MQTT C Client Libraries Internals: MQTTVersion.c File Reference

| MQTT C Client Libraries Internals

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MQTTVersion.c File Reference

MQTTVersion - display the version and build information strings for a library. More...

`#include <stdio.h>`
`#include <stdlib.h>`
`#include <string.h>`
`#include <errno.h>`
`#include <fcntl.h>`
`#include <sys/types.h>`
`#include <ctype.h>`
`#include "MQTTAsync.h"`
`#include <dlfcn.h>`
`#include <sys/mman.h>`
`#include <unistd.h>`
Include dependency graph for MQTTVersion.c:

## Macros
#define | ARRAY_SIZE(a)

## Typedefs
typedef MQTTAsync_nameValue *(* | func_type) (void)

## Functions
char * | FindString (char *filename, const char *eyecatcher_input)
| Finds an eyecatcher in a binary file and returns the following value.
int | printVersionInfo (MQTTAsync_nameValue *info)
int | loadandcall (const char *libname)
void | printEyecatchers (char *filename)
int | main (int argc, char **argv)

## Variables
static const char * | libraries [] = {"paho-mqtt3c", "paho-mqtt3cs", "paho-mqtt3a", "paho-mqtt3as"}
static const char * | eyecatchers []

## Detailed Description

MQTTVersion - display the version and build information strings for a library.

With no arguments, we try to load and call the version string for the libraries we know about: mqttv3c, mqttv3cs, mqttv3a, mqttv3as. With an argument: 1) we try to load the named library, call getVersionInfo and display those values. 2) If that doesn't work, we look through the binary for eyecatchers, and display those.
This will work if the library is not executable in the current environment.

## Macro Definition Documentation

## ◆ ARRAY_SIZE

#define ARRAY_SIZE | ( |  | a | ) |

Value:
(sizeof(a) / sizeof(a[0]))

## Function Documentation

## ◆ FindString()

char * FindString | ( | char * | filename,
|  | const char * | eyecatcher_input )

Finds an eyecatcher in a binary file and returns the following value.

Parameters

  filename | the name of the file
  eyecatcher_input | the eyecatcher string to look for

Returns
  the value found - "" if not found

## Variable Documentation

## ◆ eyecatchers

const char* eyecatchers[]
| static

Initial value:
= {"MQTTAsyncV3_Version", "MQTTAsyncV3_Timestamp",
"MQTTClientV3_Version", "MQTTClientV3_Timestamp"}