IPC settings on HP-UX Post: 302634805

10 More Discussions You Might Find Interesting

1. Programming

fork() and IPC

Hey all. I recently ported a multithreaded program from WinNT to LINUX using pthreads. Everything works fine, except that it turns out the drivers for the hardware I'm working with aren't thread safe. So, now I have to find a way to make this multi-process instead of multi-threaded. I just...

2. UNIX for Dummies Questions & Answers

Ipc

I have a parent that is passing data to child A and then child A has to process it and pass to child B. I am able to pass the data to child A but am not able to pass it to child B. Child B seems to only be receiving the last data instead of the whole data. I saw one example in a book but it uses...

3. UNIX for Dummies Questions & Answers

Ipc Details

hai, i am doing my masters degree in computers.please any one tell me about fork(),semaphores,mutex,messaging queues,messaging using pipes ,and msgget(),msgrecv() funtions in ipc programming . i have exam on that i have a book but in that they not given clearly. hope u will ...

4. Programming

[C] Problem with IPC

Hi! I'm trying to write this program: in my intentions it should get a message and send it to a second process (pid_upost), then to a third process (pid1, pid2, pid3, depending on the choice made when a new message is inserted). This program should write the message in a file (message1, message2 or...

5. Programming

IPC with PIPE

Hi guys, I'm new to Linux and Unix I have just simple code . But I don't know why it doesn't work .. But, the outputfile is Blank.. I don't understand why.. Please help me.. Thank you very much P.S: sorry, I don't know how to edit this post clearly.. it's hard to read.. Please try..

6. Solaris

errors on Netra-440: "IPC Warning: ipc: tcp_protocol: bad magic number"

I was asked to look into a problem with a Sun Netra 440 in another department. On the server in question, the relevant 'uname -a' information is, "SunOS host1 5.9 Generic_118558-16 sun4u sparc SUNW,Netra-440". That information aside, while the other admin is logged into the ALOM, these errors are...

7. Programming

IPC Mechanisms

Hi! I wanted to know the advantages / disadvantages of different IPC mechanims such as sockets, pipes (unnamed) , shared memory & message queues. Pipes for example i hear are fast , but are difficult to debug as compared to sockets. Can you guys please name some situations where one is...

8. UNIX for Dummies Questions & Answers

Mach IPC

hey everyone, I'm reading a tutorial on the Mach kernel principles, however, the port and port rights part are kind of confusing to me. I don't know if the book has typos or something but it seems a bit contradictory. It says that "ports, themselves, are not named. It is the port rights that are"...

9. Shell Programming and Scripting

help with IPC + thread

Actually i am thinking of some usefull application that involves both IPC and pthreads.But i am not quite sure what type of application involves both these together :confused:. Anyways i am now working on creating a simple featured file manager that can do the following: Display file name and...

10. UNIX for Beginners Questions & Answers

Questions about IPC

Hello and thanks in advance for any help anyone can offer to help me understand this I'm curious about a 30.000 ft view on how IPC works in Linux between parent-child processes...I understand there's multiple types of IPC's... But I'm currently trying to figure out if parent-child process IPC...

LEARN ABOUT OPENSOLARIS

ipc.h

ipc.h(3HEAD)							      Headers							      ipc.h(3HEAD)

NAME

       ipc.h, ipc - XSI interprocess communication access structure

SYNOPSIS

       #include <sys/ipc.h>

DESCRIPTION

       The <sys/ipc.h> header is used by three mechanisms for interprocess communication (IPC): messages, semaphores, and shared memory. All use a
       common structure type, ipc_perm, to pass information used in determining permission to perform an IPC operation.

       The ipc_perm structure contains the following members:

	 uid_t	uid	/* owner's user ID */
	 gid_t	gid	/* owner's group ID */
	 uid_t	cuid	/* creator's user ID */
	 gid_t	cgid	/* creator's group ID */
	 mode_t mode	/* read/write permission

       The uid_t, gid_t, mode_t, and key_t types are defined as described in <sys/types.h>. See types.h(3HEAD).

       Definitions are provided for the constants listed below.

       Mode bits:

       IPC_CREAT     Create entry if key does not exist.

       IPC_EXCL      Fail if key exists.

       IPC_NOWAIT    Error if request must wait.

       Keys:

       IPC_PRIVATE    Private key.

       Control commands:

       IPC_RMID    Remove identifier.

       IPC_SET	   Set options.

       IPC_STAT    Get options.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ftok(3C), types.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    10 Sep 2004 						      ipc.h(3HEAD)

10 More Discussions You Might Find Interesting

1. Programming

fork() and IPC

Discussion started by: TelePlayer

2. UNIX for Dummies Questions & Answers

Ipc

Discussion started by: scmay

3. UNIX for Dummies Questions & Answers

Ipc Details

Discussion started by: G.Vishnuvardhan

4. Programming

[C] Problem with IPC

Discussion started by: Kaminski