GCOV - Varnish Cache


/*-
 * Copyright (c) 2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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 AUTHOR 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 AUTHOR 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.
 *
 * Jailing
 *
 */

#include "config.h"

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
//lint -efile(766, sys/statvfs.h)
#include <sys/statvfs.h>

#include "mgt/mgt.h"
#include "common/heritage.h"
#include "vav.h"

/**********************************************************************
 * A "none" jail implementation which doesn't do anything.
 */

static int v_matchproto_(jail_init_f)
vjn_init(char **args)
{
        if (args != NULL && *args != NULL)
                ARGV_ERR("-jnone takes no arguments.\n");
        return (0);
}

static void v_matchproto_(jail_master_f)
vjn_master(enum jail_master_e jme)
{
        (void)jme;
}

static void v_matchproto_(jail_subproc_f)
vjn_subproc(enum jail_subproc_e jse)
{
        (void)jse;
}

static const struct jail_tech jail_tech_none = {
        .magic =        JAIL_TECH_MAGIC,
        .name =         "none",
        .init =         vjn_init,
        .master =       vjn_master,
        .subproc =      vjn_subproc,
};

/**********************************************************************/

static const struct jail_tech *vjt;

static const struct choice vj_choice[] = {
#ifdef HAVE_SETPPRIV
        { "solaris",    &jail_tech_solaris },
#endif
#ifdef __linux__
        { "linux",      &jail_tech_linux },
#endif
        { "unix",       &jail_tech_unix },
        { "none",       &jail_tech_none },
        { NULL,         NULL },
};

void
VJ_Init(const char *j_arg)
{
        char **av;
        int i;

        if (j_arg != NULL) {
                av = VAV_Parse(j_arg, NULL, ARGV_COMMA);
                AN(av);
                if (av[0] != NULL)
                        ARGV_ERR("-j argument: %s\n", av[0]);
                if (av[1] == NULL)
                        ARGV_ERR("-j argument is empty\n");
                vjt = MGT_Pick(vj_choice, av[1], "jail");
                CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
                if (vjt->init(av + 2))
                        ARGV_EXIT;
                VAV_Free(av);
        } else {
                /*
                 * Go through list of jail technologies until one
                 * succeeds, falling back to "none".
                 */
                for (i = 0; vj_choice[i].name != NULL; i++) {
                        vjt = vj_choice[i].ptr;
                        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
                        if (!vjt->init(NULL))
                                break;
                }
        }
        VSB_printf(vident, ",-j%s", vjt->name);
}

void
VJ_master(enum jail_master_e jme)
{
        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
        vjt->master(jme);
}

void
VJ_subproc(enum jail_subproc_e jse)
{
        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
        vjt->subproc(jse);
}

int
VJ_make_workdir(const char *dname, struct vsb *vsb)
{
        int i;

        AN(dname);
        AN(vsb);
        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);

        if (vjt->make_workdir != NULL) {
                i = vjt->make_workdir(dname, NULL, vsb);
                if (i)
                        return (i);
                VJ_master(JAIL_MASTER_FILE);
        } else {
                VJ_master(JAIL_MASTER_FILE);
                if (mkdir(dname, 0755) < 0 && errno != EEXIST) {
                        VSB_printf(vsb,
                            "Cannot create working directory '%s': %s\n",
                            dname, VAS_errtxt(errno));
                        return (1);
                }
        }

        if (chdir(dname) < 0) {
                VSB_printf(vsb, "Cannot change to working directory '%s': %s\n",
                    dname, VAS_errtxt(errno));
                return (1);
        }

        i = open("_.testfile", O_RDWR|O_CREAT|O_EXCL, 0600);
        if (i < 0) {
                VSB_printf(vsb, "Cannot create test-file in %s (%s)\n"
                    "Check permissions (or delete old directory)\n",
                    dname, VAS_errtxt(errno));
                return (1);
        }

#ifdef ST_NOEXEC
        struct statvfs vfs[1];

        /* deliberately ignore fstatvfs errors */
        if (! fstatvfs(i, vfs) && vfs->f_flag & ST_NOEXEC) {
                closefd(&i);
                AZ(unlink("_.testfile"));
                VSB_printf(vsb, "Working directory %s (-n argument) "
                    "cannot reside on a file system mounted noexec\n", dname);
                return (1);
        }
#endif

        closefd(&i);
        AZ(unlink("_.testfile"));
        VJ_master(JAIL_MASTER_LOW);
        return (0);
}

int
VJ_make_subdir(const char *dname, const char *what, struct vsb *vsb)
{
        int e;

