mirror of https://github.com/swaywm/sway.git
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
#define _POSIX_C_SOURCE
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#include <fcntl.h>
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#include <json-c/json.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <wlr/util/log.h>
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#include "swaybar/config.h"
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#include "swaybar/status_line.h"
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#include "readline.h"
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void status_error(struct status_line *status, const char *text) {
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close(status->read_fd);
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close(status->write_fd);
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status->protocol = PROTOCOL_ERROR;
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status->text = text;
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}
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bool status_handle_readable(struct status_line *status) {
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char *line;
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switch (status->protocol) {
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case PROTOCOL_ERROR:
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return false;
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case PROTOCOL_I3BAR:
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if (i3bar_handle_readable(status) > 0) {
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return true;
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}
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break;
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case PROTOCOL_TEXT:
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line = read_line_buffer(status->read,
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status->text_state.buffer, status->text_state.buffer_size);
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if (!line) {
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status_error(status, "[error reading from status command]");
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} else {
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status->text = line;
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}
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return true;
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case PROTOCOL_UNDEF:
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line = read_line_buffer(status->read,
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status->text_state.buffer, status->text_state.buffer_size);
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if (!line) {
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status_error(status, "[error reading from status command]");
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return false;
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}
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if (line[0] == '{') {
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json_object *proto = json_tokener_parse(line);
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if (proto) {
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json_object *version;
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if (json_object_object_get_ex(proto, "version", &version)
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&& json_object_get_int(version) == 1) {
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wlr_log(L_DEBUG, "Switched to i3bar protocol.");
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status->protocol = PROTOCOL_I3BAR;
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}
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json_object *click_events;
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if (json_object_object_get_ex(
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proto, "click_events", &click_events)
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&& json_object_get_boolean(click_events)) {
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wlr_log(L_DEBUG, "Enabled click events.");
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status->i3bar_state.click_events = true;
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const char *events_array = "[\n";
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write(status->write_fd, events_array, strlen(events_array));
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}
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json_object_put(proto);
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}
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status->protocol = PROTOCOL_I3BAR;
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free(status->text_state.buffer);
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wl_list_init(&status->blocks);
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status->i3bar_state.buffer_size = 4096;
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status->i3bar_state.buffer =
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malloc(status->i3bar_state.buffer_size);
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} else {
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status->protocol = PROTOCOL_TEXT;
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status->text = line;
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}
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return true;
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}
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return false;
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}
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struct status_line *status_line_init(char *cmd) {
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struct status_line *status = calloc(1, sizeof(struct status_line));
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status->text_state.buffer_size = 8192;
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status->text_state.buffer = malloc(status->text_state.buffer_size);
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int pipe_read_fd[2];
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int pipe_write_fd[2];
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if (pipe(pipe_read_fd) != 0 || pipe(pipe_write_fd) != 0) {
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wlr_log(L_ERROR, "Unable to create pipes for status_command fork");
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exit(1);
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}
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status->pid = fork();
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if (status->pid == 0) {
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dup2(pipe_read_fd[1], STDOUT_FILENO);
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close(pipe_read_fd[0]);
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close(pipe_read_fd[1]);
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dup2(pipe_write_fd[0], STDIN_FILENO);
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close(pipe_write_fd[0]);
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close(pipe_write_fd[1]);
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char *const _cmd[] = { "sh", "-c", cmd, NULL, };
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execvp(_cmd[0], _cmd);
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exit(1);
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}
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close(pipe_read_fd[1]);
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status->read_fd = pipe_read_fd[0];
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fcntl(status->read_fd, F_SETFL, O_NONBLOCK);
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close(pipe_write_fd[0]);
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status->write_fd = pipe_write_fd[1];
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fcntl(status->write_fd, F_SETFL, O_NONBLOCK);
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status->read = fdopen(status->read_fd, "r");
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status->write = fdopen(status->write_fd, "w");
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return status;
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}
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void status_line_free(struct status_line *status) {
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close(status->read_fd);
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close(status->write_fd);
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kill(status->pid, SIGTERM);
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free(status);
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}
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