From mboxrd@z Thu Jan 1 00:00:00 1970 From: don@DonHopkins.com (Don Hopkins) Date: Tue, 7 Nov 2017 16:33:59 +0100 Subject: [TUHS] Literal character escapes in v7 In-Reply-To: References: Message-ID: I have always been a proponent of generalizing /dev/zero such that it supports both block and character mode, and the minor node number specifies the byte you get mapped into memory or read from a file. So then you could just make a character device /dev/backspace whose minor node number was 8, and /dev/beep whose minor node number was 7! -Don > On 7 Nov 2017, at 05:21, Will Senn wrote: > > I wrote a snippet from my K&R C studies to convert tabs and backspaces to \t \b to display them, the code looks like this: > > /* ex 1-8 */ > > main() > { > int c, sf; > > while((c = getchar()) != EOF) { > if(c == '\t') > printf("\\t"); > if(c == '\b') > printf("\\b"); > else > putchar(c); > } > } > > I'm not looking for code review, but the code is intended to replace the tabs and backspaces with \t and \b respectively, but I haven't been able to test it because I can't seem to make a backspace character appear in input. In later unices, ^V followed by the backspace would work, but that's not part of v7. Backspace itself is my erase character, so anytime I just type it, it backspaces :). > > Thanks, > > Will > > -- > GPG Fingerprint: 68F4 B3BD 1730 555A 4462 7D45 3EAA 5B6D A982 BAAF >