        AN(dname);
        AN(what);
        AN(vsb);
        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
        if (vjt->make_subdir != NULL)
                return (vjt->make_subdir(dname, what, vsb));

        VJ_master(JAIL_MASTER_FILE);
        if (mkdir(dname, 0755) < 0 && errno != EEXIST) {
                e = errno;
                VSB_printf(vsb, "Cannot create %s directory '%s': %s\n",
                    what, dname, VAS_errtxt(e));
                return (1);
        }
        VJ_master(JAIL_MASTER_LOW);
        return (0);
}

void
VJ_unlink(const char *fname, int ignore_enoent)
{
        VJ_master(JAIL_MASTER_FILE);
        if (unlink(fname)) {
                if (errno != ENOENT || !ignore_enoent)
                    fprintf(stderr, "Could not delete '%s': %s\n",
                        fname, strerror(errno));
        }
        VJ_master(JAIL_MASTER_LOW);
}

void
VJ_rmdir(const char *dname)
{
        VJ_master(JAIL_MASTER_FILE);
        if (rmdir(dname)) {
                fprintf(stderr, "Could not rmdir '%s': %s\n",
                    dname, strerror(errno));
        }
        VJ_master(JAIL_MASTER_LOW);
}

void
VJ_fix_fd(int fd, enum jail_fixfd_e what)
{

        CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
        if (vjt->fixfd != NULL)
                vjt->fixfd(fd, what);
}

