Korn Shell: Unix and Linux Programming Manual, Third Edition, The

Shell Startup

The following options can be specified only on the command line:

-c command-string	the shell executes the command(s) contained in command-string
-i	interactive mode - see below
-l login shell	see below interactive mode
-s	the shell reads commands from standard input; all non-option arguments are positional parameters
-r	restricted mode - see below

In addition to the above, the options described in the set builtin command can also be used on the command line.

If neither the -c nor the -s options are specified, the first non-option argument specifies the name of a file the shell reads commands from; if there are no non-option arguments, the shell reads commands from standard input. The name of the shell (i.e., the contents of the ...