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      1 /*	$NetBSD: t_fcntl.c,v 1.4 2023/08/05 08:05:16 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2019 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/types.h>
     34 #include <sys/mman.h>
     35 #include <atf-c.h>
     36 #include <fcntl.h>
     37 #include <errno.h>
     38 #include <stdlib.h>
     39 #include <string.h>
     40 #include <unistd.h>
     41 
     42 ATF_TC(getpath_vnode);
     43 ATF_TC_HEAD(getpath_vnode, tc)
     44 {
     45 
     46 	atf_tc_set_md_var(tc, "descr", "Checks fcntl(2) F_GETPATH for vnodes");
     47 }
     48 
     49 static const struct {
     50 	const char *name;
     51 	int rv;
     52 } files[] = {
     53 	{ "/bin/ls", 0 },
     54 	{ "/bin/sh", 0 },
     55 	{ "/dev/zero", 0 },
     56 	{ "/dev/null", 0 },
     57 	{ "/sbin/chown", 0 },
     58 	{ "/", ENOENT },
     59 };
     60 
     61 ATF_TC_BODY(getpath_vnode, tc)
     62 {
     63 	char path[MAXPATHLEN];
     64 	int fd, rv;
     65 
     66 	for (size_t i = 0; i < __arraycount(files); i++) {
     67 		fd = open(files[i].name, O_RDONLY|O_NOFOLLOW);
     68 		ATF_REQUIRE_MSG(fd != -1, "Cannot open `%s'", files[i].name);
     69 		rv = fcntl(fd, F_GETPATH, path);
     70 		if (files[i].rv) {
     71 			ATF_REQUIRE_MSG(errno == files[i].rv,
     72 			    "Unexpected error %d != %d for `%s'", errno,
     73 			    files[i].rv, files[i].name);
     74 		} else {
     75 			ATF_REQUIRE_MSG(rv != -1,
     76 			    "Can't get path for `%s' (%s)", files[i].name,
     77 			    strerror(errno));
     78 			ATF_REQUIRE_MSG(strcmp(files[i].name, path) == 0,
     79 			    "Bad name `%s' != `%s'", path, files[i].name);
     80 		close(fd);
     81 		}
     82 	}
     83 }
     84 
     85 ATF_TC(getpath_memfd);
     86 ATF_TC_HEAD(getpath_memfd, tc)
     87 {
     88 
     89 	atf_tc_set_md_var(tc, "descr",
     90 	    "Checks fcntl(2) F_GETPATH for fds created by memfd_create");
     91 }
     92 
     93 #define	MEMFD_NAME(name)	{ name, "memfd:" name }
     94 static const struct {
     95 	const char *bare;
     96 	const char *prefixed;
     97 } memfd_names[] = {
     98 	MEMFD_NAME(""),
     99 	MEMFD_NAME("some text"),
    100 	MEMFD_NAME("memfd:"),
    101 	MEMFD_NAME("../\\"),
    102 };
    103 
    104 ATF_TC_BODY(getpath_memfd, tc)
    105 {
    106 	char path[MAXPATHLEN];
    107 	int fd, rv;
    108 
    109 	for (size_t i = 0; i < __arraycount(memfd_names); i++) {
    110 		fd = memfd_create(memfd_names[i].bare, 0);
    111 		ATF_CHECK_MSG(fd != -1, "Failed to create memfd (%s)",
    112 		    strerror(errno));
    113 		if (fd == -1)
    114 			continue;
    115 		rv = fcntl(fd, F_GETPATH, path);
    116 		ATF_CHECK_MSG(rv != -1, "Can't get path `%s' (%s)",
    117 		    memfd_names[i].bare, strerror(errno));
    118 		if (rv == -1)
    119 			goto next;
    120 		ATF_CHECK_MSG(strcmp(memfd_names[i].prefixed, path) == 0,
    121 		    "Bad name `%s' != `%s'", path, memfd_names[i].prefixed);
    122 next:		close(fd);
    123 	}
    124 }
    125 
    126 ATF_TP_ADD_TCS(tp)
    127 {
    128 	ATF_TP_ADD_TC(tp, getpath_vnode);
    129 	ATF_TP_ADD_TC(tp, getpath_memfd);
    130 
    131 	return atf_no_error();
    132 }
    133