mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 18:56:38 +00:00
8b6f73e37b
Changes of interest
o unit-tests: use private TMPDIR to avoid errors from other users
o avoid strdup in mkTempFile
o always use vfork
o job.c: do not create empty shell files in jobs mode
reduce unnecessary calls to waitpid
o cond.c: fix debug output for comparison operators in conditionals
152 lines
3.2 KiB
C
152 lines
3.2 KiB
C
/* $NetBSD: filemon_dev.c,v 1.8 2021/02/01 21:09:25 rillig Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2020 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Taylor R. Campbell.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
#include "filemon.h"
|
|
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef HAVE_FILEMON_H
|
|
# include <filemon.h>
|
|
#endif
|
|
|
|
#ifndef _PATH_FILEMON
|
|
#define _PATH_FILEMON "/dev/filemon"
|
|
#endif
|
|
|
|
struct filemon {
|
|
int fd;
|
|
};
|
|
|
|
const char *
|
|
filemon_path(void)
|
|
{
|
|
|
|
return _PATH_FILEMON;
|
|
}
|
|
|
|
struct filemon *
|
|
filemon_open(void)
|
|
{
|
|
struct filemon *F;
|
|
unsigned i;
|
|
int error;
|
|
|
|
/* Allocate and zero a struct filemon object. */
|
|
F = calloc(1, sizeof *F);
|
|
if (F == NULL)
|
|
return NULL;
|
|
|
|
/* Try opening /dev/filemon, up to six times (cargo cult!). */
|
|
for (i = 0; (F->fd = open(_PATH_FILEMON, O_RDWR|O_CLOEXEC)) == -1; i++) {
|
|
if (i == 5) {
|
|
error = errno;
|
|
goto fail0;
|
|
}
|
|
}
|
|
|
|
/* Success! */
|
|
return F;
|
|
|
|
fail0: free(F);
|
|
errno = error;
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
filemon_setfd(struct filemon *F, int fd)
|
|
{
|
|
|
|
/* Point the kernel at this file descriptor. */
|
|
if (ioctl(F->fd, FILEMON_SET_FD, &fd) == -1)
|
|
return -1;
|
|
|
|
/* No need for it in userland any more; close it. */
|
|
(void)close(fd);
|
|
|
|
/* Success! */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
filemon_setpid_parent(struct filemon *F, pid_t pid)
|
|
{
|
|
/* Nothing to do! */
|
|
}
|
|
|
|
int
|
|
filemon_setpid_child(const struct filemon *F, pid_t pid)
|
|
{
|
|
|
|
/* Just pass it on to the kernel. */
|
|
return ioctl(F->fd, FILEMON_SET_PID, &pid);
|
|
}
|
|
|
|
int
|
|
filemon_close(struct filemon *F)
|
|
{
|
|
int error = 0;
|
|
|
|
/* Close the filemon device fd. */
|
|
if (close(F->fd) == -1 && error == 0)
|
|
error = errno;
|
|
|
|
/* Free the filemon descriptor. */
|
|
free(F);
|
|
|
|
/* Set errno and return -1 if anything went wrong. */
|
|
if (error != 0) {
|
|
errno = error;
|
|
return -1;
|
|
}
|
|
|
|
/* Success! */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
filemon_readfd(const struct filemon *F)
|
|
{
|
|
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
filemon_process(struct filemon *F)
|
|
{
|
|
|
|
return 0;
|
|
}
|