mirror of
https://github.com/opnsense/src.git
synced 2026-07-15 12:11:48 -04:00
f5d3d35273
This only simplifies the code, no functional changes expected MFC After: 1 week (cherry picked from commit c8d40bf8ecc60cc15e3904410db62065ea681fdc)
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*-
|
|
* Copyright (c) 2017 Baptiste Daroussin <bapt@FreeBSD.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:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer
|
|
* in this position and unchanged.
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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/procdesc.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <signal.h>
|
|
#include <spawn.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "pr.h"
|
|
#include "diff.h"
|
|
#include "xmalloc.h"
|
|
|
|
#define _PATH_PR "/usr/bin/pr"
|
|
|
|
extern char **environ;
|
|
|
|
struct pr *
|
|
start_pr(char *file1, char *file2)
|
|
{
|
|
int pfd[2];
|
|
pid_t pid;
|
|
char *header;
|
|
struct pr *pr;
|
|
posix_spawn_file_actions_t fa;
|
|
posix_spawnattr_t sa;
|
|
int error;
|
|
|
|
pr = xcalloc(1, sizeof(*pr));
|
|
|
|
xasprintf(&header, "%s %s %s", diffargs, file1, file2);
|
|
signal(SIGPIPE, SIG_IGN);
|
|
fflush(stdout);
|
|
if (pipe2(pfd, O_CLOEXEC) == -1)
|
|
err(2, "pipe");
|
|
|
|
if ((error = posix_spawnattr_init(&sa)) != 0)
|
|
errc(2, error, "posix_spawnattr_init");
|
|
if ((error = posix_spawn_file_actions_init(&fa)) != 0)
|
|
errc(2, error, "posix_spawn_file_actions_init");
|
|
|
|
posix_spawnattr_setprocdescp_np(&sa, &pr->procd, 0);
|
|
|
|
if (pfd[0] != STDIN_FILENO)
|
|
posix_spawn_file_actions_adddup2(&fa, pfd[0], STDIN_FILENO);
|
|
|
|
char *argv[] = { __DECONST(char *, _PATH_PR),
|
|
__DECONST(char *, "-h"), header, NULL };
|
|
error = posix_spawn(&pid, _PATH_PR, &fa, &sa, argv, environ);
|
|
if (error != 0)
|
|
errc(2, error, "could not spawn pr");
|
|
|
|
posix_spawn_file_actions_destroy(&fa);
|
|
posix_spawnattr_destroy(&sa);
|
|
|
|
/* parent */
|
|
if (pfd[1] == STDOUT_FILENO) {
|
|
pr->ostdout = STDOUT_FILENO;
|
|
} else {
|
|
if ((pr->ostdout = dup(STDOUT_FILENO)) < 0 ||
|
|
dup2(pfd[1], STDOUT_FILENO) < 0) {
|
|
err(2, "stdout");
|
|
}
|
|
close(pfd[1]);
|
|
}
|
|
close(pfd[0]);
|
|
free(header);
|
|
return (pr);
|
|
}
|
|
|
|
/* close the pipe to pr and restore stdout */
|
|
void
|
|
stop_pr(struct pr *pr)
|
|
{
|
|
int wstatus;
|
|
|
|
if (pr == NULL)
|
|
return;
|
|
|
|
fflush(stdout);
|
|
if (pr->ostdout != STDOUT_FILENO) {
|
|
dup2(pr->ostdout, STDOUT_FILENO);
|
|
close(pr->ostdout);
|
|
}
|
|
while (pdwait(pr->procd, &wstatus, WEXITED, NULL, NULL) == -1) {
|
|
if (errno != EINTR)
|
|
err(2, "pdwait");
|
|
}
|
|
close(pr->procd);
|
|
free(pr);
|
|
if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != 0)
|
|
errx(2, "pr exited abnormally");
|
|
else if (WIFSIGNALED(wstatus))
|
|
errx(2, "pr killed by signal %d",
|
|
WTERMSIG(wstatus));
|
|
}
|