2010-08-07 18:05:16 +02:00
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/*
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2011-10-09 15:28:20 +02:00
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* vim:ts=4:sw=4:expandtab
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*
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2010-08-07 18:05:16 +02:00
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* i3bar - an xcb-based status- and ws-bar for i3
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2012-08-23 12:55:28 +02:00
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* © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
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2010-08-07 18:05:16 +02:00
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*
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2011-10-25 22:19:38 +02:00
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* child.c: Getting Input for the statusline
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2010-08-07 18:05:16 +02:00
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*
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*/
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2010-08-05 05:09:59 +02:00
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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2011-03-14 09:17:06 +01:00
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#include <sys/wait.h>
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2010-08-05 05:09:59 +02:00
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#include <signal.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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2011-10-23 15:31:43 +02:00
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#include <err.h>
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2010-08-05 05:09:59 +02:00
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#include <ev.h>
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2012-02-17 00:27:11 +01:00
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#include <yajl/yajl_common.h>
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#include <yajl/yajl_parse.h>
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2012-02-17 00:41:58 +01:00
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#include <yajl/yajl_version.h>
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2013-03-21 11:48:27 +01:00
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#include <yajl/yajl_gen.h>
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2010-08-05 05:09:59 +02:00
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#include "common.h"
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2010-09-17 03:03:43 +02:00
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/* Global variables for child_*() */
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2012-09-03 10:23:25 +02:00
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i3bar_child child = { 0 };
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2010-09-17 03:03:43 +02:00
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2010-08-07 02:10:05 +02:00
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/* stdin- and sigchild-watchers */
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ev_io *stdin_io;
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2010-08-05 05:09:59 +02:00
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ev_child *child_sig;
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2012-02-17 00:27:11 +01:00
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/* JSON parser for stdin */
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yajl_callbacks callbacks;
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yajl_handle parser;
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2013-03-21 11:48:27 +01:00
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/* JSON generator for stdout */
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yajl_gen gen;
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2012-02-17 00:27:11 +01:00
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typedef struct parser_ctx {
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2012-08-21 13:52:15 +02:00
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/* True if one of the parsed blocks was urgent */
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bool has_urgent;
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2012-02-17 00:27:11 +01:00
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/* A copy of the last JSON map key. */
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char *last_map_key;
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/* The current block. Will be filled, then copied and put into the list of
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* blocks. */
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struct status_block block;
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} parser_ctx;
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parser_ctx parser_context;
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2011-01-03 01:39:49 +01:00
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/* The buffer statusline points to */
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2012-02-17 00:27:11 +01:00
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struct statusline_head statusline_head = TAILQ_HEAD_INITIALIZER(statusline_head);
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2011-01-03 01:39:49 +01:00
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char *statusline_buffer = NULL;
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2013-03-24 09:30:05 +01:00
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int child_stdin;
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2010-08-07 02:10:05 +02:00
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/*
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* Stop and free() the stdin- and sigchild-watchers
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*
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*/
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2012-08-23 12:55:28 +02:00
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void cleanup(void) {
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2011-03-14 09:17:06 +01:00
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if (stdin_io != NULL) {
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ev_io_stop(main_loop, stdin_io);
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FREE(stdin_io);
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2011-07-08 23:16:33 +02:00
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FREE(statusline_buffer);
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2011-11-07 22:34:50 +01:00
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/* statusline pointed to memory within statusline_buffer */
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statusline = NULL;
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2011-07-08 23:16:33 +02:00
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}
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if (child_sig != NULL) {
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ev_child_stop(main_loop, child_sig);
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2011-03-14 09:17:06 +01:00
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FREE(child_sig);
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}
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2012-09-03 10:23:25 +02:00
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memset(&child, 0, sizeof(i3bar_child));
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2010-08-05 05:09:59 +02:00
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}
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2012-02-17 00:27:11 +01:00
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/*
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* The start of a new array is the start of a new status line, so we clear all
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* previous entries.
