Manual Reference Pages - FTWHICH (1)
ftwhich - fault tolerant search for a command name
ftwhich [-#hIp][-t#] program_name
ftwhich is a fault tolerant version of the which(1) command.
ftwhich searches for a given program in all directories included in your
PATH environment variable and reports all files with a name that approximately
matches the given
ftwhich achieves fault tolerance by calculating the so called
Weighted Levenshtein Distance. The Levenshtein Distance
is defined as the minimum number of character insertions,
deletions and replacements that transform
A into a string
ftwhich is similar to the
which command with the following differences:
ftwhich is by default NOT case sensitive
ftwhich is fault tolerant
Some shells have a build in
which command that will also search aliases.
ftwhich can naturaly not search for aliases as it does not know
about alias definitions.
ftwhich lists all files that approximatly match. The files first
shown take preference over files of the same name printed later as
they are from directories listed earlier in the PATH.
The level of fault tolerance can be adjusted by specifying the optional parameter
tolerance of 0 specifies exact match.
The last argument to ftwhich is not parsed for options as the program needs
at least one program_name argument. This means that
ftwhich -x will not complain about a wrong option but search for the program named -x.
Prints help/usage information.
Do case sensitive search (default is case in-sensitive)
print the actual distance value in front of the found filename. This value
is equal to the number of insertions, deletions and replacements necessary
to transform the name of the found program into the search key.
-# or -t# ||
Set the fault tolerance level to #.
The fault tolerance level is an integer in the range 0-255.
It specifies the maximum number of errors permitted in finding
the approximate match. The default tolerance is (strlen(searchpattern) - number of wildcards)/6 + 1
The program file to search for.
? can be used as wildcards.
? denotes one single character.
* denotes an arbitrary number of characters.
Search for all programs like gcc in your PATH:
This will e.g. find gcc or cc or CC ...
To find all files that start with any prefix and end in
config and differ in 2 letters from the word
To find all files that exactly start with the prefix
To find all clock programs:
ftwhich -0 *clock*
* can not be escaped. These characters function always as
wildcards. This is however not a big problem since there is
normally hardly any command that has these characters in its name.
Guido Socher (email@example.com)
|Search utilities ||FTWHICH (15) ||January 1999 |
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