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From: clj@astro.ocis.temple.edu (Cheng Li Jian)
Newsgroups: comp.unix.bsd
Subject: Trouble with flock
Message-ID: <1993Sep23.054830.29818@cronkite.ocis.temple.edu>
Date: 23 Sep 93 05:48:30 GMT
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Organization: Temple University
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Hi,
I have a trouble with flock.
I am doing some interprocessing work. After tracing the
problem, I find out problem it is following:
flock always return -1(fail lock) instead of 0, I think j
should equal to 0,(even I run this process along, j always
equal to -1, why?)
main()
{
FILE *fp;
int j;
if ((fp=fopen("buffer","w+"))==NULL) {
printf('Can not open buffer file, exit!');
exit(0);
}
j=flock(fp,LOCK_EX|LOCK_NB);
}