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BSEARCH(1) BSD General Commands Manual BSEARCH(1) NAME bsearch -- manages one-time passwords SYNOPSIS bsearch [-KVvh] [-b block-size] [-m max-cache-size] file [key ...] DESCRIPTION The bsearch program performs binary searches of file which must be a sorted flat text file. 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 removed. If no key arguments are given on the comman-line, then keys will be read from standard input. 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. Options are: -K Print keys. -V Don't print values. -h Print usage and exit. -v 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". -h For getting a help message. -m 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 mem- ory, else the program will read blocks. Defaults to 1MB. -b 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 blocksize. EXAMPLES $ 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 day $ NOTES 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 com- mand. SEE ALSO sort(1) KTH-KRB November 30, 2011 KTH-KRB
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | NOTES | SEE ALSO
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