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Set environment variable LABWC_PID

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...to the pid of the compositor so that SIGHUP and SIGTERM can be sent to
specific instances using `kill -s <signal> <pid>` rather than
`killall -s <signal> labwc`

Issue #573
This commit is contained in:
Johan Malm 2022-10-04 21:48:57 +01:00 • committed by Consolatis
parent 3d8f528266
commit 2c06b902f4
1 changed files with 14 additions and 0 deletions
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14
src/main.c
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@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
#define _POSIX_C_SOURCE 200809L
#include <string.h>
#include <unistd.h>
#include "common/dir.h"
#include "common/fd_util.h"
#include "common/font.h"
@ -81,6 +82,19 @@ main(int argc, char *argv[])
session_environment_init(rc.config_dir);
rcxml_read(config_file);
/*
* Set environment variable LABWC_PID to the pid of the compositor
* so that SIGHUP and SIGTERM can be sent to specific instances using
* `kill -s <signal> <pid>` rather than `killall -s <signal> labwc`
*/
char pid[32];
snprintf(pid, sizeof(pid), "%d", getpid());
if (setenv("LABWC_PID", pid, true) < 0) {
wlr_log_errno(WLR_ERROR, "unable to set LABWC_PID");
} else {
wlr_log(WLR_DEBUG, "LABWC_PID=%s", pid);
}
if (!getenv("XDG_RUNTIME_DIR")) {
wlr_log(WLR_ERROR, "XDG_RUNTIME_DIR is unset");
exit(EXIT_FAILURE);