оболочка, стандартный интерпретатор командного языка (shell, the standard command language interpreter)
Статус выхода (Exit)
The following exit values shall be returned:
0 The script to be executed consisted solely of zero or
more blank lines or comments, or both.
1‐125 A non-interactive shell detected an error other than
command_file not found or executable, including but not
limited to syntax, redirection, or variable assignment
errors.
126 A specified command_file could not be executed due to an
[ENOEXEC] error (see Section 2.9.1.1, Command Search and
Execution, item 2).
127 A specified command_file could not be found by a non-
interactive shell.
Otherwise, the shell shall return the exit status of the last
command it invoked or attempted to invoke (see also the exit
utility in Section 2.14, Special Built-In Utilities).
