Even on Illumos it's only available in the 32-bit programming
environment, and, quoth enable_extended_FILE_stdio(3C):
> Historically, 32-bit Solaris applications have been limited to using
> only the file descriptors 0 through 255 with the standard I/O
> functions (see stdio(3C)) in the C library. The extended FILE
> facility allows well-behaved 32-bit applications to use any
> valid file descriptor with the standard I/O functions.
where "well-behaved" means that it
> does not directly access any fields in the FILE structure pointed
> to by the FILE pointer associated with any standard I/O stream,
And the stdio/flush.c implementation reads:
/*
* if this is not an internal extended FILE then check
* if _file is being changed from underneath us.
* It should not be because if
* it is then then we lose our ability to guard against
* silent data corruption.
*/
if (!iop->__xf_nocheck && bad_fd > -1 && iop->_magic != bad_fd) {
(void) fprintf(stderr,
"Application violated extended FILE safety mechanism.\n"
"Please read the man page for extendedFILE.\nAborting\n");
abort();
}
This appears to be an insane workaround for broken implementation with
exposed FILE internals and _file being an u8, both only on non-LP64;
it's shimmed out on all LP64 targets in Illumos,
and we shim it out as well: just get rid of it
This appears to've been originally fixed in illumos-gate
a5f69788de7ac07553de47f7fec8c05a9a94c105 ("PSARC 2006/162 Extended FILE
space for 32-bit Solaris processes", "
1085341 32-bit stdio routines
should support file descriptors >255"), which also bears extendedFILE
and enable_extended_FILE_stdio(3C):
- unsigned char _file; /* UNIX System file descriptor */
+ unsigned char _magic; /* Old home of the file descriptor */
+ /* Only fileno(3C) can retrieve the
value now */
and
+/*
+ * Macros to aid the extended fd FILE work.
+ * This helps isolate the changes to only the 32-bit code
+ * since 64-bit Solaris is not affected by this.
+ */
+#ifdef _LP64
+#define GET_FD(iop) ((iop)->_file)
+#define SET_FILE(iop, fd) ((iop)->_file = (fd))
+#else
+#define GET_FD(iop) \
+ (((iop)->__extendedfd) ? _file_get(iop) : (iop)->_magic)
+#define SET_FILE(iop, fd) (iop)->_magic = (fd); (iop)->__extendedfd = 0
+#endif
Also remove the 1k setrlimit(NOFILE) calls: that's the default on Linux,
with 64k on Illumos and 171k on FreeBSD
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13411
main(int argc, char **argv)
{
int c;
- struct rlimit rl = { 1024, 1024 };
spa_t *spa = NULL;
objset_t *os = NULL;
int dump_all = 1;
boolean_t target_is_spa = B_TRUE, dataset_lookup = B_FALSE;
nvlist_t *cfg = NULL;
- (void) setrlimit(RLIMIT_NOFILE, &rl);
- (void) enable_extended_FILE_stdio(-1, -1);
-
dprintf_setup(&argc, argv);
/*
fatal(B_TRUE, "fork failed");
if (pid == 0) { /* child */
- char *emptyargv[2] = { cmd, NULL };
char fd_data_str[12];
- struct rlimit rl = { 1024, 1024 };
- (void) setrlimit(RLIMIT_NOFILE, &rl);
-
(void) close(ztest_fd_rand);
VERIFY3S(11, >=,
snprintf(fd_data_str, 12, "%d", ztest_fd_data));
VERIFY0(setenv("ZTEST_FD_DATA", fd_data_str, 1));
- (void) enable_extended_FILE_stdio(-1, -1);
if (libpath != NULL)
VERIFY0(setenv("LD_LIBRARY_PATH", libpath, 1));
- (void) execv(cmd, emptyargv);
+ (void) execl(cmd, cmd, (char *)NULL);
ztest_dump_core = B_FALSE;
fatal(B_TRUE, "exec failed: %s", cmd);
}
%D%/limits.h \
%D%/locale.h \
%D%/statcommon.h \
- %D%/stdio.h \
%D%/stdlib.h \
%D%/string.h \
%D%/stropts.h \
+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License"). You may not use this file except in compliance
- * with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-#include_next <stdio.h>
-
-#ifndef _LIBSPL_STDIO_H
-#define _LIBSPL_STDIO_H
-
-#define enable_extended_FILE_stdio(fd, sig) ((void) 0)
-
-#endif