10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi
Below script is throwing an error:
repos=root
filename=/home/admin/Desktop/authz
case $repos in
root)
root_folder="\"
do
sed "/$root_folder/a $username = $access" $filename
done
;;
esac
exit 0
Error:
./new1.sh: line 77: syntax error near unexpected token `do' (1 Reply)
Discussion started by: ankur328
1 Replies
2. Shell Programming and Scripting
Hello,
I have another problem with my script. Please accept my apologies, but I am really nooby in sh scripts. I am writing it for first time.
My script:
returned=`tail -50 SapLogs.log | grep -i "Error"`
echo $returned
if ; then
echo "There is no errors in the logs"
fi
And after... (10 Replies)
Discussion started by: jedzio
10 Replies
3. SuSE
Hi,
My program was running for a whole night. after 12 hours i got an error message "Cannot allocate memory" during the shmat commmand. So can you please let me know what could be the reason? is there any solution?
thanks in advance.
Regards,
Mano (5 Replies)
Discussion started by: ManoharanMani
5 Replies
4. Programming
Hi,
I'm using Ubuntu 10.04 on a 64bit machine.
In my shmat() call, I want to assign fixed memory address to shmaddr variable. I have no idea which address value to give. Some where in the net I read we can make use of sysproc info to know the user space addresses, but could not figure out how... (1 Reply)
Discussion started by: sajjar
1 Replies
5. Programming
request_irq always returns EINVAL
What am I doing wrong here ?
int mydrvr_open(struct inode *inode, struct file *filp)
{
int ret;
printk("<1> \nModule Opened!");
//disable_irq(4);
//free_irq(4, NULL);
ret = request_irq(4, &imr_interrupt_handler,IRQF_SHARED,... (0 Replies)
Discussion started by: dragonpoint
0 Replies
6. Programming
I have a process that needs two active connections to the same zone of shared memory simultaneously.
The firs conection works ok, but when i do the second call to shmat it give me error 22 (EINVAL). Only works ok the second call to shmat if i disconnect the first connection (shmdt)
Steps:... (3 Replies)
Discussion started by: dairby
3 Replies
7. AIX
Hi,
I got this error from AIX 4.3.3/db2 7:
* %SHAREMEM-F-SHMAT Error getting PUTPARM shared memory address , shmid=23029 *
* 3630, errno=13
Anybody who know how to fix this?
Thanks in advance,
itik (1 Reply)
Discussion started by: itik
1 Replies
8. Linux
Hi,
I'm developing a data processing pipeline with multiple stages, with data being moved between the stages using shared memory segments. The size of the data is typically of the order of hundreds of megabytes, and there are typically a few tens of main shared memory segments each of size... (2 Replies)
Discussion started by: theicarusagenda
2 Replies
9. Programming
The first shmat in my program cannot fetch the start address of the shared memory.
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
int main(int argc,char *argv) {
int pid;
key_t mykey;
int shmid;
long *shm;
long *shm2;
... (3 Replies)
Discussion started by: yong
3 Replies
10. HP-UX
I have installed an application that runs correctly for root but not other users. The application generates an error that indicates users don't have permission to attach to shared memory. A daemon process creates the shared memory segment. I've checked every permission I can think of but nothing... (2 Replies)
Discussion started by: km4hr
2 Replies
SHMAT(2) BSD System Calls Manual SHMAT(2)
NAME
shmat, shmdt -- attach or detach shared memory
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
void *
shmat(int shmid, const void *addr, int flag);
int
shmdt(const void *addr);
DESCRIPTION
The shmat() system call attaches the shared memory segment identified by shmid to the calling process's address space. The address where the
segment is attached is determined as follows:
o If addr is 0, the segment is attached at an address selected by the kernel.
o If addr is nonzero and SHM_RND is not specified in flag, the segment is attached the specified address.
o If addr is specified and SHM_RND is specified, addr is rounded down to the nearest multiple of SHMLBA.
The shmdt() system call detaches the shared memory segment at the address specified by addr from the calling process's address space.
RETURN VALUES
Upon success, shmat() returns the address where the segment is attached; otherwise, -1 is returned and errno is set to indicate the error.
The shmdt() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate
the error.
ERRORS
The shmat() system call will fail if:
[EINVAL] No shared memory segment was found corresponding to shmid.
[EINVAL] The addr argument was not an acceptable address.
The shmdt() system call will fail if:
[EINVAL] The addr argument does not point to a shared memory segment.
SEE ALSO
shmctl(2), shmget(2)
BSD
August 2, 1995 BSD