This seems to be not time-critical, so you could write a nonce-script, like so on file z7:
Code:
#!/usr/bin/env dash
#!/usr/local/bin/dash
cat >delay.sh <<EOF
#!/usr/bin/env dash
delayme()
{
echo "Sleep for 2 second."
sleep 2
}
delayme
EOF
chmod +x delay.sh
echo "Test the function."
# delayme
./delay.sh
echo "Test the timer."
# time ./delayme
time ./delay.sh
echo ""
echo "Test a real command."
time sleep 1
producing:
Code:
$ ./z7
Test the function.
Sleep for 2 second.
Test the timer.
Sleep for 2 second.
2.01 real 0.00 user 0.00 sys
Test a real command.
1.01 real 0.00 user 0.00 sys
On a system like:
Code:
OS, ker|rel, machine: Apple/BSD, Darwin 16.7.0, x86_64
Distribution : macOS 10.12.6 (16G29), Sierra
dash - ( local: /usr/local/bin/dash, 2017-09-12 )
I have written a script which does a following functions:-
1) Check a area if it is mounted or not
2) If the area is not mounted it will prompt the user to mount the are.
3) Once the area is mounted and the option is given as Y or y
the script continues...
My question is will the below... (2 Replies)
hi,
how can i can pass the value of unixformat to date/time? and how can i retrieve the day/month/year from a date?
thanks a lot for your help
ps:i using php (1 Reply)
I use FreeBSD,and use signal,like follows:
signal(SIGHUP,sig_hup);
signal(SIGIO,sig_io);
when I run call following code,it can run,but I find a puzzled question,it should print some information,such as printf("execute main()") will print execute main(),but in fact,printf fuction print... (2 Replies)
Hello again,
Am having an issue now with getting a simple grep command to work within a function..
The function is as below...
function findRecord() {
output=grep "001" recordDatabase
echo $output
}
At the moment the "001"... (3 Replies)
Hi,
I want to copy a file/directory ( recursively , if needed) and if destination directory does not exist create it ( with parent directory, if needed).
funcopy () {
if ; then
echo "$2 exists , copying files"
cp -r "$1" "$2"
else
echo "Directory does not exist;Create directory"
mkdir... (1 Reply)
Hi All,
I am new to Unix , there i am facing one problem with sleep command. that is ..
in while loop i have defined sleep function ..
my condition is like this
while #i knew this is infinite loop
do
sleep 200
echo "hello "
done.
this condition will never become .. true... (3 Replies)
Hello, and here's my problem:
I can't get my function to do what I want. When I call my function get_from_A_to_F I give it an argument $remainder. I want my function to substitute a number higher than 9 to a specific letter. If the argument is equal to 10 than it should change it to "A".... (8 Replies)
Hi i have a script that check pings and i use flock to so the script wont run
multipul times :
its not the whole script but this is the idea :
(
flock -x -w 3 200 || exit 1
/usr/sbin/fping -c$count -i$interval -a $hosts > $FILE1 2>&1
) 200>/var/lock/.myscript.exclusivelock
now i... (4 Replies)
Hello everyone
I really hope you can help me, I can't continue:
Im on a project to work with my Server.
I wanted to put on my server all data-systems and I did this:
df -h
The output is a string.
How can I turn the string into a table?
Dateisystem Größe Benutzt Verf. Verw% Eingehängt auf... (5 Replies)
Well, guys I saw a question about GOTO for Python.
So this gave me the inspiration to attempt a GOTO function for 'dash', (bash and ksh too).
Machine: MBP OSX 10.14.3, default bash terminal, calling '#!/usr/local/bin/dash'...
This is purely a fun project to see if it is possible in PURE... (3 Replies)
Discussion started by: wisecracker
3 Replies
LEARN ABOUT OPENDARWIN
printenv
PRINTENV(1) BSD General Commands Manual PRINTENV(1)NAME
printenv, env -- print out the environment, set and print environment
SYNOPSIS
printenv [name]
env [-i] [name=value ...] [utility [argument ...]]
DESCRIPTION
The printenv utility prints out the names and values of the variables in the environment, with one name/value pair per line. If name is
specified, only its value is printed.
Some shells may provide a builtin printenv command which is similar or identical to this utility. Consult the builtin(1) manual page.
The env utility executes utility after modifying the environment as specified on the command line. The option name=value specifies an envi-
ronment variable, name, with a value of value.
The options are as follows:
-i Execute the utility with only those environment values specified. The environment inherited by env is ignored completely.
If no utility is specified, env prints out the names and values of the variables in the environment, with one name/value pair per line.
The env utility is sometimes useful with the ``#!'' construct (see execve(2)). The only difference between ``#!/usr/local/bin/foo'' and
``#!/usr/bin/env /usr/local/bin/foo'' is that the latter works even if /usr/local/bin/foo is itself interpreted. Using env this way also
allows one to reference foo without the path, as well as set up the environment as desired.
ENVIRONMENT
The env utility uses the PATH environment variable is used to locate the requested utility if the name contains no '/' characters.
DIAGNOSTICS
The printenv utility exits 0 on success, and >0 if an error occurs.
The env utility exits 0 on success, and >0 if an error occurs. An exit status of 126 indicates utility was found, but could not be executed.
An exit status of 127 indicates utility could not be found.
COMPATIBILITY
The env utility accepts the - option as a synonym for -i.
SEE ALSO csh(1), sh(1), execvp(3), environ(7)STANDARDS
The env utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
HISTORY
The printenv command appeared in 3.0BSD.
BUGS
The env utility doesn't handle utility arguments with equal (``='') signs in their names, for obvious reasons.
BSD June 6, 1993 BSD