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author | Andy Wingo <wingo@pobox.com> | 2011-06-16 18:22:50 +0200 |
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committer | Andy Wingo <wingo@pobox.com> | 2011-06-16 19:47:25 +0200 |
commit | 3d458a81c64e4696157b23c7c4c4c150aa4a93b8 (patch) | |
tree | 1478fb3a9faaf203f517a8776f54d00884efdef6 /lib/lseek.c | |
parent | 0b77014f0c7d53b8bdbc7059c92f526560e1cacd (diff) | |
download | guile-3d458a81c64e4696157b23c7c4c4c150aa4a93b8.tar.gz |
gnulib update
Added pipe2 and open modules, to get O_CLOEXEC.
* libguile/Makefile.am (guile_filter_doc_snarfage$(EXEEXT)): Add gnulib
here, in the native build case, for rpl_fflush if needed.
foo
Diffstat (limited to 'lib/lseek.c')
-rw-r--r-- | lib/lseek.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/lib/lseek.c b/lib/lseek.c new file mode 100644 index 000000000..32e8bd17c --- /dev/null +++ b/lib/lseek.c @@ -0,0 +1,62 @@ +/* An lseek() function that detects pipes. + Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License along + with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include <config.h> + +/* Specification. */ +#include <unistd.h> + +#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ +/* Windows platforms. */ +/* Get GetFileType. */ +# include <windows.h> +#else +# include <sys/stat.h> +#endif +#include <errno.h> + +#undef lseek + +off_t +rpl_lseek (int fd, off_t offset, int whence) +{ +#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ + /* mingw lseek mistakenly succeeds on pipes, sockets, and terminals. */ + HANDLE h = (HANDLE) _get_osfhandle (fd); + if (h == INVALID_HANDLE_VALUE) + { + errno = EBADF; + return -1; + } + if (GetFileType (h) != FILE_TYPE_DISK) + { + errno = ESPIPE; + return -1; + } +#else + /* BeOS lseek mistakenly succeeds on pipes... */ + struct stat statbuf; + if (fstat (fd, &statbuf) < 0) + return -1; + if (!S_ISREG (statbuf.st_mode)) + { + errno = ESPIPE; + return -1; + } +#endif + return lseek (fd, offset, whence); +} |