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#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <string.h>
#include <wlr/types/wlr_xdg_activation_v1.h>
#include "sway/input/seat.h"
#include "sway/output.h"
#include "sway/desktop/launcher.h"
#include "sway/tree/node.h"
#include "sway/tree/container.h"
#include "sway/tree/workspace.h"
#include "sway/tree/root.h"
#include "log.h"
static struct wl_list pid_workspaces;
struct pid_workspace {
pid_t pid;
char *name;
struct wlr_xdg_activation_token_v1 *token;
struct wl_listener token_destroy;
struct sway_node *node;
struct wl_listener node_destroy;
struct wl_list link;
};
/**
* Get the pid of a parent process given the pid of a child process.
*
* Returns the parent pid or NULL if the parent pid cannot be determined.
*/
static pid_t get_parent_pid(pid_t child) {
pid_t parent = -1;
char file_name[100];
char *buffer = NULL;
const char *sep = " ";
FILE *stat = NULL;
size_t buf_size = 0;
snprintf(file_name, sizeof(file_name), "/proc/%d/stat", child);
if ((stat = fopen(file_name, "r"))) {
if (getline(&buffer, &buf_size, stat) != -1) {
strtok(buffer, sep); // pid
strtok(NULL, sep); // executable name
strtok(NULL, sep); // state
char *token = strtok(NULL, sep); // parent pid
parent = strtol(token, NULL, 10);
}
free(buffer);
fclose(stat);
}
if (parent) {
return (parent == child) ? -1 : parent;
}
return -1;
}
static void pid_workspace_destroy(struct pid_workspace *pw) {
wl_list_remove(&pw->node_destroy.link);
wl_list_remove(&pw->token_destroy.link);
wl_list_remove(&pw->link);
wlr_xdg_activation_token_v1_destroy(pw->token);
free(pw->name);
free(pw);
}
struct sway_workspace *root_workspace_for_pid(pid_t pid) {
if (!pid_workspaces.prev && !pid_workspaces.next) {
wl_list_init(&pid_workspaces);
return NULL;
}
struct sway_workspace *ws = NULL;
struct sway_output *output = NULL;
struct pid_workspace *pw = NULL;
sway_log(SWAY_DEBUG, "Looking up workspace for pid %d", pid);
do {
struct pid_workspace *_pw = NULL;
wl_list_for_each(_pw, &pid_workspaces, link) {
if (pid == _pw->pid) {
pw = _pw;
sway_log(SWAY_DEBUG,
"found %s match for pid %d: %s",
node_type_to_str(pw->node->type), pid, node_get_name(pw->node));
break;
}
}
pid = get_parent_pid(pid);
} while (pid > 1);
if (pw) {
switch (pw->node->type) {
case N_CONTAINER:
// Unimplemented
// TODO: add container matching?
ws = pw->node->sway_container->pending.workspace;
break;
case N_WORKSPACE:
ws = pw->node->sway_workspace;
break;
case N_OUTPUT:
output = pw->node->sway_output;
ws = workspace_by_name(pw->name);
if (!ws) {
sway_log(SWAY_DEBUG,
"Creating workspace %s for pid %d because it disappeared",
pw->name, pid);
if (!output->enabled) {
sway_log(SWAY_DEBUG,
"Workspace output %s is disabled, trying another one",
output->wlr_output->name);
output = NULL;
}
ws = workspace_create(output, pw->name);
}
break;
case N_ROOT:
ws = workspace_create(NULL, pw->name);
break;
}
pid_workspace_destroy(pw);
}
return ws;
}
static void pw_handle_node_destroy(struct wl_listener *listener, void *data) {
struct pid_workspace *pw = wl_container_of(listener, pw, node_destroy);
switch (pw->node->type) {
case N_CONTAINER:
// Unimplemented
break;
case N_WORKSPACE:;
struct sway_workspace *ws = pw->node->sway_workspace;
wl_list_remove(&pw->node_destroy.link);
wl_list_init(&pw->node_destroy.link);
// We want to save this ws name to recreate later, hopefully on the
// same output
free(pw->name);
pw->name = strdup(ws->name);
if (!ws->output || ws->output->node.destroying) {
// If the output is being destroyed it would be pointless to track
// If the output is being disabled, we'll find out if it's still
// disabled when we try to match it.
pw->node = &root->node;
break;
}
pw->node = &ws->output->node;
wl_signal_add(&pw->node->events.destroy, &pw->node_destroy);
break;
case N_OUTPUT:
wl_list_remove(&pw->node_destroy.link);
wl_list_init(&pw->node_destroy.link);
// We'll make the ws pw->name somewhere else
pw->node = &root->node;
break;
case N_ROOT:
// Unreachable
break;
}
}
static void token_handle_destroy(struct wl_listener *listener, void *data) {
struct pid_workspace *pw = wl_container_of(listener, pw, token_destroy);
pw->token = NULL;
pid_workspace_destroy(pw);
}
void root_record_workspace_pid(pid_t pid) {
sway_log(SWAY_DEBUG, "Recording workspace for process %d", pid);
if (!pid_workspaces.prev && !pid_workspaces.next) {
wl_list_init(&pid_workspaces);
}
struct sway_seat *seat = input_manager_current_seat();
struct sway_workspace *ws = seat_get_focused_workspace(seat);
if (!ws) {
sway_log(SWAY_DEBUG, "Bailing out, no workspace");
return;
}
struct pid_workspace *pw = calloc(1, sizeof(struct pid_workspace));
struct wlr_xdg_activation_token_v1 *token =
wlr_xdg_activation_token_v1_create(server.xdg_activation_v1);
token->data = pw;
pw->name = strdup(ws->name);
pw->token = token;
pw->node = &ws->node;
pw->pid = pid;
pw->node_destroy.notify = pw_handle_node_destroy;
wl_signal_add(&pw->node->events.destroy, &pw->node_destroy);
pw->token_destroy.notify = token_handle_destroy;
wl_signal_add(&token->events.destroy, &pw->token_destroy);
wl_list_insert(&pid_workspaces, &pw->link);
}
void root_remove_workspace_pid(pid_t pid) {
if (!pid_workspaces.prev || !pid_workspaces.next) {
return;
}
struct pid_workspace *pw, *tmp;
wl_list_for_each_safe(pw, tmp, &pid_workspaces, link) {
if (pid == pw->pid) {
pid_workspace_destroy(pw);
return;
}
}
}
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