04-24-2008
Count of matched pattern occurance
In a file a pattern is occured many times randomly. Even it may appear more then once in the same line too. How i can get the number of times that pattern appeared in the file? let the file name is abc.txt and the pattern is "xyz".
I used the following code:
grep -ic "xyz" abc.txt
but it is not perfectly showing the result. if the pattern is repeated in a line two or more times it consider only once. so this code actually shows number of lines where pattern is found but not showing how many times in the entire file the pattern appeared? Shall i need a script for it? how can i overcome this situation?
Can anybody help me please?
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fnmatch(3C) fnmatch(3C)
NAME
fnmatch() - match filename patterns
SYNOPSIS
DESCRIPTION
performs pattern matching as described in regexp(5) under By default, the rule qualifications for filename expansion do not apply; i.e.,
periods (dots) and slashes are matched as ordinary characters. This default behavior can be modified by using the flags described below.
The flag argument modifies the interpretation of pattern and string. If which is defined in is set in flag, a slash character in string
must be explicitly matched by a slash in pattern; it cannot be matched by either the asterisk or question mark special characters or by a
bracket expression.
If is set in flag, a leading period must be explicitly matched. It will not be matched by a bracket expression, question mark or asterisk.
By default, a period is leading if it is the first character in string. If is set in flag, a period is leading if it is the first charac-
ter in string or immediately follows a slash.
If is not set in flag, a backslash character in pattern followed by any other character matches that second character in string. In par-
ticular, matches a backslash in string. If is set, a backslash character is treated as an ordinary character.
If flag is zero, the slash character and the period are treated as regular characters. If flag has any other value, the result is unde-
fined.
RETURN VALUE
If string matches the pattern specified by pattern, returns zero. Otherwise, returns non-zero.
EXAMPLE
The following excerpt uses to check each file in a directory against the pattern
pattern = "*.c";
while(dp = readdir(dirp)){
if((fnmatch(pattern, dp->d_name,0)) == 0){
/* do processing for match */
...
}
}
AUTHOR
was developed by OSF and HP.
SEE ALSO
sh(1), glob(3C), thread_safety(5).
STANDARDS CONFORMANCE
fnmatch(3C)