Examples of logging APIs used in a C++ agent
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Examples of logging APIs used in a C++ agent

#include <stdio.h>

#include <locale.h>

#include "VCSAgApi.h"

void res_attr_changed(const char *res_name, const char

*changed_res_name,const char *changed_attr_name, void

**new_val)

{

/*

* NOT REQUIRED if the function is empty or is not logging

* any messages to the agent log file

*/

VCSAG_LOG_INIT("res_attr_changed");

}

extern "C" unsigned int

res_clean(const char *res_name, VCSAgWhyClean wc, void

**attr_val)

{

VCSAG_LOG_INIT("res_clean");

if ((attr_val) && (*attr_val)) {

if ((remove((CHAR *)(*attr_val)) == 0) || (errno

== ENOENT)) { return 0; // Success

}

}

return 1; // Failure

}

void res_close(const char *res_name, void **attr_val)

{

VCSAG_LOG_INIT("res_close");

}

//

// Determine if the given file is online (file exists) or

// offline (file does not exist).

//

extern "C" VCSAgResState

res_monitor(const char *res_name, void **attr_val, int *conf_level)

{

VCSAG_LOG_INIT("res_monitor");

VCSAgResState state = VCSAgResUnknown;

*conf_level = 0;

/*

* This msg will be printed for all resources if VCS_DBG4

* is enabled for the resource type. Else it will be

* logged only for that resource that has the dbg level

* VCS_DBG4 enabled

*/

VCSAG_RES_LOG_MSG(VCS_DBG4, VCS_DEFAULT_FLAGS, "PathName

is(%s)", (CHAR *)(*attr_val));

if ((attr_val) && (*attr_val)) {

struct stat stat_buf;

if ( (stat((CHAR *)(* attr_val), &stat_buf) == 0)

&& (strlen((CHAR *)(* attr_val)) != 0) ) {

state = VCSAgResOnline; *conf_level = 100;

}

else {

state = VCSAgResOffline;

*conf_level = 0;

}

}

VCSAG_RES_LOG_MSG(VCS_DBG7, VCS_DEFAULT_FLAGS, "State is

(%d)", (int)state);

return state;

}

extern "C" unsigned int

res_online(const char *res_name, void **attr_val) {

int fd = -1;

VCSAG_LOG_INIT("res_online");

if ((attr_val) && (*attr_val)) {

if (strlen((CHAR *)(* attr_val)) == 0) {

VCSAG_LOG_MSG(VCS_WARNING, 3001, VCS_DEFAULT_FLAGS,

"The value for PathName attribute is not

specified");

VCSAG_CONSOLE_LOG_MSG(VCS_WARNING, 3001,

VCS_DEFAULT_FLAGS,

"The value for PathName attribute is not

specified");

return 0;

}

if (fd = creat((CHAR *)(*attr_val), S_IRUSR|S_IWUSR) < 0) {

VCSAG_LOG_MSG(VCS_ERROR, 3002, VCS_DEFAULT_FLAGS,

"Resource could not be brought up because, "

"the attempt to create the file(%s) failed "

"with error(%d)", (CHAR *)(*attr_val), errno);

VCSAG_CONSOLE_LOG_MSG(VCS_ERROR, 3002,

VCS_DEFAULT_FLAGS,

"Resource could not be brought up because, "

"the attempt to create the file(%s) failed "

"with error(%d)", (CHAR *)(*attr_val), errno);

return 0;

}

close(fd);

}

return 0;

}

extern "C" unsigned int

res_offline(const char *res_name, void **attr_val)

{

VCSAG_LOG_INIT("res_offline");

if ((attr_val) && (*attr_val) && (remove((CHAR*)

(*attr_val)) != 0) && (errno != ENOENT)) {

VCSAG_LOG_MSG(VCS_ERROR, 14002, VCS_DEFAULT_FLAGS,

"Resource could not be brought down because, the

attempt to remove the file(%s) failed with

error(%d)", (CHAR *)(*attr_val), errno);

VCSAG_CONSOLE_LOG_MSG(VCS_ERROR, 14002,

VCS_DEFAULT_FLAGS, "Resource could not be brought

down because, the attempt to remove the file(%s)

failed with error(%d)", (CHAR *)(*attr_val), errno);

}

return 0;

}

void res_open(const char *res_name, void **attr_val)

{

VCSAG_LOG_INIT("res_open");

}

VCSEXPORT void VCSDECL VCSAgStartup()

{

VCSAG_LOG_INIT("VCSAgStartup");

VCSAgInitEntryPointStruct(V50);

VCSAgValidateAndSetEntryPoint(VCSAgEPMonitor, res_monitor);

VCSAgValidateAndSetEntryPoint(VCSAgEPOnline, res_online);

VCSAgValidateAndSetEntryPoint(VCSAgEPOffline, res_offline);

VCSAgValidateAndSetEntryPoint(VCSAgEPClean, res_clean);

VCSAgSetLogCategory(2001);

char *s = setlocale(LC_ALL, NULL);

VCSAG_LOGDBG_MSG(VCS_DBG1, VCS_DEFAULT_FLAGS, "Locale is

%s", s);

}