/usr/include/x86_64-linux-musl/err.h is in musl-dev 0.9.15-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | #ifndef _ERR_H
#define _ERR_H
#include <features.h>
#include <stdarg.h>
#ifdef __cplusplus
extern "C" {
#endif
void warn(const char *, ...);
void vwarn(const char *, va_list);
void warnx(const char *, ...);
void vwarnx(const char *, va_list);
_Noreturn void err(int, const char *, ...);
_Noreturn void verr(int, const char *, va_list);
_Noreturn void errx(int, const char *, ...);
_Noreturn void verrx(int, const char *, va_list);
#ifdef __cplusplus
}
#endif
#endif
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