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*
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*/
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static int stdin_start_array(void *context) {
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struct status_block *first;
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while (!TAILQ_EMPTY(&statusline_head)) {
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first = TAILQ_FIRST(&statusline_head);
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2012-09-03 00:41:51 +02:00
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I3STRING_FREE(first->full_text);
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2012-02-17 00:27:11 +01:00
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FREE(first->color);
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2013-03-21 11:48:27 +01:00
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FREE(first->name);
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FREE(first->instance);
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2012-02-17 00:27:11 +01:00
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TAILQ_REMOVE(&statusline_head, first, blocks);
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free(first);
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}
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return 1;
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}
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/*
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* The start of a map is the start of a single block of the status line.
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*
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*/
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static int stdin_start_map(void *context) {
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parser_ctx *ctx = context;
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memset(&(ctx->block), '\0', sizeof(struct status_block));
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2013-01-27 21:27:21 +01:00
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/* Default width of the separator block. */
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ctx->block.sep_block_width = 9;
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2012-02-17 00:27:11 +01:00
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return 1;
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}
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2012-02-17 00:41:58 +01:00
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#if YAJL_MAJOR >= 2
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2012-02-17 00:27:11 +01:00
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static int stdin_map_key(void *context, const unsigned char *key, size_t len) {
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2012-02-17 00:41:58 +01:00
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#else
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static int stdin_map_key(void *context, const unsigned char *key, unsigned int len) {
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#endif
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2012-02-17 00:27:11 +01:00
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parser_ctx *ctx = context;
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FREE(ctx->last_map_key);
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sasprintf(&(ctx->last_map_key), "%.*s", len, key);
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return 1;
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}
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2012-08-21 13:52:15 +02:00
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static int stdin_boolean(void *context, int val) {
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parser_ctx *ctx = context;
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if (strcasecmp(ctx->last_map_key, "urgent") == 0) {
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ctx->block.urgent = val;
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}
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2013-01-27 21:27:21 +01:00
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if (strcasecmp(ctx->last_map_key, "separator") == 0) {
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ctx->block.no_separator = !val;
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}
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2012-08-21 13:52:15 +02:00
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return 1;
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}
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2012-02-17 00:41:58 +01:00
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#if YAJL_MAJOR >= 2
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2012-02-17 00:27:11 +01:00
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static int stdin_string(void *context, const unsigned char *val, size_t len) {
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2012-02-17 00:41:58 +01:00
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#else
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static int stdin_string(void *context, const unsigned char *val, unsigned int len) {
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#endif
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2012-02-17 00:27:11 +01:00
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parser_ctx *ctx = context;
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if (strcasecmp(ctx->last_map_key, "full_text") == 0) {
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2012-08-07 19:46:23 +02:00
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ctx->block.full_text = i3string_from_utf8_with_length((const char *)val, len);
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2012-02-17 00:27:11 +01:00
