Everytime when a specific binaryfile grows (in 4 byte steps) I want to get the newest 2 bytes immediately when they occur. That can be done by
but I need the bytes in hex format. Therefore I use hexdump
what only prints out complete lines of 16 bytes. But I need the last bytes immediately when the binfile grows not waiting until 16 bytes are reached. So I tried
where hexdump prints the last 2 bytes only but tail stops after that and does not check the binfile constantly.
I put this into a loop, checking the binfile for changes in filesize
So, in principle this works but I think this is no good style and performance optimized, is it? Any ideas how to convert the byte directly out of tail -f binfile ?
Last edited by maloe; 09-10-2009 at 03:39 PM..
Reason: tail [COLOR="Red"][B]- f[/B][/COLOR]
Here is what I did . . . . I FTP'd several *.pdf files from a web site to a UNIX server, and did not set the transfer mode to BIN, now Adobe thinks that the documents are corrupted. Is there a way to convert the *.pdf files to Binary so that Adobe can open them again. I would just re-download... (2 Replies)
Dear Experts
I need to read a binary file. I know for example in byte number 3801-3804 there is a 4 byte number embeded. Is there a way to extract this number from this file and then convert it to ascii via unix??
Your help would be highly appreciated.
Very Best Regards
Reza (5 Replies)
Hi all,
I have a print control file (dflt) for Oracle which is in binary. As I am going to develope an application in Window environment, I would like to reference the dflt file. But it is in binary format and I cannot access it. Anyone can suggest me how to convert the file into text or... (5 Replies)
i hav tried to convert binary 2D data into text using binreader and writing into text file using streamwriter.
i use ReadSingle() function to convert from binary to ascii, although it works good in 1D data but not in more dimensions.
the kind of values i get are
-1.265369923E+038
and like
... (2 Replies)
Folks,
can anyone help with a script to convert hex to binary digits, and break the 32 bit binary into packs of 4 and send them to 8 different variables.Any help is sincerely appreciated.
Thanks
venu
Its in korn shell...... (24 Replies)
Hi
I need to display the binary text of an clearn text which is sent as input to the shell script (c shell);
ex: I will pass "HELLO" as input, and i should get the binary format of the text
Thanks in advance
Mohan (1 Reply)
Hi All,
Iam new to unix scripting and I want a split a string into 4 characters each, leaving the last two characters and convert the splitted values into binary.
For example:
string='ffd80012ffe20000ffebfffeffea0007fff0ffd70014fff1fff0fff0fff201'
this should split as
ffd8
0012
ffe2
.
.... (5 Replies)
Hello *nix specialists,
Im working for a non profit organisation in Germany to transport DSL over WLAN to people in areas without no DSL. We are using Linksys WRT 54 router with DD-WRT firmware There are at the moment over 180 router running but we have to change some settings next time. So my... (7 Replies)
I have a huge files in binary format
thanks to help me in finding a way to convert these files from Binary format to ASCII format. (0 Replies)
Discussion started by: PRINCESS_RORO
0 Replies
LEARN ABOUT CENTOS
tcl_newbytearrayobj
Tcl_ByteArrayObj(3) Tcl Library Procedures Tcl_ByteArrayObj(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_NewByteArrayObj, Tcl_SetByteArrayObj, Tcl_GetByteArrayFromObj, Tcl_SetByteArrayLength - manipulate Tcl objects as a arrays of bytes
SYNOPSIS
#include <tcl.h>
Tcl_Obj *
Tcl_NewByteArrayObj(bytes, length)
void
Tcl_SetByteArrayObj(objPtr, bytes, length)
unsigned char *
Tcl_GetByteArrayFromObj(objPtr, lengthPtr)
unsigned char *
Tcl_SetByteArrayLength(objPtr, length)
ARGUMENTS
const unsigned char *bytes (in) The array of bytes used to initialize or set a byte-array object.
int length (in) The length of the array of bytes. It must be >= 0.
Tcl_Obj *objPtr (in/out) For Tcl_SetByteArrayObj, this points to the object to be converted to byte-array type. For
Tcl_GetByteArrayFromObj and Tcl_SetByteArrayLength, this points to the object from which to
get the byte-array value; if objPtr does not already point to a byte-array object, it will be
converted to one.
int *lengthPtr (out) If non-NULL, filled with the length of the array of bytes in the object.
_________________________________________________________________DESCRIPTION
These procedures are used to create, modify, and read Tcl byte-array objects from C code. Byte-array objects are typically used to hold
the results of binary IO operations or data structures created with the binary command. In Tcl, an array of bytes is not equivalent to a
string. Conceptually, a string is an array of Unicode characters, while a byte-array is an array of 8-bit quantities with no implicit
meaning. Accessor functions are provided to get the string representation of a byte-array or to convert an arbitrary object to a byte-
array. Obtaining the string representation of a byte-array object (by calling Tcl_GetStringFromObj) produces a properly formed UTF-8
sequence with a one-to-one mapping between the bytes in the internal representation and the UTF-8 characters in the string representation.
Tcl_NewByteArrayObj and Tcl_SetByteArrayObj will create a new object of byte-array type or modify an existing object to have a byte-array
type. Both of these procedures set the object's type to be byte-array and set the object's internal representation to a copy of the array
of bytes given by bytes. Tcl_NewByteArrayObj returns a pointer to a newly allocated object with a reference count of zero. Tcl_SetByteAr-
rayObj invalidates any old string representation and, if the object is not already a byte-array object, frees any old internal representa-
tion.
Tcl_GetByteArrayFromObj converts a Tcl object to byte-array type and returns a pointer to the object's new internal representation as an
array of bytes. The length of this array is stored in lengthPtr if lengthPtr is non-NULL. The storage for the array of bytes is owned by
the object and should not be freed. The contents of the array may be modified by the caller only if the object is not shared and the call-
er invalidates the string representation.
Tcl_SetByteArrayLength converts the Tcl object to byte-array type and changes the length of the object's internal representation as an
array of bytes. If length is greater than the space currently allocated for the array, the array is reallocated to the new length; the
newly allocated bytes at the end of the array have arbitrary values. If length is less than the space currently allocated for the array,
the length of array is reduced to the new length. The return value is a pointer to the object's new array of bytes.
SEE ALSO
Tcl_GetStringFromObj, Tcl_NewObj, Tcl_IncrRefCount, Tcl_DecrRefCount
KEYWORDS
object, byte array, utf, unicode, internationalization
Tcl 8.1 Tcl_ByteArrayObj(3)