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LOOK(1) FreeBSD General Commands Manual LOOK(1) NAME look -- display lines beginning with a given string SYNOPSIS look [-df] [-t termchar] string [file ...] DESCRIPTION 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. The following options are available: -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. ENVIRONMENT The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of the look utility. Their effect is described in environ(7). FILES /usr/share/dict/words the dictionary DIAGNOSTICS 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. COMPATIBILITY 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. SEE ALSO grep(1), sort(1) HISTORY A look utility appeared in Version 7 AT&T UNIX. BUGS Lines are not compared according to the current locale's collating order. Input files must be sorted with LC_COLLATE set to `C'. FreeBSD 11.1 July 17, 2004 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | FILES | DIAGNOSTICS | COMPATIBILITY | SEE ALSO | HISTORY | BUGS
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