look(1) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
LOOK(1)                 NetBSD General Commands Manual                 LOOK(1)

look -- display lines beginning with a given string
look [-df] [-t termchar] string [file]
The look utility displays any lines in file which contain string as a prefix. As look performs a binary search, the lines in file must be sorted. If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic charac- ters is ignored. Options: -d Dictionary character set and order, i.e. only alphanumeric char- acters are compared. -f Ignore the case of alphabetic characters. -t Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of termchar are compared. The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.
/usr/share/dict/words the dictionary
The original manual page stated that tabs and blank characters partici- pated in comparisons when the -d option was specified. This was incor- rect and the current man page matches the historic implementation.
grep(1), sort(1)
look appeared in Version 7 AT&T UNIX. NetBSD 9.3 June 14, 1993 NetBSD 9.3
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