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}
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if (strcasecmp(ctx->last_map_key, "color") == 0) {
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sasprintf(&(ctx->block.color), "%.*s", len, val);
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}
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2012-12-02 13:20:06 +01:00
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if (strcasecmp(ctx->last_map_key, "align") == 0) {
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if (len == strlen("left") && !strncmp((const char*)val, "left", strlen("left"))) {
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ctx->block.align = ALIGN_LEFT;
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} else if (len == strlen("right") && !strncmp((const char*)val, "right", strlen("right"))) {
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ctx->block.align = ALIGN_RIGHT;
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} else {
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ctx->block.align = ALIGN_CENTER;
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}
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2013-02-25 11:41:02 +01:00
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} else if (strcasecmp(ctx->last_map_key, "min_width") == 0) {
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i3String *text = i3string_from_utf8_with_length((const char *)val, len);
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ctx->block.min_width = (uint32_t)predict_text_width(text);
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i3string_free(text);
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2012-12-02 13:20:06 +01:00
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}
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2013-03-21 11:48:27 +01:00
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if (strcasecmp(ctx->last_map_key, "name") == 0) {
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char *copy = (char*)malloc(len+1);
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strncpy(copy, (const char *)val, len);
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copy[len] = 0;
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ctx->block.name = copy;
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}
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if (strcasecmp(ctx->last_map_key, "instance") == 0) {
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char *copy = (char*)malloc(len+1);
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strncpy(copy, (const char *)val, len);
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copy[len] = 0;
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ctx->block.instance = copy;
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}
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2012-12-02 13:20:06 +01:00
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return 1;
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}
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#if YAJL_MAJOR >= 2
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static int stdin_integer(void *context, long long val) {
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#else
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static int stdin_integer(void *context, long val) {
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#endif
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parser_ctx *ctx = context;
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if (strcasecmp(ctx->last_map_key, "min_width") == 0) {
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ctx->block.min_width = (uint32_t)val;
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}
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2013-01-27 21:27:21 +01:00
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if (strcasecmp(ctx->last_map_key, "separator_block_width") == 0) {
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ctx->block.sep_block_width = (uint32_t)val;
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}
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2012-02-17 00:27:11 +01:00
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return 1;
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}
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static int stdin_end_map(void *context) {
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parser_ctx *ctx = context;
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struct status_block *new_block = smalloc(sizeof(struct status_block));
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memcpy(new_block, &(ctx->block), sizeof(struct status_block));
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2012-05-12 08:23:37 +02:00
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/* Ensure we have a full_text set, so that when it is missing (or null),
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* i3bar doesn’t crash and the user gets an annoying message. */
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if (!new_block->full_text)
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2012-08-07 19:46:23 +02:00
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new_block->full_text = i3string_from_utf8("SPEC VIOLATION (null)");
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2012-08-21 13:52:15 +02:00
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if (new_block->urgent)
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ctx->has_urgent = true;
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2012-02-17 00:27:11 +01:00
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TAILQ_INSERT_TAIL(&statusline_head, new_block, blocks);
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return 1;
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}
