*: use _exit() in sighandlers; showkey: do not use exit-thru-sighandler

While at it, make ESC sequences more readable; and removed check for
isatty(stdin) in reset. Code shrink:

   text    data     bss     dec     hex filename
 884771     936   17216  902923   dc70b busybox_old
 884723     936   17216  902875   dc6db busybox_unstripped

Signed-off-by: Marek Polacek <mmpolacek@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/miscutils/less.c b/miscutils/less.c
index 500059d2a..9e12c11a7 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -28,13 +28,15 @@
 #include "xregex.h"
 #endif
 
+
+#define ESC "\033"
 /* The escape codes for highlighted and normal text */
-#define HIGHLIGHT   "\033[7m"
-#define NORMAL      "\033[0m"
+#define HIGHLIGHT   ESC"[7m"
+#define NORMAL      ESC"[0m"
 /* The escape code to home and clear to the end of screen */
-#define CLEAR       "\033[H\033[J"
+#define CLEAR       ESC"[H\033[J"
 /* The escape code to clear to the end of line */
-#define CLEAR_2_EOL "\033[K"
+#define CLEAR_2_EOL ESC"[K"
 
 enum {
 /* Absolute max of lines eaten */
@@ -165,12 +167,12 @@ static void set_tty_cooked(void)
    top-left corner of the console */
 static void move_cursor(int line, int row)
 {
-        printf("\033[%u;%uH", line, row);
+        printf(ESC"[%u;%uH", line, row);
 }
 
 static void clear_line(void)
 {
-        printf("\033[%u;0H" CLEAR_2_EOL, max_displayed_line + 2);
+        printf(ESC"[%u;0H" CLEAR_2_EOL, max_displayed_line + 2);
 }
 
 static void print_hilite(const char *str)