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kernel: usercopy functions

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Matheus
2024-06-09 19:31:26 -03:00
parent 429f56aced
commit 50b4b45d00
53 changed files with 712 additions and 260 deletions
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kernel-src/sys/syscalls/fchownat.c
+9 -3
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@@ -2,7 +2,7 @@
#include <kernel/alloc.h>
#include <kernel/vfs.h>
syscallret_t syscall_fchownat(context_t *, int fd, const char *upath, uid_t owner, gid_t group, int flags) {
syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid_t group, int flags) {
syscallret_t ret = {
.ret = -1
};
@@ -11,7 +11,10 @@ syscallret_t syscall_fchownat(context_t *, int fd, const char *upath, uid_t owne
vnode_t *dirnode = NULL;
file_t *file = NULL;
char *path = NULL;
size_t pathlen = strlen(upath);
size_t pathlen;
ret.errno = usercopy_strlen(upath, &pathlen);
if (ret.errno)
return ret;
if (pathlen == 0 && (flags & AT_EMPTY_PATH)) {
// chown is done on the file pointed to by fd
@@ -32,7 +35,10 @@ syscallret_t syscall_fchownat(context_t *, int fd, const char *upath, uid_t owne
goto cleanup;
}
strcpy(path, upath);
ret.errno = usercopy_fromuser(path, upath, pathlen);
if (ret.errno)
goto cleanup;
ret.errno = dirfd_enter(path, fd, &file, &dirnode);
if (ret.errno)
goto cleanup;