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/*
VTun - Virtual Tunnel over TCP/IP network.
Copyright (C) 1998-2008 Maxim Krasnyansky <max_mk@yahoo.com>
VTun has been derived from VPPP package by Maxim Krasnyansky.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*
* $Id: lib.h,v 1.7.2.2 2008/01/07 22:35:41 mtbishop Exp $
*/
#ifndef _VTUN_LIB_H
#define _VTUN_LIB_H
#include "config.h"
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#ifndef HAVE_SETPROC_TITLE
void init_title(int argc,char *argv[],char *env[], char *name);
void set_title(const char *ftm, ...);
#else
#define init_title( a... )
#define set_title setproctitle
#endif /* HAVE_SETPROC_TITLE */
#ifndef min
#define min(a,b) ( (a)<(b) ? (a):(b) )
#endif
int readn_t(int fd, void *buf, size_t count, time_t timeout);
int print_p(int f, const char *ftm, ...);
int run_cmd(void *d, void *opt);
void free_sopt(struct vtun_sopt *opt);
/* IO cancelation */
extern volatile sig_atomic_t __io_canceled;
static inline void io_init(void)
{
__io_canceled = 0;
}
static inline void io_cancel(void)
{
__io_canceled = 1;
}
/* signal safe syslog function */
void vtun_syslog (int priority, char *format, ...);
/* Read exactly len bytes (Signal safe)*/
static inline int read_n(int fd, char *buf, int len)
{
register int t=0, w;
while (!__io_canceled && len > 0) {
if( (w = read(fd, buf, len)) < 0 ){
if( errno == EINTR || errno == EAGAIN )
continue;
return -1;
}
if( !w )
return 0;
len -= w; buf += w; t += w;
}
return t;
}
/* Write exactly len bytes (Signal safe)*/
static inline int write_n(int fd, char *buf, int len)
{
register int t=0, w;
while (!__io_canceled && len > 0) {
if( (w = write(fd, buf, len)) < 0 ){
if( errno == EINTR || errno == EAGAIN )
continue;
return -1;
}
if( !w )
return 0;
len -= w; buf += w; t += w;
}
return t;
}
#endif /* _VTUN_LIB_H */
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