This change refactors the Unix socket / pipe backend to have a ring buffer containing segments, where each segment has an optional leading ancillary buffer containing control messages followed by a normal data buffer. The SCM_RIGHTS control message has been implemented which transfers file descriptors to the receiving process. File descriptors are reference counted and cycles are prevented using the following restrictions: 1) Unix sockets cannot be sent on themselves (on either end). 2) Unix sockets themselves being sent cannot be sent on. 3) Unix sockets cannot send a Unix socket being sent on. This is a compatible ABI change.
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*
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* Copyright (c) 2014, 2017 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* test.h
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* Shared test utility functions.
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*/
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#ifndef TEST_H
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#define TEST_H
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#include <errno.h>
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#include <error.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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__attribute((noreturn, unused)) static inline
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void test_error(int errnum, const char* format, ...)
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{
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fprintf(stderr, "%s: ", program_invocation_name);
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va_list list;
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va_start(list, format);
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vfprintf(stderr, format, list);
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va_end(list);
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if ( errnum )
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fprintf(stderr, ": %s", strerror(errnum));
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fprintf(stderr, "\n");
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exit(1);
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}
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__attribute((unused))
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static inline void test_assertion(bool assertion,
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const char* file,
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unsigned int line,
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const char* assertion_string,
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int errnum)
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{
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if ( !assertion )
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test_error(errnum, "assertion failure: %s:%u: %s", file, line,
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assertion_string);
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}
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__attribute((unused))
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static inline void test_assertionp(int errnum,
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const char* file,
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unsigned int line,
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const char* assertion_string)
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{
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test_assertion(errnum == 0, file, line, assertion_string, errnum);
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}
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#define test_assert(x) test_assertion((x), __FILE__, __LINE__, #x, errno)
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#define test_assertc(x, errnum) \
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test_assertion((x), __FILE__, __LINE__, #x, errnum)
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#define test_assertp(x) test_assertionp((x), __FILE__, __LINE__, #x)
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#define test_assertx(x) test_assertion((x), __FILE__, __LINE__, #x, 0)
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#endif
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