/**************************************************************************** * libs/libc/stdio/lib_puts.c * * SPDX-License-Identifier: Apache-2.0 * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you 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. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include "libc.h" /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: puts * * Description: * puts() writes the string s and a trailing newline to stdout. * ****************************************************************************/ int puts(FAR const IPTR char *s) { #ifdef CONFIG_FILE_STREAM FILE *stream = stdout; int nwritten; int nput = EOF; int ret; /* Write the string (the next two steps must be atomic) */ flockfile(stream); /* Write the string without its trailing '\0' */ nwritten = fputs_unlocked(s, stream); if (nwritten > 0) { /* Followed by a newline */ char newline = '\n'; ret = lib_fwrite_unlocked(&newline, 1, stream); if (ret > 0) { nput = nwritten + 1; /* Flush the buffer after the newline is output if line buffering * is enabled. */ if ((stream->fs_flags & __FS_FLAG_LBF) != 0) { ret = lib_fflush_unlocked(stream); if (ret < 0) { nput = EOF; } } } } funlockfile(stdout); return nput; #else size_t len = strlen(s); struct iovec iov[2]; iov[0].iov_base = (FAR void *)s; iov[0].iov_len = len; iov[1].iov_base = "\n"; iov[1].iov_len = 1; return writev(STDOUT_FILENO, iov, 2) == ++len ? len : EOF; #endif }