here strings fold newlines on MacOS

[Rich Lafferty]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: darwin18.7.0
Compiler: clang
Compilation CFLAGS: -DSSH_SOURCE_BASHRC
uname output: Darwin flounder.home.mati.ca 18.7.0 Darwin Kernel Version 18.7.0: 
Tue Nov 10 00:07:31 PST 2020; root:xnu-4903.278.51~1/RELEASE_X86_64 x86_64
Machine Type: x86_64-apple-darwin18.7.0

Bash Version: 5.1
Patch Level: 0
Release Status: release

Description:
Here strings ('<<<') fold newlines into spaces on MacOS, but not on Linux,
leading to incompatibilites in bash code expected to work the same on both
platforms.

Repeat-By:

On Linux:

$ od -bc <<< $(echo -e "foo\nbar")
000 146 157 157 012 142 141 162 012
 f o o \n b a r \n
010

On MacOS:

$ od -bc <<< $(echo -e "foo\nbar")
000 146 157 157 040 142 141 162 012
 f o o b a r \n
010

Re: here strings fold newlines on MacOS

[Rich Lafferty]

Ah, yep — sorry for the false positive. I *have* 5.1.0 installed (and bashbug 
picked that up!) but the context in which I encountered the bug was indeed 
Apple’s ancient version. I could’ve sworn I tested it in both, but clearly 
messed that up - verified it’s fixed in 5.1.0.

  -Rich

On Jan 31, 2021, 1:35 PM -0500, Chet Ramey , wrote:
> On 1/30/21 5:44 PM, Rich Lafferty wrote:
>
> > Bash Version: 5.1
> > Patch Level: 0
> > Release Status: release
> >
> > Description:
> > Here strings ('<<<') fold newlines into spaces on MacOS, but not on Linux,
> > leading to incompatibilites in bash code expected to work the same on both
> > platforms.
>
> This was fixed quite a while back, but still after Apple froze its version
> of bash at 3.2.57. Maybe you should file a bug report with Apple.
> (Just kidding, they don't care.)
>
>
> --
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
> ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/