How to use/execute "Read command of unix in sas macro" - macros

Question

Below is the script which I am using to execute the "read sub" but unfortunately not able to get the desired result.
#!/bin/sh
{
echo '%macro read;'
echo '%sysexec ( echo -n "Sub setting condition:");'
echo '%sysexec ( read sub) ;'
echo '%sysexec ( echo "Checking the macro [$sub]");'
echo '%mend;'
echo '%read;'
} > "/home/read.sas"
cd /home
sas /home/read.sas
Below is the result which I was expecting from above script:
Checking the macro [<text after entering the sub setting condition:>]
Thank you in advance for your help.

Answer 1

Your output is probably saved in the sas log file.
See sample command below: specifying the file to execute and where to save the log file:
/sas/940/SASFoundation/9.4/sas /projects/program1.sas -log "/projects/program1.log"

Answer 2

Make sure that the .sas file you are executing is the SAS program not the file containing the macro function only.

Answer 3

You need to explain what you are trying to do. Your program might succeed in getting user input from the console, but the value will be stored in an environment variable that the SAS code cannot access.
You might be able to retrieve the value entered by writing it to a file and then reading from the file. But you need to make sure the read command and the command that references the environment variable read run in the same sub-shell.
So if I create this program as read.sas.
data _null_;
call system ( 'echo -n "Sub setting condition:";read sub ; echo "Sub is $sub" >read.txt ' );
run;
data _null_;
infile 'read.txt';
input;
put _infile_;
run;
And run it using sas read. Then the SAS log looks like this:
1 data _null_;
2 call system ( 'echo -n "Sub setting condition:";read sub ; echo "Su
b is $sub" >read.txt ' );
3 run;
NOTE: DATA statement used (Total process time):
real time 2.80 seconds
cpu time 0.02 seconds
4 data _null_;
5 infile 'read.txt';
6 input;
7 put _infile_;
8 run;
NOTE: The infile 'read.txt' is:
Filename=.../test/read.txt,
Owner Name=xxxx,Group Name=xxx,
Access Permission=-rw-rw-r--,
Last Modified=05Apr2018:08:45:02,
File Size (bytes)=16
Sub is Hi there
NOTE: 1 record was read from the infile 'read.txt'.
The minimum record length was 15.
The maximum record length was 15.
NOTE: DATA statement used (Total process time):
real time 0.00 seconds
cpu time 0.00 seconds