/* BEGIN_ICS_COPYRIGHT5 ****************************************

Copyright (c) 2015-2017, Intel Corporation

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,

      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright

      notice, this list of conditions and the following disclaimer in the

      documentation and/or other materials provided with the distribution.

    * Neither the name of Intel Corporation nor the names of its contributors

      may be used to endorse or promote products derived from this software

      without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

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 * ** END_ICS_COPYRIGHT5   ****************************************/

//=======================================================================

//									/

// FILE NAME								/

//    vs_utility.c							/

//									/

// DESCRIPTION								/

//    This is the CS routines which don't fit a common category.	/

//									/

// DATA STRUCTURES							/

//    None								/

//									/

// FUNCTIONS								/

//    vs_enter		log an entry into a routine			/

//    vs_exit		log an exit from a routine			/

//    vs_time_get	get the current epoch time			/

//									/

// DEPENDENCIES								/

//    ib_mad.h								/

//    ib_status.h							/

//									/

//									/

// HISTORY								/

//									/

//    NAME	DATE  REMARKS						/

//     jsy  02/14/01  Initial creation of file.				/

//     jsy  04/04/01  Added vs_getpid function.				/

//     trp  08/20/01  Removed vs_getpid (vs_thread_name) is one to use	/

//=======================================================================

#include <stdio.h>

#include <errno.h>

#include <signal.h>

#include <string.h>

#include <sys/stat.h>

#include <unistd.h>

#include <pthread.h>

#include <sys/time.h>

#include <sys/resource.h>

#include "ib_mad.h"

#include "ib_status.h"

#include "cs_g.h"

#include "cs_log.h"

#include <features.h>

#ifdef LOCAL_MOD_ID

#undef LOCAL_MOD_ID

#endif

#define LOCAL_MOD_ID VIEO_CS_MOD_ID

//----------------------------------------------------------------------------//

Status_t

vs_time_get(uint64_t *address)

{

	uint64_t	usecs;

	struct	timespec	now;

        if (address == 0)

          {

            return(VSTATUS_ILLPARM);

          }

	clock_gettime(CLOCK_MONOTONIC, &now;;

	usecs = now.tv_sec;

	usecs *= 1000000;

	usecs += (now.tv_nsec/1000);

	/*round up anything greater than 0.5 usecs*/

	if (now.tv_nsec % 1000 > 500)

		usecs++;

	*address = usecs;

	return(VSTATUS_OK);

}

/*

 * vs_stdtime_get - get current time as a time_t, seconds since 1970

 */

Status_t

vs_stdtime_get(time_t *address)

{

	if (-1 == time(address))

		return VSTATUS_BAD;

	return(VSTATUS_OK);

}

// Translate CoreDumpLimit string to a rlimit value

// returns 0 on success, -1 on error

// value argument is optional, if NULL just checks str is valid CoreDumpLimit

// str can be a byte count or "unlimited"

int vs_getCoreDumpLimit(const char* str, uint64_t* value)

{

	uint64_t rlimit;

	if (!str)

		return -1;

	if (! strlen(str))

		return -1;

	if (strcasecmp(str, "unlimited") == 0) {

		rlimit = RLIM_INFINITY;

	} else {

		if (FSUCCESS != StringToUint64Bytes(&rlimit, str, NULL, 0, TRUE))

			return -1;

		// treat small values as Megabytes

		if (rlimit < 8192)

			rlimit = rlimit * (1024*1024);

	}

	if (value)

		*value = rlimit;

	return 0;

}

/*

 *  vs_init_coredump_settings - setup coredump config for this process

 *  note this changes the current directory

 */

void vs_init_coredump_settings(const char* mgr, const char* limit, const char *dir)

{

	struct rlimit rlimit;

	char buf[140];

	struct stat statbuf;

	rlimit.rlim_max = RLIM_SAVED_MAX;

	if (0 != vs_getCoreDumpLimit(limit, &rlimit.rlim_cur)) {

		// parser should have already validated, but just to be safe

		snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: Invalid CoreDumpLimit: '%s'",

				mgr, limit);

		vs_log_output_message(buf, FALSE);

		rlimit.rlim_cur = 0; limit = "0";

	} else if (rlimit.rlim_cur == 0) {

		snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: CoreDumpLimit: %s", mgr, limit);

		vs_log_output_message(buf, FALSE);

	} else if (strlen(dir) == 0 || 0 == strcmp(dir, "/dev/null")) {

		snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: No CoreDumpDir", mgr);

		vs_log_output_message(buf, FALSE);

		rlimit.rlim_cur = 0; limit = "0";

	} else {

		if (-1 == stat(dir, &statbuf)) {

			if (mkdir(dir, 0644) != 0) {

				snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: Unable to create CoreDumpDir: '%s' %m", mgr, dir);

				vs_log_output_message(buf, FALSE);

				rlimit.rlim_cur = 0; limit = "0";

			}

		} else if (! S_ISDIR(statbuf.st_mode)) {

			snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: CoreDumpDir is not a directory: '%s'", mgr, dir);

			vs_log_output_message(buf, FALSE);

			rlimit.rlim_cur = 0; limit = "0";

		}

		if (0 != chdir(dir)) {

			snprintf(buf, sizeof(buf), "%s: Disabling CoreDumps: Unable to cd CoreDumpDir: '%s' %m", mgr, dir);

			vs_log_output_message(buf, FALSE);

			rlimit.rlim_cur = 0; limit = "0";

		}

	}

	if (setrlimit(RLIMIT_CORE, &rlimit) != 0) {

		snprintf(buf, sizeof(buf), "%s: Unable to change CoreDumpLimit to '%s' %m", mgr, limit);

		vs_log_output_message(buf, FALSE);

	} else if (rlimit.rlim_cur) {

		snprintf(buf, sizeof(buf), "%s: Enabling CoreDumps to %s up to %s bytes", mgr, dir, limit);

		vs_log_output_message(buf, FALSE);

	}

}