10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by... (4 Replies)
Discussion started by: saurabhkoar
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2. Programming
Hi,all:
I run my program which consists of one kernel module and one user mode process on a dual core server. The problem here is the kernel module consumes 100% of one core while the user mode process only consumes 10% of the other core, is there any solution that I can assign some computing... (1 Reply)
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3. Programming
Hi everyone. I would like to hook a system function (gettimeofday) to modify it. I guess I'll need kernel mode to do that. By the way, how could I do it (c++ or c)?
I want to modify that function for one process which I know the PID. So I need to return my own value for that PID and real value... (29 Replies)
Discussion started by: lilezek
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4. Programming
when transitionaning from user to kernel mode which function copies data from user mode buffer to kernel mode? (5 Replies)
Discussion started by: rupeshkp728
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5. UNIX for Dummies Questions & Answers
hi all,
i want to know y kernel is giving access for multiple users to access a file when one user may be the owner is executing that file. Because other user can manipulate that file when the other user is executing that file, it will give the unexpected result to owner . plz help me... (1 Reply)
Discussion started by: jimmyuk
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6. UNIX for Advanced & Expert Users
Can kernel process access user address space ? (2 Replies)
Discussion started by: subhotech
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7. UNIX for Dummies Questions & Answers
Hi all i have queastion. Can anybody pease help me
what is user mode and kernel mode and the term "De-mountable volumes" means?
Thanks
Palash (2 Replies)
Discussion started by: palash2k
2 Replies
8. HP-UX
Hi,
Please any one can help me to know that how we can restrict a user group to access the kernel at all. (0 Replies)
Discussion started by: harishankar
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9. Programming
Hi all,
I am trying to setup a program to use a device driver and am confusing buffer access between User and Kernel mode. I think all applications running in User space have to communicate with the device drivers using io control calls and then have some functions called back from the driver... (1 Reply)
Discussion started by: Brendan Kennedy
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10. SCO
hi,
I am trying to install sco openserver 5.0.4 on an old system. However, l was not able to proceed after putting the bootstr
l have this panic message of
PANIC: K_trap - kernel mode trap tupe 0x00000006
will someone kindly help to decode this error
kayode (1 Reply)
Discussion started by: kayode
1 Replies
FCLOSE(3) Linux Programmer's Manual FCLOSE(3)
NAME
fclose - close a stream
SYNOPSIS
#include <stdio.h>
int fclose(FILE *fp);
DESCRIPTION
The fclose() function will flushes the stream pointed to by fp (writing any buffered output data using fflush(3)) and closes the underlying
file descriptor.
RETURN VALUE
Upon successful completion 0 is returned. Otherwise, EOF is returned and errno is set to indicate the error. In either case any further
access (including another call to fclose()) to the stream results in undefined behavior.
ERRORS
EBADF The file descriptor underlying fp is not valid.
The fclose() function may also fail and set errno for any of the errors specified for the routines close(2), write(2) or fflush(3).
CONFORMING TO
C89, C99.
NOTES
Note that fclose() only flushes the user space buffers provided by the C library. To ensure that the data is physically stored on disk the
kernel buffers must be flushed too, for example, with sync(2) or fsync(2).
SEE ALSO
close(2), fcloseall(3), fflush(3), fopen(3), setbuf(3)
COLOPHON
This page is part of release 3.25 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/.
GNU
2009-02-23 FCLOSE(3)