fcntl and record locking

Hi,

Does file record locking work on CFS with fcntl? Such as the following 
code snippet:

    fls.l_start = scanorig + 
((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
    fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
    fls.l_whence = 0;
    fls.l_type = F_WRLCK;
    /* lock the section of the file */
    if (fcntl(outfd, F_SETLKW, &fls) < 0)
        filerr("lock");
    if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
        filerr("seek");

    ....write out some stuff here...

    fls.l_type = F_UNLCK;
    /* release the lock */
    if (fcntl(outfd, F_SETLKW, &fls) < 0)
        filerr("lock");

Sorry if this is obvious. I am just getting some unexpected behavior 
with the program. Note this occurs after doing a fork().

Thanks,

-Jack

-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction




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