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LIBXO(3)		 BSD Library Functions Manual		      LIBXO(3)

NAME
     xo_emit_err, xo_emit_errc,	xo_emit_errx xo_emit_warn, xo_emit_warnx,
     xo_emit_warn_c, xo_emit_warn_hc --	emit errors and	warnings in multiple
     output styles

LIBRARY
     library "libxo"

SYNOPSIS
     #include <libxo/xo.h>

     void
     xo_emit_warn(const	char *fmt, ...);

     void
     xo_emit_warnx(const char *fmt, ...);

     void
     xo_emit_warn_c(int	code, const char *fmt, ...);

     void
     xo_emit_warn_hc(xo_handle_t *xop, int code, const char *fmt, ...);

     void
     xo_emit_err(int eval, const char *fmt, ...);

     void
     xo_emit_errc(int eval, int	code, const char *fmt, ...);

     void
     xo_emit_errx(int eval, const char *fmt, ...);

DESCRIPTION
     Many programs make	use of the standard library functions err(3) and
     warn(3) to	generate errors	and warnings for the user.  libxo wants	to
     pass that information via the current output style, and provides compati-
     ble functions to allow this.

     The fmt argument is one compatible	with xo_emit(3)	which allows these
     functions make structured data.  To generate unstructured data, use the
     xo_err(3) functions.

     These functions display the program name, a colon,	a formatted message
     based on the arguments, and then optionally a colon and an	error message
     associated	with either errno or the code parameter.

	       EXAMPLE:
		   if (open(filename, O_RDONLY)	< 0)
		       xo_err(1, "cannot open file '%s'", filename);

SEE ALSO
     xo_emit(3), xo_format(5), xo_err(3), libxo(3)

HISTORY
     The libxo library first appeared in FreeBSD 11.0.

AUTHORS
     libxo was written by Phil Shafer <phil@freebsd.org>.

BSD			       December	4, 2014				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS

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