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Diffstat (limited to 'apps/examples/pipe/pipe_main.c')
| -rw-r--r-- | apps/examples/pipe/pipe_main.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/apps/examples/pipe/pipe_main.c b/apps/examples/pipe/pipe_main.c new file mode 100644 index 000000000..97e728eb7 --- /dev/null +++ b/apps/examples/pipe/pipe_main.c @@ -0,0 +1,197 @@ +/**************************************************************************** + * examples/pipe/pipe_main.c + * + * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/stat.h> +#include <stdio.h> +#include <unistd.h> +#include <sched.h> +#include <fcntl.h> +#include <errno.h> + +#include "pipe.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: user_initialize + ****************************************************************************/ + +void user_initialize(void) +{ +} + +/**************************************************************************** + * Name: user_start + ****************************************************************************/ + +int user_start(int argc, char *argv[]) +{ + int filedes[2]; + int ret; + + /* Test FIFO logic */ + + printf("\nuser_start: Performing FIFO test\n"); + ret = mkfifo(FIFO_PATH1, 0666); + if (ret < 0) + { + fprintf(stderr, "user_start: mkfifo failed with errno=%d\n", errno); + return 1; + } + + /* Open one end of the FIFO for reading and the other end for writing. NOTE: + * the following might not work on most FIFO implementations because the attempt + * to open just one end of the FIFO for writing might block. The NuttX FIFOs block + * only on open for read-only (see interlock_test()). + */ + + filedes[1] = open(FIFO_PATH1, O_WRONLY); + if (filedes[1] < 0) + { + fprintf(stderr, "user_start: Failed to open FIFO %s for writing, errno=%d\n", + FIFO_PATH1, errno); + return 2; + } + + filedes[0] = open(FIFO_PATH1, O_RDONLY); + if (filedes[0] < 0) + { + fprintf(stderr, "user_start: Failed to open FIFO %s for reading, errno=%d\n", + FIFO_PATH1, errno); + if (close(filedes[1]) != 0) + { + fprintf(stderr, "user_start: close failed: %d\n", errno); + } + return 3; + } + + /* Then perform the test using those file descriptors */ + + ret = transfer_test(filedes[0], filedes[1]); + if (close(filedes[0]) != 0) + { + fprintf(stderr, "user_start: close failed: %d\n", errno); + } + if (close(filedes[1]) != 0) + { + fprintf(stderr, "user_start: close failed: %d\n", errno); + } + /* unlink(FIFO_PATH1); fails */ + + if (ret != 0) + { + fprintf(stderr, "user_start: FIFO test FAILED (%d)\n", ret); + return 4; + } + printf("user_start: FIFO test PASSED\n"); + + /* Test PIPE logic */ + + printf("\nuser_start: Performing pipe test\n"); + ret = pipe(filedes); + if (ret < 0) + { + fprintf(stderr, "user_start: pipe failed with errno=%d\n", errno); + return 5; + } + + /* Then perform the test using those file descriptors */ + + ret = transfer_test(filedes[0], filedes[1]); + if (close(filedes[0]) != 0) + { + fprintf(stderr, "user_start: close failed: %d\n", errno); + } + if (close(filedes[1]) != 0) + { + fprintf(stderr, "user_start: close failed: %d\n", errno); + } + + if (ret != 0) + { + fprintf(stderr, "user_start: PIPE test FAILED (%d)\n", ret); + return 6; + } + printf("user_start: PIPE test PASSED\n"); + + /* Perform the FIFO interlock test */ + + printf("\nuser_start: Performing pipe interlock test\n"); + ret = interlock_test(); + if (ret != 0) + { + fprintf(stderr, "user_start: FIFO interlock test FAILED (%d)\n", ret); + return 7; + } + printf("user_start: PIPE interlock test PASSED\n"); + + /* Perform the pipe redirection test */ + + printf("\nuser_start: Performing redirection test\n"); + ret = redirection_test(); + if (ret != 0) + { + fprintf(stderr, "user_start: FIFO redirection test FAILED (%d)\n", ret); + return 7; + } + printf("user_start: PIPE redirection test PASSED\n"); + + fflush(stdout); + return 0; +} |