POSIX shell incompatibilities 
------------------------------

                 Key: COUCHDB-169
                 URL: https://issues.apache.org/jira/browse/COUCHDB-169
             Project: CouchDB
          Issue Type: Bug
          Components: Infrastructure
         Environment: Solaris
            Reporter: Noah Slater
            Assignee: Noah Slater


> My local "checkbashisms" doesn't seem to complain at all. The [ ... ] syntax 
> is just a shortcut for "test" and I would prefer to avoid it if possible. 
> Could you check for me that using "test expr" wouldn't work in its place.     
>                                   
                                                                                
                        
No, "test expr" doesn't work. After test you can only have arguments to test, 
not shell expressions. It is possible of course to do:                          
                  
                                                                                
                        
if test `echo 2> /dev/null >> $PID_FILE; echo $?` -gt 0; then                   
                        
                                                                                
                        
For proof, see the man page: 
http://docs.sun.com/app/docs/doc/816-5165/test-1?l=en&q=man&a=view         
                                                                                
                        
> This seems reasonable, though checkbashisms doesn't report anything.          
>                         
>                                                                               
>                         
> I am wondering if your Solaris shell is POSIXly correct. Could you provide me 
> with a pointer to its manual, please?                                         
>                         
                                                                                
                        
It doesn't get more POSIX than Solaris :).                                      
                        
                                                                                
                        
$ /bin/sh                                                                       
                        
$ echo $(echo yes)                                                              
                        
syntax error: `(' unexpected                                                    
                        
                                                                                
                        
Here is the man page. Note that the "Command substitution" section doesn't 
mention anything about $() syntax.                                              
                        
                                                                                
                        
http://docs.sun.com/app/docs/doc/816-5165/sh-1?l=en&q=man&a=view

You may want to have a our collaborative notes over there:     
                                         
 - http://wiki.joyent.com/accelerators:setup-couchdb                            
                         
 - http://discuss.joyent.com/viewtopic.php?id=24108  

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