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Fred WrightandChristopher Nielsen
a35f2d8837
Also adds vdprintf() to darwin_c tests. TESTED: Fails without the new vdprintf() addition; passes with it.
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*
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* Copyright (c) 2024 Frederick H. G. Wright II <fw@fwright.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This provides functional tests for dprintf and vdprintf, including
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* *not* closing the provided fd.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#define BUF_SIZE 256
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#define TEST_ARGS "%s output is %d\n", name, 42
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typedef int test_func_t(int fd, const char * __restrict format, ...);
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static void
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test_xdprintf(const char *name, test_func_t func, int pipes[], int verbose)
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{
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int ret, explen, done = 0;
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ssize_t actlen;
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char expbuf[BUF_SIZE], actbuf[BUF_SIZE];
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if (verbose) {
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printf("Testing %s...\n", name);
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fflush(stdout);
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}
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/* Create expected result */
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explen = snprintf(expbuf, sizeof(expbuf), TEST_ARGS);
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assert(explen > 0 && "snprintf failed creating expected");
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/* Test func writing to wrong (read) end of pipe */
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ret = func(pipes[0], TEST_ARGS);
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assert(ret < 0 && "Bad return value with invalid fd");
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assert(errno == EBADF && "Bad errno with invalid fd");
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/* Do test twice to detect unexpected close() */
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do {
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/* Test func writing to correct (write) end of pipe */
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errno = 0;
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ret = func(pipes[1], TEST_ARGS);
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assert(ret == explen && "Bad return value with valid fd");
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assert(errno == 0 && "Bad errno with valid fd");
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/* Read and check the pipe data */
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actlen = read(pipes[0], actbuf, sizeof(actbuf));
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assert(actlen == explen && "Incorrect length read from pipe");
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assert(!strncmp(actbuf, expbuf, explen) && "Piped result doesn't match");
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} while (!done++);
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}
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int
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test_vdprintf(int fd, const char * __restrict format, ...)
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{
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va_list args;
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va_start(args, format);
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int ret = vdprintf(fd, format, args);
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va_end(args);
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return ret;
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}
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int
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main(int argc, const char *argv[]) {
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int verbose = 0, pipes[2];
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if (argc >= 2 && !strcmp(argv[1], "-v")) verbose = 1;
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if (pipe(pipes)) {
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perror("Unable to create pipe");
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return 1;
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}
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test_xdprintf("dprintf", dprintf, pipes, verbose);
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test_xdprintf("vdprintf", test_vdprintf, pipes, verbose);
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if (close(pipes[1])) {
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perror("Unable to close write pipe");
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return 1;
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}
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if (close(pipes[0])) {
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perror("Unable to close read pipe");
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return 1;
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}
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printf("dprintf/vdprintf test succeeded\n");
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return 0;
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}
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