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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/open.c
+12 -3
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@@ -5,7 +5,7 @@
#include <errno.h>
#include <logging.h>
syscallret_t syscall_openat(context_t *context, int dirfd, const char *path, int flags, mode_t mode) {
syscallret_t syscall_openat(context_t *context, int dirfd, char *path, int flags, mode_t mode) {
syscallret_t ret = {
.ret = -1,
.errno = -1
@@ -17,16 +17,25 @@ syscallret_t syscall_openat(context_t *context, int dirfd, const char *path, int
vnode_t *dirnode = NULL;
file_t *dirfile = NULL;
size_t pathsize = strlen(path); // TODO u_strlen
size_t pathsize;
ret.errno = usercopy_strlen(path, &pathsize);
char *pathbuf = alloc(pathsize + 1);
if (pathbuf == NULL) {
ret.errno = ENOMEM;
return ret;
}
strcpy(pathbuf, path); // TODO u_strcpy
ret.errno = usercopy_fromuser(pathbuf, path, pathsize);
if (ret.errno) {
free(pathbuf);
return ret;
}
ret.errno = dirfd_enter(pathbuf, dirfd, &dirfile, &dirnode);
if (ret.errno) {
free(pathbuf);
return ret;
}
retry_open:
file_t *newfile = NULL;