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
14 * documentation and/or other materials provided with the distribution.
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
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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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25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 static const char w1_c[] = "34567";
53 const char *w1_d = hexdump_strdup(w1_c);
54 void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
56 static const char w2_c[] = "89abcde";
57 const char *w2_d = hexdump_strdup(w2_c);
58 void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
60 static const char r0_c[] = "01234567";
61 const char *r0_d = hexdump_strdup(r0_c);
62 static const char r1_c[] = "89abcde";
63 const char *r1_d = hexdump_strdup(r1_c);
65 const struct iovec w_iov_[] = {
68 .iov_len = LENGTH_OF(w0_c)
71 .iov_len = LENGTH_OF(w1_c)
74 .iov_len = LENGTH_OF(w2_c)
77 const struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_));
78 const unsigned int w_len =
79 LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
81 assert(writev(1, w_iov, ARRAY_SIZE(w_iov_)) == (int) w_len);
83 tprintf("writev(1, [{\"%s\", %u}, {\"%s\", %u}"
84 ", {\"%s\", %u}], %u) = %u\n"
85 " * %u bytes in buffer 0\n"
86 " | 00000 %-49s %-16s |\n"
87 " * %u bytes in buffer 1\n"
88 " | 00000 %-49s %-16s |\n"
89 " * %u bytes in buffer 2\n"
90 " | 00000 %-49s %-16s |\n",
91 w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c),
92 w2_c, LENGTH_OF(w2_c), ARRAY_SIZE(w_iov_), w_len,
93 LENGTH_OF(w0_c), w0_d, w0_c,
94 LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c);
96 const unsigned int r_len = (w_len + 1) / 2;
97 void *r0 = tail_alloc(r_len);
98 const struct iovec r0_iov_[] = {
104 const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
106 assert(readv(0, r_iov, ARRAY_SIZE(r0_iov_)) == (int) r_len);
107 tprintf("readv(0, [{\"%s\", %u}], %u) = %u\n"
108 " * %u bytes in buffer 0\n"
109 " | 00000 %-49s %-16s |\n",
110 r0_c, r_len, ARRAY_SIZE(r0_iov_), r_len, r_len, r0_d, r0_c);
112 void *r1 = tail_alloc(r_len);
113 void *r2 = tail_alloc(w_len);
114 const struct iovec r1_iov_[] = {
124 r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
126 assert(readv(0, r_iov, ARRAY_SIZE(r1_iov_)) == (int) w_len - r_len);
127 tprintf("readv(0, [{\"%s\", %u}, {\"\", %u}], %u) = %u\n"
128 " * %u bytes in buffer 0\n"
129 " | 00000 %-49s %-16s |\n",
130 r1_c, r_len, w_len, ARRAY_SIZE(r1_iov_), w_len - r_len,
131 w_len - r_len, r1_d, r1_c);
134 tprintf("+++ exited with 0 +++\n");