Re: Multiple Instances of program

From: SM Ryan (wyrmwif_at_tango-sierra-oscar-foxtrot-tango.fake.org)
Date: 11/10/05

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    Date: Thu, 10 Nov 2005 18:07:32 -0000

    "Mavinkuli" <boss_bhat@yahoo.co.in> wrote:
    # I have SunOS brahma 5.8 box
    # But when I compile this fix it says LOCK_EX and LOCK_NB are undefined.
    # I have even included the file sys/file.h but still it fails to compile

    There are also fcntl and perhaps lockf file locks if flock
    is not implemented on your system. fcntl locks have similar
    properties to flock.

            #include <fcntl.h>

            struct flock l = {0,0,0,F_WRLCK,SEEK_SET};
            int lockfd = open(lockpath,O_RDWR|O_CREAT);
            if (fcntl(lockfd,F_SETLK,&l)==0) {
                    acquired lock
            }else if (errno==EACCES) {
                    another process has the lock
            }else {
                    oops
            } 

    --
SM Ryan http://www.rawbw.com/~wyrmwif/
Who's leading this mob?
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