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err: Add err(), warn(), errx() and warnx() familiy of functions

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Some systems such as Windows or musl-libc based ones do not have these
BSD extensions. In addition libbsd itself is making use of the warnx()
functions, so we better provide these interfaces in case they are
missing.
This commit is contained in:
Guillem Jover
2019-08-06 15:49:41 +02:00
parent 9628798d7d
commit 5745ca0362
3 changed files with 113 additions and 0 deletions
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24
include/bsd/err.h
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@@ -29,11 +29,15 @@
#include <sys/cdefs.h>
#if __has_include_next(<err.h>)
#include_next <err.h>
#else
#define LIBBSD_NEED_ERR_H_FUNCS
#endif
#else
#include <bsd/sys/cdefs.h>
#if __has_include(<err.h>)
#include <err.h>
#else
#define LIBBSD_NEED_ERR_H_FUNCS
#endif
#endif
@@ -52,6 +56,26 @@ void verrc(int status, int code, const char *format, va_list ap)
__printflike(3, 0) __dead2;
void errc(int status, int code, const char *format, ...)
__printflike(3, 4) __dead2;
#ifdef LIBBSD_NEED_ERR_H_FUNCS
void vwarn(const char *format, va_list ap)
__printflike(1, 0);
void vwarnx(const char *format, va_list ap)
__printflike(1, 0);
void warn(const char *format, ...)
__printflike(1, 2);
void warnx(const char *format, ...)
__printflike(1, 2);
void verr(int status, const char *format, va_list ap)
__printflike(2, 0) __dead2;
void verrx(int status, const char *format, va_list ap)
__printflike(2, 0) __dead2;
void err(int status, const char *format, ...)
__printflike(2, 3) __dead2;
void errx(int status, const char *format, ...)
__printflike(2, 3) __dead2;
#endif
__END_DECLS
#endif