#ifndef _GLOBAL_H
#define _GLOBAL_H 1

#include <signal.h>

/* install signal handler macro */
#define INSTALL_SIGNAL(signum, act, oldact) \
  sigaction(signum, NULL, &oldact); \
  if (oldact.sa_handler != SIG_IGN) \
    sigaction(signum, &act, NULL);

/*
 * global.c stuff
 */
#include <stdarg.h>

/* function declarations */
void vprintferr(const char *fmt, va_list ap);
void printferr(const char *fmt, ...);
void bailout(const char *fmt, ...);

/* global variable definitions */
/* libc manual: Handlers that return normally must modify some global variable
 * in order to have any effect. Typically, the variable is one that is examined
 * periodically by the program during normal operation. Its data type should be
 * sig_atomic_t for reasons described in Atomic Data Access.
 */
extern volatile sig_atomic_t error;  /* error flag */
extern char *me;                     /* name of myself (argv[0]) */
extern char* charmap[128];

#endif