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