28 lines
1.0 KiB
C
28 lines
1.0 KiB
C
// 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;
|
|
}
|