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      1 /*
      2  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote products
     14  *    derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "tests.h"
     29 #include <asm/unistd.h>
     30 
     31 #ifdef __NR_getdents
     32 
     33 # include <assert.h>
     34 # include <dirent.h>
     35 # include <fcntl.h>
     36 # include <stddef.h>
     37 # include <stdio.h>
     38 # include <sys/stat.h>
     39 # include <unistd.h>
     40 
     41 static const char fname[] =
     42 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     43 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     44 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     45 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     46 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     47 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     48 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
     49 	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nZ";
     50 static const char qname[] =
     51 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     52 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     53 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     54 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     55 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     56 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     57 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
     58 	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nZ";
     59 
     60 static char buf[8192];
     61 
     62 static const char *
     63 str_d_type(const unsigned char d_type)
     64 {
     65 	switch (d_type) {
     66 		case DT_DIR:
     67 			return "DT_DIR";
     68 		case DT_REG:
     69 			return "DT_REG";
     70 		default:
     71 			return "DT_UNKNOWN";
     72 	}
     73 }
     74 static void
     75 print_dirent(const kernel_dirent *d)
     76 {
     77 	const unsigned int d_name_offset = offsetof(kernel_dirent, d_name);
     78 	int d_name_len = d->d_reclen - d_name_offset - 1;
     79 	assert(d_name_len > 0);
     80 
     81 	printf("{d_ino=%llu, d_off=%llu, d_reclen=%u, d_name=",
     82 	       (unsigned long long) d->d_ino,
     83 	       (unsigned long long) d->d_off, d->d_reclen);
     84 
     85 	if (d->d_name[0] == '.')
     86 		printf("\"%.*s\"", d_name_len, d->d_name);
     87 	else
     88 		printf("\"%s\"", qname);
     89 
     90 	printf(", d_type=%s}",
     91 	       str_d_type(*((const char *) d + d->d_reclen - 1)));
     92 }
     93 
     94 int
     95 main(int ac, const char **av)
     96 {
     97 	char *dname;
     98 
     99 	assert(ac == 1);
    100 	assert(asprintf(&dname, "%s.test.tmp.dir", av[0]) > 0);
    101 	assert(!mkdir(dname, 0700));
    102 	assert(!chdir(dname));
    103 	(void) close(0);
    104 	assert(!creat(fname, 0600));
    105 	assert(!close(0));
    106 	assert(!open(".", O_RDONLY | O_DIRECTORY));
    107 
    108 	unsigned long count = (unsigned long) 0xfacefeeddeadbeefULL;
    109 	long rc = syscall(__NR_getdents, (long) 0xdefacedffffffffULL, NULL,
    110 			  count);
    111 	printf("getdents(-1, NULL, %u) = %ld %s (%m)\n",
    112 	       (unsigned) count, rc, errno2name());
    113 
    114 	count = (unsigned long) 0xfacefeed00000000ULL | sizeof(buf);
    115 	while ((rc = syscall(__NR_getdents, 0, buf, count))) {
    116 		kernel_dirent *d;
    117 		long i;
    118 
    119 		if (rc < 0)
    120 			perror_msg_and_skip("getdents");
    121 		printf("getdents(0, [");
    122 		for (i = 0; i < rc; i += d->d_reclen) {
    123 			d = (kernel_dirent *) &buf[i];
    124 			if (i)
    125 				printf(", ");
    126 			print_dirent(d);
    127 		}
    128 		printf("], %u) = %ld\n", (unsigned) count, rc);
    129 	}
    130 	printf("getdents(0, [], %u) = 0\n", (unsigned) count);
    131 	puts("+++ exited with 0 +++");
    132 	assert(!unlink(fname));
    133 	assert(!chdir(".."));
    134 	assert(!rmdir(dname));
    135 
    136 	return 0;
    137 }
    138 
    139 #else
    140 
    141 SKIP_MAIN_UNDEFINED("__NR_getdents")
    142 
    143 #endif
    144