Very Computer

by **fioru..** » Fri, 06 Aug 1993 23:55:36

Hello World !!

I need to lock files, but I use FILE struct instead of int.
the locking() & lockf() system calls use only fildes (open) and not
FILE (fopen).
Can anyone tell me what system call may I use or if I can
transform my FILE pointer into a fildes to use lockf or locking.

Thanks in advance

JL

by **Hammond Eg** » Sat, 07 Aug 1993 00:56:51

>I need to lock files, but I use FILE struct instead of int.
>the locking() & lockf() system calls use only fildes (open) and not
>FILE (fopen).
>Can anyone tell me what system call may I use or if I can
>transform my FILE pointer into a fildes to use lockf or locking.

locking(fileno(file), mode, size);

will work, however, i prefer the fcntl() locking method, myself.
(man fcntl should give you all the*details)

Matt

by **Spencer S** » Sat, 07 Aug 1993 01:04:01

Quote:>I need to lock files, but I use FILE struct instead of int.

[...]

fileno() gives you the file descriptor associated with a FILE *.

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Very Computer

Locking Files with FILE pointers

Locking Files with FILE pointers

Locking Files with FILE pointers

Locking Files with FILE pointers