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libc/stdio: Fail fdopen() on an execute-only fd.

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An execute-only fd (opened with O_EXEC) allows neither read() nor write()
and is therefore incompatible with all stdio modes. Therefore, the [EINVAL]
error applies.

Also adjust the similar check in freopen() with a NULL path, even though
this checks an fd which is already from a FILE.
This commit is contained in:
Jilles Tjoelker 2014-04-21 17:40:23 +00:00
parent 5414282b4d
commit 93a65e1b5f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=264737
7 changed files with 242 additions and 4 deletions
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3
lib/libc/stdio/fdopen.c
View File

@ -70,7 +70,8 @@ fdopen(int fd, const char *mode)
/* Make sure the mode the user wants is a subset of the actual mode. */
if ((fdflags = _fcntl(fd, F_GETFL, 0)) < 0)
return (NULL);
tmp = fdflags & O_ACCMODE;
/* Work around incorrect O_ACCMODE. */
tmp = fdflags & (O_ACCMODE | O_EXEC);
if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) {
errno = EINVAL;
return (NULL);

5
lib/libc/stdio/freopen.c
View File

@ -92,8 +92,9 @@ freopen(const char * __restrict file, const char * __restrict mode,
errno = sverrno;
return (NULL);
}
if ((dflags & O_ACCMODE) != O_RDWR && (dflags & O_ACCMODE) !=
(oflags & O_ACCMODE)) {
/* Work around incorrect O_ACCMODE. */
if ((dflags & O_ACCMODE) != O_RDWR &&
(dflags & (O_ACCMODE | O_EXEC)) != (oflags & O_ACCMODE)) {
fclose(fp);
FUNLOCKFILE(fp);
errno = EINVAL;

4
tools/regression/lib/libc/stdio/Makefile
View File

@ -1,7 +1,9 @@
# $FreeBSD$
TESTS= test-fmemopen \
TESTS= test-fdopen \
test-fmemopen \
test-fopen \
test-freopen \
test-getdelim \
test-mkostemp \
test-open_memstream \

105
tools/regression/lib/libc/stdio/test-fdopen.c Normal file
View File

@ -0,0 +1,105 @@
/*-
* Copyright (c) 2014 Jilles Tjoelker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static int testnum = 1;
static void
runtest(const char *fname, int intmode, const char *strmode, bool success)
{
FILE *fp;
int fd;
fd = open(fname, intmode);
if (fd == -1) {
printf("not ok %d - open(\"%s\", %#x) failed\n",
testnum++, fname, intmode);
return;
}
fp = fdopen(fd, strmode);
if (fp == NULL) {
close(fd);
if (success)
printf("not ok %d - "
"fdopen(open(\"%s\", %#x), \"%s\") failed\n",
testnum++, fname, intmode, strmode);
else
printf("ok %d - "
"fdopen(open(\"%s\", %#x), \"%s\") failed\n",
testnum++, fname, intmode, strmode);
return;
}
if (success)
printf("ok %d - "
"fdopen(open(\"%s\", %#x), \"%s\") succeeded\n",
testnum++, fname, intmode, strmode);
else
printf("not ok %d - "
"fdopen(open(\"%s\", %#x), \"%s\") succeeded\n",
testnum++, fname, intmode, strmode);
fclose(fp);
}
/*
* Test program for fdopen().
*/
int
main(int argc, char *argv[])
{
printf("1..19\n");
runtest("/dev/null", O_RDONLY, "r", true);
runtest("/dev/null", O_WRONLY, "r", false);
runtest("/dev/null", O_RDWR, "r", true);
runtest("/dev/null", O_RDONLY, "w", false);
runtest("/dev/null", O_WRONLY, "w", true);
runtest("/dev/null", O_RDWR, "w", true);
runtest("/dev/null", O_RDONLY, "a", false);
runtest("/dev/null", O_WRONLY, "a", true);
runtest("/dev/null", O_RDWR, "a", true);
runtest("/dev/null", O_RDONLY, "r+", false);
runtest("/dev/null", O_WRONLY, "r+", false);
runtest("/dev/null", O_RDWR, "r+", true);
runtest("/dev/null", O_RDONLY, "w+", false);
runtest("/dev/null", O_WRONLY, "w+", false);
runtest("/dev/null", O_RDWR, "w+", true);
runtest("/bin/sh", O_EXEC, "r", false);
runtest("/bin/sh", O_EXEC, "w", false);
runtest("/bin/sh", O_EXEC, "r+", false);
runtest("/bin/sh", O_EXEC, "w+", false);
return 0;
}
/* vim:ts=8:cin:sw=8
* */

