plan9-look(1) [debian man page]

LOOK(1) 						      General Commands Manual							   LOOK(1)

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

       /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.

																	   LOOK(1)

look(1) 						      General Commands Manual							   look(1)

NAME

       look - Finds lines in a sorted list

SYNOPSIS

       look [-df] [-tcharacter] string [file]

       The look command prints all lines in a sorted file that begin with string.

OPTIONS

       Uses  dictionary  order; only letters, digits, tabs, and spaces are used in comparisons.  Searches without regard to case; treats uppercase
       and lowercase as equivalent.  Ignores character and characters following it in the search string.  If  you  specify  look  -tC  ABCDE,  the
       string  ABCDE  would  become  (in  effect)  AB, with CDE being ignored.	This option is primarily for shell scripts, in which more than one
       string is being processed.

DESCRIPTION

       If no file is specified, look searches in the system word list /usr/share/dict/words, with the options -df assumed by default.

       The look command uses binary search.

       The -d and -f options affect comparisons as in sort.

NOTES

       In order to use the -f option, you must first sort file with the sort -f command; otherwise, look displays only lowercase items.

       If you do not specify -f, but specify a file (such as /usr/share/dict/words) that has been sorted with sort -f, look may  not  produce  any
       output.

EXAMPLES

       To search a sorted file called sortfile for all lines that begin with the string as, enter: look as sortfile To search the system word list
       for all words beginning with smi, enter: look smi

	      This might result in: smile smirk smith smithereens Smithfield Smithson smithy smitten

FILES

       System word list.

SEE ALSO

       Commands:  grep(1), sort(1), spell(1)

																	   look(1)