		varnish-cache/bin/varnishd/mgt/mgt_jail.c
0		/*-
1		* Copyright (c) 2015 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		* 1. Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in the
15		* documentation and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27		* SUCH DAMAGE.
28		*
29		* Jailing
30		*
31		*/
32
33		#include "config.h"
34
35		#include <fcntl.h>
36		#include <stdio.h>
37		#include <stdlib.h>
38		#include <string.h>
39		#include <unistd.h>
40		#include <sys/stat.h>
41		//lint -efile(766, sys/statvfs.h)
42		#include <sys/statvfs.h>
43
44		#include "mgt/mgt.h"
45		#include "common/heritage.h"
46		#include "vav.h"
47
48		/**********************************************************************
49		* A "none" jail implementation which doesn't do anything.
50		*/
51
52		static int v_matchproto_(jail_init_f)
53	39760	vjn_init(char **args)
54		{
55	39760	if (args != NULL && *args != NULL)
56	0	ARGV_ERR("-jnone takes no arguments.\n");
57	39760	return (0);
58		}
59
60		static void v_matchproto_(jail_master_f)
61	2427646	vjn_master(enum jail_master_e jme)
62		{
63	2427646	(void)jme;
64	2427646	}
65
66		static void v_matchproto_(jail_subproc_f)
67	195271	vjn_subproc(enum jail_subproc_e jse)
68		{
69	195271	(void)jse;
70	195271	}
71
72		static const struct jail_tech jail_tech_none = {
73		.magic = JAIL_TECH_MAGIC,
74		.name = "none",
75		.init = vjn_init,
76		.master = vjn_master,
77		.subproc = vjn_subproc,
78		};
79
80		/**********************************************************************/
81
82		static const struct jail_tech *vjt;
83
84		static const struct choice vj_choice[] = {
85		#ifdef HAVE_SETPPRIV
86		{ "solaris", &jail_tech_solaris },
87		#endif
88		#ifdef __linux__
89		{ "linux", &jail_tech_linux },
90		#endif
91		{ "unix", &jail_tech_unix },
92		{ "none", &jail_tech_none },
93		{ NULL, NULL },
94		};
95
96		void
97	40560	VJ_Init(const char *j_arg)
98		{
99		char **av;
100		int i;
101
102	40560	if (j_arg != NULL) {
103	400	av = VAV_Parse(j_arg, NULL, ARGV_COMMA);
104	400	AN(av);
105	400	if (av[0] != NULL)
106	0	ARGV_ERR("-j argument: %s\n", av[0]);
107	400	if (av[1] == NULL)
108	0	ARGV_ERR("-j argument is empty\n");
109	400	vjt = MGT_Pick(vj_choice, av[1], "jail");
110	400	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
111	400	if (vjt->init(av + 2))
112	0	ARGV_EXIT;
113	400	VAV_Free(av);
114	400	} else {
115		/*
116		* Go through list of jail technologies until one
117		* succeeds, falling back to "none".
118		*/
119	79920	for (i = 0; vj_choice[i].name != NULL; i++) {
120	79920	vjt = vj_choice[i].ptr;
121	79920	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
122	79920	if (!vjt->init(NULL))
123	40160	break;
124	39760	}
125		}
126	40560	VSB_printf(vident, ",-j%s", vjt->name);
127	40560	}
128
129		void
130	2456486	VJ_master(enum jail_master_e jme)
131		{
132	2456486	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
133	2456486	vjt->master(jme);
134	2456486	}
135
136		void
137	196391	VJ_subproc(enum jail_subproc_e jse)
138		{
139	196391	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
140	196391	vjt->subproc(jse);
141	196391	}
142
143		int
144	38800	VJ_make_workdir(const char dname, struct vsb vsb)
145		{
146		int i;
147
148	38800	AN(dname);
149	38800	AN(vsb);
150	38800	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
151
152	38800	if (vjt->make_workdir != NULL) {
153	560	i = vjt->make_workdir(dname, NULL, vsb);
154	560	if (i)
155	0	return (i);
156	560	VJ_master(JAIL_MASTER_FILE);
157	560	} else {
158	38240	VJ_master(JAIL_MASTER_FILE);
159	38240	if (mkdir(dname, 0755) < 0 && errno != EEXIST) {
160	0	VSB_printf(vsb,
161		"Cannot create working directory '%s': %s\n",
162	0	dname, VAS_errtxt(errno));
163	0	return (1);
164		}
165		}
166
167	38800	if (chdir(dname) < 0) {
168	0	VSB_printf(vsb, "Cannot change to working directory '%s': %s\n",
169	0	dname, VAS_errtxt(errno));
170	0	return (1);
171		}
172
173	38800	i = open("_.testfile", O_RDWR\|O_CREAT\|O_EXCL, 0600);
174	38800	if (i < 0) {
175	0	VSB_printf(vsb, "Cannot create test-file in %s (%s)\n"
176		"Check permissions (or delete old directory)\n",
177	0	dname, VAS_errtxt(errno));
178	0	return (1);
179		}
180
181		#ifdef ST_NOEXEC
182		struct statvfs vfs[1];
183
184		/* deliberately ignore fstatvfs errors */
185		if (! fstatvfs(i, vfs) && vfs->f_flag & ST_NOEXEC) {
186		closefd(&i);
187		AZ(unlink("_.testfile"));
188		VSB_printf(vsb, "Working directory %s (-n argument) "
189		"cannot reside on a file system mounted noexec\n", dname);
190		return (1);
191		}
192		#endif
193
194	38800	closefd(&i);
195	38800	AZ(unlink("_.testfile"));
196	38800	VJ_master(JAIL_MASTER_LOW);
197	38800	return (0);
198	38800	}
199
200		int
201	138640	VJ_make_subdir(const char dname, const char what, struct vsb *vsb)
202		{
203		int e;
204
205	138640	AN(dname);
206	138640	AN(what);
207	138640	AN(vsb);
208	138640	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
209	138640	if (vjt->make_subdir != NULL)
210	1680	return (vjt->make_subdir(dname, what, vsb));
211
212	136960	VJ_master(JAIL_MASTER_FILE);
213	136960	if (mkdir(dname, 0755) < 0 && errno != EEXIST) {
214	0	e = errno;
215	0	VSB_printf(vsb, "Cannot create %s directory '%s': %s\n",
216	0	what, dname, VAS_errtxt(e));
217	0	return (1);
218		}
219	136960	VJ_master(JAIL_MASTER_LOW);
220	136960	return (0);
221	138640	}
222
223		void
224	133440	VJ_unlink(const char *fname, int ignore_enoent)
225		{
226	133440	VJ_master(JAIL_MASTER_FILE);
227	133440	if (unlink(fname)) {
228	11680	if (errno != ENOENT \|\| !ignore_enoent)
229	0	fprintf(stderr, "Could not delete '%s': %s\n",
230	0	fname, strerror(errno));
231	11680	}
232	133440	VJ_master(JAIL_MASTER_LOW);
233	133440	}
234
235		void
236	12320	VJ_rmdir(const char *dname)
237		{
238	12320	VJ_master(JAIL_MASTER_FILE);
239	12320	if (rmdir(dname)) {
240	80	fprintf(stderr, "Could not rmdir '%s': %s\n",
241	40	dname, strerror(errno));
242	40	}
243	12320	VJ_master(JAIL_MASTER_LOW);
244	12320	}
245
246		void
247	117440	VJ_fix_fd(int fd, enum jail_fixfd_e what)
248		{
249
250	117440	CHECK_OBJ_NOTNULL(vjt, JAIL_TECH_MAGIC);
251	117440	if (vjt->fixfd != NULL)
252	1800	vjt->fixfd(fd, what);
253	117440	}