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LOOK(1) BSD General Commands Manual LOOK(1)
NAME
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look − display lines beginning with a given string |
SYNOPSIS
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look [−dfa] [−t termchar] string [file] |
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DESCRIPTION |
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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 (where sort(1) got the same options −d and/or −f that look is invoked with). If file is not specified, the file /usr/dict/words is used, only alphanumeric characters are compared and the case of alphabetic characters is ignored. Options: |
−d’ Dictionary character set and order, i.e. only alphanumericcharacters are compared.
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−f’ Ignore the case of alphabetic characters. −a’ Use the alternate dictionary /usr/dict/web2 −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. FILES |
/usr/dict/words
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the dictionary SEE ALSO |
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grep(1), sort(1) |
COMPATIBILITY
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The original manual page stated that tabs and blank characters participated in comparisons when the −d option was specified. This was incorrect and the current man page matches the historic implementation. |
HISTORY
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Look appeared in Version 7 AT&T Unix. BSD June 14, 1993 BSD |