send(purple_conversation_get_im_data(conv), response);
 
                if(!feof(pipe)) return 1;
        }
@@ -61,15 +61,34 @@ int answerscripts_process_message_cb(answerscripts_job *job) {
 
 static void received_im_msg_cb(PurpleAccount *account, char *who, char *buffer, PurpleConversation *conv, PurpleMessageFlags flags, void *data) {
        if (conv == NULL) conv = purple_conversation_new(PURPLE_CONV_TYPE_IM, account, who); //* A workaround to avoid skipping of the first message as a result on NULL-conv: */
+       PurpleBuddy *buddy = purple_find_buddy(account, who);
 
        //Get message
        message = purple_markup_strip_html(buffer);
-       //printf("\nHarvie received: %s: %s\n", who, message); //debug
-       //purple_conv_im_send(purple_conversation_get_im_data(conv), ":-*"); //debug
+
+       /* Here are prototypes of some functions interesting to implement github feature request #3
+
+       LOCAL USER:
+       const char* purple_account_get_alias    (       const PurpleAccount *            account         )
+       const gchar* purple_account_get_name_for_display        (       const PurpleAccount *            account         )
+       REMOTE USER (Buddy):
+       const char *    purple_contact_get_alias (PurpleContact *contact)
+       const char *    purple_buddy_get_name (const PurpleBuddy *buddy)
+       const char *    purple_buddy_get_alias_only (PurpleBuddy *buddy)
+       const char *    purple_buddy_get_server_alias (PurpleBuddy *buddy)
+       const char *    purple_buddy_get_contact_alias (PurpleBuddy *buddy)
+       const char *    purple_buddy_get_local_alias (PurpleBuddy *buddy)
+       const char *    purple_buddy_get_alias (PurpleBuddy *buddy)
+       PurpleGroup *   purple_buddy_get_group (PurpleBuddy *buddy)
+       const char *    purple_group_get_name (PurpleGroup *group)
+       */
+
+       //Get buddy group
+       const char *from_group = purple_group_get_name(purple_buddy_get_group(buddy)); //FIXME: returns "\x18" when user does not belong to some group
 
        //Get protocol ID
        const char *protocol_id = purple_account_get_protocol_id(account);
-       if(!strncmp(protocol_id,PROTOCOL_PREFIX,strlen(PROTOCOL_PREFIX))) protocol_id += strlen(PROTOCOL_PREFIX); //trim out protocol prefix (eg.: "prpl-irc" => "irc")
+       if(!strncmp(protocol_id,PROTOCOL_PREFIX,strlen(PROTOCOL_PREFIX))) protocol_id += strlen(PROTOCOL_PREFIX); //trim out PROTOCOL_PREFIX (eg.: "prpl-irc" => "irc")
 
        //Get status
        PurpleStatus *status = purple_account_get_active_status(account);
@@ -90,6 +109,7 @@ static void received_im_msg_cb(PurpleAccount *account, char *who, char *buffer,
        //Export variables to environment
        setenv(ENV_PREFIX "MSG", message, 1);
        setenv(ENV_PREFIX "FROM", who, 1);
+       setenv(ENV_PREFIX "FROM_GROUP", from_group, 1);
        setenv(ENV_PREFIX "PROTOCOL", protocol_id, 1);
        setenv(ENV_PREFIX "STATUS", status_id, 1);
        setenv(ENV_PREFIX "STATUS_MSG", status_msg, 1);
@@ -97,6 +117,10 @@ static void received_im_msg_cb(PurpleAccount *account, char *who, char *buffer,
        //Launch job on background
        answerscripts_job *job = (answerscripts_job*) malloc(sizeof(answerscripts_job));
        job->pipe = popen(hook_script, "r");
+       if(job->pipe == NULL) {
+               fprintf(stderr,"Can't execute %s\n", hook_script);
+               return;
+       }
        job->conv = conv;
 
        #ifndef __WIN32__
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