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tools/nolibc/stdio: let perror work when NOLIBC_IGNORE_ERRNO is set

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There is no errno variable when NOLIBC_IGNORE_ERRNO is defined. As such,
simply print the message with "unknown error" rather than the integer
value of errno.

Fixes: acab7bcdb1bc ("tools/nolibc/stdio: add perror() to report the errno value")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Benjamin Berg 2025-09-24 16:20:50 +02:00 committed by Thomas Weißschuh
parent 089c0a9853
commit c485ca3aff
1 changed files with 4 additions and 0 deletions
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4
tools/include/nolibc/stdio.h
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@ -600,7 +600,11 @@ int sscanf(const char *str, const char *format, ...)
static __attribute__((unused))
void perror(const char *msg)
{
#ifdef NOLIBC_IGNORE_ERRNO
fprintf(stderr, "%s%sunknown error\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "");
#else
fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno);
#endif
}
static __attribute__((unused))