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Add dup3(), based on F_DUP2FD and F_DUP2FD_CLOEXEC fcntls.
I removed functionality not proposed for POSIX in Austin group issue #411. A man page (my own) and test cases will follow in later commits. PR: 176233 Submitted by: Jukka Ukkonen
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=254409
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@ -493,6 +493,7 @@ const char *
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int crypt_set_format(const char *);
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int crypt_set_format(const char *);
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int des_cipher(const char *, char *, long, int);
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int des_cipher(const char *, char *, long, int);
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int des_setkey(const char *key);
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int des_setkey(const char *key);
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int dup3(int, int, int);
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int eaccess(const char *, int);
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int eaccess(const char *, int);
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void endusershell(void);
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void endusershell(void);
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int exect(const char *, char * const *, char * const *);
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int exect(const char *, char * const *, char * const *);
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@ -31,6 +31,7 @@ SRCS+= __getosreldate.c \
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disklabel.c \
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disklabel.c \
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dlfcn.c \
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dlfcn.c \
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drand48.c \
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drand48.c \
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dup3.c \
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elf_utils.c \
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elf_utils.c \
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erand48.c \
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erand48.c \
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err.c \
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err.c \
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@ -383,6 +383,7 @@ FBSD_1.2 {
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FBSD_1.3 {
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FBSD_1.3 {
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clock_getcpuclockid;
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clock_getcpuclockid;
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dirfd;
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dirfd;
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dup3;
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fdlopen;
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fdlopen;
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__FreeBSD_libc_enter_restricted_mode;
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__FreeBSD_libc_enter_restricted_mode;
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getcontextx;
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getcontextx;
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59
lib/libc/gen/dup3.c
Normal file
59
lib/libc/gen/dup3.c
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@ -0,0 +1,59 @@
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/*-
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* Copyright (c) 2012 Jukka A. Ukkonen
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* All rights reserved.
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*
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* This software was developed by Jukka Ukkonen for FreeBSD.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "un-namespace.h"
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int
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__dup3(int oldfd, int newfd, int flags)
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{
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int how;
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if (oldfd == newfd) {
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errno = EINVAL;
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return (-1);
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}
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if (flags & ~O_CLOEXEC) {
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errno = EINVAL;
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return (-1);
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}
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how = (flags & O_CLOEXEC) ? F_DUP2FD_CLOEXEC : F_DUP2FD;
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return (_fcntl(oldfd, how, newfd));
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}
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__weak_reference(__dup3, dup3);
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__weak_reference(__dup3, _dup3);
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