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t_dir.c revision 1.6 
      1 /* $NetBSD: t_dir.c,v 1.6 2013/10/19 17:45:00 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <atf-c.h>
     30 
     31 #include <assert.h>
     32 #include <dirent.h>
     33 #include <err.h>
     34 #include <fcntl.h>
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 #include <unistd.h>
     39 
     40 #include <sys/stat.h>
     41 
     42 ATF_TC(seekdir_basic);
     43 ATF_TC_HEAD(seekdir_basic, tc)
     44 {
     45 
     46 	atf_tc_set_md_var(tc, "descr", "Check telldir(3) and seekdir(3) "
     47 	    "for correct behavior (PR lib/24324)");
     48 }
     49 
     50 ATF_TC_BODY(seekdir_basic, tc)
     51 {
     52 	DIR *dp;
     53 	char *wasname;
     54 	struct dirent *entry;
     55 	long here;
     56 
     57 	mkdir("t", 0755);
     58 	creat("t/a", 0600);
     59 	creat("t/b", 0600);
     60 	creat("t/c", 0600);
     61 
     62 	dp = opendir("t");
     63 	if ( dp == NULL)
     64 		atf_tc_fail("Could not open temp directory.");
     65 
     66 	/* skip two for . and .. */
     67 	entry = readdir(dp);
     68 	entry = readdir(dp);
     69 
     70 	/* get first entry */
     71 	entry = readdir(dp);
     72 	here = telldir(dp);
     73 
     74 	/* get second entry */
     75 	entry = readdir(dp);
     76 	wasname = strdup(entry->d_name);
     77 	if (wasname == NULL)
     78 		atf_tc_fail("cannot allocate memory");
     79 
     80 	/* get third entry */
     81 	entry = readdir(dp);
     82 
     83 	/* try to return to the position after the first entry */
     84 	seekdir(dp, here);
     85 	entry = readdir(dp);
     86 
     87 	if (entry == NULL)
     88 		atf_tc_fail("entry 1 not found");
     89 	if (strcmp(entry->d_name, wasname) != 0)
     90 		atf_tc_fail("1st seekdir found wrong name");
     91 
     92 	/* try again, and throw in a telldir() for good measure */
     93 	seekdir(dp, here);
     94 	here = telldir(dp);
     95 	entry = readdir(dp);
     96 
     97 	if (entry == NULL)
     98 		atf_tc_fail("entry 2 not found");
     99 	if (strcmp(entry->d_name, wasname) != 0)
    100 		atf_tc_fail("2nd seekdir found wrong name");
    101 
    102 	/* One more time, to make sure that telldir() doesn't affect result */
    103 	seekdir(dp, here);
    104 	entry = readdir(dp);
    105 
    106 	if (entry == NULL)
    107 		atf_tc_fail("entry 3 not found");
    108 	if (strcmp(entry->d_name, wasname) != 0)
    109 		atf_tc_fail("3rd seekdir found wrong name");
    110 
    111 	closedir(dp);
    112 }
    113 
    114 ATF_TC(telldir_leak);
    115 ATF_TC_HEAD(telldir_leak, tc)
    116 {
    117 
    118 	atf_tc_set_md_var(tc, "descr",
    119 	    "Check telldir(3) for memory leakage (PR lib/24324)");
    120 }
    121 
    122 ATF_TC_BODY(telldir_leak, tc)
    123 {
    124 	DIR *dp;
    125 	char *memused;
    126 	int i;
    127 	int oktouse = 4096;
    128 
    129 	dp = opendir(".");
    130 	if (dp == NULL)
    131 		atf_tc_fail("Could not open current directory");
    132 
    133 	(void)telldir(dp);
    134 	memused = sbrk(0);
    135 	closedir(dp);
    136 
    137 	for (i = 0; i < 1000; i++) {
    138 		dp = opendir(".");
    139 		if (dp == NULL)
    140 			atf_tc_fail("Could not open current directory");
    141 
    142 		(void)telldir(dp);
    143 		closedir(dp);
    144 
    145 		if ((char *)sbrk(0) - memused > oktouse) {
    146 			(void)printf("Used %td extra bytes for %d telldir "
    147 			    "calls", ((char *)sbrk(0) - memused), i);
    148 			oktouse = (char *)sbrk(0) - memused;
    149 		}
    150 	}
    151 	if (oktouse > 4096) {
    152 		atf_tc_fail("Failure: leaked %d bytes", oktouse);
    153 	} else {
    154 		(void)printf("OK: used %td bytes\n", (char *)(sbrk(0))-memused);
    155 	}
    156 }
    157 
    158 ATF_TP_ADD_TCS(tp)
    159 {
    160 
    161 	ATF_TP_ADD_TC(tp, seekdir_basic);
    162 	ATF_TP_ADD_TC(tp, telldir_leak);
    163 
    164 	return atf_no_error();
    165 }
    166