I was trying to do an OR logic in If condition
condition 1 => warning ="" and err_code !=1
OR
condition 2 => threshold =1 and threshold_load_ind=Y and err_code!=1
This is throwing an operator level issue . What is missing in the if code
if [ "$warn" != "" && "$err_ind" != 1 ] || [ $thres_err_ind == 1 && $thres_load_ind == "Y" && $err_ind != 1 ];then
error code at line 860
[860]: [: ']' missing
[860]: [: ']' missing
[ is regular command (with a funny name), not part of the shell syntax. Just to make it look confusingly like a syntax element, it expects to see ] as its last argument. But && and || are part of the shell syntax and they separate commands. So your if-statement has five commands, marked below:
if [ "$warn" != "" && "$err_ind" != 1 ] ||
1^^^^^^^^^^^^^^^ 2^^^^^^^^^^^^^^^^^
[ $thres_err_ind == 1 && $thres_load_ind == "Y" && $err_ind != 1 ];
3^^^^^^^^^^^^^^^^^^^^ 4^^^^^^^^^^^^^^^^^^^^^ 5^^^^^^^^^^^^^^
The first one runs [ with the three arguments containing the contents of $warn, !=, and an empty string. There's no ], so the [ command complains. Since it fails, the following command after && doesn't run, but the one after || does, and complains for the similar reason. (If the others would run, they'd probably give you "command not found" errors, since the variables are in command position, and if e.g. err_ind contained 0, the shell would try to run the command 0.)
Also, the shell's && and || operators have equal precedence, so a && bb || c && d acts like ( (a && bb) || c) && d, which is probably not what you want.
So, you need to both add the closing ] before the &&/||, and to group the commands manually:
if { [ ... ] && [ ... ]; } ||
{ [ ... ] && [ ... ] && [ ... ]; }; then ...
or with parentheses, which don't require the pesky ; at the end, but launch subshells, which is a slight performance loss:
if ( [ ... ] && [ ... ] ) ||
( [ ... ] && [ ... ] && [ ... ] ); then ...
Or switch to using the [[ test (in Bash/ksh/zsh), which is shell syntax and works with different rules and supports &&/||.
See:
