diff options
Diffstat (limited to 'storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/src/common/open_stdxxx.h')
-rw-r--r-- | storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/src/common/open_stdxxx.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/src/common/open_stdxxx.h b/storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/src/common/open_stdxxx.h new file mode 100644 index 00000000000..d46962f2c4d --- /dev/null +++ b/storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/src/common/open_stdxxx.h @@ -0,0 +1,51 @@ +/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */ +// vim: expandtab:ts=8:sw=4:softtabstop=4: +/////////////////////////////////////////////////////////////////////////////// +// +/// \file open_stdxxx.h +/// \brief Make sure that file descriptors 0, 1, and 2 are open +// +// Author: Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef OPEN_STDXXX_H +#define OPEN_STDXXX_H + +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> + + +static void +open_stdxxx(int status) +{ + for (int i = 0; i <= 2; ++i) { + // We use fcntl() to check if the file descriptor is open. + if (fcntl(i, F_GETFD) == -1 && errno == EBADF) { + // With stdin, we could use /dev/full so that + // writing to stdin would fail. However, /dev/full + // is Linux specific, and if the program tries to + // write to stdin, there's already a problem anyway. + const int fd = open("/dev/null", O_NOCTTY + | (i == 0 ? O_WRONLY : O_RDONLY)); + + if (fd != i) { + // Something went wrong. Exit with the + // exit status we were given. Don't try + // to print an error message, since stderr + // may very well be non-existent. This + // error should be extremely rare. + (void)close(fd); + exit(status); + } + } + } + + return; +} + +#endif |