Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/fstat/fuser.c	Lines:	0	50	0.0 %
Date:	2016-12-06	Branches:	0	43	0.0 %


/*	$OpenBSD: fuser.c,v 1.6 2015/01/16 06:40:08 deraadt Exp $	*/

/*
 * Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Copyright (c) 2002 Peter Werner <peterw@ifost.org.au>
 * 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.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 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/queue.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/ucred.h>
#define _KERNEL /* for DTYPE_VNODE */
#include <sys/file.h>
#undef _KERNEL

#include <err.h>
#include <fcntl.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "fstat.h"

/*
 * Returns 1 if the file watched (fa) is equivalent
 * to a file held by a process (kf), else 0.
 */
static int
match(struct filearg *fa, struct kinfo_file *kf)
{
	if (fa->dev == kf->va_fsid) {
		if (cflg)
			return (1);
		if (fa->ino == kf->va_fileid)
			return (1);
	}
	return (0);
}

/*
 * Examine kinfo_file struct and record the details if they
 * match a watched file.
 */
void
fuser_check(struct kinfo_file *kf)
{
	struct filearg *fa;
	struct fuser *fu;

	if (kf->f_type != DTYPE_VNODE)
		return;

	SLIST_FOREACH(fa, &fileargs, next) {
		if (!match(fa, kf))
			continue;

		/*
		 * This assumes that kinfo_files2 returns all files
		 * associated with a process in a contiguous block.
		 */
		if (TAILQ_EMPTY(&fa->fusers) || kf->p_pid !=
		    (fu = TAILQ_LAST(&fa->fusers, fuserhead))->pid) {
			fu = malloc(sizeof(*fu));
			if (fu == NULL)
				err(1, NULL);
			fu->pid = kf->p_pid;
			fu->uid = kf->p_uid;
			fu->flags = 0;
			TAILQ_INSERT_TAIL(&fa->fusers, fu, tq);
		}
		switch (kf->fd_fd) {
		case KERN_FILE_CDIR:
			fu->flags |= F_CWD;
			break;
		case KERN_FILE_RDIR:
			fu->flags |= F_ROOT;
			break;
		case KERN_FILE_TEXT:
			fu->flags |= F_TEXT;
			break;
		case KERN_FILE_TRACE:
			/* ignore */
			break;
		default:
			fu->flags |= F_OPEN;
			break;
		}
	}
}

/*
 * Print out the specfics for a given file/filesystem
 */
static void
printfu(struct fuser *fu)
{
	struct passwd *pwd;

	printf("%d", fu->pid);
	fflush(stdout);

	if (fu->flags & F_CWD)
		fprintf(stderr, "c");

	if (fu->flags & F_ROOT)
		fprintf(stderr, "r");

	if (fu->flags & F_TEXT)
		fprintf(stderr, "t");

	if (uflg) {
		pwd = getpwuid(fu->uid);
		if (pwd != NULL)
			fprintf(stderr, "(%s)", pwd->pw_name);
		else
			fprintf(stderr, "(%d)", fu->uid);
	}

	putchar(' ');
}

/*
 * For each file, print matching process info and optionally send a signal.
 */
void
fuser_run(void)
{
	struct filearg *fa;
	struct fuser *fu;
	pid_t mypid = getpid();

