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t_mkfifo.c revision 1.2.42.1
      1  1.2.42.1  martin /* $NetBSD: t_mkfifo.c,v 1.2.42.1 2020/04/13 08:05:27 martin Exp $ */
      2       1.1  jruoho 
      3       1.1  jruoho /*-
      4       1.1  jruoho  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5       1.1  jruoho  * All rights reserved.
      6       1.1  jruoho  *
      7       1.1  jruoho  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1  jruoho  * by Jukka Ruohonen.
      9       1.1  jruoho  *
     10       1.1  jruoho  * Redistribution and use in source and binary forms, with or without
     11       1.1  jruoho  * modification, are permitted provided that the following conditions
     12       1.1  jruoho  * are met:
     13       1.1  jruoho  * 1. Redistributions of source code must retain the above copyright
     14       1.1  jruoho  *    notice, this list of conditions and the following disclaimer.
     15       1.1  jruoho  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1  jruoho  *    notice, this list of conditions and the following disclaimer in the
     17       1.1  jruoho  *    documentation and/or other materials provided with the distribution.
     18       1.1  jruoho  *
     19       1.1  jruoho  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.1  jruoho  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.1  jruoho  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.1  jruoho  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.1  jruoho  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.1  jruoho  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.1  jruoho  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.1  jruoho  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.1  jruoho  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.1  jruoho  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.1  jruoho  * POSSIBILITY OF SUCH DAMAGE.
     30       1.1  jruoho  */
     31       1.1  jruoho #include <sys/cdefs.h>
     32  1.2.42.1  martin __RCSID("$NetBSD: t_mkfifo.c,v 1.2.42.1 2020/04/13 08:05:27 martin Exp $");
     33       1.1  jruoho 
     34       1.1  jruoho #include <sys/stat.h>
     35       1.1  jruoho #include <sys/wait.h>
     36       1.1  jruoho 
     37       1.1  jruoho #include <atf-c.h>
     38       1.1  jruoho #include <errno.h>
     39       1.1  jruoho #include <fcntl.h>
     40       1.1  jruoho #include <limits.h>
     41       1.1  jruoho #include <stdlib.h>
     42       1.1  jruoho #include <signal.h>
     43       1.1  jruoho #include <string.h>
     44       1.1  jruoho #include <unistd.h>
     45       1.1  jruoho 
     46       1.1  jruoho static const char	path[] = "fifo";
     47       1.1  jruoho static void		support(void);
     48       1.1  jruoho 
     49       1.1  jruoho static void
     50       1.1  jruoho support(void)
     51       1.1  jruoho {
     52       1.1  jruoho 
     53       1.1  jruoho 	errno = 0;
     54       1.1  jruoho 
     55       1.1  jruoho 	if (mkfifo(path, 0600) == 0) {
     56       1.1  jruoho 		ATF_REQUIRE(unlink(path) == 0);
     57       1.1  jruoho 		return;
     58       1.1  jruoho 	}
     59       1.1  jruoho 
     60       1.1  jruoho 	if (errno == EOPNOTSUPP)
     61       1.1  jruoho 		atf_tc_skip("the kernel does not support FIFOs");
     62       1.1  jruoho 	else {
     63       1.1  jruoho 		atf_tc_fail("mkfifo(2) failed");
     64       1.1  jruoho 	}
     65       1.1  jruoho }
     66       1.1  jruoho 
     67       1.1  jruoho ATF_TC_WITH_CLEANUP(mkfifo_block);
     68       1.1  jruoho ATF_TC_HEAD(mkfifo_block, tc)
     69       1.1  jruoho {
     70       1.1  jruoho 	atf_tc_set_md_var(tc, "descr", "Test that FIFOs block");
     71       1.1  jruoho }
     72       1.1  jruoho 
     73       1.1  jruoho ATF_TC_BODY(mkfifo_block, tc)
     74       1.1  jruoho {
     75       1.2  jruoho 	int sta, fd = -1;
     76       1.1  jruoho 	pid_t pid;
     77       1.1  jruoho 
     78       1.1  jruoho 	support();
     79       1.1  jruoho 
     80       1.1  jruoho 	ATF_REQUIRE(mkfifo(path, 0600) == 0);
     81       1.1  jruoho 
     82       1.1  jruoho 	pid = fork();
     83       1.1  jruoho 	ATF_REQUIRE(pid >= 0);
     84       1.1  jruoho 
     85       1.1  jruoho 	if (pid == 0) {
     86       1.1  jruoho 
     87       1.1  jruoho 		/*
     88       1.1  jruoho 		 * If we open the FIFO as read-only (write-only),
     89       1.1  jruoho 		 * the call should block until another process
     90       1.1  jruoho 		 * opens the FIFO for writing (reading).
