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tools/nolibc/stdio: add perror() to report the errno value

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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>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Willy Tarreau 2022-02-07 17:23:35 +01:00 committed by Paul E. McKenney
parent 51469d5ab3
commit acab7bcdb1
1 changed files with 6 additions and 0 deletions
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6
tools/include/nolibc/stdio.h
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@ -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 */