2020-12-06 20:20:40 (UTC-03:00)

Marcel Rodrigues <marcelgmr@gmail.com>

term: add skeleton for SIGWINCH handling

diff --git a/term.c b/term.c
index 7d573ed..f3281c0 100644
--- a/term.c
+++ b/term.c
@@ -1,11 +1,36 @@
 #include "seqt.h"
 
+#include <string.h>
+#include <signal.h>
+
+#define get_terminal_size(TS)   ioctl(0, TIOCGWINSZ, (TS))
+
+#ifndef SIGWINCH
+#define SIGWINCH  28
+#endif
+
+volatile sig_atomic_t pending_winch;
+
+void
+handle_winch(int sig)
+{
+    (void) sig;
+    pending_winch = 1;
+}
+
 void
 setup_terminal(struct termios *term_prev, struct winsize *term_size)
 {
     struct termios term_raw;
+    struct sigaction sa;
 
+    /* setup signal handler */
+    memset(&sa, 0, sizeof (struct sigaction));
+    sa.sa_handler = handle_winch;
+    sigaction(SIGWINCH, &sa, NULL);
+    /* enter alternate screen buffer */
     printf("\x1B[?47h");
+    /* disable echo and canonical mode */
     tcgetattr(0, term_prev);
     term_raw = *term_prev;
     term_raw.c_lflag &= ~(ECHO | ICANON);
@@ -14,7 +39,7 @@ setup_terminal(struct termios *term_prev, struct winsize *term_size)
     term_raw.c_cc[VTIME] = 0;
     tcsetattr(0, TCSAFLUSH, &term_raw);
     /* get terminal size */
-    ioctl(0, TIOCGWINSZ, term_size);
+    get_terminal_size(term_size);
 }
 
 void