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/*
 * Calcurse - text-based organizer
 *
 * Copyright (c) 2004-2022 calcurse Development Team <misc@calcurse.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer.
 *
 *      - 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.
 *
 * 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.
 *
 * Send your feedback or comments to : misc@calcurse.org
 * Calcurse home page : http://calcurse.org
 *
 */

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/wait.h>

/*
 * Fork and execute an external process.
 *
 * If pfdin and/or pfdout point to a valid address, a pipe is created and the
 * appropriate file descriptors are written to pfdin/pfdout.
 */
static int
fork_exec(int *pfdin, int *pfdout, const char *path, char *const *arg)
{
	int pin[2], pout[2];
	int pid;

	if (pfdin && (pipe(pin) == -1))
		return 0;
	if (pfdout && (pipe(pout) == -1))
		return 0;

	if ((pid = fork()) == 0) {
		if (pfdout) {
			if (dup2(pout[0], STDIN_FILENO) < 0)
				_exit(127);
			close(pout[0]);
			close(pout[1]);
		}

		if (pfdin) {
			if (dup2(pin[1], STDOUT_FILENO) < 0)
				_exit(127);
			close(pin[0]);
			close(pin[1]);
		}

		execvp(path, arg);
		_exit(127);
	} else {
		if (pfdin)
			close(pin[1]);
		if (pfdout)
			close(pout[0]);

		if (pid > 0) {
			if (pfdin) {
				fcntl(pin[0], F_SETFD, FD_CLOEXEC);
				*pfdin = pin[0];
			}
			if (pfdout) {
				fcntl(pout[1], F_SETFD, FD_CLOEXEC);
				*pfdout = pout[1];
			}
		} else {
			if (pfdin)
				close(pin[0]);
			if (pfdout)
				close(pout[1]);
			return 0;
		}
	}
	return pid;
}

/* Wait for a child process to terminate. */
static int child_wait(int *pfdin, int *pfdout, int pid)
{
	int stat;

	if (pfdin)
		close(*pfdin);
	if (pfdout)
		close(*pfdout);

	waitpid(pid, &stat, 0);
	return stat;
}

/* Print error message and bail out. */
static void die(const char *format, ...)
{
	va_list arg;

	va_start(arg, format);
	fprintf(stderr, "error: ");
	vfprintf(stderr, format, arg);
	va_end(arg);

	exit(1);
}

/* Print usage message. */
static void usage(void)
{
	printf("usage: run-test [-h|--help] <test>...\n");
}

/* Run test with a specific name. */
static int run_test(const char *name, int expect_failure)
{
	char filename[BUFSIZ];
	char *arg1[3], *arg2[3];
	int pid1 = -1, pin1, pid2 = -1, pin2;
	FILE *fpin1 = NULL, *fpin2 = NULL;
	char buf1[BUFSIZ], buf2[BUFSIZ];
	int ret = 1;

	if (snprintf(filename, BUFSIZ, "./%s", name) >= BUFSIZ)
		die("file name too long\n");

	if (access(filename, F_OK) != 0) {
		if (snprintf(filename, BUFSIZ, "./%s.sh", name) >= BUFSIZ)
			die("file name too long\n");

		if (access(filename, F_OK) != 0)
			die("test not found: %s\n", name);
	}

	if (access(filename, X_OK) != 0)
		die("script is not executable: %s\n", filename);

	arg1[0] = arg2[0] = filename;
	arg1[1] = "expected";
	arg2[1] = "actual";
	arg1[2] = arg2[2] = NULL;

	printf("Running %s...", name);

	if ((pid1 = fork_exec(&pin1, NULL, *arg1, arg1)) < 0)
		die("failed to execute %s: %s\n", filename,
		    strerror(errno));

	if ((pid2 = fork_exec(&pin2, NULL, *arg2, arg2)) < 0)
		die("failed to execute %s: %s\n", filename,
		    strerror(errno));

	fpin1 = fdopen(pin1, "r");
	fpin2 = fdopen(pin2, "r");

	while (fgets(buf1, BUFSIZ, fpin1)) {
		if (!fgets(buf2, BUFSIZ, fpin2) || strcmp(buf1, buf2) != 0) {
			ret = 0;
			break;
		}
	}

	if (fgets(buf2, BUFSIZ, fpin2))
		ret = 0;

	if (fpin1)
		fclose(fpin1);
	if (fpin2)
		fclose(fpin2);

	if (child_wait(&pin1, NULL, pid1) != 0)
		ret = 0;
	if (child_wait(&pin2, NULL, pid2) != 0)
		ret = 0;

	if (expect_failure)
		ret = 1 - ret;

	if (ret == 1)
		printf(" ok\n");
	else
		printf(" FAIL\n");

	return ret;
}

int main(int argc, char **argv)
{
	int i;

	if (!argv[1])
		die("no tests specified, bailing out\n");
	else if (strcmp(argv[1], "-h") == 0
		 || strcmp(argv[1], "--help") == 0) {
		usage();
		return 0;
	}

	for (i = 1; i < argc; i++) {
		if (*argv[i] == '!') {
			if (!run_test(argv[i] + 1, 1))
				return 1;
		} else {
			if (!run_test(argv[i], 0))
				return 1;
		}
	}

	return 0;
}