On Sat, Jun 28, 2014 at 06:52:51PM +0200, Harald van Dijk wrote: > On 28/06/14 06:56, Adam Borowski wrote: > > I'm not sure what's your policy towards extensions, but \e as \033 is > > something ubiquitous in the Unix world. C compilers (gcc, clang, icc and > > tcc -- but not MSVC), perl, shells (bash and zsh -- but not dash), etc. > > No comment on whether dash itself should accept \e, but you already > found a compiler that doesn't support it at all, and many of the ones > that do support it also (optionally) issue a warning for it. Should the > C code perhaps be using \033 instead of \e? I don't think anyone is going to ever port dash to MSVC, but you have a point: some other new compiler can appear. A version of the patch with \033 attached. -- Gnome 3, Windows 8, Slashdot Beta, now Firefox Ribbon^WAustralis. WTF is going on with replacing usable interfaces with tabletized ones?
>From a6e6e7b6f3a725b4ca0514f22e9ee4cfe2c225e2 Mon Sep 17 00:00:00 2001 From: Adam Borowski <kilobyte@xxxxxxxxxx> Date: Sat, 28 Jun 2014 06:29:56 +0200 Subject: [PATCH] Support \e in "echo" and "printf" builtins. Signed-off-by: Adam Borowski <kilobyte@xxxxxxxxxx> --- src/bltin/printf.c | 1 + src/dash.1 | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/src/bltin/printf.c b/src/bltin/printf.c index 893295c..98d954c 100644 --- a/src/bltin/printf.c +++ b/src/bltin/printf.c @@ -300,6 +300,7 @@ conv_escape(char *str, int *conv_ch) case '\\': value = '\\'; break; /* backslash */ case 'a': value = '\a'; break; /* alert */ case 'b': value = '\b'; break; /* backspace */ + case 'e': value = '\033'; break; /* escape */ case 'f': value = '\f'; break; /* form-feed */ case 'n': value = '\n'; break; /* newline */ case 'r': value = '\r'; break; /* carriage-return */ diff --git a/src/dash.1 b/src/dash.1 index 3847d98..7107faa 100644 --- a/src/dash.1 +++ b/src/dash.1 @@ -1199,6 +1199,8 @@ Subsequent output is suppressed. This is normally used at the end of the last argument to suppress the trailing newline that .Ic echo would otherwise output. +.It Li \ee +Outputs an escape character (ESC). .It Li \ef Output a form feed. .It Li \en @@ -1573,6 +1575,8 @@ The characters and their meanings are as follows: Write a \*[Lt]bell\*[Gt] character. .It Cm \eb Write a \*[Lt]backspace\*[Gt] character. +.It Cm \ee +Write an \*[Lt]escape\*[Gt] (ESC) character. .It Cm \ef Write a \*[Lt]form-feed\*[Gt] character. .It Cm \en -- 2.0.0
