eval and execute: Changed how they work. Main difference is that eval returns the output of the function while execute merges the parent process's and child process's stdstreams

src/fsh.nim

@@ -146,18 +146,22 @@ proc parseCommand(cmd: string): seq[string] =
       else: newitem.add(c)
 
 # executes executes the command. For now it involves catting the command and printing it
-proc execute(cmd: seq[string]): string =
-  let progname=cmd[0]
-  let args = cmd[1..cmd.high]
-  let ps = startProcess(progname, args=args, options={poUsePath})
-  result=ps.outputStream.readAll
+proc execute(cmd: string): int =
+  let parsed = cmd.parseCommand
+  let progname = parsed[0]
+  let args = parsed[1..parsed.high]
+  let ps = startProcess(progname, args=args, options={poUsePath, poParentStreams})
+  result =  ps.waitForExit
   ps.close
-  
 
 # eval evaluates the given string
 proc eval(cmd: string): string =
   let parsed = cmd.parseCommand
-  result = parsed.execute
+  let progname=parsed[0]
+  let args = parsed[1..parsed.high]
+  let ps = startProcess(progname, args=args, options={poUsePath})
+  result=ps.outputStream.readAll
+  ps.close
 
 when isMainModule:
   let stdinstrm = stdin.newFileStream