Syscall BSD#200
svc · unix #200
truncate
Définit la longueur d'un fichier désigné par chemin, étendant avec des zéros ou supprimant les octets de fin si nécessaire.
Prototype
int truncate(char *path, off_t length);Retour: int
Arguments
| Name | Type | Dir | Description |
|---|---|---|---|
| path | char | - | |
| length | off_t | - |
Historique des versions
| XNU tag | macOS | # |
|---|---|---|
| xnu-1456.1.26 | macOS 10.6 Snow Leopard | 200 |
| xnu-1699.24.8 | macOS 10.7 Lion | 200 |
| xnu-2050.18.24 | macOS 10.8 Mountain Lion | 200 |
| xnu-2422.115.4 | macOS 10.9 Mavericks | 200 |
| xnu-2782.40.9 | macOS 10.10 Yosemite | 200 |
| xnu-3247.1.106 | macOS 10.11 El Capitan | 200 |
| xnu-3789.1.32 | macOS 10.12 Sierra | 200 |
| xnu-4570.1.46 | macOS 10.13 High Sierra | 200 |
| xnu-4903.221.2 | macOS 10.14 Mojave | 200 |
| xnu-6153.11.26 | macOS 10.15 Catalina | 200 |
| xnu-7195.50.7.100.1 | macOS 11.0 Big Sur | 200 |
| xnu-8019.41.5 | macOS 12.0 Monterey | 200 |
| xnu-8792.41.9 | macOS 13.0 Ventura | 200 |
| xnu-10002.1.13 | macOS 14.0 Sonoma | 200 |
| xnu-11215.1.10 | macOS 15.0 Sequoia | 200 |
| xnu-11417.101.15 | macOS 15.4 Sequoia | 200 |
| xnu-12377.1.9 | macOS 26.0 Tahoe | 200 |
| xnu-10002.41.9 | — | 200 |
| xnu-10002.61.3 | — | 200 |
| xnu-10002.81.5 | — | 200 |
| xnu-10063.101.15 | — | 200 |
| xnu-10063.121.3 | — | 200 |
| xnu-10063.141.1 | — | 200 |
| xnu-11215.41.3 | — | 200 |
| xnu-11215.61.5 | — | 200 |
| xnu-11215.81.4 | — | 200 |
| xnu-11417.121.6 | — | 200 |
| xnu-11417.140.69 | — | 200 |
| xnu-12377.101.15 | — | 200 |
| xnu-12377.41.6 | — | 200 |
| xnu-12377.61.12 | — | 200 |
| xnu-12377.81.4 | — | 200 |
| xnu-1486.2.11 | — | 200 |
| xnu-1504.15.3 | — | 200 |
| xnu-1504.3.12 | — | 200 |
| xnu-1504.7.4 | — | 200 |
| xnu-1504.9.17 | — | 200 |
| xnu-1504.9.26 | — | 200 |
| xnu-1504.9.37 | — | 200 |
| xnu-1699.22.73 | — | 200 |
| xnu-1699.22.81 | — | 200 |
| xnu-1699.24.23 | — | 200 |
| xnu-1699.26.8 | — | 200 |
| xnu-1699.32.7 | — | 200 |
| xnu-2050.22.13 | — | 200 |
| xnu-2050.24.15 | — | 200 |
| xnu-2050.48.11 | — | 200 |
| xnu-2050.7.9 | — | 200 |
| xnu-2050.9.2 | — | 200 |
| xnu-2422.1.72 | — | 200 |
| xnu-2422.100.13 | — | 200 |
| xnu-2422.110.17 | — | 200 |
| xnu-2422.90.20 | — | 200 |
| xnu-2782.1.97 | — | 200 |
| xnu-2782.10.72 | — | 200 |
| xnu-2782.20.48 | — | 200 |
| xnu-2782.30.5 | — | 200 |
| xnu-3247.10.11 | — | 200 |
| xnu-3248.20.55 | — | 200 |
| xnu-3248.30.4 | — | 200 |
| xnu-3248.40.184 | — | 200 |
| xnu-3248.50.21 | — | 200 |
| xnu-3248.60.10 | — | 200 |
| xnu-3789.21.4 | — | 200 |
| xnu-3789.31.2 | — | 200 |
| xnu-3789.41.3 | — | 200 |
| xnu-3789.51.2 | — | 200 |
| xnu-3789.60.24 | — | 200 |
| xnu-3789.70.16 | — | 200 |
| xnu-4570.20.62 | — | 200 |
| xnu-4570.31.3 | — | 200 |
| xnu-4570.41.2 | — | 200 |
| xnu-4570.51.1 | — | 200 |
| xnu-4570.61.1 | — | 200 |
| xnu-4570.71.2 | — | 200 |
| xnu-4903.231.4 | — | 200 |
| xnu-4903.241.1 | — | 200 |
| xnu-4903.270.47 | — | 200 |
| xnu-6153.101.6 | — | 200 |
| xnu-6153.121.1 | — | 200 |
| xnu-6153.141.1 | — | 200 |
| xnu-6153.41.3 | — | 200 |
| xnu-6153.61.1 | — | 200 |
| xnu-6153.81.5 | — | 200 |
| xnu-7195.101.1 | — | 200 |
| xnu-7195.121.3 | — | 200 |
| xnu-7195.141.2 | — | 200 |
| xnu-7195.60.75 | — | 200 |
| xnu-7195.81.3 | — | 200 |
| xnu-8019.61.5 | — | 200 |
| xnu-8019.80.24 | — | 200 |
| xnu-8020.101.4 | — | 200 |
| xnu-8020.121.3 | — | 200 |
| xnu-8020.140.41 | — | 200 |
| xnu-8792.61.2 | — | 200 |
| xnu-8792.81.2 | — | 200 |
| xnu-8796.101.5 | — | 200 |
| xnu-8796.121.2 | — | 200 |
| xnu-8796.141.3 | — | 200 |
Notes
L'extension crée un trou lorsque le système de fichiers supporte le sparse (APFS le supporte). Tronquer en dessous de la taille courante libère du stockage et peut invalider les pages mmap en cache. Requiert le droit d'écriture sur le fichier.
Détection
syscall::truncate:entry en DTrace; ES émet ES_EVENT_TYPE_NOTIFY_TRUNCATE avec le vnode cible.
API associées
ftruncateopenfcntlunlink