gri3-wm/src/startup.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009-2011 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
* startup.c: Startup notification code
*
*/
#include <sys/types.h>
#include <sys/wait.h>
#define SN_API_NOT_YET_FROZEN 1
#include <libsn/sn-launcher.h>
#include "all.h"
/*
* Starts the given application by passing it through a shell. We use double fork
* to avoid zombie processes. As the started applications parent exits (immediately),
* the application is reparented to init (process-id 1), which correctly handles
* childs, so we dont have to do it :-).
*
* The shell is determined by looking for the SHELL environment variable. If it
* does not exist, /bin/sh is used.
*
*/
void start_application(const char *command) {
/* Create a startup notification context to monitor the progress of this
* startup. */
SnLauncherContext *context;
context = sn_launcher_context_new(sndisplay, conn_screen);
sn_launcher_context_set_name(context, "i3");
sn_launcher_context_set_description(context, "exec command in i3");
/* Chop off everything starting from the first space (if there are any
* spaces in the command), since we dont want the parameters. */
char *first_word = sstrdup(command);
char *space = strchr(first_word, ' ');
if (space)
*space = '\0';
sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
free(first_word);
LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
LOG("executing: %s\n", command);
if (fork() == 0) {
/* Child process */
setsid();
if (fork() == 0) {
/* Setup the environment variable(s) */
sn_launcher_context_setup_child_process(context);
/* Stores the path of the shell */
static const char *shell = NULL;
if (shell == NULL)
if ((shell = getenv("SHELL")) == NULL)
shell = "/bin/sh";
/* This is the child */
execl(shell, shell, "-c", command, (void*)NULL);
/* not reached */
}
exit(0);
}
wait(0);
}
/*
* Called by libstartup-notification when something happens
*
*/
void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
SnStartupSequence *sequence;
DLOG("something happened\n");
sequence = sn_monitor_event_get_startup_sequence(event);
switch (sn_monitor_event_get_type(event)) {
case SN_MONITOR_EVENT_COMPLETED:
DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(sequence));
break;
default:
/* ignore */
break;
}
}