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t_dir.c revision 1.3 
      1 /* $NetBSD: t_dir.c,v 1.3 2011/06/11 18:03:18 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);
     43 
     44 ATF_TC_HEAD(seekdir, tc)
     45 {
     46 
     47 	atf_tc_set_md_var(tc, "descr",
     48 	    "Check telldir(3) and seekdir(3) for correct behavior (PR/24324)");
     49 }
     50 
     51 ATF_TC_BODY(seekdir, tc)
     52 {
     53 	DIR *dp;
     54 	char *wasname;
     55 	struct dirent *entry;
     56 	long here;
     57 
     58 	mkdir("t", 0755);
     59 	creat("t/a", 0600);
     60 	creat("t/b", 0600);
     61 	creat("t/c", 0600);
     62 
     63 	dp = opendir("t");
     64 	if ( dp == NULL)
     65 		atf_tc_fail("Could not open temp directory.");
     66 
     67 	/* skip two for . and .. */
     68 	entry = readdir(dp);
     69 	entry = readdir(dp);
     70 
     71 	/* get first entry */
     72 	entry = readdir(dp);
     73 	here = telldir(dp);
     74 
     75 	/* get second entry */
     76 	entry = readdir(dp);
     77 	wasname = strdup(entry->d_name);
     78 	if (wasname == NULL)
     79 		atf_tc_fail("cannot allocate memory");
     80 
     81 	/* get third entry */
     82 	entry = readdir(dp);
     83 
     84 	/* try to return to the position after the first entry */
     85 	seekdir(dp, here);
     86 	entry = readdir(dp);
     87 
     88 	if (entry == NULL)
     89 		atf_tc_fail("entry 1 not found");
     90 	if (strcmp(entry->d_name, wasname) != 0)
     91 		atf_tc_fail("1st seekdir found wrong name");
     92 
     93 	/* try again, and throw in a telldir() for good measure */
     94 	seekdir(dp, here);
     95 	here = telldir(dp);
     96 	entry = readdir(dp);
     97 
     98 	if (entry == NULL)
     99 		atf_tc_fail("entry 2 not found");
    100 	if (strcmp(entry->d_name, wasname) != 0)
    101 		atf_tc_fail("2nd seekdir found wrong name");
    102 
    103 	/* One more time, to make sure that telldir() doesn't affect result */
    104 	seekdir(dp, here);
    105 	entry = readdir(dp);
    106 
    107 	if (entry == NULL)
    108 		atf_tc_fail("entry 3 not found");
    109 	if (strcmp(entry->d_name, wasname) != 0)
    110 		atf_tc_fail("3rd seekdir found wrong name");
    111 
    112 	closedir(dp);
    113 }
    114 
    115 ATF_TC(telldir_leak);
    116 
    117 ATF_TC_HEAD(telldir_leak, tc)
    118 {
    119 
    120 	atf_tc_set_md_var(tc, "descr",
    121 	    "Check telldir(3) for memory leakage (PR/24324)");
    122 }
    123 
    124 ATF_TC_BODY(telldir_leak, tc)
    125 {
    126 	DIR *dp;
    127 	long loc;
    128 	char *memused;
    129 	int i;
    130 	int oktouse = 4096;
    131 
    132 	dp = opendir(".");
    133 	if (dp == NULL)
    134 		atf_tc_fail("Could not open current directory");
    135 
    136 	loc = telldir(dp);
    137 	memused = sbrk(0);
    138 	closedir(dp);
    139 
    140 	for (i = 0; i < 1000; i++) {
    141 		dp = opendir(".");
    142 		if (dp == NULL)
    143 			atf_tc_fail("Could not open current directory");
    144 
    145 		loc = telldir(dp);
    146 		closedir(dp);
    147 
    148 		if ((char *)sbrk(0) - memused > oktouse) {
    149 			(void)printf("Used %td extra bytes for %d telldir "
    150 			    "calls", ((char *)sbrk(0) - memused), i);
    151 			oktouse = (char *)sbrk(0) - memused;
    152 		}
    153 	}
    154 	if (oktouse > 4096) {
    155 		atf_tc_fail("Failure: leaked %d bytes", oktouse);
    156 	} else {
    157 		(void)printf("OK: used %td bytes\n", (char *)(sbrk(0))-memused);
    158 	}
    159 }
    160 
    161 ATF_TP_ADD_TCS(tp)
    162 {
    163 
    164 	ATF_TP_ADD_TC(tp, seekdir);
    165 	ATF_TP_ADD_TC(tp, telldir_leak);
    166 
    167 	return atf_no_error();
    168 }
    169