2022-11-25 00:37:21 +11:00
|
|
|
# DumpGDBM
|
|
|
|
|
|
2022-11-26 11:19:17 +11:00
|
|
|
GNU dbm (ou GDBM, en abrégé) est une
|
|
|
|
|
bibliothèque de fonctions de base de données qui utilise un hachage extensible,
|
|
|
|
|
une association `key/value` persistante.
|
|
|
|
|
|
|
|
|
|
https://en.wikipedia.org/wiki/DBM_(computing)
|
|
|
|
|
|
|
|
|
|
## Exemple
|
|
|
|
|
|
|
|
|
|
Le mini-script Perl `exemple.pl` montre bien comment faire une "base de données
|
2022-12-04 03:43:04 +11:00
|
|
|
associative" en Perl. Il extrait les champs _usernale_ et _GECOS_ du fichier
|
|
|
|
|
`/etc/passwd` et les injecte dans un fichier gdbm.
|
2022-11-26 11:19:17 +11:00
|
|
|
|
2022-12-04 03:43:04 +11:00
|
|
|
```
|
|
|
|
|
tth@redlady:~/Devel/KlugyTools/DumpGDBM$ ./exemple.pl
|
|
|
|
|
tth@redlady:~/Devel/KlugyTools/DumpGDBM$ ./dumpgdbm -i exemple.gdbm
|
|
|
|
|
working on [exemple.gdbm]
|
2022-11-26 11:19:17 +11:00
|
|
|
|
2022-12-04 03:43:04 +11:00
|
|
|
dumpgdbm > first
|
|
|
|
|
K: rtkit.
|
|
|
|
|
D: RealtimeKit,,,.
|
|
|
|
|
|
|
|
|
|
dumpgdbm > next
|
|
|
|
|
K: man.
|
|
|
|
|
D: man.
|
|
|
|
|
|
|
|
|
|
dumpgdbm > next
|
|
|
|
|
K: lightdm.
|
|
|
|
|
D: Light Display Manager.
|
|
|
|
|
|
|
|
|
|
dumpgdbm > ? ks
|
|
|
|
|
|
|
|
|
|
command [ks]
|
|
|
|
|
Search a posix regex pattern in all the key fields.
|
|
|
|
|
|
|
|
|
|
dumpgdbm > ks root
|
|
|
|
|
K: root.
|
|
|
|
|
D: root.
|
|
|
|
|
|
|
|
|
|
dumpgdbm > ks tth
|
|
|
|
|
K: tth.
|
|
|
|
|
D: tTh,,,.
|
|
|
|
|
|
|
|
|
|
dumpgdbm >
|
|
|
|
|
EOF ?
|
|
|
|
|
tth@redlady:~/Devel/KlugyTools/DumpGDBM$
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
Well done bro.
|
2022-11-26 11:19:17 +11:00
|
|
|
|
|
|
|
|
|
