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| // SPDX-License-Identifier: GPL-2.0
| #undef _GNU_SOURCE
| #include <string.h>
| #include <stdio.h>
| #include <linux/string.h>
|
| /*
| * 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.
| */
| char *str_error_r(int errnum, char *buf, size_t buflen)
| {
| int err = strerror_r(errnum, buf, buflen);
| if (err)
| snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, [buf], %zd)=%d", errnum, buflen, err);
| return buf;
| }
|
|
