03-09-2017
Thanks Corona,
I have created a variable for a structure. And this variable is getting updated.
the code segment region address is assigned to the Variable.
I am surprised why a code segment address is assigned to a local variable.
When this local variable is getting updated its corrupting the code in Code segment, and system boot is failing.
10 More Discussions You Might Find Interesting
1. Programming
I am having strange warnings from gcc compiler, which I don't think should come while cmpiling.
Can anyone help? The warnings are:
- warning: implicit declaration of function 'bzero'
- warning: implicit declaration of function 'inet_addr'
The code is as below:
int main(int argc, char... (2 Replies)
Discussion started by: Ahsan
2 Replies
2. Shell Programming and Scripting
Is it possible to pass a variable name, as a parameter to a function, so it can be created within this function ?
Something like this:
func_uppercase abcdefgh var_name
where the 1st parameter is the string I want to convert and the 2nd is the desired variable name...
$2=`echo "$1" |... (2 Replies)
Discussion started by: 435 Gavea
2 Replies
3. BSD
I am running Open BSD 3.8 (3.5 upgrade) on a Pent Pro. 200, 64 Megs Ram, Nvedia Vanta TNT 16 Megs, Realtech 8139 Nic. When running ifconfig -a I get this error back. I've run searches on google no deal. I can get Stack overflow or psync, but not both. So I would really like to know how to fix it. ... (0 Replies)
Discussion started by: jmcpreach
0 Replies
4. Linux
Hi
I compiled a hello world program on two different 64-bit Linux machines, named quimby and node0331. When I compile on quimby and run on node0331 I get a "Floating exception (core dumped)" error. But if I do it in reverse, things work fine.
Here's my compilation on quimby:
$ uname -a... (3 Replies)
Discussion started by: same1290
3 Replies
5. UNIX for Dummies Questions & Answers
Hi,
I have the following statement which parses a string for me and prints it out:
l_comp="dc000.runksh.test.ksh|
$g_sql/dc0000.runksh_test.sql|new.dat|control.ctl"
echo $l_comp | awk -F"|" '{ for ( i = 1; i <= NF; i++) { print $i; } } '
Rather then printing the data, I would like to... (5 Replies)
Discussion started by: CAGIRL
5 Replies
6. Programming
I have a class called Parsing with the following function. I want to create a wrapper for it, so that I call it using GetReal rather than GetFloat.
Bit confused on how to do this.
class Parsing {
private:
int Length; //
int Ptr; ... (3 Replies)
Discussion started by: kristinu
3 Replies
7. Programming
I have put some yellow color codes and works well.
I call the funstion using
print_usage(stderr, 0);
I would like to know if there is any way, to store the ansi color codes in variables and then call them inside fprintf.
Or have a format followed by the strings I want to output.
... (5 Replies)
Discussion started by: kristinu
5 Replies
8. Solaris
Hello experts,
This issue has kept me busy all day long. It started off with openssl compilation which was giving linking error with following message:
/usr/local/bin/ld: target elf32-sparc not found
collect2: ld returned 1 exit status
I tried every step possible thing that I could think... (2 Replies)
Discussion started by: d_shanke
2 Replies
9. Programming
I hope it's okay to post this here. I'm working on Windows computer but using the Unix-like environment MSYS2 (https://sourceforge.net/projects/msys2).
My problem is that I can't get the compiler to find headers located in /usr/local/include. I am trying to compile libpng which wants the header... (1 Reply)
Discussion started by: AntumDeluge
1 Replies
10. Shell Programming and Scripting
Hi,
If I declare a function inside another function, it overwrites any previously declared function with the same name. This is NOT what I want.
Example:
#!/bin/bash
_test() { echo test; }
_myf() {
# I'm using the same name as the other function.
_test() { echo local test; }... (8 Replies)
Discussion started by: chebarbudo
8 Replies
shmop(2) System Calls Manual shmop(2)
Name
shmop, shmat, shmdt - shared memory operations
Syntax
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
char *shmat (shmid, shmaddr, shmflg)
int shmid;
char *shmaddr;
int shmflg;
int shmdt (shmaddr)
char *shmaddr;
Description
The system call attaches the shared memory segment associated with the shared memory identifier specified by shmid to the data segment of
the calling process. The segment is attached at the address specified by one of the following criteria:
If shmaddr is equal to zero, the segment is attached at the first available address as selected by the system.
If shmaddr is not equal to zero and (shmflg & SHM_RND ) is true, the segment is attached at the address given by (shmaddr- (shmaddr modulus
SHMLBA )).
If shmaddr is not equal to zero and (shmflg & SHM_RND ) is false, the segment is attached at the address given by shmaddr.
The segment is attached for reading if (shmflg & SHM_RDONLY ) is true. Otherwise, it is attached for reading and writing.
The system call detaches from the calling process's data segment the shared memory segment located at the address specified by shmaddr.
Return Values
Upon successful completion, the return values are as follows:
o The system call returns the data segment start address of the attached shared memory segment.
o The system call returns a value of zero (0).
Otherwise, a value of -1 is returned, and errno is set to indicate the error.
Diagnostics
The system call fails and not attach the shared memory segment, if any of the following is true:
[EINVAL] The shmid is not a valid shared memory identifier.
[EACCES] Operation permission is denied to the calling process. For further information, see
[ENOMEM] The available data space is not large enough to accommodate the shared memory segment.
[EINVAL] The shmaddr is not equal to zero, and the value of (shmaddr- (shmaddr modulus SHMLBA )) is an illegal address.
[EINVAL] The shmaddr is not equal to zero, (shmflg & SHM_RND ) is false, and the value of shmaddr is an illegal address.
[EMFILE] The number of shared memory segments attached to the calling process would exceed the system imposed limit.
The fails and does not detach the shared memory segment if:
[EINVAL] The shmaddr is not the data segment start address of a shared memory segment.
See Also
execve(2), exit(2), fork(2), shmctl(2), shmget(2)
shmop(2)