From 3534b428629be185e096be99e3bd5fdfe32d5544 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Thu, 18 Sep 2014 18:55:44 +0000 Subject: initial commit with rc for skalibs-2.0.0.0 --- src/libstddjb/fd_ensure_open.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/libstddjb/fd_ensure_open.c (limited to 'src/libstddjb/fd_ensure_open.c') diff --git a/src/libstddjb/fd_ensure_open.c b/src/libstddjb/fd_ensure_open.c new file mode 100644 index 0000000..b399af2 --- /dev/null +++ b/src/libstddjb/fd_ensure_open.c @@ -0,0 +1,25 @@ +/* ISC license. */ + +#include +#include +#include + +int fd_ensure_open (int fd, int w) +{ + int dummy ; + if (fcntl(fd, F_GETFD, &dummy) < 0) + { + int newfd ; + if (errno != EBADF) return 0 ; + newfd = open2("/dev/null", w ? O_WRONLY : O_RDONLY) ; + if (newfd < 0) return 0 ; + if (fd_move(fd, newfd) < 0) + { + register int e = errno ; + fd_close(newfd) ; + errno = e ; + return 0 ; + } + } + return 1 ; +} -- cgit v1.3.1