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static int stdin_end_array(void *context) {
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DLOG("dumping statusline:\n");
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struct status_block *current;
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TAILQ_FOREACH(current, &statusline_head, blocks) {
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2012-08-07 19:46:23 +02:00
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DLOG("full_text = %s\n", i3string_as_utf8(current->full_text));
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2012-02-17 00:27:11 +01:00
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DLOG("color = %s\n", current->color);
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}
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DLOG("end of dump\n");
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return 1;
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}
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2010-08-07 02:10:05 +02:00
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/*
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2012-09-03 09:45:59 +02:00
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* Helper function to read stdin
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2010-08-07 02:10:05 +02:00
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*
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*/
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2012-09-03 09:45:59 +02:00
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static unsigned char *get_buffer(ev_io *watcher, int *ret_buffer_len) {
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2010-08-05 05:09:59 +02:00
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int fd = watcher->fd;
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int n = 0;
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int rec = 0;
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int buffer_len = STDIN_CHUNK_SIZE;
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2012-04-07 19:15:41 +02:00
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unsigned char *buffer = smalloc(buffer_len+1);
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2011-01-03 01:39:49 +01:00
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buffer[0] = '\0';
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2010-08-05 05:09:59 +02:00
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while(1) {
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n = read(fd, buffer + rec, buffer_len - rec);
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if (n == -1) {
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if (errno == EAGAIN) {
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2012-02-17 00:27:11 +01:00
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/* finish up */
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2010-08-05 05:09:59 +02:00
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break;
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}
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2011-01-01 16:48:30 +01:00
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ELOG("read() failed!: %s\n", strerror(errno));
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2010-08-05 05:09:59 +02:00
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exit(EXIT_FAILURE);
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}
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if (n == 0) {
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2011-07-08 23:16:33 +02:00
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/* end of file, kill the watcher */
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2011-08-25 17:10:45 +02:00
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ELOG("stdin: received EOF\n");
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2011-07-10 04:34:18 +02:00
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cleanup();
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2012-08-21 13:51:40 +02:00
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draw_bars(false);
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2012-09-03 09:45:59 +02:00
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*ret_buffer_len = -1;
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return NULL;
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2010-08-05 05:09:59 +02:00
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}
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rec += n;
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2011-07-08 23:16:33 +02:00
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if (rec == buffer_len) {
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buffer_len += STDIN_CHUNK_SIZE;
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2011-10-21 20:30:46 +02:00
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buffer = srealloc(buffer, buffer_len);
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2011-08-12 18:43:09 +02:00
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}
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2010-08-05 05:09:59 +02:00
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}
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2011-01-01 15:07:28 +01:00
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if (*buffer == '\0') {
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2010-08-05 05:09:59 +02:00
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FREE(buffer);
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2012-09-03 09:45:59 +02:00
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rec = -1;
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2010-08-05 05:09:59 +02:00
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}
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2012-09-03 09:45:59 +02:00
