10-20-2008
Quote:
A character array is never empty. It is a contiguous array of memory cells, each of which contains some value. You are using a character array to represent strings; as such, you must manage the terminating NULL byte '\0'.
If you want to use strcpy(), you must ensure that there is a NULL byte at the location where you want the copy to begin. If you are trying to copy into an array for the first time, use strcat(). Use strcpy() to append to an existing array (or again, set the first byte to '\0').
It is not useful to attempt to diagnose other errors you see when there are likely out of bounds array copies occurring, as the stack becomes trashed.
Never use any function that copies memory from one location to another which is of unknown length, or copy a know length to an offset that would make the copy exceed the bounds of the variable or data structure. Use strncat() or strncpy() to ensure the copy never exceeds the variable's bounds.
Thanks!!!! This advice will help me now and later on .... I will play around with it....Anyhow, i was trying to write a simple very basic local port scanner, do you think the algorithm of my code right?
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
hi!,
here is an interesting problem .....
I ftp a file named " my first file.doc" from windows to my HP workstation.
Ftp is succesful. The file appears with the same name in my home directory.. But now how do I open this file??
while using Vi or More or other editor, they take only the... (5 Replies)
Discussion started by: jyotipg
5 Replies
2. UNIX for Advanced & Expert Users
After a server reboot for regular mainatanance we face the following situation:
1/ user accounts with ksh can't start the korn shell
2/ korn shell scripts do work however, if executed from bash
3/ normal users with bash can't run ksh
4/ root can run ksh
5/ if I switch the default shell to... (3 Replies)
Discussion started by: rein
3 Replies
3. SCO
We have an inhouse built application which handles our AR function. We'd like to email statements out of the application directly. My question is this is there a good, solid, command line driven, scriptable Mail Transport Agent that would allow us to send a semi unique email (with a statement and... (1 Reply)
Discussion started by: Maldain
1 Replies
4. Shell Programming and Scripting
Hello,
So I'm utilizing the bash brace expansion feature to checkout multiple folders from cvs with ease, while excluding certain subfolders within. So I do a command like this:
cvs co trunk/{mod_a,mod_b,mod_c} \!trunk/{mod_a,mod_b,mod_c}/web
to checkout modules trunk/mod_a , trunk/mod_b ,... (1 Reply)
Discussion started by: neked
1 Replies
5. Shell Programming and Scripting
Hi,
I am new in this forum and I am glad to be a part of it. I have a problem that has two parts:
1/ extract just the timestamp from a filename: for example, I have a file called 'sales20080226144525.txt' and I want to extract just the '20080226144525' part out of it.
2/ Now, take that... (5 Replies)
Discussion started by: ChicagoBlues
5 Replies
6. Solaris
Ok Lets say i have a webpage on a solaris box. and i am trying to
make a hyperlink.
This hyperlink references a Microsoft Access file on a Windows box.
So, How do i make a file reference from The unix box to a windows box.
Things to keep in mind
--
1.) Solaris doesnt need to... (6 Replies)
Discussion started by: Demon002
6 Replies
7. Shell Programming and Scripting
When I did,
echo $SHELL in cmd prompt of putty,
its displaying /bin/sh
And in my shell script.,
I hav started with.,
#!/bin/sh
and
i=1;
while ;
do
.
.
.
i=$; (9 Replies)
Discussion started by: av_vinay
9 Replies
8. Shell Programming and Scripting
Hi Guys ,
I am having one command file like this
FILE1
################################
awk '/output/ {a=$2} {for(i=1;i<=NF;i++) { gsub("i1", i) ; gsub("i2",++i) ; gsub("P1", p) }}1' output >> out9
awk '/output/ {a=$2} {for(i=1;i<=NF;i++) { gsub("i1", i) ;... (2 Replies)
Discussion started by: jaita
2 Replies
9. Solaris
Hi Folks,
Have an interesting problem here, have just upgraded some machines (Test and Development) to the latest and greatest as in.
SunOS ss063a 5.10 Generic_147440-13 sun4u sparc SUNW,Sun-Fire-V440
However on all the systems we are seeing the same problems, during the boot there is a... (3 Replies)
Discussion started by: gull04
3 Replies
10. Shell Programming and Scripting
Hello;
I wish to manipulate the output from the following:
ps axo %mem,pid,euser,cmd|sort -nr
14.4 3170 root /usr/sbin/snmpd -Lsd -Lf /dev/null -p /var/run/snmpd.pid -a
3.6 3635 root splunkd -p 8089 start
2.6 3383 root /usr/sbin/httpd
2.1 15496 apache /usr/sbin/httpd
... (5 Replies)
Discussion started by: delphys
5 Replies
LEARN ABOUT DEBIAN
graphics::primitive::insets
Graphics::Primitive::Insets(3pm) User Contributed Perl Documentation Graphics::Primitive::Insets(3pm)
NAME
Graphics::Primitive::Insets - Space between things
DESCRIPTION
Graphics::Primitive::Insets represents the amount of space that surrounds something. This object can be used to represent either padding
or margins (in the CSS sense, one being inside the bounding box, the other being outside)
SYNOPSIS
use Graphics::Primitive::Insets;
my $insets = Graphics::Primitive::Insets->new({
top => 5,
bottom => 5,
left => 5,
right => 5
});
METHODS
Constructor
new Creates a new Graphics::Primitive::Insets.
Instance Methods
as_array
Return these insets as an array in the form of top, right, bottom and left.
bottom
Set/Get the inset from the bottom.
equal_to
Determine if these Insets are equal to another.
left
Set/Get the inset from the left.
right
Set/Get the inset from the right.
top Set/Get the inset from the top.
zero
Sets all the insets (top, left, bottom, right) to 0.
AUTHOR
Cory Watson, "<gphat@cpan.org>"
SEE ALSO
perl(1)
COPYRIGHT & LICENSE
Copyright 2008-2010 by Cory G Watson.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.3 2010-08-21 Graphics::Primitive::Insets(3pm)