2 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
35 # include <sys/types.h>
36 # include "gcc_compat.h"
38 /* Cached sysconf(_SC_PAGESIZE). */
39 size_t get_page_size(void);
41 /* Print message and strerror(errno) to stderr, then exit(1). */
42 void perror_msg_and_fail(const char *, ...)
43 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
44 /* Print message to stderr, then exit(1). */
45 void error_msg_and_fail(const char *, ...)
46 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
47 /* Print message to stderr, then exit(77). */
48 void error_msg_and_skip(const char *, ...)
49 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
50 /* Print message and strerror(errno) to stderr, then exit(77). */
51 void perror_msg_and_skip(const char *, ...)
52 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
55 * Allocate memory that ends on the page boundary.
56 * Pages allocated by this call are preceeded by an unmapped page
57 * and followed also by an unmapped page.
59 void *tail_alloc(const size_t)
60 ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1));
61 /* Allocate memory using tail_alloc, then memcpy. */
62 void *tail_memdup(const void *, const size_t)
63 ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((2));
65 /* Close stdin, move stdout to a non-standard descriptor, and print. */
66 void tprintf(const char *, ...)
67 ATTRIBUTE_FORMAT((printf, 1, 2));
69 /* Make a hexdump copy of C string */
70 const char *hexdump_strdup(const char *);
72 /* Make a hexdump copy of memory */
73 const char *hexdump_memdup(const char *, size_t);
75 /* Make a hexquoted copy of a string */
76 const char *hexquote_strndup(const char *, size_t);
78 /* Return inode number of socket descriptor. */
79 unsigned long inode_of_sockfd(int);
81 /* Print string in quoted form. */
82 void print_quoted_string(const char *);
84 /* Check whether given uid matches kernel overflowuid. */
85 void check_overflowuid(const int);
87 /* Check whether given gid matches kernel overflowgid. */
88 void check_overflowgid(const int);
90 /* Translate errno to its name. */
91 const char *errno2name(void);
93 /* Print flags in symbolic form according to xlat table. */
95 int printflags(const struct xlat *, const unsigned long long, const char *);
97 # define ARRAY_SIZE(arg) ((unsigned int) (sizeof(arg) / sizeof((arg)[0])))
98 # define LENGTH_OF(arg) ((unsigned int) sizeof(arg) - 1)
100 # define SKIP_MAIN_UNDEFINED(arg) \
101 int main(void) { error_msg_and_skip("undefined: %s", arg); }