NAME

xt_va_usage() - Print usage message and terminate process

LIBRARY

#include <xtend/proc.h>
-lxtend

SYNOPSIS

void    xt_va_usage(const char *format_string, ...)

ARGUMENTS

format_string:  printf-style format string
Additional arguments to match placeholders in format_string

DESCRIPTION

xt_va_usage() is a simple convenience function that takes a printf-style variable argument list, prints a message to stderr, and terminates the proces with an exit status of EX_USAGE. The message should indicate correct command-line usage of the calling program as conventional for Unix commands.

RETURN VALUES

Does not return, terminates the calling process

SEE ALSO

printf(3), vfprintf(3), exit(3), sysexits(3)