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*ret_buffer_len = rec;
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return buffer;
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}
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2012-02-17 00:27:11 +01:00
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2012-09-03 09:52:17 +02:00
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|
|
static void read_flat_input(char *buffer, int length) {
|
|
|
|
|
struct status_block *first = TAILQ_FIRST(&statusline_head);
|
|
|
|
|
/* Clear the old buffer if any. */
|
|
|
|
|
I3STRING_FREE(first->full_text);
|
|
|
|
|
/* Remove the trailing newline and terminate the string at the same
|
|
|
|
|
* time. */
|
|
|
|
|
if (buffer[length-1] == '\n' || buffer[length-1] == '\r')
|
|
|
|
|
buffer[length-1] = '\0';
|
|
|
|
|
else buffer[length] = '\0';
|
|
|
|
|
first->full_text = i3string_from_utf8(buffer);
|
|
|
|
|
}
|
|
|
|
|
|
2012-08-21 13:52:15 +02:00
|
|
|
|
static bool read_json_input(unsigned char *input, int length) {
|
2012-09-03 09:52:17 +02:00
|
|
|
|
yajl_status status = yajl_parse(parser, input, length);
|
2012-08-21 13:52:15 +02:00
|
|
|
|
bool has_urgent = false;
|
2012-09-03 09:52:17 +02:00
|
|
|
|
#if YAJL_MAJOR >= 2
|
|
|
|
|
if (status != yajl_status_ok) {
|
|
|
|
|
#else
|
|
|
|
|
if (status != yajl_status_ok && status != yajl_status_insufficient_data) {
|
|
|
|
|
#endif
|
|
|
|
|
fprintf(stderr, "[i3bar] Could not parse JSON input (code %d): %.*s\n",
|
|
|
|
|
status, length, input);
|
2012-08-21 13:52:15 +02:00
|
|
|
|
} else if (parser_context.has_urgent) {
|
|
|
|
|
has_urgent = true;
|
2012-09-03 09:52:17 +02:00
|
|
|
|
}
|
2012-08-21 13:52:15 +02:00
|
|
|
|
return has_urgent;
|
2012-09-03 09:52:17 +02:00
|
|
|
|
}
|
|
|
|
|
|
2012-09-03 09:45:59 +02:00
|
|
|
|
/*
|
|
|
|
|
* Callbalk for stdin. We read a line from stdin and store the result
|
|
|
|
|
* in statusline
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void stdin_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
|
|
|
|
|
int rec;
|
|
|
|
|
unsigned char *buffer = get_buffer(watcher, &rec);
|
|
|
|
|
if (buffer == NULL)
|
|
|
|
|
return;
|
2012-08-21 13:52:15 +02:00
|
|
|
|
bool has_urgent = false;
|
2012-09-03 10:23:25 +02:00
|
|
|
|
if (child.version > 0) {
|
2012-08-21 13:52:15 +02:00
|
|
|
|
has_urgent = read_json_input(buffer, rec);
|
2012-02-17 00:27:11 +01:00
|
|
|
|
} else {
|
2012-09-03 09:52:17 +02:00
|
|
|
|
read_flat_input((char*)buffer, rec);
|
2011-01-03 01:39:49 +01:00
|
|
|
|
}
|
2012-09-03 00:41:15 +02:00
|
|
|
|
free(buffer);
|
2012-08-21 13:52:15 +02:00
|
|
|
|
draw_bars(has_urgent);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
}
|
|
|
|
|
|
2012-09-03 10:11:01 +02:00
|
|
|
|
/*
|
|
|
|
|
* Callbalk for stdin first line. We read the first line to detect
|
|
|
|
|
* whether this is JSON or plain text
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void stdin_io_first_line_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
|
|
|
|
|
int rec;
|
|
|
|
|
unsigned char *buffer = get_buffer(watcher, &rec);
|
|
|
|
|
if (buffer == NULL)
|
|
|
|
|
return;
|
|
|
|
|
DLOG("Detecting input type based on buffer *%.*s*\n", rec, buffer);
|
|
|
|
|
/* Detect whether this is JSON or plain text. */
|
|
|
|
|
unsigned int consumed = 0;
|
|
|
|
|
/* At the moment, we don’t care for the version. This might change
|
|
|
|
|
* in the future, but for now, we just discard it. */
|
2012-09-03 10:43:29 +02:00
|
|
|
|
parse_json_header(&child, buffer, rec, &consumed);
|
2012-09-03 10:23:25 +02:00
|
|
|
|
if (child.version > 0) {
|
2012-08-20 22:20:37 +02:00
|
|
|
|
/* If hide-on-modifier is set, we start of by sending the
|
|
|
|
|
* child a SIGSTOP, because the bars aren't mapped at start */
|
|
|
|
|
if (config.hide_on_modifier) {
|
|
|
|
|
stop_child();
|
|
|
|
|
}
|
2012-09-03 10:23:25 +02:00
|
|
|
|
read_json_input(buffer + consumed, rec - consumed);
|
|
|
|
|
} else {
|
2012-09-03 10:11:01 +02:00
|
|
|
|
/* In case of plaintext, we just add a single block and change its
|
|
|
|
|
* full_text pointer later. */
|
|
|
|
|
struct status_block *new_block = scalloc(sizeof(struct status_block));
|
|
|
|
|
TAILQ_INSERT_TAIL(&statusline_head, new_block, blocks);
|
|
|
|
|
read_flat_input((char*)buffer, rec);
|
|
|
|
|
}
|
|
|
|
|
free(buffer);
|
|
|
|
|
ev_io_stop(main_loop, stdin_io);
|
|
|
|
|
ev_io_init(stdin_io, &stdin_io_cb, STDIN_FILENO, EV_READ);
|
|
|
|
|
ev_io_start(main_loop, stdin_io);
|
|
|
|
|
}
|
|
|
|
|
|
2010-08-07 02:10:05 +02:00
|
|
|
|
/*
|
|
|
|
|
* We received a sigchild, meaning, that the child-process terminated.
|
|
|
|
|
* We simply free the respective data-structures and don't care for input
|
|
|
|
|
* anymore
|
|
|
|
|
*
|
|
|
|
|
*/
|
2010-08-05 05:09:59 +02:00
|
|
|
|
void child_sig_cb(struct ev_loop *loop, ev_child *watcher, int revents) {
|
2011-08-25 17:10:45 +02:00
|
|
|
|
ELOG("Child (pid: %d) unexpectedly exited with status %d\n",
|
2012-09-03 10:23:25 +02:00
|
|
|
|
child.pid,
|
2010-08-07 02:10:05 +02:00
|
|
|
|
watcher->rstatus);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
cleanup();
|
|
|
|
|
}
|
|
|
|
|
|
2013-03-21 11:48:27 +01:00
|
|
|
|
void child_write_output(void) {
|
|
|
|
|
if (child.click_events) {
|
|
|
|
|
const unsigned char *output;
|
2013-04-06 14:50:46 +02:00
|
|
|
|
#if YAJL_MAJOR < 2
|
|
|
|
|
unsigned int size;
|
|
|
|
|
#else
|
2013-03-21 11:48:27 +01:00
|
|
|
|
size_t size;
|
2013-04-06 14:50:46 +02:00
|
|
|
|
#endif
|
2013-03-21 11:48:27 +01:00
|
|
|
|
yajl_gen_get_buf(gen, &output, &size);
|
2013-03-24 09:30:05 +01:00
|
|
|
|
write(child_stdin, output, size);
|
|
|
|
|
write(child_stdin, "\n", 1);
|
2013-03-21 11:48:27 +01:00
|
|
|
|
yajl_gen_clear(gen);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2010-08-07 02:10:05 +02:00
|
|
|
|
/*
|
|
|
|
|
* Start a child-process with the specified command and reroute stdin.
