on my desktop i am using the kde rotating desktop image option. this rotates images randomly every half hour. now, i would like to write an html file which will have an inline frame with some text, maybe system messages, or my friends live journal thati read alot, or unix.com! however, i dont want... (1 Reply)
I have a directory of files that look like filename 001.ext, filename 002.ext, etc. I'd like to rename the files with unique random numbered names, so that the original filenames are stripped and the files are given a new, random number name. I'm not super new to UNIX, but I don't often use it for... (2 Replies)
Hi there!
I am really enjoying working with sed. I am trying to come up with a sed command to replace some occurrences (not all) in the same line, for instance:
I have a command which the output will be:
200.300.400.5 0A 0B 0C 01 02 03
being that the last 6 strings are actually one... (7 Replies)
I have a text (text.txt) and I would like to replace only the first 2 occurrences of a word (but I might need to replace more):
For example, if text is this:
CAR sweet head
hat red yellow
CAR book brown
tiger CAR cow CAR
CAR milk
I would like to replace the word "CAR" with word... (12 Replies)
I want to create a cron job randomly once a day for my site's registration.
The responsible file for registrations is a config file and I need to change the contents
twice on day (on and off)
I know the way for random cron job for example
*/n * * * * /usr/local/bin/php... (6 Replies)
Hi,
I tried to adapt bartus's solution to my problem, without success. I want to replace all the occurences of this:
with:
, where something can contain an arbitrary number of balanced parens and brakets.
Any ideas ?
Best, (1 Reply)
Hi,
(First post, please be gental!)
I have a java app that I am running on unix (centos)
But it keeps dying randomly. The times seem random from anything between 3 hours and 3 days.
I have a cronjob running to restart it when ever it dies but I would rather this happened less often.
... (2 Replies)
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. (15 Replies)
Hey,
How can i create randomly create time N times.
Suppose i want to create data for a particualr date 5 times...
Mon Jan 19 11:42:50
Mon Jan 19 19:16:40
Mon Jan 19 12:12:33
Mon Jan 19 14:26:27
Mon Jan 19 12:29:53
Mon Jan 19 13:30:31
I want the script to create N times randome... (2 Replies)
Discussion started by: jaituteja
2 Replies
LEARN ABOUT SUNOS
rand_r
rand(3C) Standard C Library Functions rand(3C)NAME
rand, srand, rand_r - simple random-number generator
SYNOPSIS
#include <stdlib.h>
int rand(void);
void srand(unsigned int seed);
int rand_r(unsigned int *seed);
DESCRIPTION
The rand() function uses a multiplicative congruential random-number generator with period 2**32 that returns successive pseudo-random num-
bers in the range of 0 to RAND_MAX (defined in <stdlib.h>).
The srand() function uses the argument seed as a seed for a new sequence of pseudo-random numbers to be returned by subsequent calls to
rand(). If srand() is then called with the same seed value, the sequence of pseudo-random numbers will be repeated. If rand() is called
before any calls to srand() have been made, the same sequence will be generated as when srand() is first called with a seed value of 1.
The rand_r() function has the same functionality as rand() except that a pointer to a seed seed must be supplied by the caller. If
rand_r() is called with the same initial value for the object pointed to by seed and that object is not modified between successive calls
to rand_r(), the same sequence as that produced by calls to rand() will be generated.
The rand() and srand() functions provide per-process pseudo-random streams shared by all threads. The same effect can be achieved if all
threads call rand_r() with a pointer to the same seed object. The rand_r() function allows a thread to generate a private pseudo-random
stream by having the seed object be private to the thread.
USAGE
The spectral properties of rand() are limited. The drand48(3C) function provides a better, more elaborate random-number generator.
When compiling multithreaded applications, the _REENTRANT flag must be defined on the compile line. This flag should be used only in mul-
tithreaded applications.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO drand48(3C), attributes(5), standards(5)SunOS 5.10 19 May 2004 rand(3C)