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Diffstat (limited to 'src/common/open_stdxxx.h')
-rw-r--r-- | src/common/open_stdxxx.h | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/src/common/open_stdxxx.h b/src/common/open_stdxxx.h deleted file mode 100644 index 22300851..00000000 --- a/src/common/open_stdxxx.h +++ /dev/null @@ -1,49 +0,0 @@ -/////////////////////////////////////////////////////////////////////////////// -// -/// \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 |