54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
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// SPDX-License-Identifier: LGPL-2.1
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#undef _GNU_SOURCE
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#include <string.h>
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#include <stdio.h>
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#include "event-parse.h"
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#undef _PE
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#define _PE(code, str) str
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static const char * const tep_error_str[] = {
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TEP_ERRORS
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};
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#undef _PE
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/*
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* The tools so far have been using the strerror_r() GNU variant, that returns
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* a string, be it the buffer passed or something else.
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*
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* But that, besides being tricky in cases where we expect that the function
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* using strerror_r() returns the error formatted in a provided buffer (we have
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* to check if it returned something else and copy that instead), breaks the
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* build on systems not using glibc, like Alpine Linux, where musl libc is
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* used.
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*
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* So, introduce yet another wrapper, str_error_r(), that has the GNU
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* interface, but uses the portable XSI variant of strerror_r(), so that users
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* rest asured that the provided buffer is used and it is what is returned.
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*/
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int tep_strerror(struct tep_handle *tep __maybe_unused,
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enum tep_errno errnum, char *buf, size_t buflen)
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{
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const char *msg;
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int idx;
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if (!buflen)
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return 0;
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if (errnum >= 0) {
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int err = strerror_r(errnum, buf, buflen);
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buf[buflen - 1] = 0;
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return err;
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}
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if (errnum <= __TEP_ERRNO__START ||
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errnum >= __TEP_ERRNO__END)
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return -1;
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idx = errnum - __TEP_ERRNO__START - 1;
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msg = tep_error_str[idx];
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snprintf(buf, buflen, "%s", msg);
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return 0;
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}
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