base64 doesnt have -w option in Mac
Solution 1
Yes, the default macOS base64
implementation doesn't have the -w
flag. What does that flag do?
-w, --wrap=COLS
Wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping.
And here's the macOS man page for base64
:
-b count --break=count
Insert line breaks every count characters. Default is 0, which generates an unbroken stream.
So, the flag is called -b
in macOS, and it already defaults to 0
, which means base64
in macOS has the same behaviour as base64 -w0
on Linux. You'll have to detect which platform you run on to use the appropriate variation of the command. See here: Detect the OS from a Bash script; the platform name you're looking for for macOS is "Darwin".
Solution 2
In Mac's it's -b
, and the default is already 0.
$ man base64
...
OPTIONS
The following options are available:
-b count
--break=count Insert line breaks every count characters. Default is 0, which generates an unbroken stream.
...
One way to have the script work for both is checking for errors:
MYCOMMAND=$(base64 -w0 commands.sh)
if [ $? -ne 0 ]; then
MYCOMMAND=$(base64 commands.sh)
fi
You can also run an explicit test, e.g
echo | base64 -w0 > /dev/null 2>&1
if [ $? -eq 0 ]; then
# GNU coreutils base64, '-w' supported
MYCOMMAND=$(base64 -w0 commands.sh)
else
# Openssl base64, no wrapping by default
MYCOMMAND=$(base64 commands.sh)
fi
Comments
-
ambikanair almost 2 years
I am trying to use base64 but the script doesn't run successfully in Ubuntu machine
MYCOMMAND=$(base64 commands.sh)
So in Ubuntu , I have to use
MYCOMMAND=$(base64 -w0 commands.sh)
unfortunately this option is not there in Mac. How can i write a single script which runs both in Mac and Ubuntu