Linux pause command not on wiki.linuxquestions.org/wiki/P_commands

JHMC · 12-17-2007, 02:43 PM

I have discovered the 'pause' command does not exist on my system.
It is also not listed under the wiki.linuxquestions.org/wiki/P_commands. My operating system is essentially that listed in LFS 6.2 and BLFS 6.2. the kernel is 2.6.16.27. What package normally would provide the utility?

Thanks
Jim McConville

colucix · 12-17-2007, 03:12 PM

I have never heard about it. If a pause command is meant to sleep a certain amount of time before executing the next statement in a script, this is the command

Code:

sleep

if it is meant to pause the execution of a script waiting for user input, this is a work for

Code:

read -p "Press enter to continue... "

Pause in a *nix system is a C function declared in the unistd.h header. Bye.

JHMC · 12-17-2007, 04:37 PM

Quote:

Originally Posted by colucix

I have never heard about it. If a pause command is meant to sleep a certain amount of time before executing the next statement in a script, this is the command

Code:

sleep

if it is meant to pause the execution of a script waiting for user input, this is a work for

Code:

read -p "Press enter to continue... "

Pause in a *nix system is a C function declared in the unistd.h header. Bye.

'read' is also not a command on my system. It is also declared in the unistd.h header. This header is is provided in the Linux-Libc-Headers package but apparently the declarations within unistd.h are not compiled as commands.

colucix · 12-17-2007, 05:31 PM

Quote:

Originally Posted by JHMC

'read' is also not a command on my system. It is also declared in the unistd.h header. This header is is provided in the Linux-Libc-Headers package but apparently the declarations within unistd.h are not compiled as commands.

read is a builtin command in sh, bash, ksh. In C-like shells a method to read a line of input is

Code:

set variable  =  $<

On my system the header unistd.h is mainly provided from the glibc package, that are the standard C libraries. What you're referring to are the kernel headers which basically provide definitions of the system calls. Anyway, returning to your original question, I don't think you will ever find a package providing a "pause" command, but maybe "sleep" is what you're looking for. Or, if you're experienced in C programming, you may build your customized "pause" command!

JHMC · 12-18-2007, 11:56 AM

Quote:

Originally Posted by colucix

read is a builtin command in sh, bash, ksh. In C-like shells a method to read a line of input is

Code:

set variable  =  $<

On my system the header unistd.h is mainly provided from the glibc package, that are the standard C libraries. What you're referring to are the kernel headers which basically provide definitions of the system calls. Anyway, returning to your original question, I don't think you will ever find a package providing a "pause" command, but maybe "sleep" is what you're looking for. Or, if you're experienced in C programming, you may build your customized "pause" command!

Thank you for your comments.
I can use the 'read -p "Press Enter to continue" ' in the bash environment for my needs.

Please close the inquiry.
Thanks,
Jim McConville