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User Commands egrep(1)
NAME
egrep - search a file for a pattern using full regular
expressions
SYNOPSIS
/usr/bin/egrep [-bchilnsv] -e pattern_list [file...]
/usr/bin/egrep [-bchilnsv] -f file [file...]
/usr/bin/egrep [-bchilnsv] pattern [file...]
/usr/xpg4/bin/egrep [-bchilnqsvx] -e pattern_list [-f file]
[file...]
/usr/xpg4/bin/egrep [-bchilnqsvx] [-e pattern_list] -f file
[file...]
/usr/xpg4/bin/egrep [-bchilnqsvx] pattern [file...]
DESCRIPTION
The egrep (expression grep) utility searches files for a
pattern of characters and prints all lines that contain that
pattern. egrep uses full regular expressions (expressions
that have string values that use the full set of
alphanumeric and special characters) to match the patterns.
It uses a fast deterministic algorithm that sometimes needs
exponential space.
If no files are specified, egrep assumes standard input.
Normally, each line found is copied to the standard output.
The file name is printed before each line found if there is
more than one input file.
/usr/bin/egrep
The /usr/bin/egrep utility accepts full regular expressions
as described on the regexp(5) manual page, except for \( and
\), \( and \), \{ and \}, \< and \>, and \n, and with the
addition of:
1. A full regular expression followed by + that matches one
or more occurrences of the full regular expression.
2. A full regular expression followed by ? that matches 0
or 1 occurrences of the full regular expression.
3. Full regular expressions separated by | or by a NEWLINE
that match strings that are matched by any of the
expressions.
SunOS 5.10 Last change: 24 Mar 2006 1
User Commands egrep(1)
4. A full regular expression that can be enclosed in
parentheses ()for grouping.
Be careful using the characters $, *, [, ^, |, (, ), and \
in full regular expression, because they are also meaningful
to the shell. It is safest to enclose the entire full regu-
lar expression in single quotes ('').
The order of precedence of operators is [], then *?+, then
concatenation, then | and NEWLINE.
/usr/xpg4/bin/egrep
The /usr/xpg4/bin/egrep utility uses the regular expressions
described in the EXTENDED REGULAR EXPRESSIONS section of the
regex(5) manual page.
OPTIONS
The following options are supported for both /usr/bin/egrep
and /usr/xpg4/bin/egrep:
-b Precede each line by the block number on
which it was found. This can be useful in
locating block numbers by context (first
block is 0).
-c Print only a count of the lines that contain
the pattern.
-e pattern_list Search for a pattern_list (full regular
expression that begins with a -).
-f file Take the list of full regular expressions
from file.
-h Suppress printing of filenames when search-
ing multiple files.
-i Ignore upper/lower case distinction during
comparisons.
SunOS 5.10 Last change: 24 Mar 2006 2
User Commands egrep(1)
-l Print the names of files with matching lines
once, separated by NEWLINEs. Does not repeat
the names of files when the pattern is found
more than once.
-n Precede each line by its line number in the
file (first line is 1).
-s Work silently, that is, display nothing
except error messages. This is useful for
checking the error status.
-v Print all lines except those that contain
the pattern.
/usr/xpg4/bin/egrep
The following options are supported for /usr/xpg4/bin/egrep
only:
-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.
-x Consider only input lines that use all characters
in the line to match an entire fixed string or reg-
ular expression to be matching lines.
OPERANDS
The following operands are supported:
file A path name of a file to be searched for the
patterns. If no file operands are specified,
the standard input is used.
/usr/bin/egrep
pattern Specify a pattern to be used during the
search for input.
SunOS 5.10 Last change: 24 Mar 2006 3
User Commands egrep(1)
/usr/xpg4/bin/egrep
pattern Specify one or more patterns to be used dur-
ing the search for input. This operand is
treated as if it were specified as
-epattern_list..
USAGE
See largefile(5) for the description of the behavior of
egrep 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 egrep: 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).
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
/usr/bin/egrep
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
| CSI | Not Enabled |
|_____________________________|_____________________________|
/usr/xpg4/bin/egrep
SunOS 5.10 Last change: 24 Mar 2006 4
User Commands egrep(1)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWxcu4 |
|_____________________________|_____________________________|
| CSI | Enabled |
|_____________________________|_____________________________|
SEE ALSO
fgrep(1), grep(1), sed(1), sh(1), attributes(5), environ(5),
largefile(5), regex(5), regexp(5), XPG4(5)
NOTES
Ideally there should be only one grep command, but there is
not a single 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/egrep
The /usr/xpg4/bin/egrep utility is identical to
/usr/xpg4/bin/grep -E (see grep(1)). Portable applications
should use /usr/xpg4/bin/grep-E.
SunOS 5.10 Last change: 24 Mar 2006 5
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This page was generated on Wed Sep 12 11:24:36 GMT 2007
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