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