[thirdparty/systemd.git] / src / core / smack-setup.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  Copyright (C) 2013 Intel Corporation
  Authors:
        Nathaniel Chen <nathaniel.chen@intel.com>
***/

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>

#include "alloc-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "macro.h"
#include "smack-setup.h"
#include "string-util.h"
#include "util.h"

#if ENABLE_SMACK

static int write_access2_rules(const char* srcdir) {
        _cleanup_close_ int load2_fd = -1, change_fd = -1;
        _cleanup_closedir_ DIR *dir = NULL;
        struct dirent *entry;
        char buf[NAME_MAX];
        int dfd = -1;
        int r = 0;

        load2_fd = open("/sys/fs/smackfs/load2", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
        if (load2_fd < 0)  {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/load2': %m");
                return -errno; /* negative error */
        }

        change_fd = open("/sys/fs/smackfs/change-rule", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
        if (change_fd < 0)  {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/change-rule': %m");
                return -errno; /* negative error */
        }

        /* write rules to load2 or change-rule from every file in the directory */
        dir = opendir(srcdir);
        if (!dir) {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to opendir '%s': %m", srcdir);
                return errno; /* positive on purpose */
        }

        dfd = dirfd(dir);
        assert(dfd >= 0);

        FOREACH_DIRENT(entry, dir, return 0) {
                int fd;
                _cleanup_fclose_ FILE *policy = NULL;

                if (!dirent_is_file(entry))
                        continue;

                fd = openat(dfd, entry->d_name, O_RDONLY|O_CLOEXEC);
                if (fd < 0) {
                        if (r == 0)
                                r = -errno;
                        log_warning_errno(errno, "Failed to open '%s': %m", entry->d_name);
                        continue;
                }

                policy = fdopen(fd, "re");
                if (!policy) {
                        if (r == 0)
                                r = -errno;
                        safe_close(fd);
                        log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
                        continue;
                }

                /* load2 write rules in the kernel require a line buffered stream */
                FOREACH_LINE(buf, policy,
                             log_error_errno(errno, "Failed to read line from '%s': %m",
                                             entry->d_name)) {

                        _cleanup_free_ char *sbj = NULL, *obj = NULL, *acc1 = NULL, *acc2 = NULL;

                        if (isempty(truncate_nl(buf)) || strchr(COMMENTS, *buf))
                                continue;

                        /* if 3 args -> load rule   : subject object access1 */
                        /* if 4 args -> change rule : subject object access1 access2 */
                        if (sscanf(buf, "%ms %ms %ms %ms", &sbj, &obj, &acc1, &acc2) < 3) {
                                log_error_errno(errno, "Failed to parse rule '%s' in '%s', ignoring.", buf, entry->d_name);
                                continue;
                        }

                        if (write(isempty(acc2) ? load2_fd : change_fd, buf, strlen(buf)) < 0) {
                                if (r == 0)
                                        r = -errno;
                                log_error_errno(errno, "Failed to write '%s' to '%s' in '%s'",
                                                buf, isempty(acc2) ? "/sys/fs/smackfs/load2" : "/sys/fs/smackfs/change-rule", entry->d_name);
                        }
                }
        }

        return r;
}

static int write_cipso2_rules(const char* srcdir) {
        _cleanup_close_ int cipso2_fd = -1;
        _cleanup_closedir_ DIR *dir = NULL;
        struct dirent *entry;
        char buf[NAME_MAX];
        int dfd = -1;
        int r = 0;

        cipso2_fd = open("/sys/fs/smackfs/cipso2", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
        if (cipso2_fd < 0)  {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/cipso2': %m");
                return -errno; /* negative error */
        }

        /* write rules to cipso2 from every file in the directory */
        dir = opendir(srcdir);
        if (!dir) {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to opendir '%s': %m", srcdir);
                return errno; /* positive on purpose */
        }

        dfd = dirfd(dir);
        assert(dfd >= 0);

        FOREACH_DIRENT(entry, dir, return 0) {
                int fd;
                _cleanup_fclose_ FILE *policy = NULL;

                if (!dirent_is_file(entry))
                        continue;

                fd = openat(dfd, entry->d_name, O_RDONLY|O_CLOEXEC);
                if (fd < 0) {
                        if (r == 0)
                                r = -errno;
                        log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
                        continue;
                }

                policy = fdopen(fd, "re");
                if (!policy) {
                        if (r == 0)
                                r = -errno;
                        safe_close(fd);
                        log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
                        continue;
                }

                /* cipso2 write rules in the kernel require a line buffered stream */
                FOREACH_LINE(buf, policy,
                             log_error_errno(errno, "Failed to read line from '%s': %m",
                                             entry->d_name)) {

