misc.c

unix下tftp服务器源码

/* $Id: misc.c,v 1.3 2001/11/16 20:15:27 hpa Exp $ */
/* ----------------------------------------------------------------------- *
 *   
 *   Copyright 2001 H. Peter Anvin - All Rights Reserved
 *
 *   This program is free software available under the same license
 *   as the "OpenBSD" operating system, distributed at
 *   http://www.openbsd.org/.
 *
 * ----------------------------------------------------------------------- */

/*
 * misc.c
 *
 * Minor help routines.
 */

#include "config.h"		/* Must be included first! */
#include <syslog.h>
#include "tftpd.h"

/*
 * Set the signal handler and flags.  Basically a user-friendly
 * wrapper around sigaction().
 */
void set_signal(int signum, void (*handler)(int), int flags)
{
  struct sigaction sa;

  memset(&sa, 0, sizeof sa);
  sa.sa_handler = handler;
  sigemptyset(&sa.sa_mask);
  sa.sa_flags = flags;
  
  if ( sigaction(signum, &sa, NULL) ) {
    syslog(LOG_ERR, "sigaction: %m");
    exit(EX_OSERR);
  }
}

/*
 * malloc() that syslogs an error message and bails if it fails.
 */
void *tfmalloc(size_t size)
{
  void *p = malloc(size);

  if ( !p ) {
    syslog(LOG_ERR, "malloc: %m");
    exit(EX_OSERR);
  }

  return p;
}

/*
 * strdup() that does the equivalent
 */
char *tfstrdup(const char *str)
{
  char *p = strdup(str);

  if ( !p ) {
    syslog(LOG_ERR, "strdup: %m");
    exit(EX_OSERR);
  }

  return p;
}