10
tools/regression/lib/libc/stdio/test-fdopen.t Normal file
View File

@ -0,0 +1,10 @@
#!/bin/sh
# $FreeBSD$
cd `dirname $0`
executable=`basename $0 .t`
make $executable 2>&1 > /dev/null
exec ./$executable

109
tools/regression/lib/libc/stdio/test-freopen.c Normal file
View File

@ -0,0 +1,109 @@
/*-
* Copyright (c) 2014 Jilles Tjoelker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
static int testnum = 1;
static void
runtest(const char *fname1, const char *mode1, const char *fname2,
const char *mode2, bool success)
{
FILE *fp1, *fp2;
const char *fname2_print;
fname2_print = fname2 != NULL ? fname2 : "<NULL>";
fp1 = fopen(fname1, mode1);
if (fp1 == NULL) {
printf("not ok %d - fopen(\"%s\", \"%s\") failed\n",
testnum++, fname1, mode1);
return;
}
fp2 = freopen(fname2, mode2, fp1);
if (fp2 == NULL) {
fclose(fp1);
if (success)
printf("not ok %d - "
"freopen(\"%s\", \"%s\", fopen(\"%s\", \"%s\")) "
"failed\n",
testnum++, fname2_print, mode2, fname1, mode1);
else
printf("ok %d - "
"freopen(\"%s\", \"%s\", fopen(\"%s\", \"%s\")) "
"failed\n",
testnum++, fname2_print, mode2, fname1, mode1);
return;
}
if (success)
printf("ok %d - "
"freopen(\"%s\", \"%s\", fopen(\"%s\", \"%s\")) "
"succeeded\n",
testnum++, fname2_print, mode2, fname1, mode1);
else
printf("not ok %d - "
"freopen(\"%s\", \"%s\", fopen(\"%s\", \"%s\")) "
"succeeded\n",
testnum++, fname2_print, mode2, fname1, mode1);
fclose(fp2);
}
/*
* Test program for freopen().
*/
int
main(int argc, char *argv[])
{
printf("1..19\n");
runtest("/dev/null", "r", NULL, "r", true);
runtest("/dev/null", "w", NULL, "r", false);
runtest("/dev/null", "r+", NULL, "r", true);
runtest("/dev/null", "r", NULL, "w", false);
runtest("/dev/null", "w", NULL, "w", true);
runtest("/dev/null", "r+", NULL, "w", true);
runtest("/dev/null", "r", NULL, "a", false);
runtest("/dev/null", "w", NULL, "a", true);
runtest("/dev/null", "r+", NULL, "a", true);
runtest("/dev/null", "r", NULL, "r+", false);
runtest("/dev/null", "w", NULL, "r+", false);
runtest("/dev/null", "r+", NULL, "r+", true);
runtest("/dev/null", "r", NULL, "w+", false);
runtest("/dev/null", "w", NULL, "w+", false);
runtest("/dev/null", "r+", NULL, "w+", true);
runtest("/bin/sh", "r", NULL, "r", true);
runtest("/bin/sh", "r", "/bin/sh", "r", true);
runtest("/bin/sh", "r", "/dev/null", "r", true);
runtest("/bin/sh", "r", "/dev/null", "w", true);
return 0;
}
/* vim:ts=8:cin:sw=8
* */

10
tools/regression/lib/libc/stdio/test-freopen.t Normal file
View File

@ -0,0 +1,10 @@
#!/bin/sh
# $FreeBSD$
cd `dirname $0`
executable=`basename $0 .t`
make $executable 2>&1 > /dev/null
exec ./$executable