[Linux-ia64] problem in sigtimedwait

[Linux-ia64] problem in sigtimedwait

[kumar]

All,

Do IA64 Linux release have complete support for RT Signals.
Or which version has full support for RT signals.

The problem we faced is that the :
sigtimedwait call does not return siginfo_t's si_fd value. 

Any fix or recommendations.

regards
Kumar.

Re: [Linux-ia64] problem in sigtimedwait

[David Mosberger]

>>>>> On Wed, 19 Jun 2002 16:31:30 +0530, "kumar" <kumareshind@gmx.net> said:

  Kumar> All, Do IA64 Linux release have complete support for RT
  Kumar> Signals.  Or which version has full support for RT signals.

There have not been any recent changes in this area.

  Kumar> The problem we faced is that the : sigtimedwait call does not
  Kumar> return siginfo_t's si_fd value.

Do you have a minimal test program that reproduces the issue?

	--david

Re: [Linux-ia64] problem in sigtimedwait

[kumar]

[-- Attachment #1: Type: text/plain, Size: 1030 bytes --]

Hello david,
I have attached the test program as you asked for testing "sigtimedwait".
whether it returns proper "si_fd" value.
Please try with this.

I have tested by the following way:
1)Compiled and run the program
2)In the other terminal, i have run the command "telnet localhost 5001".
3)You can view the results in the terminal where the test program is
running.

Thanks in advance.
Kumar.

> >>>>> On Wed, 19 Jun 2002 16:31:30 +0530, "kumar" <kumareshind@gmx.net>
said:
>
>   Kumar> All, Do IA64 Linux release have complete support for RT
>   Kumar> Signals.  Or which version has full support for RT signals.
>
> There have not been any recent changes in this area.
>
>   Kumar> The problem we faced is that the : sigtimedwait call does not
>   Kumar> return siginfo_t's si_fd value.
>
> Do you have a minimal test program that reproduces the issue?
>
> --david
>
> _______________________________________________
> Linux-IA64 mailing list
> Linux-IA64@linuxia64.org
> http://lists.linuxia64.org/lists/listinfo/linux-ia64

[-- Attachment #2: rtsignaltest.c --]
[-- Type: application/octet-stream, Size: 3439 bytes --]


#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>

static sigset_t signalset;
static siginfo_t siginfo;

#define F_SETSIG 10

void setCloseOnExec(int fd) {
    int flags;
    int dummy = 0;
    if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) {
	printf("FD %d: fcntl F_GETFL: %s\n", fd, strerror(errno));
	return;
    }
    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
	printf("FD %d: set close-on-exec failed: %s\n", fd, strerror(errno));
}


void enable_rt_signal(int fd) {
  int flags;
  int err = 0;

  flags = fcntl(fd, F_GETFL, err);
  if (flags < 0) {
    printf("enable_realtime_signals: Error getting flags FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETFL, flags | O_ASYNC | O_RDWR);
  if (err < 0) { 
    printf("enable_realtime_signals: Error setting ASYNC FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETSIG, SIGRTMIN+10);
  if (err < 0) {
    printf("enable_realtime_signals: Error setting signum FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETOWN, getpid());
  if (err < 0) {
    printf("enable_realtime_signals: Error setting pid FD %d\n", fd);
    return;
  }
}


void
commSetNonBlocking(int fd)
{
    int flags;
    int dummy = 0;

    if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) {
      printf("FD %d: fcntl F_GETFL: %s\n", fd, strerror(errno));
      return;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
      printf("commSetNonBlocking: FD %d: %s\n", fd, strerror(errno));
      return;
    }
}



int main() {
  int listenfd;
  int fd;
  int ret_val;
  struct sockaddr_in addr;
  short port = 5001;

  sigemptyset(&signalset);
  sigaddset(&signalset, SIGRTMIN+10);
  sigaddset(&signalset, SIGIO);
  sigprocmask(SIG_BLOCK, &signalset, NULL);

  fd = socket(AF_INET, SOCK_STREAM, 0);
  if(fd <= 0) {
    printf("Socket creation failed : %s\n",strerror(errno));
    return 1;
  }
 
