当生成错误时,会引发异常。异常通常是包含以下成员的对象:
code-与错误关联的数字代码
message-与错误关联的用户可读消息
异常可以被捕获并处理,否则可能会在脚本环境中被引发。如果脚本环境存在未捕获的异常,则 CLI 将显示详细信息。例如:
dory:> script run('not a cmd') error: uncaught error exception (code EAKSH_BADCMD) in script: invalid command "not a cmd" (encountered while attempting to run command "not a cmd")
可以通过捕获并转储异常来了解有关该异常的更多详细信息:
dory:> script try { run('not a cmd') } catch (err) { dump(err); } { toString: <function>, code: 10004, message: 'invalid command "not a cmd" (encountered while attempting to run command "not a cmd")' }
这还使您拥有丰富的错误处理方法,例如:
#!/usr/bin/ksh -p ssh -T root@dory <<EOF script try { run('shares select default select $1'); } catch (err) { if (err.code == EAKSH_ENTITY_BADSELECT) { printf('error: "$1" is not a share in the ' + 'default project\n'); exit(1); } throw (err); } printf('"default/$1": compression is %s\n', get('compression')); exit(0); EOF
如果该脚本的名称为 "share.ksh" 并使用无效的共享资源名称运行,将生成丰富的错误消息:
% ksh ./share.ksh bogus error: "bogus" is not a share in the default project