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Kernel: Support O_APPEND

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As per the manpage, this acts as a transparent lseek() before write.
This commit is contained in:
Robin Burchell 2019-05-26 01:18:04 +02:00 • committed by Andreas Kling
parent 90dbf689c0
commit c6e79bd53a
3 changed files with 13 additions and 2 deletions
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11
Kernel/Process.cpp
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@ -861,6 +861,13 @@ ssize_t Process::do_write(FileDescriptor& descriptor, const byte* data, int data
return -EAGAIN;
}
if (descriptor.should_append()) {
#ifdef IO_DEBUG
dbgprintf("seeking to end (O_APPEND)\n");
#endif
descriptor.seek(0, SEEK_END);
}
while (nwritten < data_size) {
#ifdef IO_DEBUG
dbgprintf("while %u < %u\n", nwritten, size);
@ -1118,8 +1125,8 @@ int Process::sys$open(const char* path, int options, mode_t mode)
auto descriptor = result.value();
if (options & O_DIRECTORY && !descriptor->is_directory())
return -ENOTDIR; // FIXME: This should be handled by VFS::open.
if (options & O_NONBLOCK)
descriptor->set_blocking(false);
descriptor->set_blocking(!(options & O_NONBLOCK));
descriptor->set_should_append(options & O_APPEND);
dword flags = (options & O_CLOEXEC) ? FD_CLOEXEC : 0;
m_fds[fd].set(move(descriptor), flags);
return fd;