|
|
|
|
|
* We actually start a $SHELL to execute the command so we don't have to care
|
2010-12-26 14:34:54 +01:00
|
|
|
|
* about arguments and such
|
2010-08-07 02:10:05 +02:00
|
|
|
|
*
|
|
|
|
|
*/
|
2010-08-05 05:09:59 +02:00
|
|
|
|
void start_child(char *command) {
|
2012-02-17 00:27:11 +01:00
|
|
|
|
/* Allocate a yajl parser which will be used to parse stdin. */
|
|
|
|
|
memset(&callbacks, '\0', sizeof(yajl_callbacks));
|
|
|
|
|
callbacks.yajl_map_key = stdin_map_key;
|
2012-08-21 13:52:15 +02:00
|
|
|
|
callbacks.yajl_boolean = stdin_boolean;
|
2012-02-17 00:27:11 +01:00
|
|
|
|
callbacks.yajl_string = stdin_string;
|
2012-12-02 13:20:06 +01:00
|
|
|
|
callbacks.yajl_integer = stdin_integer;
|
2012-02-17 00:27:11 +01:00
|
|
|
|
callbacks.yajl_start_array = stdin_start_array;
|
|
|
|
|
callbacks.yajl_end_array = stdin_end_array;
|
|
|
|
|
callbacks.yajl_start_map = stdin_start_map;
|
|
|
|
|
callbacks.yajl_end_map = stdin_end_map;
|
2012-02-17 00:41:58 +01:00
|
|
|
|
#if YAJL_MAJOR < 2
|
|
|
|
|
yajl_parser_config parse_conf = { 0, 0 };
|
|
|
|
|
|
|
|
|
|
parser = yajl_alloc(&callbacks, &parse_conf, NULL, (void*)&parser_context);
|
2013-04-06 14:50:46 +02:00
|
|
|
|
|
|
|
|
|
gen = yajl_gen_alloc(NULL, NULL);
|
2012-02-17 00:41:58 +01:00
|
|
|
|
#else
|
2012-02-17 00:27:11 +01:00
|
|
|
|
parser = yajl_alloc(&callbacks, NULL, &parser_context);
|
|
|
|
|
|
2013-03-21 11:48:27 +01:00
|
|
|
|
gen = yajl_gen_alloc(NULL);
|
2013-04-06 14:50:46 +02:00
|
|
|
|
#endif
|
2013-03-21 11:48:27 +01:00
|
|
|
|
|
2010-08-06 03:32:05 +02:00
|
|
|
|
if (command != NULL) {
|
2013-03-21 11:48:27 +01:00
|
|
|
|
int pipe_in[2]; /* pipe we read from */
|
|
|
|
|
int pipe_out[2]; /* pipe we write to */
|
|
|
|
|
|
|
|
|
|
if (pipe(pipe_in) == -1)
|
|
|
|
|
err(EXIT_FAILURE, "pipe(pipe_in)");
|
|
|
|
|
if (pipe(pipe_out) == -1)
|
|
|
|
|
err(EXIT_FAILURE, "pipe(pipe_out)");
|
2011-10-23 15:31:43 +02:00
|
|
|
|
|
2012-09-03 10:23:25 +02:00
|
|
|
|
child.pid = fork();
|
|
|
|
|
switch (child.pid) {
|
2010-08-06 03:32:05 +02:00
|
|
|
|
case -1:
|
2011-01-01 16:48:30 +01:00
|
|
|
|
ELOG("Couldn't fork(): %s\n", strerror(errno));
|
2010-08-06 03:32:05 +02:00
|
|
|
|
exit(EXIT_FAILURE);
|
|
|
|
|
case 0:
|
2013-03-21 11:48:27 +01:00
|
|
|
|
/* Child-process. Reroute streams and start shell */
|
2010-12-26 14:34:54 +01:00
|
|
|
|
|
2013-03-21 11:48:27 +01:00
