NAME

	look – find lines in a sorted list

SYNOPSIS

	look [ −dfnixtc ] [ string ] [ file ]

DESCRIPTION

Look consults a sorted file and prints all lines that begin with string. It uses binary search. The following options are recognized. Options dfnt affect comparisons as in sort(1). −i    Interactive. There is no string argument; instead look takes lines from the standard input as strings to be looked up. −x    Exact. Print only lines of the file whose key matches string exactly. −d    ‘Directory’ order: only letters, digits, tabs and blanks participate in comparisons. −f    Fold. Upper case letters compare equal to lower case. −n    Numeric comparison with initial string of digits, optional minus sign, and optional decimal point. −t[c]   Character c terminates the sort key in the file. By default, tab terminates the key. If c is missing the entire line comprises the key. If no file is specified, /lib/words is assumed, with collating sequence df.

FILES

	/lib/words

SOURCE

	/usr/local/plan9/src/cmd/look.c

SEE ALSO

	sort(1), grep(1)

DIAGNOSTICS

	The exit status is “not found” if no match is found, and “no dictionary” if file or the default dictionary cannot be opened.