X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=lib%2Fwrite.c;fp=lib%2Fwrite.c;h=250b5cc8fd4b30ee6f874d487127612a1d2fc801;hb=cf7169a2ede9bb08b71de68fe0c8bbecf827abe6;hp=0000000000000000000000000000000000000000;hpb=138fc7e67e3d9845cd7d81aad0e9c7724784f9b9;p=tar diff --git a/lib/write.c b/lib/write.c new file mode 100644 index 0000000..250b5cc --- /dev/null +++ b/lib/write.c @@ -0,0 +1,62 @@ +/* POSIX compatible write() function. + Copyright (C) 2008 Free Software Foundation, Inc. + Written by Bruno Haible , 2008. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#include + +/* Specification. */ +#include + +/* Replace this function only if module 'sigpipe' is requested. */ +#if GNULIB_SIGPIPE + +/* On native Windows platforms, SIGPIPE does not exist. When write() is + called on a pipe with no readers, WriteFile() fails with error + GetLastError() = ERROR_NO_DATA, and write() in consequence fails with + error EINVAL. */ + +# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ + +# include +# include +# include + +# define WIN32_LEAN_AND_MEAN /* avoid including junk */ +# include + +ssize_t +rpl_write (int fd, const void *buf, size_t count) +#undef write +{ + ssize_t ret = write (fd, buf, count); + + if (ret < 0) + { + if (GetLastError () == ERROR_NO_DATA + && GetFileType (_get_osfhandle (fd)) == FILE_TYPE_PIPE) + { + /* Try to raise signal SIGPIPE. */ + raise (SIGPIPE); + /* If it is currently blocked or ignored, change errno from EINVAL + to EPIPE. */ + errno = EPIPE; + } + } + return ret; +} + +# endif +#endif