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auth: initial implementation + some filesystem checks

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Matheus
2024-08-24 20:00:46 -03:00
parent dd70116695
commit 4d51507953
19 changed files with 251 additions and 34 deletions
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kernel-src/sys/syscalls/fchownat.c
+8 -1
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@@ -1,6 +1,7 @@
#include <kernel/syscalls.h>
#include <kernel/alloc.h>
#include <kernel/vfs.h>
#include <kernel/auth.h>
syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid_t group, int flags) {
syscallret_t ret = {
@@ -48,15 +49,21 @@ syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid
goto cleanup;
}
ret.errno = auth_filesystem_check(&_cpu()->thread->proc->cred, AUTH_ACTIONS_FILESYSTEM_SETATTR, node);
if (ret.errno)
goto cleanup;
vattr_t attr;
ret.errno = VOP_GETATTR(node, &attr, &_cpu()->thread->proc->cred);
if (ret.errno)
goto cleanup;
// TODO retain set uid and set gid bits if an auth access was ok
attr.uid = owner;
attr.gid = group;
attr.mode = (attr.mode) & ~(V_ATTR_MODE_SGID | V_ATTR_MODE_SUID);
ret.errno = VOP_SETATTR(node, &attr, V_ATTR_UID | V_ATTR_GID, &_cpu()->thread->proc->cred);
ret.errno = VOP_SETATTR(node, &attr, ((owner == -1) ? 0 : V_ATTR_UID) | ((group == -1) ? 0 : V_ATTR_GID), &_cpu()->thread->proc->cred);
ret.ret = ret.errno ? -1 : 0;
cleanup: