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polytree-session
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Set datetime

This commit is contained in:
Alex Kotov 2021-11-15 06:12:28 +05:00
parent a26b6e2b33
commit c21fca1a72
Signed by: kotovalexarian
GPG Key ID: 553C0EBBEB5D5F08
2 changed files with 75 additions and 4 deletions
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10
config.mk
View File

@ -7,8 +7,14 @@ SYSPREFIX = /usr
ICONSPREFIX = $(SYSPREFIX)/share/icons
XSESSIONSPREFIX = $(SYSPREFIX)/share/xsessions
INCS =
LIBS =
X11INC = /usr/X11R6/include
X11LIB = /usr/X11R6/lib
# FreeBSD (uncomment)
#X11INC = /usr/local/include
#X11LIB = /usr/local/lib
INCS = -I${X11INC}
LIBS = -L${X11LIB} -lX11 -lpthread
CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\"
CFLAGS = -std=c99 -pedantic -Wall -Wextra -Os $(INCS) $(CPPFLAGS)

69
main.c
View File

@ -1,11 +1,21 @@
#include <pthread.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <X11/Xlib.h>
#define WM_STARTUP_TIME_SEC 3
static bool datetime_running = false;
static Display *datetime_display = NULL;
static pthread_t datetime_thread;
static bool datetime_thread_created = false;
static bool datetime_start();
static void datetime_stop();
static void *datetime_run(void *arg);
int main()
{
@ -23,10 +33,65 @@ int main()
exit(EXIT_FAILURE);
}
for (unsigned int i = 0; i < WM_STARTUP_TIME_SEC; ++i) sleep(1);
datetime_start();
int wm_status;
waitpid(wm_pid, &wm_status, 0);
datetime_stop();
exit(WEXITSTATUS(wm_status));
}
bool datetime_start()
{
// TODO: maybe we should assert
if (datetime_running) return false;
datetime_running = true;
if ((datetime_display = XOpenDisplay(NULL)) == NULL) {
datetime_stop();
return false;
}
if (!(datetime_thread_created =
pthread_create(&datetime_thread, NULL, datetime_run, NULL) == 0))
{
datetime_stop();
return false;
}
return true;
}
void datetime_stop()
{
// TODO: maybe we should assert
if (!datetime_running) return;
datetime_running = false;
if (datetime_thread_created) pthread_join(datetime_thread, NULL);
if (datetime_display) XCloseDisplay(datetime_display);
}
void *datetime_run(__attribute__((unused)) void *const arg)
{
while (datetime_running) {
time_t curr_time;
time(&curr_time);
const struct tm *const curr_tm = localtime(&curr_time);
char buffer[256];
strftime(buffer, sizeof(buffer), "%a, %e %b %Y, %H:%M:%S", curr_tm);
XStoreName(datetime_display,
DefaultRootWindow(datetime_display),
buffer);
XSync(datetime_display, False);
sleep(1);
}
return NULL;
}