mirror of https://github.com/swaywm/sway.git
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <signal.h>
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#include "sway/commands.h"
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#include "sway/config.h"
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#include "sway/server.h"
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#include "sway/desktop/launcher.h"
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#include "sway/tree/container.h"
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#include "sway/tree/root.h"
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#include "sway/tree/workspace.h"
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#include "log.h"
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#include "stringop.h"
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struct cmd_results *cmd_exec_validate(int argc, char **argv) {
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struct cmd_results *error = NULL;
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if ((error = checkarg(argc, argv[-1], EXPECTED_AT_LEAST, 1))) {
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return error;
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}
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if (!config->active || config->validating) {
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return cmd_results_new(CMD_DEFER, NULL);
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}
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return error;
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}
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static void export_xdga_token(struct launcher_ctx *ctx) {
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const char *token = launcher_ctx_get_token_name(ctx);
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setenv("XDG_ACTIVATION_TOKEN", token, 1);
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}
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static void export_startup_id(struct launcher_ctx *ctx) {
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const char *token = launcher_ctx_get_token_name(ctx);
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setenv("DESKTOP_STARTUP_ID", token, 1);
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}
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struct cmd_results *cmd_exec_process(int argc, char **argv) {
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struct cmd_results *error = NULL;
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char *cmd = NULL;
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bool no_startup_id = false;
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if (strcmp(argv[0], "--no-startup-id") == 0) {
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no_startup_id = true;
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--argc; ++argv;
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if ((error = checkarg(argc, argv[-1], EXPECTED_AT_LEAST, 1))) {
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return error;
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}
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}
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if (argc == 1 && (argv[0][0] == '\'' || argv[0][0] == '"')) {
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cmd = strdup(argv[0]);
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strip_quotes(cmd);
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} else {
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cmd = join_args(argv, argc);
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}
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sway_log(SWAY_DEBUG, "Executing %s", cmd);
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int fd[2];
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if (pipe(fd) != 0) {
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sway_log(SWAY_ERROR, "Unable to create pipe for fork");
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}
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pid_t pid, child;
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struct launcher_ctx *ctx = launcher_ctx_create_internal();
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// Fork process
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if ((pid = fork()) == 0) {
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// Fork child process again
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restore_nofile_limit();
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setsid();
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sigset_t set;
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sigemptyset(&set);
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sigprocmask(SIG_SETMASK, &set, NULL);
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signal(SIGPIPE, SIG_DFL);
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close(fd[0]);
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if ((child = fork()) == 0) {
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close(fd[1]);
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if (ctx) {
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export_xdga_token(ctx);
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}
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if (ctx && !no_startup_id) {
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export_startup_id(ctx);
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}
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execlp("sh", "sh", "-c", cmd, (void *)NULL);
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sway_log_errno(SWAY_ERROR, "execlp failed");
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_exit(1);
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}
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ssize_t s = 0;
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while ((size_t)s < sizeof(pid_t)) {
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s += write(fd[1], ((uint8_t *)&child) + s, sizeof(pid_t) - s);
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}
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close(fd[1]);
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_exit(0); // Close child process
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} else if (pid < 0) {
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free(cmd);
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close(fd[0]);
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close(fd[1]);
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return cmd_results_new(CMD_FAILURE, "fork() failed");
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}
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free(cmd);
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close(fd[1]); // close write
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ssize_t s = 0;
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while ((size_t)s < sizeof(pid_t)) {
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s += read(fd[0], ((uint8_t *)&child) + s, sizeof(pid_t) - s);
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}
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close(fd[0]);
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// cleanup child process
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waitpid(pid, NULL, 0);
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if (child > 0) {
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sway_log(SWAY_DEBUG, "Child process created with pid %d", child);
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if (ctx != NULL) {
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sway_log(SWAY_DEBUG, "Recording workspace for process %d", child);
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ctx->pid = child;
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}
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} else {
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launcher_ctx_destroy(ctx);
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return cmd_results_new(CMD_FAILURE, "Second fork() failed");
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}
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return cmd_results_new(CMD_SUCCESS, NULL);
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}
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struct cmd_results *cmd_exec_always(int argc, char **argv) {
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struct cmd_results *error;
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if ((error = cmd_exec_validate(argc, argv))) {
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return error;
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}
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return cmd_exec_process(argc, argv);
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}
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