Add a new article on termios

1 files changed, 47 insertions, 0 deletions

diff --git a/src/blog/termios/enable-xoff-xon.diff b/src/blog/termios/enable-xoff-xon.diff
new file mode 100644
index 0000000..64841d2
--- /dev/null
+++ b/src/blog/termios/enable-xoff-xon.diff
@@ -0,0 +1,47 @@
+ #include <curses.h>
+ #include <stdio.h>
++#include <stdlib.h>
+ #include <termios.h>
+ #include <unistd.h>
+ #include <vis.h>
+
++static void restore_tcattrs(void);
++
++struct termios old_attrs;
++
+ int
+ main(void)
+ {
+ 	struct termios tp;
+ 	tcgetattr(STDIN_FILENO, &tp);
++	old_attrs = tp;
+ 	tp.c_iflag &= ~(IXANY | IXON | IXOFF);
+ 	tcsetattr(STDIN_FILENO, TCSANOW, &tp);
++	atexit(restore_tcattrs);
+
+ 	initscr();                  /* Init screen */
+ 	noecho();                   /* Don’t echo keypresses */
+@@ -25,19 +18,10 @@
+ 	for (;;) {
+ 		/* Read char and encode it as a string  */
+ 		char buf[5];
++		int ch = getch();
++		if (ch == '\x11')       /* ^Q */
++			break;
++		vis(buf, ch, VIS_WHITE, 0);
+-		vis(buf, getch(), VIS_WHITE, 0);
+
+ 		clear();                /* Clear screen */
+ 		printw("%s\n", buf);    /* Write char to screen */
+ 		refresh();              /* Refresh display */
+ 	}
+-	/* unreachable */
++	endwin();                   /* Destroy screen */
++	return EXIT_SUCCESS;
+ }
++
++void
++restore_tcattrs(void)
++{
++	tcsetattr(STDIN_FILENO, TCSANOW, &old_attrs);
++}