.Dd November 21, 2014 .Dt GREP 1 .Os sbase .Sh NAME .Nm grep .Nd search files for patterns .Sh SYNOPSIS .Nm .Op Fl EFHchilnqsvx .Op Fl e Ar pattern .Op Fl f Ar file .Op Ar pattern .Op Ar file ... .Sh DESCRIPTION .Nm searches the input files for lines that match the .Ar pattern , a regular expression as defined in .Xr regex 7 . By default each matching line is printed to stdout. If no .Ar file is given .Nm reads from stdin. .Sh OPTIONS .Bl -tag -width Ds .It Fl E Match using extended regex. .It Fl F Match using fixed strings. Treat each pattern specified as a string instead of a regular expression. .It Fl H Prefix each matching line with its filename in the output. This is the default when there is more than one file specified. .It Fl c Print only a count of matching lines. .It Fl e Ar pattern Specify a pattern used during the search of the input: an input line is selected if it matches any of the specified patterns. This option is most useful when multiple -e options are used to specify multiple patterns, or when a pattern begins with a dash. .It Fl f Ar file Read one or more patterns from the file named by the pathname file. Patterns in file shall be terminated by a <newline>. A null pattern can be specified by an empty line in pattern_file. Unless the -E or -F option is also specified, each pattern shall be treated as a BRE. (`-'). .It Fl h Do not prefix each line with 'filename:' prefix. .It Fl i Match lines case insensitively. .It Fl l Print only the names of files with matching lines. .It Fl n Prefix each matching line with its line number in the input. .It Fl q Print nothing, only return status. .It Fl s Suppress the error messages ordinarily written for nonexistent or unreadable files. .It Fl v Select lines which do .Sy not match the pattern. .It Fl w The expression is searched for as a word (as if surrounded by '\<' and '\>'). .It Fl x Consider only input lines that use all characters in the line excluding the terminating <newline> to match an entire fixed string or regular expression to be matching lines. .El .Sh EXIT STATUS .Bl -tag -width Ds .It 0 One or more lines were matched. .It 1 No lines were matched. .It > 1 An error occurred. .El .Sh SEE ALSO .Xr sed 1 , .Xr regex 7 .Sh STANDARDS The .Nm utility is compliant with the .St -p1003.1-2008 specification. .Pp The flags .Op Fl Hhw are an extension to that specification.