app-text/fbpdf/files/0004-redraw-on-SIGUSR1.patch

   1 From ffde3048b9c7291172ffc98b47dc8abe644f9cd6 Mon Sep 17 00:00:00 2001
   2 From: "S. Gilles" <sgilles@math.umd.edu>
   3 Date: Mon, 4 Feb 2019 09:41:13 -0500
   4 Subject: [PATCH 4/5] redraw on SIGUSR1
   5
   6 ---
   7  fbpdf.c | 16 ++++++++++++++--
   8  1 file changed, 14 insertions(+), 2 deletions(-)
   9
  10 diff --git a/fbpdf.c b/fbpdf.c
  11 index b006af0..e50b045 100644
  12 --- a/fbpdf.c
  13 +++ b/fbpdf.c
  14 @@ -51,6 +51,7 @@ static int zoom = 15;
  15  static int zoom_def = 15;      /* default zoom */
  16  static int rotate;
  17  static int count;
  18 +static sig_atomic_t should_redraw;
  19
  20  static void draw(void)
  21  {
  22 @@ -116,8 +117,13 @@ static int readkey(void)
  23  {
  24         unsigned char b;
  25  again:
  26 -       if (read(0, &b, 1) <= 0)
  27 +       if (read(0, &b, 1) <= 0) {
  28 +               if (should_redraw) {
  29 +                       should_redraw = 0;
  30 +                       return 'e';
  31 +               }
  32                 return -1;
  33 +       }
  34
  35         if (b != 27)
  36                 return b;
  37 @@ -173,6 +179,11 @@ static void sigcont(int sig)
  38         term_setup();
  39  }
  40
  41 +static void sigreload(int sig)
  42 +{
  43 +       should_redraw = 1;
  44 +}
  45 +
  46  static int reload(void)
  47  {
  48         doc_close(doc);
  49 @@ -220,7 +231,8 @@ static void mainloop(void)
  50         int hstep = scols / PAGESTEPS;
  51         int c;
  52         term_setup();
  53 -       signal(SIGCONT, sigcont);
  54 +       sigaction(SIGCONT, &(struct sigaction){.sa_handler = sigcont}, 0);
  55 +       sigaction(SIGUSR1, &(struct sigaction){.sa_handler = sigreload}, 0);
  56         loadpage(num);
  57         srow = prow;
  58         scol = -scols / 2;
  59 --
  60 2.20.1
  61