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
13 * notice, this list of conditions and the following disclaimer in the
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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.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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45 perror_msg_and_fail("pipe");
49 static const char w0_c[] = "012";
50 const char *w0_d = hexdump_strdup(w0_c);
51 void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c));
53 const void *efault = w0 + LENGTH_OF(w0_c);
55 static const char w1_c[] = "34567";
56 const char *w1_d = hexdump_strdup(w1_c);
57 void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
59 static const char w2_c[] = "89abcde";
60 const char *w2_d = hexdump_strdup(w2_c);
61 void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
63 assert(writev(1, efault, 42) == -1);
64 tprintf("writev(1, %p, 42) = -1 %s (%m)\n",
65 efault, errno2name());
67 assert(readv(0, efault, 42) == -1);
68 tprintf("readv(0, %p, 42) = -1 %s (%m)\n",
69 efault, errno2name());
71 static const char r0_c[] = "01234567";
72 const char *r0_d = hexdump_strdup(r0_c);
73 static const char r1_c[] = "89abcde";
74 const char *r1_d = hexdump_strdup(r1_c);
76 const struct iovec w_iov_[] = {
79 .iov_len = LENGTH_OF(w0_c)
82 .iov_len = LENGTH_OF(w1_c)
85 .iov_len = LENGTH_OF(w2_c)
88 const struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_));
90 assert(writev(1, w_iov, 0) == 0);
91 tprintf("writev(1, [], 0) = 0\n");
93 assert(writev(1, w_iov + ARRAY_SIZE(w_iov_) - 1, 2) == -1);
94 tprintf("writev(1, [{\"%s\", %u}, %p], 2) = -1 %s (%m)\n",
95 w2_c, LENGTH_OF(w2_c), w_iov + ARRAY_SIZE(w_iov_),
98 const unsigned int w_len =
99 LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
101 assert(writev(1, w_iov, ARRAY_SIZE(w_iov_)) == (int) w_len);
103 tprintf("writev(1, [{\"%s\", %u}, {\"%s\", %u}"
104 ", {\"%s\", %u}], %u) = %u\n"
105 " * %u bytes in buffer 0\n"
106 " | 00000 %-49s %-16s |\n"
107 " * %u bytes in buffer 1\n"
108 " | 00000 %-49s %-16s |\n"
109 " * %u bytes in buffer 2\n"
110 " | 00000 %-49s %-16s |\n",
111 w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c),
112 w2_c, LENGTH_OF(w2_c), ARRAY_SIZE(w_iov_), w_len,
113 LENGTH_OF(w0_c), w0_d, w0_c,
114 LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c);
116 const unsigned int r_len = (w_len + 1) / 2;
117 void *r0 = tail_alloc(r_len);
118 const struct iovec r0_iov_[] = {
124 const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
126 assert(readv(0, r_iov, ARRAY_SIZE(r0_iov_)) == (int) r_len);
127 tprintf("readv(0, [{\"%s\", %u}], %u) = %u\n"
128 " * %u bytes in buffer 0\n"
129 " | 00000 %-49s %-16s |\n",
130 r0_c, r_len, ARRAY_SIZE(r0_iov_), r_len, r_len, r0_d, r0_c);
132 void *r1 = tail_alloc(r_len);
133 void *r2 = tail_alloc(w_len);
134 const struct iovec r1_iov_[] = {
144 r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
146 assert(readv(0, r_iov, ARRAY_SIZE(r1_iov_)) == (int) w_len - r_len);
147 tprintf("readv(0, [{\"%s\", %u}, {\"\", %u}], %u) = %u\n"
148 " * %u bytes in buffer 0\n"
149 " | 00000 %-49s %-16s |\n",
150 r1_c, r_len, w_len, ARRAY_SIZE(r1_iov_), w_len - r_len,
151 w_len - r_len, r1_d, r1_c);
154 tprintf("+++ exited with 0 +++\n");