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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/utime.c
+16 -4
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@@ -4,14 +4,18 @@
syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[2], int flags) {
syscallret_t ret = {
.ret = -1
.ret = -1,
.errno = 0
};
timespec_t ts[2];
if (uts == NULL)
ts[0] = ts[1] = timekeeper_time();
else
memcpy(ts, uts, sizeof(timespec_t) * 2);
ret.errno = usercopy_fromuser(ts, uts, sizeof(timespec_t) * 2);
if (ret.errno)
return ret;
vnode_t *node = NULL;
vnode_t *dirnode = NULL;
@@ -31,13 +35,21 @@ syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[
fd_release(file);
} else {
// operation is done on the file pointed to by the path relative to fd
path = alloc(strlen(upath) + 1);
size_t pathlen;
ret.errno = usercopy_strlen(upath, &pathlen);
if (ret.errno)
goto cleanup;
path = alloc(pathlen + 1);
if (path == NULL) {
ret.errno = ENOMEM;
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;