Here are a couple of examples that should illustrate enough to get you going. You should be able to figure out how to 'plug' your code into a loop like one of these:
Heres a script i wrote as a bit of practise. What it does is insert a line in the middle of a file. The line being $1 and the file being $2
#!/bin/bash
rm tempfile
touch tempfile
count=1
linenum= `wc -l < $2`
if
then
echo $1 >> $2
else
even=`expr "$linenum" % 2`
if
then... (3 Replies)
Hallo everyone
I might just be being dumb, but I am using the BASH shell and cannot get the following script to work:
x=0
while
do
echo $x
x=´echo "$x + 1" | bc´
done
Can anybody help me out. I am just get a repeating output saying:
bc: command not found
0 + 1: command not... (5 Replies)
i have the following process running in background:
when i give "ps -lef"
------------------------------------------------------------------------
user2
user1
user1
user3
user1
user4
user5
user4
user3
user4
user2
user1
user1
user3
user1
user4 (3 Replies)
Hi expert,
I'm using csh
Code:
#!/bin/csh
set x = 0
set number = `awk '{array=$0} END {print array;}'`
i want to use for loop to store data to $number repeatly
untill x = 23
How to use c shell for loop? (2 Replies)
I need to chmod a bunch of files with a specific extension in one directory.
If I understand correctly first I would run ls command like this
ls -R | grep .mp3 > /tmp/list
once I have the output file I should be able to run a loop to chmod all the files in the list created.
This is where... (5 Replies)
Hello,
I'm trying to write a while loop for a decimal value in tcsh which I know can't be done. Instead I want my increments to be one order of magnitude too large and then divide it by 10 when I use the variable. However, I don't know how to divide my variable and set it as another.
set... (1 Reply)
Does any body can help me with a loop in this example?
if
then
if
then
runner=$(grep "$1" "$2")
runne=$(grep "$1" "$3")
run=$(grep "$1" "$4")
fi
fi
#
# Message on screen... (3 Replies)
I am trying to make a calculator. The user Enters number 1, chooses and operation, enters number 2, then chooses another operation or for the answer to be displayed.
eg. 1 + 1 = or 1 + 1 + 2 + 1 =
Both of these should be possible.
#!/bin/bash
read -p "what's the first number? " n1... (3 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known/data:
Script a simple calculator. In the command line enter the script file
/home/etc/mycalc or /home/etc/mycalc 1 +... (6 Replies)
ADE is a UNIX environment for the ancient AMIGA A1200. By default this does NOT have the 'bc' command line calculator.
Although I did a DEMO code to create a C source and compile it under python 1.4.0 and ADE using ksh88 and the gcc of the day, I decided to create this baby that requires no Python... (2 Replies)
Discussion started by: wisecracker
2 Replies
LEARN ABOUT REDHAT
des_read_pw_string
ui_compat(3) OpenSSL ui_compat(3)NAME
des_read_password, des_read_2passwords, des_read_pw_string, des_read_pw - Compatibility user interface functions
SYNOPSIS
int des_read_password(DES_cblock *key,const char *prompt,int verify);
int des_read_2passwords(DES_cblock *key1,DES_cblock *key2,
const char *prompt,int verify);
int des_read_pw_string(char *buf,int length,const char *prompt,int verify);
int des_read_pw(char *buf,char *buff,int size,const char *prompt,int verify);
DESCRIPTION
The DES library contained a few routines to prompt for passwords. These aren't necessarely dependent on DES, and have therefore become
part of the UI compatibility library.
des_read_pw() writes the string specified by prompt to standard output turns echo off and reads an input string from the terminal. The
string is returned in buf, which must have spac for at least size bytes. If verify is set, the user is asked for the password twice and
unless the two copies match, an error is returned. The second password is stored in buff, which must therefore also be at least size
bytes. A return code of -1 indicates a system error, 1 failure due to use interaction, and 0 is success. All other functions described
here use des_read_pw() to do the work.
des_read_pw_string() is a variant of des_read_pw() that provides a buffer for you if verify is set.
des_read_password() calls des_read_pw() and converts the password to a DES key by calling DES_string_to_key(); des_read_2password() oper-
ates in the same way as des_read_password() except that it generates two keys by using the DES_string_to_2key() function.
NOTES
des_read_pw_string() is available in the MIT Kerberos library as well, and is also available under the name EVP_read_pw_string().
SEE ALSO ui(3), ui_create(3)AUTHOR
Richard Levitte (richard@levitte.org) for the OpenSSL project (http://www.openssl.org).
0.9.7a 2001-10-25 ui_compat(3)