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tests/sprintrc.c
65 строк
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Dmitry V. Levin
Update copyright headers
26 апр 2026, 10:00
26 апр 2026, 10:00
d4c4467
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/* * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com> * Copyright (c) 2016-2026 The strace developers. * All rights reserved. * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "tests.h" #include <stdio.h> #include <errno.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 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(errno)) : 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); }