.

bac2/os/chap1/group.c

@@ -0,0 +1,50 @@
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <termios.h>
+#include <assert.h>
+#include <string.h>
+
+struct {
+	int index;
+	char tab[1024];
+} buf = {0};
+
+struct termios term, previous; // the previous state has to be restored... if not the term stay in that mode
+
+void handler(int sig){
+	switch (sig) {
+		case SIGALRM:
+			for (int i = 0; i < buf.index; ++i) {
+				if(!buf.tab[i])
+					continue;
+				printf("%c", buf.tab[i] + 'A' - 'a');
+			}
+			alarm(5);
+			break;
+		default:
+			tcsetattr(STDIN_FILENO, TCSANOW, &previous);
+			raise(sig);
+			assert(1);
+			break;
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	signal(SIGALRM, handler);
+	signal(SIGINT, handler);
+
+	tcgetattr(STDIN_FILENO, &previous);
+    memcpy(&term, &previous, sizeof(struct termios));
+	term.c_lflag &= ~ICANON;
+	tcsetattr(STDIN_FILENO, TCSANOW, &term);
+
+	alarm(5);
+	
+	while(1){
+		buf.tab[buf.index++] = getchar();
+	}
+	assert(1);
+}