Finally, I found the problem, it is caused by use of select().
And the error message is "too many open file descriptors"; Besides, I used "netstat -an" to check the network status, I saw a lot of ESTABLISHED connections and can't release.
But I always use a close() after the descriptor completed. Why this problem happens in my program?
Without digging deeper in your code, the first thoughts that come to my mind:
- How many simultaneous client connection do you have?
- What are your ulimits?
HTH, Loïc
I have written a program which takes a directory as command line arguments and displays all the dir and files in it.
I don't know why I have a problem with the /etc directory.It displays all the directories and files untill it reaches a sub directory called peers which is in /etc/ppp/peers.the... (4 Replies)
ive written my code in C for implementation of a simple lexical analyser using singly linked list hence am making use of dynamic allocation,but when run in linux it gives a segmentation fault is it cause of the malloc function that ive made use of????any suggestions as to what i could do???
thank... (8 Replies)
Hi ,
During execution a backup binary i get following error
"Program error 11 (Segmentation fault), saving core file in '/usr/datatools"
Riyaz (2 Replies)
If I do this.
Assume
struct life
{
char *nolife;
}
struct life **life;
// malloc initialization & everything
if(life->nolife == 0)
Would I get error at life->nolife if it is equal to 0.
wrong accession? (3 Replies)
This code is causing a segmentation fault and I can't figure out why. I'm new to UNIX and I need to learn how to avoid this segmentation fault thing. Thank you so much. Thanks also for the great answers to my last post.:):b:
int main()
{
mysqlpp::Connection conn(false);
if... (3 Replies)
i have this code
int already_there(char *client_names, char *username) {
int i;
for(i = 0; i<NUM; i++) {
printf("HERE\n");
if (strcmp(client_names, username)==0) return(1);
}
return(0);
}
and i get a segmentation fault, whats wrong here? (7 Replies)
I use a binary name (ie polo) it gets some parameter , so for debugging normally i do this :
i wrote script for watchdog my app (polo) and check every second if it's not running then start it , the problem is , if my app , remain in state of segmentation fault for a while (ie 15 ... (6 Replies)
I keep getting this fault on a lot of the codes I write, I'm not exactly sure why so I'd really appreciate it if someone could explain the idea to me.
For example this code
#include <stdio.h>
main()
{
unsigned long a=0;
unsigned long b=0;
int z;
{
printf("Enter two... (2 Replies)
Oddities with gcc, 2.95.3 for the AMIGA and 4.2.1 for MY current OSX 10.14.1...
I am creating a basic calculator for the AMIGA ADE *NIX emulator in C as it does not have one.
Below are two very condensed snippets of which I have added the results inside the each code section.
IMPORTANT!... (11 Replies)
Discussion started by: wisecracker
11 Replies
LEARN ABOUT SUNOS
ulimit
ulimit(2) System Calls ulimit(2)NAME
ulimit - get and set process limits
SYNOPSIS
#include <ulimit.h>
long ulimit(int cmd, /* newlimit */...);
DESCRIPTION
The ulimit() function provides for control over process limits. It is effective in limiting the growth of regular files. Pipes are limited
to PIPE_MAX bytes.
The cmd values, defined in <ulimit.h>, include:
UL_GETFSIZE Return the soft file size limit of the process. The limit is in units of 512-byte blocks and is inherited by child pro-
cesses. Files of any size can be read. The return value is the integer part of the soft file size limit divided by 512. If
the result cannot be represented as a long int, the result is unspecified.
UL_SETFSIZE Set the hard and soft file size limits for output operations of the process to the value of the second argument, taken as a
long int. Any process may decrease its own hard limit, but only a process with appropriate privileges may increase the
limit. The new file size limit is returned. The hard and soft file size limits are set to the specified value multiplied by
512. If the result would overflow an rlimit_t, the actual value set is unspecified.
UL_GMEMLIM Get the maximum possible break value (see brk(2)).
UL_GDESLIM Get the current value of the maximum number of open files per process configured in the system.
RETURN VALUES
Upon successful completion, ulimit() returns the value of the requested limit. Otherwise, -1 is returned, the limit is not changed, and
errno is set to indicate the error.
ERRORS
The ulimit() function will fail if:
EINVAL The cmd argument is not valid.
EPERM A process that has not asserted {PRIV_SYS_RESOURCE} in its effective set is trying to increase its file size limit.
USAGE
Since all return values are permissible in a successful situation, an application wishing to check for error situations should set errno to
0, then call ulimit(), and if it returns -1, check if errno is non-zero.
The getrlimit() and setrlimit() functions provide a more general interface for controlling process limits, and are preferred over ulimit().
See getrlimit(2).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO brk(2), getrlimit(2), write(2), attributes(5), privileges(5), standards(5)SunOS 5.10 1 Feb 2003 ulimit(2)