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MQTT C Client Libraries Internals
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A file system based persistence implementation. More...
#include "OsWrapper.h"#include <stdio.h>#include <string.h>#include <errno.h>#include <sys/stat.h>#include <dirent.h>#include <unistd.h>#include "MQTTClientPersistence.h"#include "MQTTPersistenceDefault.h"#include "StackTrace.h"#include "Heap.h"
Functions | |
| int | keysUnix (char *, char ***, int *) |
| int | clearUnix (char *) |
| int | containskeyUnix (char *, char *) |
| int | pstopen (void **handle, const char *clientID, const char *serverURI, void *context) |
| Create persistence directory for the client: context/clientID-serverURI. More... | |
| int | pstmkdir (char *pPathname) |
| Function to create a directory. More... | |
| int | pstput (void *handle, char *key, int bufcount, char *buffers[], int buflens[]) |
| Write wire message to the client persistence directory. More... | |
| int | pstget (void *handle, char *key, char **buffer, int *buflen) |
| Retrieve a wire message from the client persistence directory. More... | |
| int | pstremove (void *handle, char *key) |
| Delete a persisted message from the client persistence directory. More... | |
| int | pstclose (void *handle) |
| Delete client persistence directory (if empty). More... | |
| int | pstcontainskey (void *handle, char *key) |
| Returns whether if a wire message is persisted in the client persistence directory. More... | |
| int | pstclear (void *handle) |
| Delete all the persisted message in the client persistence directory. More... | |
| int | pstkeys (void *handle, char ***keys, int *nkeys) |
| Returns the keys (file names w/o the extension) in the client persistence directory. More... | |
A file system based persistence implementation.
A directory is specified when the MQTT client is created. When the persistence is then opened (see Persistence_open), a sub-directory is made beneath the base for this particular client ID and connection key. This allows one persistence base directory to be shared by multiple clients.
| int pstclear | ( | void * | handle | ) |
Delete all the persisted message in the client persistence directory.
| int pstclose | ( | void * | handle | ) |
Delete client persistence directory (if empty).
| int pstcontainskey | ( | void * | handle, |
| char * | key | ||
| ) |
Returns whether if a wire message is persisted in the client persistence directory.
| int pstget | ( | void * | handle, |
| char * | key, | ||
| char ** | buffer, | ||
| int * | buflen | ||
| ) |
Retrieve a wire message from the client persistence directory.
See Persistence_get
| int pstkeys | ( | void * | handle, |
| char *** | keys, | ||
| int * | nkeys | ||
| ) |
Returns the keys (file names w/o the extension) in the client persistence directory.
See Persistence_keys
| int pstmkdir | ( | char * | pPathname | ) |
Function to create a directory.
Returns 0 on success or if the directory already exists.
| int pstopen | ( | void ** | handle, |
| const char * | clientID, | ||
| const char * | serverURI, | ||
| void * | context | ||
| ) |
Create persistence directory for the client: context/clientID-serverURI.
See Persistence_open

| int pstput | ( | void * | handle, |
| char * | key, | ||
| int | bufcount, | ||
| char * | buffers[], | ||
| int | buflens[] | ||
| ) |
Write wire message to the client persistence directory.
See Persistence_put

| int pstremove | ( | void * | handle, |
| char * | key | ||
| ) |
Delete a persisted message from the client persistence directory.
1.8.17