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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2025 Keith Packard
*
* 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 of the copyright holder 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 HOLDER 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.
*/
#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#ifndef TEST_FILE_NAME
#define TEST_FILE_NAME "DPRINTF.TXT"
#endif
#define check(condition, message) \
do { \
if (!(condition)) { \
printf("%s: %s\n", message, #condition); \
(void)remove(TEST_FILE_NAME); \
exit(1); \
} \
} while (0)
#define STRING_PART \
" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLM" \
"NOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
static const char *strings[] = {
"test dprintf\n",
STRING_PART STRING_PART STRING_PART STRING_PART,
};
#define NSTRING (sizeof(strings) / sizeof(strings[0]))
int
main(void)
{
size_t s;
for (s = 0; s < NSTRING; s++) {
/* Create test file */
int fd = open(TEST_FILE_NAME, O_CREAT | O_WRONLY | O_TRUNC, 0666);
check(fd >= 0, "create file failed");
/* Write test data using dprintf */
int ret = dprintf(fd, "%s", strings[s]);
/* Verify that dprint returns expected value */
check(ret >= 0 && (size_t)ret == strlen(strings[s]), "dprint failed");
/* Close the test file, re-open using fopen */
close(fd);
FILE *f = fopen(TEST_FILE_NAME, "r");
static char buf[512];
check(f != NULL, "re-open file");
/* Read test data using fread */
ret = fread(buf, sizeof(char), sizeof(buf) / sizeof(buf[0]), f);
check(ret >= 0 && (size_t)ret == strlen(strings[s]), "fread failed");
buf[ret] = '\0';
/* Verify file contains expected data */
check(strcmp(buf, strings[s]) == 0, "fread contents incorrect");
/* Clean up */
fclose(f);
remove(TEST_FILE_NAME);
}
printf("test-dprintf success\n");
return 0;
}
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