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Full Discussion: Trigger execution of commands whenever number of file descriptors changes
Top Forums UNIX for Dummies Questions & Answers Trigger execution of commands whenever number of file descriptors changes Post 302363090 by jim mcnamara on Monday 19th of October 2009 10:56:49 AM
Old 10-19-2009
Solaris does not have inotify - a popen() call to fuser can do that for you. The best choice is to use the /proc directory via pfiles [pid]:
something like this --
Code:
#include <unistd.h>
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>

int openfilecnt(void)
{
    int retval=0;
    FILE *cmd=NULL;
    char tmp[256]={0x0};
    char cmdstr[PATH_MAX+1]={0x0};
    sprintf(cmdstr, "/usr/bin/pfiles %d", getpid() );
    cmd=popen(cmdstr, "r");
    if(cmd==NULL) 
       { perror("command error"); exit(1);}
    while (fgets(tmp, sizeof(tmp), cmd)!=NULL)
    {
       retval++;
    }
    pclose(cmd);
    return (retval -2)/2;  
}

Next time. mention your OS, it helps a lot.
 

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LEARN ABOUT CENTOS

papi_library_init

PAPI_library_init(3)						       PAPI						      PAPI_library_init(3)

NAME

       PAPI_library_init -

       initialize the PAPI library.

SYNOPSIS

Detailed Description
       @param version
	   upon initialization, PAPI checks the argument against the internal
	   value of PAPI_VER_CURRENT when the library was compiled.
	   This guards against portability problems when updating the PAPI shared
	   libraries on your system.

       @retval PAPI_EINVAL
	   papi.h is different from the version used to compile the PAPI library.
       @retval PAPI_ENOMEM
	   Insufficient memory to complete the operation.
       @retval PAPI_ECMP
	   This component does not support the underlying hardware.
       @retval PAPI_ESYS
	   A system or C library call failed inside PAPI, see the errno variable.

       PAPI_library_init() initializes the PAPI library.
       PAPI_is_initialized() check for initialization.
       It must be called before any low level PAPI functions can be used.
       If your application is making use of threads PAPI_thread_init must also be
       called prior to making any calls to the library other than PAPI_library_init() .
       @par Examples:

       *       int retval;
       *       retval = PAPI_library_init(PAPI_VER_CURRENT);
       *       if (retval != PAPI_VER_CURRENT && retval > 0) {
       *	   fprintf(stderr,"PAPI library version mismatch!
");
       *	   exit(1); }
       *       if (retval < 0)
       *	   handle_error(retval);
       *       retval = PAPI_is_initialized();
       *       if (retval != PAPI_LOW_LEVEL_INITED)
       *	   handle_error(retval)
       *

       See Also:
	   PAPI_thread_init PAPI

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

Version 5.2.0.0 						  Tue Jun 17 2014					      PAPI_library_init(3)
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