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Full Discussion: Strange "getsockopt" Solaris behavior
Top Forums Programming Strange "getsockopt" Solaris behavior Post 302932120 by revolta25 on Monday 19th of January 2015 07:16:39 AM
Old 01-19-2015
First, thanks for your interest

Code:
#include <assert.h>
#include <sys/fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/devpoll.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netinet/in.h>
#include <netinet/ip.h> 
#include <sys/socket.h>
#include <netinet/tcp.h>

int main()
{
    int fd = -1;
    int ret = 0;
    int error_s = 0;
    struct sockaddr_in serv_addr;
    int delay_time = 3000;
    int len_s = sizeof(int);
    int try = 3;
    
    fd = socket(PF_INET, SOCK_STREAM, 0);
    fcntl(fd, F_SETFL, O_NONBLOCK);
    printf("fd=\"%d\" \n", fd);
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(45678);
    serv_addr.sin_addr.s_addr = inet_addr("10.0.0.5");
    
try_connect_again:

    printf("try_connect_again\n");
    printf("attempt left %d ...\n", try);
    if (!try)
        goto fin;
        
    usleep(2000);
    ret = connect(fd, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr_in));
    printf("connect ret=%d, errno=%d\n", ret, errno);
    
    if (errno == EINPROGRESS)
    {
        do
        {
            struct pollfd fds;

            fds.fd = fd;
            fds.events = POLLIN | POLLOUT;
            ret = poll(&fds, 1, delay_time);
            
            if (ret == -1) //poll error
            {
                goto fin;
            }
        }
        while (!ret);
        
        if (ret)
        {
            ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error_s, &len_s);
            printf("getsockopt, ret=%d, error_s=%d \n", ret, error_s);
            if (error_s == 0)
                printf("connected\n");
            else
            {
                try--;
                goto try_connect_again;
            }
        }
        else if (ret == 0)
        {
            try--;
            goto try_connect_again;
        }
    }

fin:
    printf("end\n");
    return 0;
}

gcc -lsocket -lresolv -lnsl -g -o test1 test1.c

Above code generate following output:

Quote:
fd="3"
try_connect_again
attempt left 3 ...
connect ret=-1, errno=150
getsockopt, ret=0, error_s=146
try_connect_again
attempt left 2 ...
connect ret=-1, errno=150
getsockopt, ret=0, error_s=0
I can't find the reason, why getsockopt works different during second attempt.
 

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LEARN ABOUT CENTOS

papi_remove_event

PAPI_remove_event(3)						       PAPI						      PAPI_remove_event(3)

NAME

       PAPI_remove_event -

       removes a hardware event from a PAPI event set.

SYNOPSIS

Detailed Description
       A hardware event can be either a PAPI Preset or a native hardware
       event code.  For a list of PAPI preset events, see PAPI_presets or
       run the papi_avail utility in the PAPI distribution.  PAPI Presets
       can be passed to PAPI_query_event to see if they exist on the
       underlying architecture.  For a list of native events available on
       the current platform, run papi_native_avail in the PAPI distribution.

       @par C Interface:
       int PAPI_remove_event( int  EventSet, int  EventCode );

       @param[in] EventSet
	  -- an integer handle for a PAPI event set as created
		by PAPI_create_eventset
       @param[in] EventCode
	  -- a defined event such as PAPI_TOT_INS or a native event.

       @retval PAPI_OK
	   Everything worked.
       @retval PAPI_EINVAL
	   One or more of the arguments is invalid.
       @retval PAPI_ENOEVST
	   The EventSet specified does not exist.
       @retval PAPI_EISRUN
	   The EventSet is currently counting events.
       @retval PAPI_ECNFLCT
	   The underlying counter hardware can not count this
		  event and other events in the EventSet simultaneously.
       @retval PAPI_ENOEVNT
	   The PAPI preset is not available on the underlying hardware.

       @par Example:

       *   int EventSet = PAPI_NULL;
       *   int ret;
       *
       *   // Create an empty EventSet
       *   ret = PAPI_create_eventset(&EventSet);
       *   if (ret != PAPI_OK) handle_error(ret);
       *
       *   // Add Total Instructions Executed to our EventSet
       *   ret = PAPI_add_event(EventSet, PAPI_TOT_INS);
       *   if (ret != PAPI_OK) handle_error(ret);
       *
       *   // Start counting
       *   ret = PAPI_start(EventSet);
       *   if (ret != PAPI_OK) handle_error(ret);
       *
       *   // Stop counting, ignore values
       *   ret = PAPI_stop(EventSet, NULL);
       *   if (ret != PAPI_OK) handle_error(ret);
       *
       *   // Remove event
       *   ret = PAPI_remove_event(EventSet, PAPI_TOT_INS);
       *   if (ret != PAPI_OK) handle_error(ret);
       *

       See Also:
	   PAPI_cleanup_eventset

	   PAPI_destroy_eventset

	   PAPI_event_name_to_code

	   PAPI_presets

	   PAPI_add_event

	   PAPI_add_events

Author
       Generated automatically by Doxygen for PAPI from the source code.

Version 5.2.0.0 						  Tue Jun 17 2014					      PAPI_remove_event(3)
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