Intel XENIX 286 Programmers Guide (86) - Tenox.tc

XENIX Programming Programming Commands
csh (continued)
To select words from an event, we can follow the event specification by a colon (:) and
a designator for the desired words. The words of an input line are nu mbered from 0, the
first (usually command) word being 0, the second word (first argument) being 1, and so
on. The basic word designators are
0 First (command) word
n nth argument
First argument (that is, 1)
$ Last argument
96 Word matched by (immediately preceding) ?s? search
x-y Range of words
-y Abbreviates 0-y
* Abbreviates "-$, or nothing if only one word in event
x* Abbreviates x-$
x- Like x* but omitting word $
The : separating the event specification from the word designator can be omitted if the
argument selector begins with a " , $, *, -, or %. A sequence of modifiers, each
preceded by a colon, can be placed after the optional word designator. The following
modifiers are defined:
h Removes a trailing path name component
r Removes a trailing .xx:x component
s/l/r/ Substitutes l for r
t Removes all leading path name components
c5c Repeats the previous substitution
g Applies the change globally, prefixing the above
p Prints the new command but do not execute it
q Quotes the substituted words, preventing substitutions
X Like q, but breaks into words at blanks, tabs, and newlines
The modification is applied only to the first modifiable word unless preceded by a g. In
any case, it is an error for no word to be applicable.
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