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bm(1) [bsd man page]

BM(PUBLIC)																BM(PUBLIC)

NAME
bm - search a file for a string SYNOPSIS
/usr/public/bm [ option ] ... [ strings ] [ file ] DESCRIPTION
Bm searches the input files (standard input default) for lines matching a string. Normally, each line found is copied to the standard out- put. It is blindingly fast. Bm strings are fixed sequences of characters: there are no wildcards, repetitions, or other features of regu- lar expressions. Bm is also case sensitive. The following options are recognized. -x (Exact) only lines matched in their entirety are printed -l The names of files with matching lines are listed (once) separated by newlines. -c Only a count of the number of matches is printed -e string The string is the next argument after the -e flag. This allows strings beginning with '-'. -h No filenames are printed, even if multiple files are searched. -n Each line is preceded by the number of characters from the beginning of the file to the match. -s Silent mode. Nothing is printed (except error messages). This is useful for checking the error status. -f file The string list is taken from the file. Unless the -h option is specified the file name is shown if there is more than one input file. Care should be taken when using the charac- ters $ * [ ^ | ( ) and in the strings (listed on the command line) as they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '. Bm searches for lines that contain one of the (newline-separated) strings, using the Boyer-Moore algorithm. It is far superior in terms of speed to the grep (egrep, fgrep) family of pattern matchers for fixed-pattern searching, and its speed increases with pattern length. SEE ALSO
grep(1) DIAGNOSTICS
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files. AUTHOR
Peter Bain (pdbain@wateng), with modifications suggested by John Gilmore BUGS
Only 100 patterns are allowed. Patterns may not contain newlines. If a line (delimited by newlines, and the beginning and end of the file) is longer than 8000 charcters (e.g. in a core dump), it will not be completely printed. If multiple patterns are specified, the order of the ouput lines is not necessarily the same as the order of the input lines. A line will be printed once for each different string on that line. The algorithm cannot count lines. The -n and -c work differently from fgrep. The -v, -i, and -b are not available. 4th Berkeley Distribution 8 July 1985 BM(PUBLIC)

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grep(1) 						      General Commands Manual							   grep(1)

Name
       grep, egrep, fgrep - search file for regular expression

Syntax
       grep [option...] expression [file...]

       egrep [option...] [expression] [file...]

       fgrep [option...] [strings] [file]

Description
       Commands  of  the family search the input files (standard input default) for lines matching a pattern.  Normally, each line found is copied
       to the standard output.

       The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm.  The command patterns
       are  full  regular  expressions.  The command uses a fast deterministic algorithm that sometimes needs exponential space.  The command pat-
       terns are fixed strings.  The command is fast and compact.

       In all cases the file name is shown if there is more than one input file.  Take care when using the characters $ * [ ^ | ( ) and   in  the
       expression because they are also meaningful to the Shell.  It is safest to enclose the entire expression argument in single quotes ' '.

       The command searches for lines that contain one of the (new line-separated) strings.

       The command accepts extended regular expressions.  In the following description `character' excludes new line:

	      A  followed by a single character other than new line matches that character.

	      The character ^ matches the beginning of a line.

	      The character $ matches the end of a line.

	      A .  (dot) matches any character.

	      A single character not otherwise endowed with special meaning matches that character.

	      A  string  enclosed in brackets [] matches any single character from the string.	Ranges of ASCII character codes may be abbreviated
	      as in `a-z0-9'.  A ] may occur only as the first character of the string.  A literal - must be placed where it can't be mistaken	as
	      a range indicator.

	      A  regular  expression  followed	by  an	* (asterisk) matches a sequence of 0 or more matches of the regular expression.  A regular
	      expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression.  A regular expression  followed
	      by a ? (question mark) matches a sequence of 0 or 1 matches of the regular expression.

	      Two regular expressions concatenated match a match of the first followed by a match of the second.

	      Two regular expressions separated by | or new line match either a match for the first or a match for the second.

	      A regular expression enclosed in parentheses matches a match for the regular expression.

       The  order  of  precedence  of  operators at the same parenthesis level is the following:  [], then *+?, then concatenation, then | and new
       line.

Options
       -b	   Precedes each output line with its block number.  This is sometimes useful in locating disk block numbers by context.

       -c	   Produces count of matching lines only.

       -e expression
		   Uses next argument as expression that begins with a minus (-).

       -f file	   Takes regular expression (egrep) or string list (fgrep) from file.

       -i	   Considers upper and lowercase letter identical in making comparisons and only).

       -l	   Lists files with matching lines only once, separated by a new line.

       -n	   Precedes each matching line with its line number.

       -s	   Silent mode and nothing is printed (except error messages).	This is useful for checking the error status (see DIAGNOSTICS).

       -v	   Displays all lines that do not match specified expression.

       -w	   Searches for an expression as for a word (as if surrounded by `<' and `>').  For further information, see only.

       -x	   Prints exact lines matched in their entirety only).

Restrictions
       Lines are limited to 256 characters; longer lines are truncated.

Diagnostics
       Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.

See Also
       ex(1), sed(1), sh(1)

																	   grep(1)

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