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Diffstat (limited to 'grab.1')
| -rw-r--r-- | grab.1 | 51 |
1 files changed, 50 insertions, 1 deletions
@@ -6,7 +6,7 @@ .Nd search for patterns in files .Sh SYNOPSIS .Nm -.Op Fl z +.Op Fl fnz .Ar pattern .Op Ar .Nm @@ -36,15 +36,43 @@ The special filename can also be provided, which represents the standard input. .Pp +The default behavior of +.Nm +is to print pattern matches to the standard-output. +If more than one file argument is provided, +matches will be prefixed by their respective filename and a colon. +Note that this behavior is modified by the +.Fl f +and +.Fl z +options. +.Pp The options are as follows: .Bl -tag -width Ds +.It Fl f , Fl Fl filenames +Always prefix matches with the names of the files in which the matches +were made, +even if only 1 file was provided. .It Fl h , Fl Fl help Display help information by opening this manual page. +.It Fl n , Fl Fl newline +Don’t match newline characters +.Pq Sq \en +with the dot +.Pq Sq \&. +operator in patterns, +or in negated character-classes. .It Fl z , Fl Fl zero Separate output data by null bytes .Pq Sq \e0 instead of newlines. This option can be used to process matches containing newlines. +.Pp +If combined with the +.Fl f +option, +or if two or more files were provided as arguments, +filenames and matches will be separated by null bytes instead of colons. .El .Ss Pattern Syntax A pattern is a sequences of commands optionally separated by whitespace. @@ -79,6 +107,25 @@ filters out the specific number 1337. As you may use whichever delimiter you like, the following is also valid: .Pp .Dl x|[0-9]+| g.3. v#^1337# +.Sh ENVIRONMENT +.Bl -tag -width GRAB_COLOR_FNAME +.It Ev GRAB_COLOR_FNAME +The color(s) with which to highlight filenames, +or 35 if unset. +.It Ev GRAB_COLOR_SEPC +The color(s) with which to highlight the colon-separator between +filenames and matches, +or 36 if unset. +.It Ev NO_COLOR +Do not display any colored output when set to a non-empty string, +even if the standard-output is a terminal. +.El +.Pp +The +.Ev GRAB_COLOR_* +environment variables are SGR parameters. +For more information regarding SGR parameters see +.Sx SEE ALSO . .Sh EXIT STATUS .Ex -std .Sh EXAMPLES @@ -93,5 +140,7 @@ List all your systems CPU flags, sorted and without duplicates: .%T Structural Regular Expressions .%U https://doc.cat-v.org/bell_labs/structural_regexps/se.pdf .Re +.Pp +.Lk https://en.wikipedia.org/wiki/ANSI_escape_code#SGR "SGR Parameters" .Sh AUTHORS .An Thomas Voss Aq Mt mail@thomasvoss.com |