     91       1.1  jruoho 		 */
     92       1.2  jruoho 		fd = open(path, O_RDONLY);
     93       1.1  jruoho 
     94       1.2  jruoho 		_exit(EXIT_FAILURE); /* NOTREACHED */
     95       1.1  jruoho 	}
     96       1.1  jruoho 
     97       1.1  jruoho 	(void)sleep(1);
     98       1.1  jruoho 
     99       1.1  jruoho 	ATF_REQUIRE(kill(pid, SIGKILL) == 0);
    100       1.1  jruoho 
    101       1.1  jruoho 	(void)wait(&sta);
    102       1.1  jruoho 
    103       1.1  jruoho 	if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != SIGKILL)
    104       1.1  jruoho 		atf_tc_fail("FIFO did not block");
    105       1.1  jruoho 
    106       1.2  jruoho 	(void)close(fd);
    107       1.1  jruoho 	(void)unlink(path);
    108       1.1  jruoho }
    109       1.1  jruoho 
    110       1.1  jruoho ATF_TC_CLEANUP(mkfifo_block, tc)
    111       1.1  jruoho {
    112       1.1  jruoho 	(void)unlink(path);
    113       1.1  jruoho }
    114       1.1  jruoho 
    115       1.1  jruoho ATF_TC_WITH_CLEANUP(mkfifo_err);
    116       1.1  jruoho ATF_TC_HEAD(mkfifo_err, tc)
    117       1.1  jruoho {
    118       1.1  jruoho 	atf_tc_set_md_var(tc, "descr", "Test erros from mkfifo(2)");
    119       1.1  jruoho }
    120       1.1  jruoho 
    121       1.1  jruoho ATF_TC_BODY(mkfifo_err, tc)
    122       1.1  jruoho {
    123       1.1  jruoho 	char buf[PATH_MAX + 1];
    124       1.1  jruoho 
    125       1.1  jruoho 	support();
    126       1.1  jruoho 
    127       1.1  jruoho 	(void)memset(buf, 'x', sizeof(buf));
    128       1.1  jruoho 	ATF_REQUIRE(mkfifo(path, 0600) == 0);
    129       1.1  jruoho 
    130       1.1  jruoho 	errno = 0;
    131       1.1  jruoho 	ATF_REQUIRE_ERRNO(EFAULT, mkfifo((char *)-1, 0600) == -1);
    132       1.1  jruoho 
    133       1.1  jruoho 	errno = 0;
    134       1.1  jruoho 	ATF_REQUIRE_ERRNO(EEXIST, mkfifo("/etc/passwd", 0600) == -1);
    135       1.1  jruoho 
    136       1.1  jruoho 	errno = 0;
    137       1.1  jruoho 	ATF_REQUIRE_ERRNO(EEXIST, mkfifo(path, 0600) == -1);
    138       1.1  jruoho 
    139       1.1  jruoho 	errno = 0;
    140       1.1  jruoho 	ATF_REQUIRE_ERRNO(ENAMETOOLONG, mkfifo(buf, 0600) == -1);
    141       1.1  jruoho 
    142       1.1  jruoho 	errno = 0;
    143       1.1  jruoho 	ATF_REQUIRE_ERRNO(ENOENT, mkfifo("/a/b/c/d/e/f/g", 0600) == -1);
    144       1.1  jruoho 
    145       1.1  jruoho 	ATF_REQUIRE(unlink(path) == 0);
    146       1.1  jruoho }
    147       1.1  jruoho 
    148       1.1  jruoho ATF_TC_CLEANUP(mkfifo_err, tc)
    149       1.1  jruoho {
    150       1.1  jruoho 	(void)unlink(path);
    151       1.1  jruoho }
    152       1.1  jruoho 
    153       1.1  jruoho ATF_TC_WITH_CLEANUP(mkfifo_nonblock);
    154       1.1  jruoho ATF_TC_HEAD(mkfifo_nonblock, tc)
    155       1.1  jruoho {
    156       1.1  jruoho 	atf_tc_set_md_var(tc, "descr", "Test O_NONBLOCK with FIFOs");
    157       1.1  jruoho }
    158       1.1  jruoho 
    159       1.1  jruoho ATF_TC_BODY(mkfifo_nonblock, tc)
    160       1.1  jruoho {
    161       1.1  jruoho 	int fd, sta;
    162       1.1  jruoho 	pid_t pid;
    163       1.1  jruoho 
    164       1.1  jruoho 	support();
    165       1.1  jruoho 
    166       1.1  jruoho 	fd = -1;
    167       1.1  jruoho 	ATF_REQUIRE(mkfifo(path, 0600) == 0);
    168       1.1  jruoho 
    169       1.1  jruoho 	pid = fork();
    170       1.1  jruoho 	ATF_REQUIRE(pid >= 0);
    171       1.1  jruoho 
    172       1.1  jruoho 	if (pid == 0) {
    173       1.1  jruoho 
    174       1.1  jruoho 		/*
    175       1.1  jruoho 		 * If we open the FIFO as O_NONBLOCK, the O_RDONLY
    176       1.1  jruoho 		 * call should return immediately, whereas the call
    177       1.1  jruoho 		 * for write-only should fail with ENXIO.
