Mercurial > gnulib
view lib/dup3.c @ 40231:9b3c79fdfe0b
strtod: fix clash with strtold
Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817).
* lib/strtod.c (compute_minus_zero, minus_zero):
Simplify by remving the macro / external variable,
and having just a function. User changed. This avoids
the need for an external variable that might clash.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Mon, 11 Mar 2019 16:40:29 -0700 |
parents | b06060465f09 |
children |
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/* Copy a file descriptor, applying specific flags. Copyright (C) 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 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 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/>. */ #include <config.h> /* Specification. */ #include <unistd.h> #include <errno.h> #include <fcntl.h> #include <limits.h> #include "binary-io.h" int dup3 (int oldfd, int newfd, int flags) { #if HAVE_DUP3 # undef dup3 # if HAVE_SETDTABLESIZE /* Avoid a cygwin crasher. */ setdtablesize (newfd + 1); # endif /* Try the system call first, if it exists. (We may be running with a glibc that has the function but with an older kernel that lacks it.) */ { /* Cache the information whether the system call really exists. */ static int have_dup3_really; /* 0 = unknown, 1 = yes, -1 = no */ if (have_dup3_really >= 0) { int result = dup3 (oldfd, newfd, flags); if (!(result < 0 && errno == ENOSYS)) { have_dup3_really = 1; # if REPLACE_FCHDIR if (0 <= result) result = _gl_register_dup (oldfd, newfd); # endif return result; } have_dup3_really = -1; } } #endif if (newfd < 0 || newfd >= getdtablesize () || fcntl (oldfd, F_GETFD) == -1) { errno = EBADF; return -1; } if (newfd == oldfd) { errno = EINVAL; return -1; } /* Check the supported flags. Note that O_NONBLOCK is not supported, because setting it on newfd would implicitly also set it on oldfd. */ if ((flags & ~(O_CLOEXEC | O_BINARY | O_TEXT)) != 0) { errno = EINVAL; return -1; } if (flags & O_CLOEXEC) { int result; close (newfd); result = fcntl (oldfd, F_DUPFD_CLOEXEC, newfd); if (newfd < result) { close (result); errno = EIO; result = -1; } if (result < 0) return -1; } else if (dup2 (oldfd, newfd) < 0) return -1; #if O_BINARY if (flags & O_BINARY) set_binary_mode (newfd, O_BINARY); else if (flags & O_TEXT) set_binary_mode (newfd, O_TEXT); #endif return newfd; }