  /* Set signal, pid etc */

  setCloseOnExec(fd);
  commSetNonBlocking(fd);  
  enable_rt_signal(fd);

  /* Bind to port 5001 */

  memset(&addr, '\0', sizeof(addr));
  addr.sin_family = AF_INET;
  addr.sin_port = htons(port);
  // addr.sin_addr = in_addr;
   
  ret_val = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
  if(ret_val < 0) { 
    printf("Bind failed : %s\n",strerror(errno));
    return 1;
  }  

  /* Listen */
 
  ret_val = listen(fd, 5);
  if(ret_val < 0) { 
    printf("Listen failed : %s\n",strerror(errno));
    return 1;
  }
  
  printf("Listening FD is %d\n",fd);

  /* we will be here ..always */

  while(1) {
    int signum;
    struct timespec ts;
    ts.tv_sec = 2;
    ts.tv_nsec = (100 % 1000) * 1000;
    
    signum = sigtimedwait(&signalset, &siginfo, &ts);

    if(signum == -1 && errno == EINTR) {
      printf("Timeout\n");
      continue;
    }

    printf("Signum : %d : %s\n",signum,strerror(errno));

    if(signum != SIGRTMIN+10) {
      printf("Unknown signal \n");      
    }

    if(signum == SIGRTMIN+10) {
      /* Print siginfo values */
      printf("Signum : %d\n",siginfo.si_signo);
      printf("FD     : %d\n",siginfo.si_fd);
      printf("BAND   : %d\n",siginfo.si_band);
      printf("Code   : %d\n",siginfo.si_code);
    }
  }
  return 0;
}

Fw: [Linux-ia64] problem in sigtimedwait

[kumar]

[-- Attachment #1: Type: text/plain, Size: 1131 bytes --]

If somebody else have some idea, please post it asap.

Hello david,
I have attached the test program as you asked for testing
"sigtimedwait".whether it returns proper "si_fd" value.
Please try with this.

 I have tested by the following way:
 1)Compiled and run the program
 2)In the other terminal, i have run the command "telnet localhost 5001".
 3)You can view the results in the terminal where the test program is
 running.

 Thanks in advance.
 Kumar.

> > >>>>> On Wed, 19 Jun 2002 16:31:30 +0530, "kumar" <kumareshind@gmx.net>
> said:
> >
> >   Kumar> All, Do IA64 Linux release have complete support for RT
> >   Kumar> Signals.  Or which version has full support for RT signals.
> >
> > There have not been any recent changes in this area.
> >
> >   Kumar> The problem we faced is that the : sigtimedwait call does not
> >   Kumar> return siginfo_t's si_fd value.
> >
> > Do you have a minimal test program that reproduces the issue?
> >
> > --david
> >
> > _______________________________________________
> > Linux-IA64 mailing list
> > Linux-IA64@linuxia64.org
> > http://lists.linuxia64.org/lists/listinfo/linux-ia64
>

[-- Attachment #2: rtsignaltest.c --]
[-- Type: application/octet-stream, Size: 3439 bytes --]


#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>

static sigset_t signalset;
static siginfo_t siginfo;

#define F_SETSIG 10

void setCloseOnExec(int fd) {
    int flags;
    int dummy = 0;
    if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) {
	printf("FD %d: fcntl F_GETFL: %s\n", fd, strerror(errno));
	return;
    }
    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
	printf("FD %d: set close-on-exec failed: %s\n", fd, strerror(errno));
}


void enable_rt_signal(int fd) {
  int flags;
  int err = 0;

  flags = fcntl(fd, F_GETFL, err);
  if (flags < 0) {
    printf("enable_realtime_signals: Error getting flags FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETFL, flags | O_ASYNC | O_RDWR);
  if (err < 0) { 
    printf("enable_realtime_signals: Error setting ASYNC FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETSIG, SIGRTMIN+10);
  if (err < 0) {
    printf("enable_realtime_signals: Error setting signum FD %d\n", fd);
    return;
  }
  err = fcntl(fd, F_SETOWN, getpid());
  if (err < 0) {
    printf("enable_realtime_signals: Error setting pid FD %d\n", fd);
    return;
  }
}


