FGREP(1)FGREP(1)NAMEfgrep - search a file for a fixed-character string
SYNOPSIS
/usr/bin/fgrep [-bcHhilnqsvx] -e pattern_list [file...]
/usr/bin/fgrep [-bcHhilnqsvx] -f file [file...]
/usr/bin/fgrep [-bcHhilnqsvx] pattern [file...]
/usr/xpg4/bin/fgrep [-bcHhilnqsvx] -e pattern_list [-f file]
[file...]
/usr/xpg4/bin/fgrep [-bcHhilnqsvx] [-e pattern_list] -f file
[file...]
/usr/xpg4/bin/fgrep [-bcHhilnqsvx] pattern [file...]
DESCRIPTION
The fgrep (fast grep) utility searches files for a character string and
prints all lines that contain that string. fgrep is different from
grep(1) and from egrep(1) because it searches for a string, instead of
searching for a pattern that matches an expression. fgrep uses a fast
and compact algorithm.
The characters $, *, [, ^, |, (, ), and \ are interpreted literally by
fgrep, that is, fgrep does not recognize full regular expressions as
does egrep. These characters have special meaning to the shell. There‐
fore, to be safe, enclose the entire string within single quotes (a´).
If no files are specified, fgrep assumes standard input. Normally, each
line that is found is copied to the standard output. The file name is
printed before each line that is found if there is more than one input
file.
OPTIONS
The following options are supported for both /usr/bin/fgrep and
/usr/xpg4/bin/fgrep:
-b
Precedes each line by the block number on which the
line was found. This can be useful in locating block
numbers by context. The first block is 0.
-c
Prints only a count of the lines that contain the
pattern.
-e pattern_list
Searches for a string in pattern-list. This is use‐
ful when the string begins with a −.
-f pattern-file
Takes the list of patterns from pattern-file.
-H
Precedes each line by the name of the file contain‐
ing the matching line.
-h
Suppresses printing of files when searching multiple
files.
-i
Ignores upper/lower case distinction during compar‐
isons.
-l
Prints the names of files with matching lines once,
separated by new-lines. Does not repeat the names
of files when the pattern is found more than once.
-n
Precedes each line by its line number in the file.
The first line is 1.
-q
Quiet. Does not write anything to the standard out‐
put, regardless of matching lines. Exits with zero
status if an input line is selected.
-s
Legacy equivalent of -q.
-v
Prints all lines except those that contain the pat‐
tern.
-x
Prints only lines that are matched entirely.
OPERANDS
The following operands are supported:
file
Specifies a path name of a file to be searched for the pat‐
terns. If no file operands are specified, the standard input
will be used.
/usr/bin/fgrep
pattern
Specifies a pattern to be used during the search for input.
/usr/xpg4/bin/fgrep
pattern
Specifies one or more patterns to be used during the search
for input. This operand is treated as if it were specified
as -e pattern_list.
USAGE
See largefile(5) for the description of the behavior of fgrep when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables
that affect the execution of fgrep: LC_COLLATE, LC_CTYPE, LC_MESSAGES,
and NLSPATH.
EXIT STATUS
The following exit values are returned:
0
If any matches are found
1
If no matches are found
2
For syntax errors or inaccessible files, even if matches were
found.
/usr/xpg4/bin/fgrep
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌───────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────┼─────────────────┤
│CSI │ Enabled │
└───────────────┴─────────────────┘
SEE ALSOed(1), egrep(1), grep(1), sed(1), sh(1), attributes(5), environ(5),
largefile(5), XPG4(5)NOTES
Ideally, there should be only one grep command, but there is not a sin‐
gle algorithm that spans a wide enough range of space-time tradeoffs.
Lines are limited only by the size of the available virtual memory.
/usr/xpg4/bin/fgrep
The /usr/xpg4/bin/fgrep utility is identical to /usr/xpg4/bin/grep -F
(see grep(1)). Portable applications should use /usr/xpg4/bin/grep -F.
May 3, 2013 FGREP(1)
