Thank you for your help!!, I'll try your code to begin with no doubt.
And yes, FF 33 is the end of the file, after the 33 follow some bytes that represent the date and hour, not of interest. 0x33 is iso coded, so in ascii is the number 3.
For more details below is the main structure I mentioned in my 1rst post:
Thank you for your help ahamed.
---------- Post updated at 03:05 PM ---------- Previous update was at 01:07 PM ----------
Hello again ahamed,
It works nice!
Now for each block I try to extract (if present) the bytes after the FF 34 and begins with 0x03 followed by 0x80 or 0x81or 0x83 or 0x86 or 0x87 more 16 bytes more how it is shown in image attched in previous post.
I've added a new line as below:
But how to include it in the "if" statement and extract those bytes only when the 0x03 0x8Z (where Z could be 0,1,3,6,7) appears after the occurrence of 0xFF 0x34?
For each block I'd like to have one line in put file.
Hi all,
Does anybody know or guide me on how to remove the first N bytes and the last N bytes from a binary file? Is there any AWK or SED or any command that I can use to achieve this?
Your help is greatly appreciated!!
Best Regards,
Naveen. (1 Reply)
Hello,
I have come across the necessity for me to deal with binary sequences and I had a few questions.
1- Does any UNIX scripting language provide any tool or command for converting text data to binary sequences? Example of binary sequence: "0x97 0x93 0x85 0x40 0xd5 0xd6 0xd7"
2- If I want... (2 Replies)
Hi,
I have an one-line file consisting of a sequence of 660 letters. I would like to extract 9-letter blocks iteratively:
ASDFGHJKLQWERTYUIOPZXCVBNM
first block: ASDFGHJKL
1nd block: SDFGHJKLQ
What I have so far only gives me the first block, can anyone please explain why?
cat... (7 Replies)
Hi,
This is part of a large text file I need to separate out.
I'd like some help to build a shell script that will extract the text between sets of dashed lines, write that to a new file using the whole or part of the first text string as the new file name, then move on to the next one and... (7 Replies)
The title is clear: why does ext3 allocate 8 blocks for files that are few bytes long?
If I create a file named "test", put a few chars in it, and then I run:
stat test
I get that "Blocks: 8"
I searched in the web and found that ext does that, it allocates 8 blocks even if It doesn't need... (4 Replies)
Hello guys. I really hope someone will help me with this one..
So, I have to write this script who:
- creates a file home/student/vmdisk of 10 mb
- formats that file to ext3
- mounts that partition to /mnt/partition
- creates a file /mnt/partition/data. In this file, there will... (1 Reply)
Hi,
I have a file with more than 28000 records and it looks like below..
>mm10_refflat_ABCD range=chr1:1234567-2345678
tgtgcacactacacatgactagtacatgactagac....so on
>mm10_refflat_BCD range=chr1:3234567-4545678...
tgtgcacactacacatgactagtatgtgcacactacacatgactagta
.
.
.
.
.
so on
... (2 Replies)
I have a fastq file from small RNA sequencing with sequence lengths between 15 - 30. I wanted to filter sequence lengths between 21-25 and write to another fastq file. how can i do that? (4 Replies)
I have a text file, input.fasta contains some protein sequences. input.fasta is shown below.
>P02649
MKVLWAALLVTFLAGCQAKVEQAVETEPEPELRQQTEWQSGQRWELALGRFWDYLRWVQT
LSEQVQEELLSSQVTQELRALMDETMKELKAYKSELEEQLTPVAEETRARLSKELQAAQA
RLGADMEDVCGRLVQYRGEVQAMLGQSTEELRVRLASHLRKLRKRLLRDADDLQKRLAVY... (8 Replies)
I sat down yesterday to write this script and have just realised that my methodology is broken........
In essense I have.....
----------------------------------------------------------------- (This line really is in the file)
Service ID: 12345 ... (7 Replies)
Discussion started by: Bashingaway
7 Replies
LEARN ABOUT NETBSD
ssp
SSP(3) BSD Library Functions Manual SSP(3)NAME
ssp -- bounds checked libc functions
LIBRARY
Buffer Overflow Protection Library (libssp, -lssp)
SYNOPSIS
#include <ssp/stdio.h>
int
sprintf(char *str, const char *fmt, ...);
int
vsprintf(char *str, const char *fmt, va_list ap);
int
snprintf(char *str, size_t len, const char *fmt, ...);
int
vsnprintf(char *str, size_t len, const char *fmt, va_list ap);
char *
gets(char *str);
char *
fgets(char *str, int len, FILE *fp);
#include <ssp/string.h>
void *
memcpy(void *str, const void *ptr, size_t len);
void *
memmove(void *str, const void *ptr, size_t len);
void *
memset(void *str, int val, size_t len);
char *
strcpy(char *str, const char *ptr, size_t len);
char *
strcat(char *str, const char *ptr, size_t len);
char *
strncpy(char *str, const char *ptr, size_t len);
char *
strncat(char *str, const char *ptr, size_t len);
#include <ssp/strings.h>
void *
bcopy(const void *ptr, void *str, size_t len);
void *
bzero(void *str, size_t len);
#include <ssp/unistd.h>
ssize_t
read(int fd, void *str, size_t len);
int
readlink(const char * restrict path, char * restrict str, size_t len);
int
getcwd(char *str, size_t len);
DESCRIPTION
When _FORTIFY_SOURCE bounds checking is enabled as described below, the above functions get overwritten to use the __builtin_object_size(3)
function to compute the size of str, if known at compile time, and perform bounds check on it in order to avoid data buffer or stack buffer
overflows. If an overflow is detected, the routines will call abort(3).
To enable these function overrides the following should be added to the gcc(1) command line: ``-I/usr/include/ssp'' to override the standard
include files and ``-D_FORTIFY_SOURCE=1'' or ``-D_FORTIFY_SOURCE=2''.
If _FORTIFY_SOURCE is set to 1 the code will compute the maximum possible buffer size for str, and if set to 2 it will compute the minimum
buffer size.
SEE ALSO gcc(1), __builtin_object_size(3), stdio(3), string(3), security(7)HISTORY
The ssp library appeared NetBSD 4.0.
BSD March 21, 2011 BSD