|
|
|
|
close(pipe_in[0]);
|
|
|
|
|
close(pipe_out[1]);
|
|
|
|
|
|
|
|
|
|
dup2(pipe_in[1], STDOUT_FILENO);
|
|
|
|
|
dup2(pipe_out[0], STDIN_FILENO);
|
2010-12-26 14:34:54 +01:00
|
|
|
|
|
|
|
|
|
static const char *shell = NULL;
|
|
|
|
|
|
|
|
|
|
if ((shell = getenv("SHELL")) == NULL)
|
|
|
|
|
shell = "/bin/sh";
|
|
|
|
|
|
|
|
|
|
execl(shell, shell, "-c", command, (char*) NULL);
|
|
|
|
|
return;
|
2010-08-06 03:32:05 +02:00
|
|
|
|
default:
|
2013-03-21 11:48:27 +01:00
|
|
|
|
/* Parent-process. Reroute streams */
|
|
|
|
|
|
|
|
|
|
close(pipe_in[1]);
|
|
|
|
|
close(pipe_out[0]);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
|
2013-03-21 11:48:27 +01:00
|
|
|
|
dup2(pipe_in[0], STDIN_FILENO);
|
2013-03-24 09:30:05 +01:00
|
|
|
|
child_stdin = pipe_out[1];
|
2010-08-06 03:32:05 +02:00
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
2010-08-05 05:09:59 +02:00
|
|
|
|
|
2010-09-17 05:26:31 +02:00
|
|
|
|
/* We set O_NONBLOCK because blocking is evil in event-driven software */
|
2010-08-06 03:32:05 +02:00
|
|
|
|
fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
|
2011-10-21 20:30:46 +02:00
|
|
|
|
stdin_io = smalloc(sizeof(ev_io));
|
2012-09-03 10:11:01 +02:00
|
|
|
|
ev_io_init(stdin_io, &stdin_io_first_line_cb, STDIN_FILENO, EV_READ);
|
2010-08-07 02:10:05 +02:00
|
|
|
|
ev_io_start(main_loop, stdin_io);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
|
2010-08-06 03:32:05 +02:00
|
|
|
|
/* We must cleanup, if the child unexpectedly terminates */
|
2011-10-21 20:30:46 +02:00
|
|
|
|
child_sig = smalloc(sizeof(ev_child));
|
2012-09-03 10:23:25 +02:00
|
|
|
|
ev_child_init(child_sig, &child_sig_cb, child.pid, 0);
|
2010-08-06 03:32:05 +02:00
|
|
|
|
ev_child_start(main_loop, child_sig);
|
2010-08-05 05:09:59 +02:00
|
|
|
|
|
2012-03-26 17:36:00 +02:00
|
|
|
|
atexit(kill_child_at_exit);
|
|
|
|
|
}
|
|
|
|
|
|
2013-03-21 11:48:27 +01:00
|
|
|
|
void child_click_events_initialize(void) {
|
|
|
|
|
if (!child.click_events_init) {
|
|
|
|
|
yajl_gen_array_open(gen);
|
|
|
|
|
child_write_output();
|
|
|
|
|
child.click_events_init = true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void child_click_events_key(const char *key) {
|
|
|
|
|
yajl_gen_string(gen, (const unsigned char *)key, strlen(key));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Generates a click event, if enabled.
