| From | Willy Tarreau <> | Subject | [PATCH 23/42] tools/nolibc/stdio: add perror() to report the errno value | Date | Mon, 7 Feb 2022 17:23:35 +0100 |
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It doesn't contain the text for the error codes, but instead displays "errno=" followed by the errno value. Just like the regular errno, if a non-empty message is passed, it's placed followed with ": " on the output before the errno code. The message is emitted on stderr.
Signed-off-by: Willy Tarreau <w@1wt.eu> --- tools/include/nolibc/stdio.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h index a73cf24cb68d..5f1cf32470d3 100644 --- a/tools/include/nolibc/stdio.h +++ b/tools/include/nolibc/stdio.h @@ -286,4 +286,10 @@ int printf(const char *fmt, ...) return ret; } +static __attribute__((unused)) +void perror(const char *msg) +{ + fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno); +} + #endif /* _NOLIBC_STDIO_H */ -- 2.35.1
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