Give us your poor, your tired, your huddled Admins... War Stories Post: 30644

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Top Forums UNIX for Dummies Questions & Answers Give us your poor, your tired, your huddled Admins... War Stories Post 30644 by auswipe on Thursday 24th of October 2002 05:00:54 PM

10-24-2002

Registered User

This is not Unix specific, but the concept is just the same regardless of OS.

Back in my xBase days I was working for a medical software company here in Dallas. I wrote an upgrade install batch file that would pkzip the FoxPro programs, database and back it all up and then delete all the files, re-install the upgrade and then unzip the database, recreate indexes, etc.

I tested the routine time after time and the world was a happy place until I got "The Call".

It seems that while the client had pkzip install on their machine, it wasn't in the path. The backup zip was never created, but the sub-dirs were blown away just the same.

Data was gone. No more, non-existant, poof.

Disaster recovery? Client never even heard of a backup.

The only way that I kept my job was that I spent the entire weekend on the client site manually re-entering data via our application and getting things up and running.

Luckilly for me, it was a slow site and I was able to do all the data entry in a single weekend.

Very, very painful lesson learned. When doing any thing destructive, check, double check, triple check and trust NOTHING.

auswipe

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pthread_kill

PTHREAD_KILL(3) 					     Linux Programmer's Manual						   PTHREAD_KILL(3)

NAME

       pthread_kill - send a signal to a thread

SYNOPSIS

       #include <signal.h>

       int pthread_kill(pthread_t thread, int sig);

       Compile and link with -pthread.

DESCRIPTION

       The  pthread_kill()  function  sends  the  signal  sig to thread, a thread in the same process as the caller.  The signal is asynchronously
       directed to thread.

       If sig is 0, then no signal is sent, but error checking is still performed; this can be used to check for the existence of a thread ID.

RETURN VALUE

       On success, pthread_kill() returns 0; on error, it returns an error number, and no signal is sent.

ERRORS

       EINVAL An invalid signal was specified.

       ESRCH  No thread with the ID thread could be found.

CONFORMING TO

       POSIX.1-2001.

NOTES

       Signal dispositions are process-wide: if a signal handler is installed, the handler will be invoked in the thread thread, but if the dispo-
       sition of the signal is "stop", "continue", or "terminate", this action will affect the whole process.

SEE ALSO

       kill(2), sigaction(2), sigpending(2), pthread_self(3), pthread_sigmask(3), raise(3), pthreads(7), signal(7)

COLOPHON

       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2012-08-19							   PTHREAD_KILL(3)