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Kernel: "Succeed" quietly for zero-length read() and write().

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This commit is contained in:
Andreas Kling 2019-04-27 16:17:24 +02:00
parent 8bce4b3f42
commit 679ac386eb
1 changed files with 4 additions and 0 deletions
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4
Kernel/Process.cpp
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@ -822,6 +822,8 @@ ssize_t Process::sys$write(int fd, const byte* data, ssize_t size)
{ {
if (size < 0) if (size < 0)
return -EINVAL; return -EINVAL;
if (size == 0)
return 0;
if (!validate_read(data, size)) if (!validate_read(data, size))
return -EFAULT; return -EFAULT;
#ifdef DEBUG_IO #ifdef DEBUG_IO
@ -876,6 +878,8 @@ ssize_t Process::sys$read(int fd, byte* buffer, ssize_t size)
{ {
if (size < 0) if (size < 0)
return -EINVAL; return -EINVAL;
if (size == 0)
return 0;
if (!validate_write(buffer, size)) if (!validate_write(buffer, size))
return -EFAULT; return -EFAULT;
#ifdef DEBUG_IO #ifdef DEBUG_IO