/** * Copyright © 2016 IBM Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "console-server.h" #include <err.h> #include <errno.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <sys/socket.h> #include <sys/un.h> #include <sys/types.h> #include <unistd.h> #define CONSOLE_SOCKET_PREFIX "obmc-console" /* Build the socket path. */ ssize_t console_socket_path(socket_path_t sun_path, const char *id) { ssize_t rc; if (!id) { errno = EINVAL; return -1; } rc = snprintf(sun_path + 1, sizeof(socket_path_t) - 1, CONSOLE_SOCKET_PREFIX ".%s", id); if (rc < 0) { return rc; } if ((size_t)rc > (sizeof(socket_path_t) - 1)) { errno = 0; return -1; } sun_path[0] = '\0'; return rc + 1 /* Capture NUL prefix */; } ssize_t console_socket_path_readable(const struct sockaddr_un *addr, size_t addrlen, socket_path_t path) { const char *src = (const char *)addr; size_t len; if (addrlen > SSIZE_MAX) { return -EINVAL; } len = addrlen - sizeof(addr->sun_family) - 1; memcpy(path, src + sizeof(addr->sun_family) + 1, len); path[len] = '\0'; return (ssize_t)len; /* strlen() style */ }