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-
- YASO (yet another shell [something]) Manual, By Matthew Dillon
-
- Terms: You may not charge money or any form of service for use of
- this program. This program is public domain, and may be
- distributed freely as long as The author's name (and your
- name if you've hacked it majorly) and this message remains.
-
- Startup: sys:.login will be sourced by this program. Usually, you
- put general aliases there.
-
-
- The basic form of a command is:
-
- Command arg1 arg2.... argN
-
- * if the command is exactly a built in command, that built in
- command is run.
- * if the command is an alias, the alias is expanded
- * if the command is a partial of a built in command, that built in
- command is run.
- * otherwise, the command is Execute()'d
-
- The line scanner will do various substitutions before passing the line to
- the command:
-
- Any set variables of the form $name is expanded to it's contents
- % set abc hello
- % echo $abc
- hello
-
- Any file-path with wildcards (example: *.c), is expanded (a.c b.c ..)
- % echo *.c
- execom.c a.c x.c
-
- Within quotes, ^c is expanded to it's control character
- % echo "^l"
- < the screen is cleared >
-
- You may do history substitution of the form:
- % !! -previous command
- % !partial -search history for command
- % !num -a specific history #
-
- In most cases, you may use \ to overide a special character (there are
- some bugs with this one)
- % echo \*
- *
-
- INTERNAL COMMANDS
-
- quit -quit, done, vamoos
- set name arg1 arg23.... -set a variable ($substitution)
- unset name1 name2 ... -unset variables
- alias name "command;command..." -whatever you want to alias
- unalias name1 name2 ... -unalias aliases
- echo [-n] arg1 arg2... -echo args to screen
- source file -use a command file as input
- mv file1 file2 -rename a file (rename only)
- cd directory -cd to a directory
- rm file1 file2... -rm files
- mkdir dirname dirname... -make directories
- history -show history list
- mem -show memory statistics
- cat file1 file2... -simple file dump to screen
- dir dir/file dir/file.. -get directory
- devinfo [device] -get device info
- foreach var ( arg arg arg ) command -(see below)
-
- VARIABLES:
-
- Two variables are reserved currently:
-
- _history -# lines to remember
- _prompt -command which causes your
- prompt.
-
-
- SPECIFICS/SPECIAL COMMANDS:
-
- echo [-n] arg ...
- The -n option causes a newline NOT to be printed
-
- foreach example: (assume the files a.c b.c c.c and d.c are in the curr. dir)
- % foreach i ( *.c ) "echo -n hello;echo $i"
- hello a.c
- hello b.c
- hello c.c
- hello d.c
- %
-
- REDIRECTION:
-
- You may redirect only external commands (sorry). Currently, the
- file name MUST BE NEXT TO THE '>' or '<' '>charlie'. However, the
- redirection args can be anywhere on the argument line. The default
- redirection is to '*'.
-
-
-
- BUGS:
- An OS bug in Execute()... 30+ bytes are lost every time an external
- command is executed.
-