I just had a filesystem / file corruption issue on my HSP's server due to disk capacity limits and fileswapping. I discovered that certain files got corrupted when fileswapping was not successful and they ended up with a string of control characters, or what I believe to be nulls, in them.
Does... (4 Replies)
I'm relatively new to Pro*C programming. In the following example:
char name; EXEC SQL SELECT 'John Doe' INTO :name FROM DUAL;
"John Doe" is in positions 0-7, blanks in 8-19, and a null in 20. I would really prefer the null to be in position 8 and I don't care what's after that. I wrote a... (1 Reply)
Hi,
I am trying to replace nulls with spaces in every record of a '|' delimited file. I used this command -
cat input.dat | sed 's/||/| |/g' > output
But if a space appears twice '| | |' , then only the first null is getting replaced with a space. The second one remains as a null. I... (7 Replies)
Hi All,
I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
When I try to sort a file where some records contain nulls i.e. hex 00 the sort truncates the record when it reaches the null and writes message:
"sort: warning: missing NEWLINE added at end of input file myfile"
I'm assuming from this that the sort sees the null as a special character and... (6 Replies)
Hi,
i have a file which contains data in fixed length. each row contains data of 10 characters fixed length. The data in the file appears like 4567782882
some times i may recieve dat less than fixed length of 10. in such a case i find nulls appended at the trailing spaces when i do a... (2 Replies)
I am trying to count the number of columns in a delimited flat file. The record is tab delimited. When I use the command wc -w, I am getting unexpected results when the record contains a NULL value. I believe it is because there is a "word" missing.
The below example will return 4 words... (2 Replies)
Ok,
I'm stuck here with a plan to get what I need done completed.
I want to use perl to produce a document. lets say the document will be a pdf document.
Now, is there a way for me to put a tiny little code in that pdf document that can make the pdf file null itself if run on a non-unix... (2 Replies)
I want to remove from a file the trailing null characters (0x00) and stop doing so when a different byte is found (which should not be deleted), and either put the result to the same file or a different one.
Any ideas? (9 Replies)
Discussion started by: Tribe
9 Replies
LEARN ABOUT CENTOS
rngtest
RNGTEST(1) General Commands Manual RNGTEST(1)NAME
rngtest - Check the randomness of data using FIPS 140-2 tests
SYNOPSIS
rngtest [-c n | --blockcount=n] [-b n | --blockstats=n] [-t n | --timedstats=n] [-p | --pipe] [-?] [--help] [-V] [--version]
DESCRIPTION
rngtest works on blocks of 20000 bits at a time, using the FIPS 140-2 (errata of 2001-10-10) tests to verify the randomness of the block of
data.
It takes input from stdin, and outputs statistics to stderr, optionally echoing blocks that passed the FIPS tests to stdout (when operating
in pipe mode). Errors are sent to stderr.
At startup, rngtest will trow away the first 32 bits of data when operating in pipe mode. It will use the next 32 bits of data to boot-
strap the FIPS tests (even when not operating in pipe mode). These bits are not tested for randomness.
Statistics are dumped to stderr when the program exits.
OPTIONS -p, --pipe
Enable pipe mode. All data blocks that pass the FIPS tests are echoed to stdout, and rngtest operates in silent mode.
-c n, --blockcount=n (default: 0)
Exit after processing n input blocks, if n is not zero.
-b n, --blockstats=n (default: 0)
Dump statistics every n blocks, if n is not zero.
-t n, --timedstats=n (default: 0)
Dump statistics every n seconds, if n is not zero.
-?, --help
Give a short summary of all program options.
-V, --version
Print program version
STATISTICS
rngtest will dump statistics to stderr when it exits, and when told to by blockstats or timedstats.
FIPS 140-2 successes and FIPS 140-2 failures counts the number of 20000-bit blocks either accepted or rejected by the FIPS 140-2 tests.
The other statistics show a breakdown of the FIPS 140-2 failures by FIPS 140-2 test. See the FIPS 140-2 document for more information
(note that these tests are defined on FIPS 140-1 and FIPS 140-2 errata of 2001-10-10. They were removed in FIPS 140-2 errata of
2002-12-03).
The speed statistics are taken for every 20000-bit block transferred or processed.
EXIT STATUS
0 if no errors happen, and no blocks fail the FIPS tests.
1 if no errors happen, but at least one block fails the FIPS tests.
10 if there are problems with the parameters.
11 if an input/output error happens.
12 if an operating system or resource starvation error happens.
SEE ALSO random(4), rngd(8)
FIPS PUB 140-2 Security Requirements for Cryptographic Modules, NIST,
http://csrc.nist.gov/cryptval/140-2.htm
AUTHORS
Henrique de Moraes Holschuh <hmh@debian.org>
rng-tools 4 March 2004 RNGTEST(1)