2 * Check decoding of readv and writev syscalls.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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44 perror_msg_and_fail("pipe");
48 static const char w0_c[] = "012";
49 const char *w0_d = hexdump_strdup(w0_c);
50 void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c));
52 const void *efault = w0 + LENGTH_OF(w0_c);
54 static const char w1_c[] = "34567";
55 const char *w1_d = hexdump_strdup(w1_c);
56 void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
58 static const char w2_c[] = "89abcde";
59 const char *w2_d = hexdump_strdup(w2_c);
60 void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
62 assert(writev(1, efault, 42) == -1);
63 tprintf("writev(1, %p, 42) = -1 EFAULT (%m)\n", efault);
65 assert(readv(0, efault, 42) == -1);
66 tprintf("readv(0, %p, 42) = -1 EFAULT (%m)\n", efault);
68 static const char r0_c[] = "01234567";
69 const char *r0_d = hexdump_strdup(r0_c);
70 static const char r1_c[] = "89abcde";
71 const char *r1_d = hexdump_strdup(r1_c);
73 const struct iovec w_iov_[] = {
76 .iov_len = LENGTH_OF(w0_c)
79 .iov_len = LENGTH_OF(w1_c)
82 .iov_len = LENGTH_OF(w2_c)
85 const struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_));
87 assert(writev(1, w_iov, 0) == 0);
88 tprintf("writev(1, [], 0) = 0\n");
90 assert(writev(1, w_iov + ARRAY_SIZE(w_iov_) - 1, 2) == -1);
91 tprintf("writev(1, [{\"%s\", %u}, %p], 2) = -1 EFAULT (%m)\n",
92 w2_c, LENGTH_OF(w2_c), w_iov + ARRAY_SIZE(w_iov_));
94 const unsigned int w_len =
95 LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
97 assert(writev(1, w_iov, ARRAY_SIZE(w_iov_)) == (int) w_len);
99 tprintf("writev(1, [{\"%s\", %u}, {\"%s\", %u}"
100 ", {\"%s\", %u}], %u) = %u\n"
101 " * %u bytes in buffer 0\n"
102 " | 00000 %-49s %-16s |\n"
103 " * %u bytes in buffer 1\n"
104 " | 00000 %-49s %-16s |\n"
105 " * %u bytes in buffer 2\n"
106 " | 00000 %-49s %-16s |\n",
107 w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c),
108 w2_c, LENGTH_OF(w2_c), ARRAY_SIZE(w_iov_), w_len,
109 LENGTH_OF(w0_c), w0_d, w0_c,
110 LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c);
112 const unsigned int r_len = (w_len + 1) / 2;
113 void *r0 = tail_alloc(r_len);
114 const struct iovec r0_iov_[] = {
120 const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
122 assert(readv(0, r_iov, ARRAY_SIZE(r0_iov_)) == (int) r_len);
123 tprintf("readv(0, [{\"%s\", %u}], %u) = %u\n"
124 " * %u bytes in buffer 0\n"
125 " | 00000 %-49s %-16s |\n",
126 r0_c, r_len, ARRAY_SIZE(r0_iov_), r_len, r_len, r0_d, r0_c);
128 void *r1 = tail_alloc(r_len);
129 void *r2 = tail_alloc(w_len);
130 const struct iovec r1_iov_[] = {
140 r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
142 assert(readv(0, r_iov, ARRAY_SIZE(r1_iov_)) == (int) w_len - r_len);
143 tprintf("readv(0, [{\"%s\", %u}, {\"\", %u}], %u) = %u\n"
144 " * %u bytes in buffer 0\n"
145 " | 00000 %-49s %-16s |\n",
146 r1_c, r_len, w_len, ARRAY_SIZE(r1_iov_), w_len - r_len,
147 w_len - r_len, r1_d, r1_c);
150 tprintf("+++ exited with 0 +++\n");