Copyright (C) 2000-2012 |
GNU Info (autotype)ExecutablesMaking Interpreter Scripts Executable ************************************* Various interpreter modes such as Shell script mode or AWK mode will automatically insert or update the buffer's magic number, a special comment on the first line that makes the `exec' systemcall know how to execute the script. To this end the script is automatically made executable upon saving, with `executable-chmod' as argument to the system `chmod' command. The magic number is prefixed by the value of `executable-prefix'. Any file whose name matches `executable-magicless-file-regexp' is not furnished with a magic number, nor is it made executable. This is mainly intended for resource files, which are only meant to be read in. The variable `executable-insert' says what to do when `executable-set-magic' is called non-interactively, e.g. when file has no or the wrong magic number: `nil' Do nothing. `t' Insert or update magic number. other Insert or update magic number, but mark as unmodified. The variable `executable-query' controls whether to ask about inserting or updating the magic number. When this is `nil' updating is only done with `M-x executable-set-magic'. When this is `function' you are queried whenever `executable-set-magic' is called as a function, such as when Emacs puts a buffer in Shell script mode. Otherwise you are alway queried. `M-x executable-self-display' adds a magic number to the buffer, which will turn it into a self displaying text file, when called as a Un*x command. The "interpreter" used is `executable-self-display' with argument `+2'. automatically generated by info2www version 1.2.2.9 |