STRFILE(8) | System Manager's Manual | STRFILE(8) |
strfile
, unstr
—
strfile |
[-iorsx ] [-c
char] source_file
[output_file] |
unstr |
source_file |
strfile
reads a file containing groups of lines
separated by a line containing a single percent
‘%
’ sign and creates a data file which
contains a header structure and a table of file offsets for each group of
lines. This allows random access of the strings.
The output file, if not specified on the command line, is named source_file.dat.
The options are as follows:
-c
char-i
-o
STR_ORDERED
bit in the header
str_flags field to be set.-r
STR_RANDOM
bit in the header
str_flags field to be set.-s
-x
STR_ROTATED
bit in the header
str_flags field to be set.The format of the header is:
#define VERSION 1 unsigned long str_version; /* version number */ unsigned long str_numstr; /* # of strings in the file */ unsigned long str_longlen; /* length of longest string */ unsigned long str_shortlen; /* length of shortest string */ #define STR_RANDOM 0x1 /* randomized pointers */ #define STR_ORDERED 0x2 /* ordered pointers */ #define STR_ROTATED 0x4 /* rot-13'd text */ unsigned long str_flags; /* bit field for flags */ char str_delim; /* delimiting character */
All fields are written in big-endian byte order.
The purpose of unstr
is to undo the work
of strfile
. It prints out the strings contained in
the file source_file in the order that they are listed
in the header file source_file.dat
to standard output. It is possible to create sorted versions of input files
by using -o
when strfile
is
run and then using unstr
to dump them out in the
table order.
strfile
utility first appeared in
4.4BSD.
January 17, 2010 | NetBSD 9.2 |