# strfile(1) - man - phpMan [STRFILE(1)](https://www.chedong.com/phpMan.php/man/STRFILE/1/markdown) UNIX System Manager's Manual [STRFILE(1)](https://www.chedong.com/phpMan.php/man/STRFILE/1/markdown) ## NAME strfile - create a random access file for storing strings unstr - dump strings in pointer order ## SYNOPSIS **strfile** [**-iorsx**] [**-c** _char_] _sourcefile_ [_outputfile_] **unstr** [**-c** _char_] _datafile_[_.ext_] [_outputfile_] ## DESCRIPTION **strfile** reads a file containing groups of lines separated by a line containing a single per‐ cent `%' sign (or other specified delimiter character) 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 _sourcefile.dat_. The purpose of **unstr** is to undo the work of **strfile**. It prints out the strings contained in the sourcefile, which is _datafile.ext_ without its extension, or _datafile_ if no extension is specified (in this case, the extension _.dat_ is added to the name of the datafile) in the or‐ der that they are listed in the header file _datafile_. If no _outputfile_ is specified, it prints to standard output; otherwise it prints to the file specified. **unstr** can also univer‐ sally change the delimiter character in a strings file. It is possible to create sorted ver‐ sions of input files by using **strfile** **-o** and then using **unstr** to dump them out in the table order. ### Options The options are as follows: ### -c Change the delimiting character from the percent sign to _char_. This option is avail‐ able for both **strfile** and **unstr**. ### -i ### -o phabetical order of the groups of lines referenced. Any initial non-alphanumeric characters are ignored. This option causes the STR_ORDERED bit in the header _str_flags_ field to be set. (It also now really does sort! It didn't used to). ### -r dered. This option causes the STR_RANDOM bit in the header _str_flags_ field to be set. (And really does randomize) ### -s ### -x a simple caesar cypher. This option causes the STR_ROTATED bit in the header _str_flags_ field to be set. Note that it **does** **not** rotate the strings--that operation must be performed separately. ### Header 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; /* shortest string length */ #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 network byte order. ## BUGS Fewer now, one hopes. However, fortunes (text strings) beginning with a blank line appear to be sorted between random letters. This includes ASCII art that contains no letters, and first lines that are solely non-alphanumeric, apparently. I've no idea why this should be. ## OTHER USES What can you do with this besides printing sarcastic and obscene messages to the screens of lusers at login or logout? There **are** some other possibilities. Source code for a sample program, **randstr**, is included with this distribution: randstr splits the difference between **unstr** and **fortune**. It reads a single, specified file, and randomly selects a single text string. 1 Include _strfile.h_ into a news reading/posting program, to generate random signatures. [**Tin**(1)](https://www.chedong.com/phpMan.php/man/Tin/1/markdown) does something similar, in a much more complex manner. 2 Include it in a game. While strfile doesn't support 'fields' or 'records', there's no reason that the text strings can't be consistent: first line, a die roll; second line, a score; third and subsequent lines, a text message. 3 Use it to store your address book. Hell, some of the guys I know would be as well off using it to decide who to call on Friday nights (and for some, it wouldn't matter whether there were phone numbers in it or not). 4 Use it in 'lottery' situations. If you're an ISP, write a script to store login names and GECOS from _/etc/passwd_ in strfile format, write another to send 'congratulations, you've won' to the lucky login selected. The prize might be a month's free service, or if you're AOL, a month free on a real service provider. ## SEE ALSO [**byteorder**(3)](https://www.chedong.com/phpMan.php/man/byteorder/3/markdown), [**fortune**(6)](https://www.chedong.com/phpMan.php/man/fortune/6/markdown) ## HISTORY The **strfile** utility first appeared in 4.4BSD. This version was heavily modified, much of it in ways peculiar to Linux. Work has since been done to make the code more generic, and has so far been tested to work with SunOS 4.x. More platforms are expected to be supported as work continues. 4th Berkeley Distribution June 9, 1993 [Apr. '97] [STRFILE(1)](https://www.chedong.com/phpMan.php/man/STRFILE/1/markdown)