First version.

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
index 0000000..1fd9fb2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,3 @@
+
+show-time: show-time.o
+       $(CC) -o $@ $<

diff --git a/show-time.c b/show-time.c
new file mode 100644 (file)
index 0000000..4e4369f
--- /dev/null
+++ b/show-time.c
@@ -0,0 +1,47 @@
+
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+
+#define false 0
+#define true (!false)
+#define null 0
+
+int getColumns() {
+       struct winsize terminalSize;
+       int error;
+
+       error = ioctl(1, TIOCGWINSZ, &terminalSize);
+
+       if (!error) {
+               return terminalSize.ws_col;
+       }
+       return 80;
+}
+
+int main(int argc, char** argv) {
+       
+       struct tm *localTime;
+       time_t currentTime;
+       char buffer[80];
+
+       if (fork() != 0) {
+               return 0;
+       }
+
+       while (true) {
+               currentTime = time(null);
+               localTime = localtime(&currentTime);
+               strftime(buffer, 80, "%d.%m.%Y %H:%M:%S", localTime);
+               printf("%c[s", 27); /* save cursor position */
+               printf("%c[%d;%dH", 27, 1, (int) (getColumns() - strlen(buffer))); /* set cursor */
+               printf("%s", buffer);
+               printf("%c[u", 27); /* restore cursor position */
+               fflush(stdout);
+               sleep(1);
+       }
+
+}
+