In a declaration, I have:
const char comment_begin = "<!--";
const char comment_end = "-->";
const int comment_begin_len = strlen(comment_begin);
const int comment_end_len = strlen(comment_end);
When I compile, I get the warnings:
emhttpc.c:64: warning: initializer element is not... (10 Replies)
Dear Folks :),
I am new to UNIX scripting and I do not know how can I insert some text in the first column of a UNIX text file at command promtp.
I can do this in vi editor by using this command :g/^/s//BBB_
e,g I have a file named as Test.dat and it containins below text:
michal... (4 Replies)
Hi,
I have a file from which i need to extract data between two constant strings.
The data looks like this :
Line 1 SUN> read db @cmpd unit 60
Line 2 Parameter: CMPD -> "C00071"
Line 3
Line 4 SUN> generate
Line 5 tabint>ERROR: (Variable data)
The data i need to extract is... (11 Replies)
Hi All,
From the title you may know that this question has been asked several times and I have done lot of Googling on this.
I have a Wikipedia dump file in XML format. All the contents are in one XML file i.e. all different topics have been put in one XML file. Now I need to separate them and... (1 Reply)
Hello!
Can anybody suggest about the fastest way of extracting "n" random columns from a very large file (tab separated) having thousands of columns, where n can be any specified number.
Thanks! (10 Replies)
Hi All !
I am just trying to print bash variable in awk statement as string
here is my script
n=1
for file in `ls *.tk |sort -t"-" -k2n,2`; do
ak=`(awk 'FNR=='$n'{print $0}' res.dat)`
awk '{print "'$ak'",$0}' OFS="\t" $file
n=$((n+1))
unset ak
doneI am getting following error
awk:... (7 Replies)
I wonder string constant exists permanently or temporary.
For example,
printf("hello, world");
the function printf access to it is through a pointer. Does it mean storage is allocated for the string constant to exist permanently in memory? :confused: (4 Replies)
Hi,
I need to write a bash script that will random choose and login into these below ip addresses.
192.168.116.130
192.168.116.131
192.168.116.132
192.168.116.133
I'm new into scripting and I need to enhance my logic. Below is what i did
... (4 Replies)
Discussion started by: Milon
4 Replies
LEARN ABOUT MOJAVE
random
RANDOM(4) BSD Kernel Interfaces Manual RANDOM(4)NAME
random , urandom -- random data source devices.
SYNOPSIS
pseudo-device random
DESCRIPTION
The random device produces uniformly distributed random byte values of potentially high quality.
To obtain random bytes, open /dev/random for reading and read from it.
The same random data is also available from getentropy(2). Using the getentropy(2) system call interface will provide resiliency to file
descriptor exhaustion, chroot, or sandboxing which can make /dev/random unavailable. Additionally, the arc4random(3) API provides a fast
userspace random number generator built on the random data source and is preferred over directly accessing the system's random device.
/dev/urandom is a compatibility nod to Linux. On Linux, /dev/urandom will produce lower quality output if the entropy pool drains, while
/dev/random will prefer to block and wait for additional entropy to be collected. With Yarrow, this choice and distinction is not necessary,
and the two devices behave identically. You may use either.
The random device implements the Yarrow pseudo random number generator algorithm and maintains its entropy pool. The kernel automatically
seeds the algorithm with additional entropy during normal execution.
FILES
/dev/random
/dev/urandom
HISTORY
A random device appeared in the Linux operating system.
Darwin September 6, 2001 Darwin