    178       1.1  jruoho 		 */
    179       1.1  jruoho 		fd = open(path, O_RDONLY | O_NONBLOCK);
    180       1.1  jruoho 
    181       1.1  jruoho 		if (fd >= 0)
    182       1.1  jruoho 			_exit(EXIT_SUCCESS);
    183       1.1  jruoho 
    184       1.1  jruoho 		(void)pause();	/* NOTREACHED */
    185       1.1  jruoho 	}
    186       1.1  jruoho 
    187       1.1  jruoho 	(void)sleep(1);
    188       1.1  jruoho 
    189       1.1  jruoho 	errno = 0;
    190       1.1  jruoho 	ATF_REQUIRE_ERRNO(ENXIO, open(path, O_WRONLY | O_NONBLOCK) == -1);
    191       1.1  jruoho 
    192       1.1  jruoho 	(void)kill(pid, SIGKILL);
    193       1.1  jruoho 	(void)wait(&sta);
    194       1.1  jruoho 
    195       1.1  jruoho 	if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL)
    196       1.1  jruoho 		atf_tc_fail("FIFO blocked for O_NONBLOCK open(2)");
    197       1.1  jruoho 
    198       1.1  jruoho 	(void)close(fd);
    199       1.1  jruoho 	(void)unlink(path);
    200       1.1  jruoho }
    201       1.1  jruoho 
    202       1.1  jruoho ATF_TC_CLEANUP(mkfifo_nonblock, tc)
    203       1.1  jruoho {
    204       1.1  jruoho 	(void)unlink(path);
    205       1.1  jruoho }
    206       1.1  jruoho 
    207       1.1  jruoho ATF_TC_WITH_CLEANUP(mkfifo_perm);
    208       1.1  jruoho ATF_TC_HEAD(mkfifo_perm, tc)
    209       1.1  jruoho {
    210       1.1  jruoho 	atf_tc_set_md_var(tc, "descr", "Test permissions with mkfifo(2)");
    211       1.1  jruoho 	atf_tc_set_md_var(tc, "require.user", "unprivileged");
    212       1.1  jruoho }
    213       1.1  jruoho 
    214       1.1  jruoho ATF_TC_BODY(mkfifo_perm, tc)
    215       1.1  jruoho {
    216       1.1  jruoho 
    217       1.1  jruoho 	support();
    218       1.1  jruoho 
    219       1.1  jruoho 	errno = 0;
    220       1.1  jruoho 	ATF_REQUIRE_ERRNO(EACCES, mkfifo("/root/fifo", 0600) == -1);
    221       1.1  jruoho 
    222       1.1  jruoho 	ATF_REQUIRE(mkfifo(path, 0600) == 0);
    223       1.1  jruoho 
    224       1.1  jruoho 	/*
    225       1.1  jruoho 	 * For some reason this fails with EFTYPE...
