aboutsummaryrefslogtreecommitdiff
path: root/desktop/slstatuso/slstatus.c
diff options
context:
space:
mode:
Diffstat (limited to 'desktop/slstatuso/slstatus.c')
-rwxr-xr-xdesktop/slstatuso/slstatus.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/desktop/slstatuso/slstatus.c b/desktop/slstatuso/slstatus.c
new file mode 100755
index 0000000..cb54f29
--- /dev/null
+++ b/desktop/slstatuso/slstatus.c
@@ -0,0 +1,132 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <X11/Xlib.h>
+
+#include "arg.h"
+#include "slstatus.h"
+#include "util.h"
+
+struct arg {
+ const char *(*func)(const char *);
+ const char *fmt;
+ const char *args;
+};
+
+char buf[1024];
+static volatile sig_atomic_t done;
+static Display *dpy;
+
+#include "config.h"
+
+static void
+terminate(const int signo)
+{
+ if (signo != SIGUSR1)
+ done = 1;
+}
+
+static void
+difftimespec(struct timespec *res, struct timespec *a, struct timespec *b)
+{
+ res->tv_sec = a->tv_sec - b->tv_sec - (a->tv_nsec < b->tv_nsec);
+ res->tv_nsec = a->tv_nsec - b->tv_nsec +
+ (a->tv_nsec < b->tv_nsec) * 1E9;
+}
+
+static void
+usage(void)
+{
+ die("usage: %s [-s] [-1]", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct sigaction act;
+ struct timespec start, current, diff, intspec, wait;
+ size_t i, len;
+ int sflag, ret;
+ char status[MAXLEN];
+ const char *res;
+
+ sflag = 0;
+ ARGBEGIN {
+ case '1':
+ done = 1;
+ /* FALLTHROUGH */
+ case 's':
+ sflag = 1;
+ break;
+ default:
+ usage();
+ } ARGEND
+
+ if (argc)
+ usage();
+
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = terminate;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+ act.sa_flags |= SA_RESTART;
+ sigaction(SIGUSR1, &act, NULL);
+
+ if (!sflag && !(dpy = XOpenDisplay(NULL)))
+ die("XOpenDisplay: Failed to open display");
+
+ do {
+ if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
+ die("clock_gettime:");
+
+ status[0] = '\0';
+ for (i = len = 0; i < LEN(args); i++) {
+ if (!(res = args[i].func(args[i].args)))
+ res = unknown_str;
+
+ if ((ret = esnprintf(status + len, sizeof(status) - len,
+ args[i].fmt, res)) < 0)
+ break;
+
+ len += ret;
+ }
+
+ if (sflag) {
+ puts(status);
+ fflush(stdout);
+ if (ferror(stdout))
+ die("puts:");
+ } else {
+ if (XStoreName(dpy, DefaultRootWindow(dpy), status) < 0)
+ die("XStoreName: Allocation failed");
+ XFlush(dpy);
+ }
+
+ if (!done) {
+ if (clock_gettime(CLOCK_MONOTONIC, &current) < 0)
+ die("clock_gettime:");
+ difftimespec(&diff, &current, &start);
+
+ intspec.tv_sec = interval / 1000;
+ intspec.tv_nsec = (interval % 1000) * 1E6;
+ difftimespec(&wait, &intspec, &diff);
+
+ if (wait.tv_sec >= 0 &&
+ nanosleep(&wait, NULL) < 0 &&
+ errno != EINTR)
+ die("nanosleep:");
+ }
+ } while (!done);
+
+ if (!sflag) {
+ XStoreName(dpy, DefaultRootWindow(dpy), NULL);
+ if (XCloseDisplay(dpy) < 0)
+ die("XCloseDisplay: Failed to close display");
+ }
+
+ return 0;
+}