62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* File: main.c
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* ------------
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* 校园网802.1X客户端命令行
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* 子函数声明 */
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int Authentication(const char *UserName, const char *Password, const char *DeviceName);
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/**
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* 函数：main()
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*
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* 检查程序的执行权限，检查命令行参数格式。
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* 允许的调用格式包括：
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* njit-client username password
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* njit-client username password eth0
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* njit-client username password eth1
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* 若没有从命令行指定网卡，则默认将使用eth0
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*/
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int main(int argc, char *argv[])
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{
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char *UserName;
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char *Password;
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char *DeviceName;
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/* 检查当前是否具有root权限 */
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if (getuid() != 0) {
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fprintf(stderr, "抱歉，运行本客户端程序需要root权限\n");
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fprintf(stderr, "(RedHat/Fedora下使用su命令切换为root)\n");
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fprintf(stderr, "(Ubuntu/Debian下在命令前添加sudo)\n");
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exit(-1);
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}
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/* 检查命令行参数格式 */
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if (argc<3 || argc>4) {
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fprintf(stderr, "命令行参数错误！\n");
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fprintf(stderr, "正确的调用格式例子如下：\n");
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fprintf(stderr, " %s username password\n", argv[0]);
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fprintf(stderr, " %s username password eth0\n", argv[0]);
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fprintf(stderr, " %s username password eth1\n", argv[0]);
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fprintf(stderr, "(注：若不指明网卡，默认情况下将使用eth0)\n");
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exit(-1);
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} else if (argc == 4) {
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DeviceName = argv[3]; // 允许从命令行指定设备名
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} else {
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DeviceName = "eth0"; // 缺省情况下使用的设备
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}
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UserName = argv[1];
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Password = argv[2];
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/* 调用子函数完成802.1X认证 */
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Authentication(UserName, Password, DeviceName);
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return (0);
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}
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