// 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; }