RC shell

Resources I'm using to learn RC shell

• http://mirtchovski.postnix.pw/lanlp9/scripts
• https://github.com/qwx9/rc.git
• http://doc.cat-v.org/plan_9/4th_edition/papers/rc
• http://plan9.stanleylieber.com/rc/

to sort:

https://shithub.us/henesy/binrc/HEAD/info.html

• http://plan9.stanleylieber.com/rc/
• http://plan9.stanleylieber.com/rc/einstein
• http://plan9.stanleylieber.com/rc/doppler
• http://plan9.stanleylieber.com/rc/backup
• http://plan9.stanleylieber.com/rc/crip
• http://plan9.stanleylieber.com/rc/epub2pdf

• http://plan9.stanleylieber.com/rc/google

• catn: Like cat -n on unix, prints linenumbers before each line

• sfind: very simple version of the unix find command using du

• find: rog@vitanouva.com's find

• find: another version of find

• findgrep: find files which contain a regexp

• lsr: like ls -R using du

• rmdir: like rm -rf uses du

• rmdir: another rmdir

• xargs: version of the unix xargs command by rog@vitanuova.com

https://shithub.us/nikita/rcmisc

• weather uses wttr.in

https://shithub.us/smj/rc

• bunsay: glenda ascii art, says your quote
• surl: does something to URLS

Simple commands

Simple uses rc has syntax familiar to Bourne-shell users. The following behave as expected

date
cat /lib/news/build
who >user.names
who >>user.names
wc <file
echo [a-f]*.c
who | wc
who; date
vc *.c &
mk && v.out /*/bin/fb/*
rm -r junk || echo rm failed!

Quotation

Arguments containing spaces or one of rc's other syntax characters must be enclosed in apostrophes ('):

rm 'odd file name'

An apostrophe in quoted arguments must be doubled

echo 'How''s your father?'

Patterns

An unquoted argument that contains any of the characters * ? [ is a pattern to be matched against file names. A * character matches any sequence of characters, ? matches any single character, and [class] matches any character in the class, unless the first character of class is ~, in which case the class is complemented. The class may also contain pairs of characters separated by -, standing for all characters lexically between the two. The character / must appear explicitly in a pattern, as must the path name components . and ... A pattern is replaced by a list of arguments, one for each path name matched, except that a pattern matching no names is not replaced by the empty list; rather it stands for itself.

Variables

UNIX’s Bourne shell offers string-valued variables. Rc provides variables whose values are lists of arguments — that is, arrays of strings. This is the principal difference between rc and traditional UNIX command interpreters. Variables may be given values by typing, for example:

path=(. /bin)
user=td
font=/lib/font/bit/pelm/ascii.9.font

The parentheses indicate that the value assigned to path is a list of two strings. The variables user and font are assigned lists containing a single string.

The value of a variable can be substituted into a command by preceding its name with a $, like this:

echo $path

If path had been set as above, this would be equivalent to

echo . /bin