    226       1.1  jruoho 	 */
    227       1.1  jruoho 	errno = 0;
    228       1.1  jruoho 	ATF_REQUIRE_ERRNO(EFTYPE, chmod(path, 1777) == -1);
    229       1.1  jruoho 
    230       1.1  jruoho 	ATF_REQUIRE(unlink(path) == 0);
    231       1.1  jruoho }
    232       1.1  jruoho 
    233       1.1  jruoho ATF_TC_CLEANUP(mkfifo_perm, tc)
    234       1.1  jruoho {
    235       1.1  jruoho 	(void)unlink(path);
    236       1.1  jruoho }
    237       1.1  jruoho 
    238       1.1  jruoho ATF_TC_WITH_CLEANUP(mkfifo_stat);
    239       1.1  jruoho ATF_TC_HEAD(mkfifo_stat, tc)
    240       1.1  jruoho {
    241       1.1  jruoho 	atf_tc_set_md_var(tc, "descr", "Test mkfifo(2) with stat");
    242       1.1  jruoho }
    243       1.1  jruoho 
    244       1.1  jruoho ATF_TC_BODY(mkfifo_stat, tc)
    245       1.1  jruoho {
    246       1.1  jruoho 	struct stat st;
    247       1.1  jruoho 
    248       1.1  jruoho 	support();
    249       1.1  jruoho 
    250       1.1  jruoho 	(void)memset(&st, 0, sizeof(struct stat));
    251       1.1  jruoho 
    252       1.1  jruoho 	ATF_REQUIRE(mkfifo(path, 0600) == 0);
    253       1.1  jruoho 	ATF_REQUIRE(stat(path, &st) == 0);
    254       1.1  jruoho 
    255       1.1  jruoho 	if (S_ISFIFO(st.st_mode) == 0)
    256       1.1  jruoho 		atf_tc_fail("invalid mode from mkfifo(2)");
    257       1.1  jruoho 
    258       1.1  jruoho 	ATF_REQUIRE(unlink(path) == 0);
    259       1.1  jruoho }
    260       1.1  jruoho 
    261       1.1  jruoho ATF_TC_CLEANUP(mkfifo_stat, tc)
    262       1.1  jruoho {
    263       1.1  jruoho 	(void)unlink(path);
    264       1.1  jruoho }
    265       1.1  jruoho 
    266  1.2.42.1  martin ATF_TC_WITH_CLEANUP(mknod_s_ififo);
    267  1.2.42.1  martin ATF_TC_HEAD(mknod_s_ififo, tc)
    268  1.2.42.1  martin {
    269  1.2.42.1  martin 	atf_tc_set_md_var(tc, "descr", "Test mknod(2) with S_IFIFO");
    270  1.2.42.1  martin }
    271  1.2.42.1  martin 
    272  1.2.42.1  martin ATF_TC_BODY(mknod_s_ififo, tc)
    273  1.2.42.1  martin {
    274  1.2.42.1  martin 	struct stat st;
    275  1.2.42.1  martin 
    276  1.2.42.1  martin 	support();
    277  1.2.42.1  martin 
    278  1.2.42.1  martin 	(void)memset(&st, 0, sizeof(struct stat));
    279  1.2.42.1  martin 
    280  1.2.42.1  martin 	ATF_REQUIRE(mknod(path, S_IFIFO | 0600, 0) == 0);
    281  1.2.42.1  martin 	ATF_REQUIRE(stat(path, &st) == 0);
    282  1.2.42.1  martin 
    283  1.2.42.1  martin 	if (S_ISFIFO(st.st_mode) == 0)
    284  1.2.42.1  martin 		atf_tc_fail("invalid mode from mknod(2) with S_IFIFO");
    285  1.2.42.1  martin 
    286  1.2.42.1  martin 	ATF_REQUIRE(unlink(path) == 0);
    287  1.2.42.1  martin }
    288  1.2.42.1  martin 
    289  1.2.42.1  martin ATF_TC_CLEANUP(mknod_s_ififo, tc)
    290  1.2.42.1  martin {
    291  1.2.42.1  martin 	(void)unlink(path);
    292  1.2.42.1  martin }
    293  1.2.42.1  martin 
    294       1.1  jruoho ATF_TP_ADD_TCS(tp)
    295       1.1  jruoho {
    296       1.1  jruoho 
    297       1.1  jruoho 	ATF_TP_ADD_TC(tp, mkfifo_block);
    298       1.1  jruoho 	ATF_TP_ADD_TC(tp, mkfifo_err);
    299       1.1  jruoho 	ATF_TP_ADD_TC(tp, mkfifo_nonblock);
    300       1.1  jruoho 	ATF_TP_ADD_TC(tp, mkfifo_perm);
    301       1.1  jruoho 	ATF_TP_ADD_TC(tp, mkfifo_stat);
    302  1.2.42.1  martin 	ATF_TP_ADD_TC(tp, mknod_s_ififo);
    303       1.1  jruoho 
    304       1.1  jruoho 	return atf_no_error();
    305       1.1  jruoho }
    306