diff options
Diffstat (limited to 'lib/libc/posix1e/acl_perm.c')
| -rw-r--r-- | lib/libc/posix1e/acl_perm.c | 52 |
1 files changed, 32 insertions, 20 deletions
diff --git a/lib/libc/posix1e/acl_perm.c b/lib/libc/posix1e/acl_perm.c index 37d29d6..b5108ca 100644 --- a/lib/libc/posix1e/acl_perm.c +++ b/lib/libc/posix1e/acl_perm.c @@ -35,6 +35,20 @@ __FBSDID("$FreeBSD$"); #include <errno.h> #include <string.h> +static int +_perm_is_invalid(acl_perm_t perm) +{ + + /* Check if more than a single bit is set. */ + if ((perm & -perm) == perm && + (perm & (ACL_POSIX1E_BITS | ACL_NFS4_PERM_BITS)) == perm) + return (0); + + errno = EINVAL; + + return (1); +} + /* * acl_add_perm() (23.4.1): add the permission contained in perm to the * permission set permset_d @@ -43,18 +57,17 @@ int acl_add_perm(acl_permset_t permset_d, acl_perm_t perm) { - if (permset_d) { - switch(perm) { - case ACL_READ: - case ACL_WRITE: - case ACL_EXECUTE: - *permset_d |= perm; - return (0); - } + if (permset_d == NULL) { + errno = EINVAL; + return (-1); } - errno = EINVAL; - return (-1); + if (_perm_is_invalid(perm)) + return (-1); + + *permset_d |= perm; + + return (0); } /* @@ -83,16 +96,15 @@ int acl_delete_perm(acl_permset_t permset_d, acl_perm_t perm) { - if (permset_d) { - switch(perm) { - case ACL_READ: - case ACL_WRITE: - case ACL_EXECUTE: - *permset_d &= ~(perm & ACL_PERM_BITS); - return (0); - } + if (permset_d == NULL) { + errno = EINVAL; + return (-1); } - errno = EINVAL; - return (-1); + if (_perm_is_invalid(perm)) + return (-1); + + *permset_d &= ~perm; + + return (0); } |
