8 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Dear Experts,
I am creating a shell script (A) which is menu driven and in turn calls another shell scripts (X) depending on the selection. X has a list of commands which runs batch jobs in auto mode.
Content of X
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2. Shell Programming and Scripting
This is a wrapper I use to play media files. If I quit I can restart, a big plus.
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3. Shell Programming and Scripting
Searched here and google and couldn't find a viable solution. Is there a way to transfer a file with curl and have it automatically attempt to resume it if there's an error, broken pipe, interruption, etc?
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7. Shell Programming and Scripting
Hello,
I have a process running, for example a "top".
I send it a signal to stop it
kill -s SIGSTOP 3423
It works, but when I want to resume it by
kill -s SIGCONT 3423
It does not work.
Help me please.....
I have Fedora Core 4.
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8. UNIX for Advanced & Expert Users
I have a system mount between two servers , but sometimes the connection will be broken when the unstable network or reboot the server , then the mount will not be resumed , even I add the mount connection at /etc/inittab , I still found the mount connection is unstable , could suggest how can I... (2 Replies)
Discussion started by: ust
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cpr(7) Device and Network Interfaces cpr(7)
NAME
cpr - Suspend and resume module
SYNOPSIS
/platform/'uname -m'/kernel/misc/cpr
DESCRIPTION
The cpr module is a loadable module used to suspend and resume the entire system. You may wish to suspend a system to save power or to
power off temporarily for transport. The cpr module should not be used in place of a normal shutdown when performing any hardware reconfig-
uration or replacement. In order for the resume operation to succeed, it is important that the hardware configuration remain the same. When
the system is suspended, the entire system state is preserved in non-volatile storage until a resume operation is conducted.
dtpower(1M) or power.conf(4) are used to configure the suspend-resume feature.
The speed of suspend and resume operations can range from 15 seconds to several minutes, depending on the system speed, memory size, and
load.
During resume operation, the SIGTHAW signal is sent to all processes to allow them to do any special processing in response to suspend-
resume operation. Normally applications are not required to do any special processing because of suspend-resume, but some specialized pro-
cesses can use SIGTHAW to restore the state prior to suspend. For example, X can refresh the screen in response to SIGTHAW.
In some cases the cpr module may be unable to perform the suspend operation. If a system contains additional devices outside the standard
shipped configuration, it is possible that device drivers for these additional devices might not support suspend-resume operations. In
this case, the suspend fails and an error message is displayed. These devices must be removed or their device drivers unloaded for the
suspend operation to succeed. Contact the device manufacturer to obtain a new version of device driver that supports suspend-resume.
A suspend may also fail when devices or processes are performing critical or time-sensitive operations (such as realtime operations). The
system will remain in its current running state. Messages reporting the failure will be displayed on the console and status returned to the
caller. Once the system is successfully suspended the resume operation will succeed, barring external influences such as a hardware recon-
figuration.
Some network-based applications may fail across a suspend and resume
cycle. This largely depends on the underlying network protocol and the applications involved. In general, applications that retry and
automatically reestablish connections will continue to operate transparently on a resume operation; those applications that do not will
likely fail.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcpr |
+-----------------------------+-----------------------------+
|Interface stability |Unstable |
+-----------------------------+-----------------------------+
SEE ALSO
dtpower(1M) (OpenWindows Reference Manual), pmconfig(1M), uadmin(1M), uadmin(2), power.conf(4), attributes(5)
Using Power Management
Writing Device Drivers
NOTES
Certain device operations such as tape and floppy disk activities are not resumable due to the nature of removable media. These activities
are detected at suspend time, and must be stopped before the suspend operation will complete successfully.
Suspend-resume is currently supported only on a limited set of hardware platforms. Please see the book Using Power Management for a com-
plete list of platforms that support system Power Management. See uname(2) to programatically determine if the machine supports suspend-
resume.
SunOS 5.10 7 May 2001 cpr(7)
