85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <stdio.h>
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enum sprintrc_fmt {
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SPRINTRC_FMT_RAW,
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SPRINTRC_FMT_GREP,
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};
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/**
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* Provides pointer to static string buffer with printed return code in format
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* used by strace - with errno and error message.
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*
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* @param rc Return code.
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* @param fmt Output format. Currently, raw (used for diff matching) and grep
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* (for extended POSIX regex-based pattern matching) formats are
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* supported.
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* @return Pointer to (statically allocated) buffer containing decimal
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* representation of return code and errno/error message in case @rc
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* is equal to -1.
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*/
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static inline const char *
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sprintrc_ex(long rc, enum sprintrc_fmt fmt)
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{
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static const char *formats[] = {
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[SPRINTRC_FMT_RAW] = "-1 %s (%m)",
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[SPRINTRC_FMT_GREP] = "-1 %s \\(%m\\)",
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};
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static char buf[4096];
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if (rc == 0)
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return "0";
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int ret = (rc == -1)
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? snprintf(buf, sizeof(buf), formats[fmt], errno2name())
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: snprintf(buf, sizeof(buf), "%ld", rc);
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if (ret < 0)
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perror_msg_and_fail("snprintf");
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if ((size_t) ret >= sizeof(buf))
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error_msg_and_fail("snprintf overflow: got %d, expected"
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" no more than %zu", ret, sizeof(buf));
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return buf;
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}
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const char *
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sprintrc(long rc)
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{
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return sprintrc_ex(rc, SPRINTRC_FMT_RAW);
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}
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const char *
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sprintrc_grep(long rc)
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{
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return sprintrc_ex(rc, SPRINTRC_FMT_GREP);
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}
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