kc3-lang/libbsd/test/test-stream.c

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• Hash : 1808d64b
  Author :
  Date : 2021-03-01T05:14:10
  

  test: Fix pipe_feed() to allow checking fprintf format strings
  
  Warned-by: gcc -W
  

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• test/test-stream.c

• /*
   * Copyright © 2013 Guillem Jover <guillem@hadrons.org>
   *
   * 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. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
   */
  
  #include <sys/wait.h>
  #include <assert.h>
  #include <unistd.h>
  #include <wchar.h>
  #include <stdio.h>
  
  #include "test-stream.h"
  
  FILE *
  pipe_feed(enum pipe_data_mode mode, const void **buf, int buf_nmemb)
  {
  	FILE *fp;
  	int rc;
  	int pipefd[2];
  	pid_t pid;
  
  	rc = pipe(pipefd);
  	assert(rc >= 0);
  
  	pid = fork();
  	assert(pid >= 0);
  
  	if (pid == 0) {
  		int line;
  
  		/* Child writes data to pipe. */
  		rc = close(pipefd[0]);
  		assert(rc >= 0);
  
  		fp = fdopen(pipefd[1], "w");
  		assert(fp);
  
  		for (line = 0; line < buf_nmemb; line++) {
  			if (mode == PIPE_DATA_ASCII)
  				rc = fprintf(fp, "%s", (const char *)buf[line]);
  			else
  				rc = fprintf(fp, "%ls", (const wchar_t *)buf[line]);
  			assert(rc >= 0);
  		}
  
  		rc = fclose(fp);
  		assert(rc >= 0);
  
  		_exit(0);
  	} else {
  		/* Parent gets a FILE and reads from it. */
  		rc = close(pipefd[1]);
  		assert(rc >= 0);
  
  		fp = fdopen(pipefd[0], "r");
  		assert(fp);
  
  		return fp;
  	}
  }
  
  void
  pipe_close(FILE *fp)
  {
  	fclose(fp);
  	wait(NULL);
  }
  

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