# rand(3) [minix man page]

RAND(3) 						     Library Functions Manual							   RAND(3)

NAME
rand, srand - random number generator SYNOPSIS
#include <stdlib.h> void srand(unsigned seed) unsigned rand(void) DESCRIPTION
Rand uses a multiplicative congruential random number generator with period 2**32 to return successive pseudo-random numbers in the range from 0 to RAND_MAX. The generator is reinitialized by calling srand with 1 as argument. It can be set to a random starting point by calling srand with what- ever you like as argument. SEE ALSO
random(3). 7th Edition September 29, 1985 RAND(3)

## Check Out this Related Man Page

RAND(3) 						   BSD Library Functions Manual 						   RAND(3)

NAME
rand, rand_r, srand, sranddev -- bad random number generator LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdlib.h> int rand(void); int rand_r(unsigned *seed); void srand(unsigned seed); void sranddev(void); DESCRIPTION
These interfaces are obsoleted by arc4random(3). The rand() function computes a sequence of pseudo-random integers in the range of 0 to RAND_MAX (as defined by the header file <stdlib.h>). The srand() function sets its argument seed as the seed for a new sequence of pseudo-random numbers to be returned by rand(). These sequences are repeatable by calling srand() with the same seed value. If no seed value is provided, the functions are automatically seeded with a value of 1. The sranddev() function initializes a seed, using the random(4) random number device which returns good random numbers. However, the rand() function still remains unsuitable for cryptographic use. The rand_r() function provides the same functionality as rand(). A pointer to the context value seed must be supplied by the caller. SEE ALSO
arc4random(3), random(3), random(4) STANDARDS
The rand() and srand() functions conform to ISO/IEC 9899:1990 (``ISO C90''). The rand_r() function is as proposed in the POSIX.4a Draft #6 document. BSD
May 25, 1999 BSD
Man Page

## randomization

I have two files: First file with 10 words, as follow: randomword1, randomword2, randomword3, randomword4, etc... Second File shell script. word=\$(cat hangman_words | cut -d" " -f1) letters=\$(echo \$word | wc -c) letters=\$(( \$letters - 1 )) echo \$letters echo \$word The script...

## \$RANDOM does not work inside a shell script

Hi folks I'm coding on Ubuntu 9.04 standard shell. I'm writing a script that needs to generate a random number at some point of its execution. When I do echo \$RANDOMas a command inside shell, I clearly get some randomly generated number However when I do i=`\$RANDOM` echo \$ior even...

## 3. Programming

Hi, Following is the trimmed down version of the code I'm using to generate a set of random numbers using erand48 #include <stdio.h> #include <stdlib.h> #include <math.h> main() { unsigned short xsubi; xsubi=10; double r; int x; int i=0,...

## Help with removal of spaces between operators and operands

Hi I'm trying to remove blank spaces in expressions and function calls.. Consider the following example printf ("Hello"); a = a + b; I'm trying to eliminate space in between the function name and the opening brace. And also eliminate space between operators and operands.. That is, I'm...

## Shell script that runs a random shell script

Hi, im trying to make a shell script that basically runs a random shell script form a list of shell scripts i specify. Im not very good at writing shell scripts, and am new to linux. Thanks in advance :)

## Randomize letters

Hi, Is there a tool somewhat parallel to rev, but which randomizes instead of reverses? I've tried rl, but I can only get it to randomize words. I was hoping for something like this echo "hello" | ran leolh less simpler solutions are also welcome. Sorry if the question is...

## Get 20% of lines in File randomly

Hello, This is my code: nb_lignes=`wc -l \$1 | cut -d " " -f1` for i in \$(seq \$nb_lignes) do m=`head \$1 -n \$i | tail -1` //command done Please how can i change it to get Get 20% of lines in File randomly to apply "command" on each line ? 20% or 40% or 60 % (it's a parameter) Thank you.

## Randomly selecting sequences and generating specific output files

I have two files containing hundreds of different sequences with the same Identifiers (ID-001, ID-002, etc.,), something like this: Infile1: ID-001 ATGGGAGCGGGGGCGTCTGCCTTGAGGGGAGAGAAGCTAGATACA ID-002 ATGGGAGCGGGGGCGTCTGTTTTGAGGGGAGAGAAGCTAGATACA ID-003...

## 9. Shell Programming and Scripting

Hi, I've been attempting to create a script that downloads web pages at random intervals to mimic typical user usage. However I'm struggling to link \$url to the URL list and thus wget complains of a missing URL. Any ideas? Thanks #!/bin/sh #URL List url1="http://www.bbc.co.uk"...

## UNIX script for making random numbers without repetition

Hello, I have a column which have 7200 numbers and I am deciding to pick up 1440 numbers randomly without any reputation? Could any one let me know which script in unix will be work for my case? Regards Sajjad

## Help with appending random sequence to huge CDR file

Hi, I am in a terrible emergency. I have multiple cdr files with line count >6000. I need to append |0| | | | | | | |random| to end of each line. The random number should never repeat. Please help with a shell script to process all cdr's in a directory with above requirement.

## What brand is your primary computer?

A poll is added. Please vote and share your experiences. :b: If you select option: Other Brand then please post the brand name

## Random letters

Hi there, first of all this is not homework...this is a new type of exercise for practicing vocabulary with my students. I have a file consisting of two columns, separated by a tab, each line consisting of a word and its definition, separated by a line break. What i need is to replace a...

## Help setting up a bhyve branded zone

So I started with following the example on the omnios page for bhyve (sorry, I can't provide the link because I'm a post shy of the 5 to give a URL): And found that in the end I was able to create a running bhyve zone, but accessing it via zlogin results in a blank console. I've tried Debian 9...

## Cant log in from external monitor on laptop with broken screen.

Hello. I am installing Kali Linux on a laptop with no monitor. The installation goes fine through the external monitor and I can see the GRUB menu on boot, but once it comes time to log in it acts like my non existant laptop screen is my main monitor to type my login info on while my external is...