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https://github.com/RGBCube/serenity
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Kernel: Use Userspace<T> for the uname syscall
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cfedd62b5c
commit
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2 changed files with 13 additions and 7 deletions
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@ -28,7 +28,7 @@
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namespace Kernel {
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int Process::sys$uname(utsname* buf)
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int Process::sys$uname(Userspace<utsname*> buf)
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{
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extern String* g_hostname;
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extern Lock* g_hostname_lock;
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@ -36,14 +36,20 @@ int Process::sys$uname(utsname* buf)
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REQUIRE_PROMISE(stdio);
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if (!validate_write_typed(buf))
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return -EFAULT;
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LOCKER(*g_hostname_lock, Lock::Mode::Shared);
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if (g_hostname->length() + 1 > sizeof(utsname::nodename))
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return -ENAMETOOLONG;
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copy_to_user(buf->sysname, "SerenityOS", 11);
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copy_to_user(buf->release, "1.0-dev", 8);
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copy_to_user(buf->version, "FIXME", 6);
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copy_to_user(buf->machine, "i686", 5);
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copy_to_user(buf->nodename, g_hostname->characters(), g_hostname->length() + 1);
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// We have already validated the entire utsname struct at this
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// point, there is no need to re-validate every write to the struct.
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utsname* user_buf = buf.unsafe_userspace_ptr();
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copy_to_user(user_buf->sysname, "SerenityOS", 11);
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copy_to_user(user_buf->release, "1.0-dev", 8);
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copy_to_user(user_buf->version, "FIXME", 6);
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copy_to_user(user_buf->machine, "i686", 5);
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copy_to_user(user_buf->nodename, g_hostname->characters(), g_hostname->length() + 1);
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return 0;
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}
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