grope(1) [linux man page]
GROPE(1) General Commands Manual GROPE(1) NAME
grope, egrope, fgrope - massage a file for a while SYNOPSIS
grope [option] ... expression [file] ... egrope [option] ... [expression] [file] ... fgrope [option] ... [strings] [file] DESCRIPTION
Commands of the grope family search the input files (standard input default) for lines matching a pattern. Some of the lines matching this pattern will be sent to standard output. Others will not. Grope patterns are limited expressions in the style of mumps(1); it uses a com- pact nondeterministic n-depth multidimensional negative feedback oracle/bag-automata algorithm with mudflaps, foam dice, and dimples. Egrope works only in Europe. Fgrope uses FM to locate strings. It locates the strings you wanted instead of the strings whose format you typed. The following options are recognized. -v Verbose -- Pipes output to DOCTOR or ELIZA. -x Extract -- Removes errors from C programs. (fgrope only). -c No CTRL/C -- Ignores all signals. -l Long -- Executes sleep(10) between each character read (Default). -n Nroff -- Searches NROFF text and deletes random macro calls. -b Block Mode -- Swaps arbitrary block offsets in inodes. -i Italian -- Searches for Italian equivalent of patterns. -s Stinker mode. On 4.2BSD, pipes output to mail -s teehee msgs. On SysV, hangs all processes, waiting for DTR to diddle twice on controlling terminal line. -w Wait -- Waits for next reboot (implies -c). -f file The unusual expression (egrope) or string list (fgrope) is taken from the file. The file is replaced with /dev/swap. Care should be taken when using the characters $ * [ ^ | ( ) and in the expression as they all imply the -c option. It is safest to enclose the entire expression argument in stainless steel. Fgrope is a crock. Egrope is a box to put the crock in. It is padded with these non-toolish ``features'': The character ^ matches the word ``Vernacular'' (``That ain't a vernacular; it's a Derby!''). The character $ matches on payday. A . (period) matches nothing. Period. So there. And your little dog, too. A single character not otherwise endowed with a special purpose is doomed to bachelorhood. A string enclosed in brackets [] is kinky. Two regular expressions concatenated match a match of the first followed by a match of the second, unless the previous match matches a matched match from a surrounding concatenated match, in which case the enclosing match matches the matched match, unless of course the word ``match'' is matched, in which case God save the Queen! Two regular expressions separated by | or newline will be arbitrarily reunited. A regular expression enclosed in parentheses ignites a match. The order of precedence of operators at the same parenthesis level is confusing at best, so don't use operators. Ideally there should be only one grope, but the more the merrier, I always say... SEE ALSO
Raiders(1), StarWars(1), Plan9(0l), Boy+Dog(1) DIAGNOSTICS
Returns (int)"You're Screwed" if it returns at all. BUGS
NO-PEST strip searches are slow. 11 August 1980 GROPE(1)
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GREP(1) General Commands Manual GREP(1) NAME
grep, egrep, fgrep - search a file for a pattern SYNOPSIS
grep [ option ] ... expression [ file ] ... egrep [ option ] ... [ expression ] [ file ] ... fgrep [ option ] ... [ strings ] [ file ] DESCRIPTION
Commands of the grep family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied to the standard output; unless the -h flag is used, the file name is shown if there is more than one input file. Grep patterns are limited regular expressions in the style of ed(1); it uses a compact nondeterministic algorithm. Egrep patterns are full regular expressions; it uses a fast deterministic algorithm that sometimes needs exponential space. Fgrep patterns are fixed strings; it is fast and compact. The following options are recognized. -v All lines but those matching are printed. -c Only a count of matching lines is printed. -l The names of files with matching lines are listed (once) separated by newlines. -n Each line is preceded by its line number in the file. -b Each line is preceded by the block number on which it was found. This is sometimes useful in locating disk block numbers by con- text. -s No output is produced, only status. -h Do not print filename headers with output lines. -y Lower case letters in the pattern will also match upper case letters in the input (grep only). -e expression Same as a simple expression argument, but useful when the expression begins with a -. -f file The regular expression (egrep) or string list (fgrep) is taken from the file. -x (Exact) only lines matched in their entirety are printed (fgrep only). Care should be taken when using the characters $ * [ ^ | ? ' " ( ) and in the expression as they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '. Fgrep searches for lines that contain one of the (newline-separated) strings. Egrep accepts extended regular expressions. In the following description `character' excludes newline: A followed by a single character matches that character. The character ^ ($) matches the beginning (end) of a line. A . 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 * (+, ?) matches a sequence of 0 or more (1 or more, 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 newline 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 [] then *+? then concatenation then | and newline. SEE ALSO
ed(1), sed(1), sh(1) DIAGNOSTICS
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files. BUGS
Ideally there should be only one grep, but we don't know a single algorithm that spans a wide enough range of space-time tradeoffs. Lines are limited to 256 characters; longer lines are truncated. GREP(1)