Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
c8b5f2c9 ACM |
2 | #undef _GNU_SOURCE |
3 | #include <string.h> | |
4 | #include <stdio.h> | |
5 | #include <linux/string.h> | |
6 | ||
7 | /* | |
8 | * The tools so far have been using the strerror_r() GNU variant, that returns | |
9 | * a string, be it the buffer passed or something else. | |
10 | * | |
11 | * But that, besides being tricky in cases where we expect that the function | |
12 | * using strerror_r() returns the error formatted in a provided buffer (we have | |
13 | * to check if it returned something else and copy that instead), breaks the | |
14 | * build on systems not using glibc, like Alpine Linux, where musl libc is | |
15 | * used. | |
16 | * | |
17 | * So, introduce yet another wrapper, str_error_r(), that has the GNU | |
18 | * interface, but uses the portable XSI variant of strerror_r(), so that users | |
19 | * rest asured that the provided buffer is used and it is what is returned. | |
20 | */ | |
21 | char *str_error_r(int errnum, char *buf, size_t buflen) | |
22 | { | |
23 | int err = strerror_r(errnum, buf, buflen); | |
24 | if (err) | |
854e55ad | 25 | snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, [buf], %zd)=%d", errnum, buflen, err); |
c8b5f2c9 ACM |
26 | return buf; |
27 | } |