You know I don't ever FD_ZERO anything. But I do FD_CLR stuff. How should I FD_ZERO stuff?
FD_CLR is in the loop below:
Also when there is only one user and it aborts, the command list displays:
And when there are two users and it aborts, the command list displays:
Both of the bottom code are kind of the two loops I posted. You could pretty much copy the main and run it if you comment out a few lines that it is dependent on.
---------- Post updated at 10:43 PM ---------- Previous update was at 10:26 PM ----------
Alright I wanna add that I do FD_ZERO like this before my infinity loop:
Requirements:
A server program should read a file and send the message to the client . if the file is not there, then switch to the receive part of the same program and receive any messages from the socket. If no messages to receive then switch to send part of the program to... (2 Replies)
I ran degugger in C++ and the followings are the message I got:
Program received signal SIGABRT, Aborted.
0x002a57a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) info s
#0 0x002a57a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x002e97f5 in raise () from /lib/tls/libc.so.6... (1 Reply)
Dear all,
I used debugger from C++ and these are the message I got:
Program received signal SIGSEGV, Segmentation fault.
0x00323fc0 in free () from /lib/tls/libc.so.6
(gdb) info s
#0 0x00323fc0 in free () from /lib/tls/libc.so.6
#1 0x00794fa1 in operator delete () from... (5 Replies)
Hi,
I would like to write a program to receive the GPS data and then send the data via network to other program.
All of the program is not write yet(include host and sender)
All of the server OS is unix or linux
Could you mind to give me some idea to do this?
Thanks so much!
Ken
... (2 Replies)
Hello,
One of our customer is getting segmentation fault when he runs his shell script which invokes our executable on AIX 6.1.
On AIX 5.3, there were no issues.
Here is the truss output.
811242: __loadx(0x0A040000, 0xF0D3A26C, 0x00000000, 0x00000009, 0x00000000) = 0xF026E884... (0 Replies)
Hi to all,
i am trying to make mksysb backup of a NIM client machine from NIM master and while i am reading that the backup is done successfully i get an error message below and it doesnt exit the smit screen. also the status of the command appears to be running.
is there anybody who knows why... (3 Replies)
I am making a command line program in C using XCode. When running the program, it initially does what it is supposed to do (asks me for a file path). However, when I type in a valid and existing file path, it gives me the following error:
Program received signal: “EXC_BAD_ACCESS”.... (6 Replies)
in a single main() function,so need signal handling. Use Posix Message Queue IPC mechanism , can ignore the priority and other linked list message,to implement the scenario:
client:Knock Knock
server:who's there
client: Eric
Server:Eric,Welcome.
client:exit
all process terminated
... (1 Reply)
hi all
I am getting following error while taking backup
using the command
ufsdump 0ubf 512 /dev/rmt/0cbn /database/backup2/rman_backup/level0 >> /database/backup2/backup_tape/level0_rman_06sep12 2>&1;
from the log i got the error
bash# tail -f level0_rman_06sep12
DUMP: Date of... (3 Replies)
I am trying to learn C and while trying out some code, the program is getting aborted while I am calling free().
Here is the code:
#include <stdlib.h>
#include <stdio.h>
void print_by_ptr(char **str) {
printf("<%s>\n",*str);
printf("Now I am modifying the str.\n");
*str =... (3 Replies)
Discussion started by: chacko193
3 Replies
LEARN ABOUT DEBIAN
xpamainloop
xpamainloop(3) SAORD Documentation xpamainloop(3)NAME
XPAMainLoop - optional main loop for XPA
SYNOPSIS
#include <xpa.h>
void XPAMainLoop();
DESCRIPTION
Once XPA access points have been defined, a program must enter an event loop to watch for requests from external programs. This can be done
in a variety of ways, depending on whether the event loop is processing events other than XPA events. In cases where there are no non-XPA
events to be processed, the program can simply call the XPAMainLoop() event loop. This loop is implemented essentially as follows (error
checking is simplified in this example):
FD_ZERO(&readfds);
while( XPAAddSelect(NULL, &readfds) ){
if( sgot = select(swidth, &readfds, NULL, NULL, NULL) >0 )
XPAProcessSelect(&readfds, 0);
else
break;
FD_ZERO(&readfds);
}
The XPAAddSelect() routine sets up the select() readfds variable so that select() will wait for I/O on all the active XPA channels. It
returns the number of XPAs that are active; the loop will end when there are no active XPAs. The standard select() routine is called to
wait for an external I/O request. Since no timeout struct is passed in argument 5, the select() call hangs until there is an external
request. When an external I/O request is made, the XPAProcessSelect() routine is executed to process the pending requests. In this rou-
tine, the maxreq value determines how many requests will be processed: if maxreq <=0, then all currently pending requests will be pro-
cessed. Otherwise, up to maxreq requests will be processed. (The most usual values for maxreq is 0 to process all requests.)
If a program has its own Unix select() loop, then XPA access points can be added to it by using a variation of the standard XPAMainLoop:
XPAAddSelect(xpa, &readfds);
[app-specific ...]
if( select(width, &readfds, ...) ){
XPAProcessSelect(&readfds, maxreq);
[app-specific ...]
FD_ZERO(&readfds);
}
XPAAddSelect() is called before select() to add the access points. If the first argument is NULL, then all active XPA access points are
added. Otherwise only the specified access point is added. After select() is called, the XPAProcessSelect() routine can be called to
process XPA requests. Once again, the maxreq value determines how many requests will be processed: if maxreq <=0, then all currently pend-
ing requests will be processed. Otherwise, up to maxreq requests will be processed.
XPA access points can be added to Xt event loops (using XtAppMainLoop()) and Tcl/Tk event loops (using vwait and the Tk loop). When using
XPA with these event loops, you only need to call:
int XPAXtAddInput(XtAppContext app, XPA xpa)
or
int XPATclAddInput(XPA xpa)
respectively before entering the loop.
SEE ALSO
See xpa(7) for a list of XPA help pages
version 2.1.14 June 7, 2012 xpamainloop(3)