manages one-time passwords
program performs binary searches
which must be a sorted flat text
Each line is a record. Each record starts with a key that is optionally followed
by whitespace and a value. Whitespace may be quoted with a backslash, but
newline and carriage-return characters must be quoted in some other manner
(e.g., as backslash-n and backslash-r). Escapes are not interpreted nor
If no key arguments are given on the comman-line, then keys will be read from
By default only values are printed to standard output. Use the -K option to also
print keys. The exit status will be non-zero if any key lookups fail.
- Print keys.
- Don't print values.
- Print usage and exit.
- Print statistic and debug information to standard error.
file A sorted flat text file. NOTE: use
the "C" locale for sorting this file, as in "LC_ALL=C sort
-u -o file file".
- For getting a help message.
- Set max-cache-size as the maximum cache
size. If the file is smaller than this
size then the whole file will be read into memory, else the program will
read blocks. Defaults to 1MB.
- Set block-size as the block size for
block-wise I/O. This must be a power of 2, must be no smaller than 512 and
no larger than 1MB. Defaults to the
file's filesystem's preferred
$ env LC_ALL=C sort -o /tmp/words /usr/share/dict/words
$ bsearch -Kv /tmp/words day
Using whole-file method
Key day found at offset 327695 in 12 loops and 0 reads
Records must not be longer than one block's size.
Flat text files must be sorted in the "C" locale. In some systems the
default locale may result in case-insensitive sorting by the sort command.