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53 lines
1.4 KiB
53 lines
1.4 KiB
// SPDX-License-Identifier: LGPL-2.1 |
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#undef _GNU_SOURCE |
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#include <string.h> |
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#include <stdio.h> |
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#include "event-parse.h" |
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#undef _PE |
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#define _PE(code, str) str |
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static const char * const tep_error_str[] = { |
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TEP_ERRORS |
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}; |
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#undef _PE |
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/* |
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* The tools so far have been using the strerror_r() GNU variant, that returns |
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* a string, be it the buffer passed or something else. |
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* |
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* But that, besides being tricky in cases where we expect that the function |
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* using strerror_r() returns the error formatted in a provided buffer (we have |
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* to check if it returned something else and copy that instead), breaks the |
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* build on systems not using glibc, like Alpine Linux, where musl libc is |
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* used. |
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* |
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* So, introduce yet another wrapper, str_error_r(), that has the GNU |
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* interface, but uses the portable XSI variant of strerror_r(), so that users |
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* rest asured that the provided buffer is used and it is what is returned. |
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*/ |
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int tep_strerror(struct tep_handle *tep __maybe_unused, |
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enum tep_errno errnum, char *buf, size_t buflen) |
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{ |
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const char *msg; |
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int idx; |
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if (!buflen) |
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return 0; |
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if (errnum >= 0) { |
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int err = strerror_r(errnum, buf, buflen); |
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buf[buflen - 1] = 0; |
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return err; |
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} |
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if (errnum <= __TEP_ERRNO__START || |
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errnum >= __TEP_ERRNO__END) |
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return -1; |
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idx = errnum - __TEP_ERRNO__START - 1; |
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msg = tep_error_str[idx]; |
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snprintf(buf, buflen, "%s", msg); |
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return 0; |
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}
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