替换system函数，减少资源开销，用 posix_spawn函数

替换system函数减少资源开销用 posix_spawn函数system(ifconfig wlan0 up 192.168.6.1); // 等价于 int set_wlan0_ap_ip(const char *iface, const char *ip) { pid_t pid; char *argv[] { ifconfig, iface, up, ip, NULL }; int ret posix_spawn(pid, /sbin/ifconfig, NULL, NULL, argv, NULL); if (ret ! 0) { printf(posix_spawn failed: %d\n, ret); return -1; } // 等待 ifconfig 执行完成 int status; waitpid(pid, status, 0); if (WIFEXITED(status) WEXITSTATUS(status) 0) { printf(IP set successfully\n); return 0; } else { printf(ifconfig failed\n); return -1; } } // 调用示例 set_wlan0_ap_ip(wlan0, 192.168.6.1);