void
commSetNonBlocking(int fd)
{
    int flags;
    int dummy = 0;

    if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) {
      printf("FD %d: fcntl F_GETFL: %s\n", fd, strerror(errno));
      return;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
      printf("commSetNonBlocking: FD %d: %s\n", fd, strerror(errno));
      return;
    }
}



int main() {
  int listenfd;
  int fd;
  int ret_val;
  struct sockaddr_in addr;
  short port = 5001;

  sigemptyset(&signalset);
  sigaddset(&signalset, SIGRTMIN+10);
  sigaddset(&signalset, SIGIO);
  sigprocmask(SIG_BLOCK, &signalset, NULL);

  fd = socket(AF_INET, SOCK_STREAM, 0);
  if(fd <= 0) {
    printf("Socket creation failed : %s\n",strerror(errno));
    return 1;
  }
 
  /* Set signal, pid etc */

  setCloseOnExec(fd);
  commSetNonBlocking(fd);  
  enable_rt_signal(fd);

  /* Bind to port 5001 */

  memset(&addr, '\0', sizeof(addr));
  addr.sin_family = AF_INET;
  addr.sin_port = htons(port);
  // addr.sin_addr = in_addr;
   
  ret_val = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
  if(ret_val < 0) { 
    printf("Bind failed : %s\n",strerror(errno));
    return 1;
  }  

  /* Listen */
 
  ret_val = listen(fd, 5);
  if(ret_val < 0) { 
    printf("Listen failed : %s\n",strerror(errno));
    return 1;
  }
  
  printf("Listening FD is %d\n",fd);

  /* we will be here ..always */

  while(1) {
    int signum;
    struct timespec ts;
    ts.tv_sec = 2;
    ts.tv_nsec = (100 % 1000) * 1000;
    
    signum = sigtimedwait(&signalset, &siginfo, &ts);

    if(signum == -1 && errno == EINTR) {
      printf("Timeout\n");
      continue;
    }

    printf("Signum : %d : %s\n",signum,strerror(errno));

    if(signum != SIGRTMIN+10) {
      printf("Unknown signal \n");      
    }

    if(signum == SIGRTMIN+10) {
      /* Print siginfo values */
      printf("Signum : %d\n",siginfo.si_signo);
      printf("FD     : %d\n",siginfo.si_fd);
      printf("BAND   : %d\n",siginfo.si_band);
      printf("Code   : %d\n",siginfo.si_code);
    }
  }
  return 0;
}

Re: Fw: [Linux-ia64] problem in sigtimedwait

[David Mosberger]

>>>>> On Sun, 23 Jun 2002 22:33:39 +0530, "kumar" <kumareshind@gmx.net> said:

  Kumar> If somebody else have some idea, please post it asap.
  Kumar> Hello david,
  Kumar> I have attached the test program as you asked for testing
  Kumar> "sigtimedwait".whether it returns proper "si_fd" value.
  Kumar> Please try with this.

  Kumar> I have tested by the following way:
  Kumar> 1)Compiled and run the program
  Kumar> 2)In the other terminal, i have run the command "telnet localhost 5001".
  Kumar> 3)You can view the results in the terminal where the test program is
  Kumar> running.

I tried this and it seems to work as expected:

	$ ./rtsignaltest
	Listening FD is 3
	Signum : 42 : Success
	Signum : 42
	FD     : 0
	BAND   : 65
	Code   : 1
	Signum : -1 : Resource temporarily unavailable
	Unknown signal

Perhaps there is a problem due to an old version of glibc?  I ran the
above on a Debian based system with glibc-2.2.5.  I vaguely recall a
problem with the glibc siginfo structure being out of sync with the
kernel, but that was a long time ago.

	--david