Mercurial > gnulib
view lib/fopen-safer.c @ 40140:81f075eaa990
ptsname_r: Work around bug on Android 4.3.
* m4/ptsname_r.m4 (gl_FUNC_PTSNAME_R): Define
HAVE_ESSENTIALLY_WORKING_PTSNAME_R. Test whether the return value is
correct.
* lib/ptsname_r.c (__ptsname_r): If HAVE_ESSENTIALLY_WORKING_PTSNAME_R
is defined, just fix the return value.
* doc/glibc-functions/ptsname_r.texi: Mention the Android bug. Reword:
The behaviour of musl libc is nothing to be "fixed", since it is
compliant with the next POSIX standard.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 26 Jan 2019 15:23:19 +0100 |
parents | b06060465f09 |
children |
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/* Invoke fopen, but avoid some glitches. Copyright (C) 2001, 2004-2006, 2009-2019 Free Software Foundation, Inc. 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 <https://www.gnu.org/licenses/>. */ /* Written by Paul Eggert. */ #include <config.h> #include "stdio-safer.h" #include <errno.h> #include <unistd.h> #include "unistd-safer.h" /* Like fopen, but do not return stdin, stdout, or stderr. */ FILE * fopen_safer (char const *file, char const *mode) { FILE *fp = fopen (file, mode); if (fp) { int fd = fileno (fp); if (0 <= fd && fd <= STDERR_FILENO) { int f = dup_safer (fd); if (f < 0) { int e = errno; fclose (fp); errno = e; return NULL; } if (fclose (fp) != 0 || ! (fp = fdopen (f, mode))) { int e = errno; close (f); errno = e; return NULL; } } } return fp; }