Sponsored Content
Full Discussion: mmap failed
Operating Systems HP-UX mmap failed Post 302135315 by jim mcnamara on Friday 7th of September 2007 03:06:10 PM
Old 09-07-2007
Are the failing mmap calls with/without MAP_FIXED?
 

10 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

mmap

Hello. I'm writing some random access i/o software on Solaris 8 using mmap64 to memory map large files (my test file is ~25 GB). The abbreviated code fragment is: fd = open(cbuf,O_RDONLY|O_LARGEFILE); struct stat statbuf; fstat(fd,&statbuf); off_t len =... (0 Replies)
Discussion started by: gusm
0 Replies

2. UNIX for Advanced & Expert Users

mmap and select

I'm using select() to monitor multiple file descriptors (inet sockets) in application. But this application must also collaborate with other applications on the same host via shared memory (mmap'ed file) due to performance reasons. How can I become notification that mmaped memory is changed or... (1 Reply)
Discussion started by: Hitori
1 Replies

3. Solaris

mmap() on 64 bit m/c

Dear Experts, i have a problem related to mmap(), when i run my program on sun for 64 bit which is throwing SIGBUS when it encounters mmap() function, what is the reason how to resolve this one, because it is working for 32 bit. with regards, vidya. (2 Replies)
Discussion started by: vin_pll
2 Replies

4. UNIX for Dummies Questions & Answers

mmap()

how to use mmap() to map a file to memory space. Do you have any simple program???? Because I have to implement lot of concepts into it. (3 Replies)
Discussion started by: gokult
3 Replies

5. Programming

mmap()

how to use mmap() to map a file to memory space. Do you have any simple program???? Because I have to implement lot of concepts into it. (5 Replies)
Discussion started by: gokult
5 Replies

6. Homework & Coursework Questions

mmap

Descriptions: Develop a program that uses mmap() to map a file to memory space. Prepare such a file by yourself and do the follows. <LI class=MsoNormal>Display the content of the file after mapping; <LI class=MsoNormal>Output how many digits included in the file; <LI class=MsoNormal>Replace... (1 Reply)
Discussion started by: gokult
1 Replies

7. Programming

mmap

hai, How do we map 'n' number of files into memory by using mmap system call?? Thanks in advance...... (5 Replies)
Discussion started by: andrew.paul
5 Replies

8. UNIX for Advanced & Expert Users

Regarding MMAP, MLOCK etc..

Hi I want to lock or prevent a portion of memory which I allocated. So I tried MLOCK, MPROTECT and some like this. But all these functions works only on page border. Can I know why that so. Is that possible to protect a portion of memory which is in middle of the page. Example. int A; ... (1 Reply)
Discussion started by: jionnet
1 Replies

9. Emergency UNIX and Linux Support

mmap

I want to know whether this is possile or ever been tried out. I want to obtain a chuck of memory using mmap() I do it so : n = mmap(0, 8000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); And hold on to that memory, when a process requests for memory, some memory is... (2 Replies)
Discussion started by: xerox
2 Replies

10. BSD

Mmap source

I'm new to kernels and C, and I am tinkering around trying to understand OpenBSD's secure memory management. I'm stumped on a couple points. I've read up on malloc() which was apparently modified years ago to allocate memory using mmap. First question, that would be this here, right? ... (4 Replies)
Discussion started by: dcicc
4 Replies
mman.h(3HEAD)							      Headers							     mman.h(3HEAD)

NAME
mman.h, mman - memory management declarations SYNOPSIS
#include <sys/mman.h> DESCRIPTION
The <sys/mman.h> header supports the following options: o the Memory Mapped Files option o the Shared Memory Objects option o the Process Memory Locking option o the Memory Protection option o the Synchronized Input and Output option For Memory Mapped Files and Shared Memory Objects options, the following protection options are defined: PROT_READ Page can be read. PROT_WRITE Page can be written. PROT_EXEC Page can be executed. PROT_NONE Page cannot be accessed. The following flag options are defined: MAP_SHARED Share changes. MAP_PRIVATE Changes are private. MAP_FIXED Interpret addr exactly. The flags immediately following are defined for msync(). See msync(3C). MS_ASYNC Perform asynchronous writes. MS_SYNC Perform synchronous writes. MS_INVALIDATE Invalidate mappings. The symbolic constants immediately following are defined for the mlockall() function. See mlockall(3C). MCL_CURRENT Lock currently mapped pages. MCL_FUTURE Lock pages that become mapped. The symbolic constant MAP_FAILED is defined to indicate a failure from the mmap() function. See mmap(2). The mode_t, off_t, and size_t types are be defined as described in <sys/types.h>. See types(3HEAD). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
mmap(2), mprotect(2), munmap(2), madvise(3C), mlock(3C), mlockall(3C), msync(3C), shm_open(3RT), shm_unlink(3RT), attributes(5), stan- dards(5) SunOS 5.10 10 Sep 2004 mman.h(3HEAD)
All times are GMT -4. The time now is 09:09 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy