127 Return code from

Question

What is the meaning of return value 127 from    in UNIX

User · Accepted Answer

Value 127 is returned by  bin sh when the given command is not found within your PATH system variable and it is not a built-in shell command  In other words  the system doesn t understand your command  because it doesn t know where to find the binary you re trying to call

User · Answer

Generally it means   127 - command not found  but it can also mean that the command is found   but a library that is required by the command is NOT found

User · Answer

This error is also at times deceiving  It says file is not found even though the files is indeed present  It could be because of invalid unreadable special characters present in the files that could be caused by the editor you are using  This link might help you in such cases   -bash    my script   bin bash M  bad interpreter  No such file or directory  The best way to find out if it is this issue is to simple place an echo statement in the entire file and verify if the same error is thrown

User · Answer

If you re trying to run a program using a scripting language  you may need to include the full path of the scripting language and the file to execute  For example   exec   usr local bin node  usr local lib node modules uglifycss uglifycss in css  gt  out css

User · Answer

It has no special meaning  other than that the last process to exit did so with an exit status of 127   However  it is also used by bash  assuming you re using bash as a shell  to tell you that the command you tried to execute couldn t be executed  i e  it couldn t be found   It s unfortunately not immediately deducible though  if the process exited with status 127  or if it couldn t found   EDIT  Not immediately deducible  except for the output on the console  but this is stack overflow  so I assume you re doing this in a script

User · Answer

A shell convention is that a successful executable should exit with the value 0  Anything else can be interpreted as a failure of some sort  on part of bash or the executable you that just ran  See also  PIPESTATUS and the EXIT STATUS section of the bash man page       For  the shell   s purposes  a command which exits with a zero exit status has succeeded   An exit status    of zero indicates success   A non-zero exit status indicates failure   When a command terminates  on  a    fatal signal N  bash uses the value of 128 N as the exit status        If  a command is not found  the child process created to execute it returns a status of 127   If a com-    mand is found but is not executable  the return status is 126      If a command fails because of an error during expansion or redirection  the exit status is greater than    zero      Shell  builtin  commands  return  a  status of 0  true  if successful  and non-zero  false  if an error    occurs while they execute   All builtins return an exit status of 2 to indicate incorrect usage      Bash itself returns the exit status of the last command executed  unless  a  syntax  error  occurs   in    which case it exits with a non-zero value   See also the exit builtin command below

User · Answer

127 - command not found  example   caat The error message will   bash       caat  command not found   now you check using echo

User · Answer

If the IBM mainframe JCL has some extra characters or numbers at the end of the name of unix script being called then it can throw such error

[process] 127 Return code from $?

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