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void send_block_clicked(int button, const char *name, const char *instance, int x, int y) {
|
|
|
|
|
if (child.click_events) {
|
|
|
|
|
child_click_events_initialize();
|
|
|
|
|
|
|
|
|
|
yajl_gen_map_open(gen);
|
|
|
|
|
|
|
|
|
|
if (name) {
|
|
|
|
|
child_click_events_key("name");
|
|
|
|
|
yajl_gen_string(gen, (const unsigned char *)name, strlen(name));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (instance) {
|
|
|
|
|
child_click_events_key("instance");
|
|
|
|
|
yajl_gen_string(gen, (const unsigned char *)instance, strlen(instance));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
child_click_events_key("button");
|
|
|
|
|
yajl_gen_integer(gen, button);
|
|
|
|
|
|
|
|
|
|
child_click_events_key("x");
|
|
|
|
|
yajl_gen_integer(gen, x);
|
|
|
|
|
|
|
|
|
|
child_click_events_key("y");
|
|
|
|
|
yajl_gen_integer(gen, y);
|
|
|
|
|
|
|
|
|
|
yajl_gen_map_close(gen);
|
|
|
|
|
child_write_output();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-26 17:36:00 +02:00
|
|
|
|
/*
|
|
|
|
|
* kill()s the child-process (if any). Called when exit()ing.
|
|
|
|
|
*
|
|
|
|
|
*/
|
2012-08-23 12:55:28 +02:00
|
|
|
|
void kill_child_at_exit(void) {
|
2012-09-03 10:23:25 +02:00
|
|
|
|
if (child.pid > 0) {
|
2012-08-20 22:20:37 +02:00
|
|
|
|
if (child.cont_signal > 0 && child.stopped)
|
|
|
|
|
kill(child.pid, child.cont_signal);
|
2012-09-03 10:23:25 +02:00
|
|
|
|
kill(child.pid, SIGTERM);
|
2012-03-26 17:36:00 +02:00
|
|
|
|
}
|
2010-08-05 05:09:59 +02:00
|
|
|
|
}
|
|
|
|
|
|
2010-08-07 02:10:05 +02:00
|
|
|
|
/*
|
2010-08-25 18:31:03 +02:00
|
|
|
|
* kill()s the child-process (if existent) and closes and
|
2010-08-07 02:10:05 +02:00
|
|
|
|
* free()s the stdin- and sigchild-watchers
|
|
|
|
|
*
|
|
|
|
|
*/
|
2012-08-23 12:55:28 +02:00
|
|
|
|
void kill_child(void) {
|
2012-09-03 10:23:25 +02:00
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if (child.pid > 0) {
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2012-08-20 22:20:37 +02:00
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if (child.cont_signal > 0 && child.stopped)
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kill(child.pid, child.cont_signal);
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2012-09-03 10:23:25 +02:00
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kill(child.pid, SIGTERM);
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2011-03-14 09:17:06 +01:00
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int status;
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2012-09-03 10:23:25 +02:00
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waitpid(child.pid, &status, 0);
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2011-03-14 09:17:06 +01:00
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cleanup();
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2010-08-06 03:32:05 +02:00
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}
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2010-08-05 05:09:59 +02:00
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}
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2010-08-25 18:31:03 +02:00
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/*
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* Sends a SIGSTOP to the child-process (if existent)
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*
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*/
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2012-08-23 12:55:28 +02:00
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void stop_child(void) {
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2012-08-20 22:20:37 +02:00
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if (child.stop_signal > 0 && !child.stopped) {
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child.stopped = true;
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kill(child.pid, child.stop_signal);
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2010-08-25 18:31:03 +02:00
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}
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}
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/*
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* Sends a SIGCONT to the child-process (if existent)
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*
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*/
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2012-08-23 12:55:28 +02:00
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void cont_child(void) {
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2012-08-20 22:20:37 +02:00
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if (child.cont_signal > 0 && child.stopped) {
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child.stopped = false;
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kill(child.pid, child.cont_signal);
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2010-08-25 18:31:03 +02:00
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}
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}
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