/***************************************************************************
* sys_wrap.c -- Error-checked wrappers around common functions. *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is *
* also a registered trademark of Insecure.Com LLC. This program is free *
* software; you may redistribute and/or modify it under the terms of the *
* GNU General Public License as published by the Free Software *
* Foundation; Version 2 with the clarifications and exceptions described *
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* Note that the GPL places important restrictions on "derived works", yet *
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***************************************************************************/
/* $Id$ */
#include <limits.h>
#include "sys_wrap.h"
#include "util.h"
void *Calloc(size_t nmemb, size_t size)
{
void *ret;
/* older libcs don't check for int overflow */
smul(nmemb, size);
ret = calloc(nmemb, size);
if (ret == NULL)
die("calloc");
return ret;
}
int Close(int fd)
{
if (close(fd) < 0)
die("close");
return 0;
}
int Connect(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen)
{
if (connect(sockfd, serv_addr, addrlen) < 0)
die("connect");
return 0;
}
int Dup2(int oldfd, int newfd)
{
int ret;
ret = dup2(oldfd, newfd);
if (ret < 0)
die("dup2");
return ret;
}
int Listen(int s, int backlog)
{
if (listen(s, backlog) < 0)
die("listen");
return 0;
}
int Open(const char *pathname, int flags, mode_t mode)
{
int ret;
ret = open(pathname, flags, mode);
if (ret < 0)
die("open");
return ret;
}
ssize_t Read(int fd, void *buf, size_t count)
{
ssize_t ret;
ret = read(fd, buf, count);
if (ret < 0)
die("read");
return ret;
}
ssize_t Recv(int s, void *buf, size_t len, int flags)
{
ssize_t ret;
ret = recv(s, (char*)buf, len, flags);
if (ret < 0)
die("recv");
return ret;
}
ssize_t Recvfrom(int s, void *buf, size_t len, int flags,
struct sockaddr *from, socklen_t *fromlen)
{
ssize_t ret;
ret = recvfrom(s, (char*)buf, len, flags, from, fromlen);
if (ret < 0)
die("recvfrom");
return ret;
}
int Setsockopt(int s, int level, int optname, const void *optval,
socklen_t optlen)
{
int ret;
ret = setsockopt(s, level, optname, (const char*)optval, optlen);
if (ret < 0)
die("setsockopt");
return ret;
}
sighandler_t Signal(int signum, sighandler_t handler)
{
sighandler_t ret;
ret = signal(signum, handler);
if (ret == SIG_ERR)
die("signal");
return ret;
}
int Socket(int domain, int type, int protocol)
{
int ret;
ret = socket(domain, type, protocol);
if (ret < 0)
die("socket");
return ret;
}
char *Strdup(const char *s)
{
char *ret;
ret = strdup(s);
if (ret == NULL)
die("strdup");
return ret;
}
ssize_t Write(int fd, const void *buf, size_t count)
{
ssize_t ret = write(fd, buf, count);
if (ret < 0) /* we don't bail if < count bytes written */
die("write");
return ret;
}