代码如下:
/* tcpportping.c */
#include <Python.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/time.h>
/* count time functions */
static double mytime(void)
{
struct timeval tv
if (gettimeofday(&tv, NULL) == -1)
return 0.0
return (double)tv.tv_usec + (double)tv.tv_sec * 1000000
}
static PyObject * /* returns object */
tcpping(PyObject *self, PyObject *args )
{
struct sockaddr_in addr
struct hostent *hp
double time
char*host = NULL
int fd
int port, timeout
if (!PyArg_ParseTuple(args, "sii", &host, &port, &timeout)) /* convert Python ->C */
return NULL /* null=raise exception */
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) <0) {
return Py_BuildValue("d", -1.0) /* convert C ->Python */
}
bzero((char *)&addr, sizeof(addr))
if ((hp = gethostbyname(host)) == NULL) {
return Py_BuildValue("d", -2.0) /* convert C ->Python */
}
bcopy(hp->h_addr, &addr.sin_addr, hp->h_length)
addr.sin_family = AF_INET
addr.sin_port = htons(port)
struct timeval tv
tv.tv_sec = 0
tv.tv_usec = timeout * 1000
double stime = mytime()
if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) <0) {
return Py_BuildValue("d", -3.0) /* convert C ->Python */
}
fd_set read, write
FD_ZERO(&read)
FD_ZERO(&write)
FD_SET(fd, &read)
FD_SET(fd, &write)
if (select(fd + 1, &read, &write, NULL, &tv) == 0) {
close(fd)
return Py_BuildValue("d", -4.0) /* convert C ->Python */
}
double etime = mytime()
time = etime - stime
if (!FD_ISSET(fd, &read) &&!FD_ISSET(fd, &write)) {
close(fd)
return Py_BuildValue("d", -4.0) /* convert C ->Python */
}
close(fd)
return Py_BuildValue("d", time/1000) /* convert C ->Python */
}
/* registration table */
static struct PyMethodDef portping_methods[] = {
{"tcpping", tcpping, METH_VARARGS}, /* method name, C func ptr, always-tuple */
{NULL, NULL} /* end of table marker */
}
/* module initializer */
void inittcpportping( ) /* called on first import */
{ /* name matters if loaded dynamically */
(void) Py_InitModule("tcpportping", portping_methods) /* mod name, table ptr */
}
C语言如何调用python,相关步骤如下:
首先,C语言中调用python,要使用头文件Python.h。
2、接着,定义一个调用python的函数。
相关推荐:《Python教程》
3、函数中,设置python库的路径。
4、然后,初始化python。
5、运行一个python代码,输出How are you。
6、最后,释放python。