	SLIST_FOREACH(fa, &fileargs, next) {
		fprintf(stderr, "%s: ", fa->name);
		TAILQ_FOREACH(fu, &fa->fusers, tq) {
			printfu(fu);
			if (sflg && fu->pid != mypid) {
				kill(fu->pid, signo);
			}
		}
		fflush(stdout);
		fprintf(stderr, "\n");
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: fuser.c,v 1.6 2015/01/16 06:40:08 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			/*
20			* Copyright (c) 2002 Peter Werner <peterw@ifost.org.au>
21			* All rights reserved.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			*
27			* 1. Redistributions of source code must retain the above copyright
28			* notice, this list of conditions and the following disclaimer.
29			* 2. The name of the author may not be used to endorse or promote products
30			* derived from this software without specific prior written permission.
31			*
32			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
33			* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
34			* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
35			* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
36			* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
37			* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
38			* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
39			* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
40			* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41			* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42			*/
43
44			#include <sys/queue.h>
45			#include <sys/stat.h>
46			#include <sys/sysctl.h>
47			#include <sys/ucred.h>
48			#define _KERNEL /* for DTYPE_VNODE */
49			#include <sys/file.h>
50			#undef _KERNEL
51
52			#include <err.h>
53			#include <fcntl.h>
54			#include <pwd.h>
55			#include <signal.h>
56			#include <stdio.h>
57			#include <stdlib.h>
58			#include <string.h>
59			#include <unistd.h>
60
61			#include "fstat.h"
62
63			/*
64			* Returns 1 if the file watched (fa) is equivalent
65			* to a file held by a process (kf), else 0.
66			*/
67			static int
68			match(struct filearg fa, struct kinfo_file kf)
69			{
70			if (fa->dev == kf->va_fsid) {
71			if (cflg)
72			return (1);
73			if (fa->ino == kf->va_fileid)
74			return (1);
75			}
76			return (0);
77			}
78
79			/*
80			* Examine kinfo_file struct and record the details if they
81			* match a watched file.
82			*/
83			void
84			fuser_check(struct kinfo_file *kf)
85			{
86			struct filearg *fa;
87			struct fuser *fu;
88
89			if (kf->f_type != DTYPE_VNODE)
90			return;
91
92			SLIST_FOREACH(fa, &fileargs, next) {
93			if (!match(fa, kf))
94			continue;
95
96			/*
97			* This assumes that kinfo_files2 returns all files
98			* associated with a process in a contiguous block.
99			*/
100			if (TAILQ_EMPTY(&fa->fusers) \|\| kf->p_pid !=
101			(fu = TAILQ_LAST(&fa->fusers, fuserhead))->pid) {
102			fu = malloc(sizeof(*fu));
103			if (fu == NULL)
104			err(1, NULL);
105			fu->pid = kf->p_pid;
106			fu->uid = kf->p_uid;
107			fu->flags = 0;
108			TAILQ_INSERT_TAIL(&fa->fusers, fu, tq);
109			}
110			switch (kf->fd_fd) {
111			case KERN_FILE_CDIR:
112			fu->flags \|= F_CWD;
113			break;
114			case KERN_FILE_RDIR:
115			fu->flags \|= F_ROOT;
116			break;
117			case KERN_FILE_TEXT:
118			fu->flags \|= F_TEXT;
119			break;
120			case KERN_FILE_TRACE:
121			/* ignore */
122			break;
123			default:
124			fu->flags \|= F_OPEN;
125			break;
126			}
127			}
128			}
129
130			/*
131			* Print out the specfics for a given file/filesystem
132			*/
133			static void
134			printfu(struct fuser *fu)
135			{
136			struct passwd *pwd;
137
138			printf("%d", fu->pid);
139			fflush(stdout);
140
141			if (fu->flags & F_CWD)
142			fprintf(stderr, "c");
143
144			if (fu->flags & F_ROOT)
145			fprintf(stderr, "r");
146
147			if (fu->flags & F_TEXT)
148			fprintf(stderr, "t");
149
150			if (uflg) {
151			pwd = getpwuid(fu->uid);
152			if (pwd != NULL)
153			fprintf(stderr, "(%s)", pwd->pw_name);
154			else
155			fprintf(stderr, "(%d)", fu->uid);
156			}
157
158			putchar(' ');
159			}
160
161			/*
162			* For each file, print matching process info and optionally send a signal.
163			*/
164			void
165			fuser_run(void)
166			{
167			struct filearg *fa;
168			struct fuser *fu;
169			pid_t mypid = getpid();
170
171			SLIST_FOREACH(fa, &fileargs, next) {
172			fprintf(stderr, "%s: ", fa->name);
173			TAILQ_FOREACH(fu, &fa->fusers, tq) {
174			printfu(fu);
175			if (sflg && fu->pid != mypid) {
176			kill(fu->pid, signo);
177			}
178			}
179			fflush(stdout);
180			fprintf(stderr, "\n");
181			}
182			}