/*
* Copyright (c) 2020 Red Hat Inc.
*
* 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.
* * The names of contributors to this software may not 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.
*
* Author: Daiki Ueno
*/
#include "config.h"
#include "compat.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
int
main (int argc,
char *argv[])
{
if (argc == 1) {
pid_t pid;
int pfds[2];
if (pipe (pfds) < 0) {
perror ("pipe");
exit (EXIT_FAILURE);
}
pid = fork ();
if (pid < 0) {
perror ("fork");
exit (EXIT_FAILURE);
}
if (pid == 0) {
char * const args[] = {
BUILDDIR "/common/frob-getprogname" EXEEXT " foo bar",
"foo",
"bar",
NULL,
};
dup2 (pfds[1], STDOUT_FILENO);
close (pfds[0]);
close (pfds[1]);
execv (BUILDDIR "/common/frob-getprogname" EXEEXT, args);
} else {
int status;
char buffer[1024];
size_t offset = 0;
ssize_t nread;
char *p;
close (pfds[1]);
while (1) {
nread = read (pfds[0], buffer + offset, sizeof(buffer) - offset);
if (nread < 0) {
perror ("read");
exit (EXIT_FAILURE);
}
if (nread == 0)
break;
offset += nread;
}
if (waitpid (pid, &status, 0) < 0) {
perror ("waitpid");
exit (EXIT_FAILURE);
}
assert (!WIFSIGNALED (status));
assert (WIFEXITED (status));
assert (WEXITSTATUS (status) == 0);
p = memchr (buffer, '\n', sizeof(buffer));
if (!p) {
fprintf (stderr, "missing newline: %s\n", buffer);
exit (EXIT_FAILURE);
}
*p = '\0';
return strcmp ("frob-getprogname", buffer) == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
} else {
printf ("%s\n", getprogname ());
exit (EXIT_SUCCESS);
}
return EXIT_SUCCESS;
}