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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/hostname.c
+8 -6
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@@ -31,29 +31,31 @@ syscallret_t syscall_hostname(context_t *, char *unew, size_t newsize, char *uol
char new[HOST_NAME_MAX];
char old[HOST_NAME_MAX + 1];
if (unew)
memcpy(new, unew, newsize);
if (unew) {
ret.errno = usercopy_fromuser(new, unew, newsize);
if (ret.errno)
return ret;
}
interrupt_set(false);
spinlock_acquire(&lock);
size_t copysize = min(oldsize - 1, bufferlen);
if (uold) {
size_t copysize = min(oldsize - 1, bufferlen);
memcpy(old, buffer, copysize);
old[copysize] = '\0';
}
if (unew) {
bufferlen = newsize;
strcpy(buffer, new);
memcpy(buffer, new, newsize);
}
spinlock_release(&lock);
interrupt_set(true);
if (uold)
strcpy(uold, old);
ret.errno = usercopy_touser(uold, old, copysize + 1);
ret.errno = 0;
ret.ret = 0;