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      1 /*	$NetBSD: t_mknodat.c,v 1.4 2017/01/10 15:15:09 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Emmanuel Dreyfus.
      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 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: t_mknodat.c,v 1.4 2017/01/10 15:15:09 christos Exp $");
     33 
     34 #include <atf-c.h>
     35 #include <errno.h>
     36 #include <fcntl.h>
     37 #include <limits.h>
     38 #include <paths.h>
     39 #include <stdio.h>
     40 #include <string.h>
     41 #include <unistd.h>
     42 #include <sys/param.h>
     43 #include <sys/stat.h>
     44 
     45 #define DIR "dir"
     46 #define FILE "dir/openat"
     47 #define BASEFILE "openat"
     48 #define FILEERR "dir/openaterr"
     49 
     50 static dev_t get_devnull(void);
     51 
     52 static dev_t
     53 get_devnull(void)
     54 {
     55 	struct stat st;
     56 
     57 	if (stat(_PATH_DEVNULL, &st) != 0)
     58 		return NODEV;
     59 
     60 	return st.st_rdev;
     61 }
     62 
     63 
     64 ATF_TC(mknodat_fd);
     65 ATF_TC_HEAD(mknodat_fd, tc)
     66 {
     67 	atf_tc_set_md_var(tc, "descr", "See that mknodat works with fd");
     68 	atf_tc_set_md_var(tc, "require.user", "root");
     69 }
     70 ATF_TC_BODY(mknodat_fd, tc)
     71 {
     72 	int dfd;
     73 	int fd;
     74 	dev_t dev;
     75 	mode_t mode = S_IFCHR|0600;
     76 
     77 	ATF_REQUIRE((dev = get_devnull()) != NODEV);
     78 	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
     79 	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
     80 	ATF_REQUIRE((fd = mknodat(dfd, BASEFILE, mode, dev)) != -1);
     81 	ATF_REQUIRE(close(fd) == 0);
     82 	ATF_REQUIRE(access(FILE, F_OK) == 0);
     83 	(void)close(dfd);
     84 }
     85 
     86 ATF_TC(mknodat_fdcwd);
     87 ATF_TC_HEAD(mknodat_fdcwd, tc)
     88 {
     89 	atf_tc_set_md_var(tc, "descr",
     90 			  "See that mknodat works with fd as AT_FDCWD");
     91 	atf_tc_set_md_var(tc, "require.user", "root");
     92 }
     93 ATF_TC_BODY(mknodat_fdcwd, tc)
     94 {
     95 	int fd;
     96 	dev_t dev;
     97 	mode_t mode = S_IFCHR|0600;
     98 
     99 	ATF_REQUIRE((dev = get_devnull()) != NODEV);
    100 	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
    101 	ATF_REQUIRE((fd = mknodat(AT_FDCWD, FILE, mode, dev)) != -1);
    102 	ATF_REQUIRE(close(fd) == 0);
    103 	ATF_REQUIRE(access(FILE, F_OK) == 0);
    104 }
    105 
    106 ATF_TC(mknodat_fdcwderr);
    107 ATF_TC_HEAD(mknodat_fdcwderr, tc)
    108 {
    109 	atf_tc_set_md_var(tc, "descr",
    110 		  "See that mknodat fails with fd as AT_FDCWD and bad path");
    111 	atf_tc_set_md_var(tc, "require.user", "root");
    112 }
    113 ATF_TC_BODY(mknodat_fdcwderr, tc)
    114 {
    115 	int fd;
    116 	dev_t dev;
    117 	mode_t mode = S_IFCHR|0600;
    118 
    119 	ATF_REQUIRE((dev = get_devnull()) != NODEV);
    120 	ATF_REQUIRE((fd = mknodat(AT_FDCWD, FILEERR, mode, dev)) == -1);
    121 }
    122 
    123 ATF_TC(mknodat_fderr);
    124 ATF_TC_HEAD(mknodat_fderr, tc)
    125 {
    126 	atf_tc_set_md_var(tc, "descr", "See that mknodat fails with fd as -1");
    127 	atf_tc_set_md_var(tc, "require.user", "root");
    128 }
    129 ATF_TC_BODY(mknodat_fderr, tc)
    130 {
    131 	int fd;
    132 	dev_t dev;
    133 	mode_t mode = S_IFCHR|0600;
    134 
    135 	ATF_REQUIRE((dev = get_devnull()) != NODEV);
    136 	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
    137 	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
    138 	ATF_REQUIRE(close(fd) == 0);
    139 	ATF_REQUIRE((fd = mknodat(-1, FILE, mode, dev)) == -1);
    140 }
    141 
    142 ATF_TP_ADD_TCS(tp)
    143 {
    144 
    145 	ATF_TP_ADD_TC(tp, mknodat_fd);
    146 	ATF_TP_ADD_TC(tp, mknodat_fdcwd);
    147 	ATF_TP_ADD_TC(tp, mknodat_fdcwderr);
    148 	ATF_TP_ADD_TC(tp, mknodat_fderr);
    149 
    150 	return atf_no_error();
    151 }
    152