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