less: interpret backspace.

less is officially declared PAGER-capable! ;)
(this includes viewing of manpages)

1 files changed, 13 insertions, 0 deletions

diff --git a/miscutils/less.c b/miscutils/less.c
index 916213082..ae936c2fb 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -212,11 +212,21 @@ static void read_lines(void)
                                 }
                         }
                         c = readbuf[readpos];
+                        /* backspace? [need this for manpage display] */
+                        if (c == '\x8' && linepos) {
+                                readpos++; /* eat it */
+                                /* We do not consider the case of <tab><bs> */
+                                /* Anyone who has that is pure evil :) */
+                                linepos--;
+                                *p-- = '\0';
+                                continue;
+                        }
                         if (c == '\t')
                                 linepos += (linepos^7) & 7;
                         linepos++;
                         if (linepos >= w)
                                 break;
+                        /* ok, we will eat this char */
                         readpos++;
                         if (c == '\n') { terminated = 1; break; }
                         /* NUL is substituted by '\n'! */
@@ -1175,6 +1185,9 @@ int less_main(int argc, char **argv)
 {
         int keypress;
 
+        /* TODO: -x: do not interpret backspace, -xx: tab also */
+        /* -xxx: newline also */
+        /* -w N: assume width N (-xxx -w 32: hex viewer of sorts) */
         getopt32(argc, argv, "EMmN~");
         argc -= optind;
         argv += optind;