【发布时间】：2020-07-25 23:11:16
【问题描述】：
我正在尝试创建一个名为 factorial 的文件，该文件可以使用 erlang 中的 escript 从命令行运行。我实际上是从documentation 复制确切的文件。
我的问题是，即使我做了chmod u+x factorial（以及后来的chmod a+x factorial），我也无法简单地做./factorial 5。我使用ls -l 检查我的文件是否具有正确的权限：
-rwxr-xr-x 1 josh staff 402 Jul 24 18:43 factorial
只有sudo ./factorial 5才能成功运行文件，这很痛苦，因为我的密码很长，我不想每次都使用sudo。
我不使用 sudo 时遇到的错误如下：
josh@MacBook-Pro test % ./factorial 5
2020-07-24 19:02:53.247288
args: []
format: "Error when reading /Users/josh/.erlang.cookie: eacces"
label: {error_logger,error_msg}
2020-07-24 19:02:53.247466 supervisor_report #{label=>{supervisor,start_error},report=>[{supervisor,{local,net_sup}},{errorContext,start_error},{reason,{"Error when reading /Users/josh/.erlang.cookie: eacces",[{auth,init_cookie,0,[{file,"auth.erl"},{line,286}]},{auth,init,1,[{file,"auth.erl"},{line,140}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,374}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}},{offender,[{pid,undefined},{id,auth},{mfargs,{auth,start_link,[]}},{restart_type,permanent},{shutdown,2000},{child_type,worker}]}]}
2020-07-24 19:02:53.247492 crash_report #{label=>{proc_lib,crash},report=>[[{initial_call,{auth,init,['Argument__1']}},{pid,<0.59.0>},{registered_name,[]},{error_info,{error,"Error when reading /Users/josh/.erlang.cookie: eacces",[{auth,init_cookie,0,[{file,"auth.erl"},{line,286}]},{auth,init,1,[{file,"auth.erl"},{line,140}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,374}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}},{ancestors,[net_sup,kernel_sup,<0.47.0>]},{message_queue_len,0},{messages,[]},{links,[<0.57.0>]},{dictionary,[]},{trap_exit,true},{status,running},{heap_size,987},{stack_size,27},{reductions,894}],[]]}
2020-07-24 19:02:53.247955 supervisor_report #{label=>{supervisor,start_error},report=>[{supervisor,{local,kernel_sup}},{errorContext,start_error},{reason,{shutdown,{failed_to_start_child,auth,{"Error when reading /Users/josh/.erlang.cookie: eacces",[{auth,init_cookie,0,[{file,"auth.erl"},{line,286}]},{auth,init,1,[{file,"auth.erl"},{line,140}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,374}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}}}},{offender,[{pid,undefined},{id,net_sup},{mfargs,{erl_distribution,start_link,[]}},{restart_type,permanent},{shutdown,infinity},{child_type,supervisor}]}]}
2020-07-24 19:02:53.249031 crash_report #{label=>{proc_lib,crash},report=>[[{initial_call,{application_master,init,['Argument__1','Argument__2','Argument__3','Argument__4']}},{pid,<0.46.0>},{registered_name,[]},{error_info,{exit,{{shutdown,{failed_to_start_child,net_sup,{shutdown,{failed_to_start_child,auth,{"Error when reading /Users/josh/.erlang.cookie: eacces",[{auth,init_cookie,0,[{file,"auth.erl"},{line,286}]},{auth,init,1,[{file,"auth.erl"},{line,140}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,374}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}}}}},{kernel,start,[normal,[]]}},[{application_master,init,4,[{file,"application_master.erl"},{line,138}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}},{ancestors,[<0.45.0>]},{message_queue_len,1},{messages,[{'EXIT',<0.47.0>,normal}]},{links,[<0.45.0>,<0.44.0>]},{dictionary,[]},{trap_exit,true},{status,running},{heap_size,987},{stack_size,27},{reductions,184}],[]]}
2020-07-24 19:02:53.249780 std_info #{label=>{application_controller,exit},report=>[{application,kernel},{exited,{{shutdown,{failed_to_start_child,net_sup,{shutdown,{failed_to_start_child,auth,{"Error when reading /Users/josh/.erlang.cookie: eacces",[{auth,init_cookie,0,[{file,"auth.erl"},{line,286}]},{auth,init,1,[{file,"auth.erl"},{line,140}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,374}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,249}]}]}}}}},{kernel,start,[normal,[]]}}},{type,permanent}]}
{"Kernel pid terminated",application_controller,"{application_start_failure,kernel,{{shutdown,{failed_to_start_child,net_sup,{shutdown,{failed_to_start_child,auth,{\"Error when reading /Users/josh/.erlang.cookie: eacces\",[{auth,init_cookie,0,[{file,\"auth.erl\"},{line,286}]},{auth,init,1,[{file,\"auth.erl\"},{line,140}]},{gen_server,init_it,2,[{file,\"gen_server.erl\"},{line,374}]},{gen_server,init_it,6,[{file,\"gen_server.erl\"},{line,342}]},{proc_lib,init_p_do_apply,3,[{file,\"proc_lib.erl\"},{line,249}]}]}}}}},{kernel,start,[normal,[]]}}}"}
Kernel pid terminated (application_controller) ({application_start_failure,kernel,{{shutdown,{failed_to_start_child,net_sup,{shutdown,{failed_to_start_child,auth,{"Error when reading /Users/josh/.erla
Crash dump is being written to: erl_crash.dump...done
一开始我以为问题可能出在/Users/josh/.erlang.cookie 文件的权限上，但是更改该文件的权限会导致错误，因为显然只有所有者才能拥有该文件的读取权限。
那么，我需要做什么才能使用./factorial 5 运行文件而不必使用sudo ./factorial 5？
【问题讨论】：
-
尝试删除
.erlang.cookie，然后执行脚本sudo rm /Users/josh/.erlang.cookie，然后再执行./factorial 5。 -
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