                        if (isempty(truncate_nl(buf)) || strchr(COMMENTS, *buf))
                                continue;

                        if (write(cipso2_fd, buf, strlen(buf)) < 0) {
                                if (r == 0)
                                        r = -errno;
                                log_error_errno(errno, "Failed to write '%s' to '/sys/fs/smackfs/cipso2' in '%s'",
                                                buf, entry->d_name);
                                break;
                        }
                }
        }

        return r;
}

static int write_netlabel_rules(const char* srcdir) {
        _cleanup_fclose_ FILE *dst = NULL;
        _cleanup_closedir_ DIR *dir = NULL;
        struct dirent *entry;
        char buf[NAME_MAX];
        int dfd = -1;
        int r = 0;

        dst = fopen("/sys/fs/smackfs/netlabel", "we");
        if (!dst)  {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to open /sys/fs/smackfs/netlabel: %m");
                return -errno; /* negative error */
        }

        /* write rules to dst from every file in the directory */
        dir = opendir(srcdir);
        if (!dir) {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to opendir %s: %m", srcdir);
                return errno; /* positive on purpose */
        }

        dfd = dirfd(dir);
        assert(dfd >= 0);

        FOREACH_DIRENT(entry, dir, return 0) {
                int fd;
                _cleanup_fclose_ FILE *policy = NULL;

                fd = openat(dfd, entry->d_name, O_RDONLY|O_CLOEXEC);
                if (fd < 0) {
                        if (r == 0)
                                r = -errno;
                        log_warning_errno(errno, "Failed to open %s: %m", entry->d_name);
                        continue;
                }

                policy = fdopen(fd, "re");
                if (!policy) {
                        if (r == 0)
                                r = -errno;
                        safe_close(fd);
                        log_error_errno(errno, "Failed to open %s: %m", entry->d_name);
                        continue;
                }

                (void) __fsetlocking(policy, FSETLOCKING_BYCALLER);

                /* load2 write rules in the kernel require a line buffered stream */
                FOREACH_LINE(buf, policy,
                             log_error_errno(errno, "Failed to read line from %s: %m", entry->d_name)) {

                        int q;

                        if (!fputs(buf, dst)) {
                                if (r == 0)
                                        r = -EINVAL;
                                log_error_errno(errno, "Failed to write line to /sys/fs/smackfs/netlabel");
                                break;
                        }
                        q = fflush_and_check(dst);
                        if (q < 0) {
                                if (r == 0)
                                        r = q;
                                log_error_errno(q, "Failed to flush writes to /sys/fs/smackfs/netlabel: %m");
                                break;
                        }
                }
        }

        return r;
}

static int write_onlycap_list(void) {
        _cleanup_close_ int onlycap_fd = -1;
        _cleanup_free_ char *list = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        size_t len = 0, allocated = 0;
        char buf[LINE_MAX];
        int r;

        f = fopen("/etc/smack/onlycap", "re");
        if (!f) {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to read '/etc/smack/onlycap'");
                return errno == ENOENT ? ENOENT : -errno;
        }

        FOREACH_LINE(buf, f, return -errno) {
                size_t l;

                if (isempty(truncate_nl(buf)) || strchr(COMMENTS, *buf))
                        continue;

                l = strlen(buf);
                if (!GREEDY_REALLOC(list, allocated, len + l + 1))
                        return log_oom();

                stpcpy(list + len, buf)[0] = ' ';
                len += l + 1;
        }

        if (!len)
                return 0;

        list[len - 1] = 0;

        onlycap_fd = open("/sys/fs/smackfs/onlycap", O_WRONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
        if (onlycap_fd < 0) {
                if (errno != ENOENT)
                        log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/onlycap'");
                return -errno; /* negative error */
        }

        r = write(onlycap_fd, list, len);
        if (r < 0)
                return log_error_errno(errno, "Failed to write onlycap list(%s) to '/sys/fs/smackfs/onlycap'", list);

        return 0;
}

#endif

int mac_smack_setup(bool *loaded_policy) {

#if ENABLE_SMACK

        int r;

        assert(loaded_policy);

        r = write_access2_rules("/etc/smack/accesses.d/");
        switch(r) {
        case -ENOENT:
                log_debug("Smack is not enabled in the kernel.");
                return 0;
        case ENOENT:
                log_debug("Smack access rules directory '/etc/smack/accesses.d/' not found");
                return 0;
        case 0:
                log_info("Successfully loaded Smack policies.");
                break;
        default:
                log_warning_errno(r, "Failed to load Smack access rules, ignoring: %m");
                return 0;
        }

#ifdef SMACK_RUN_LABEL
        r = write_string_file("/proc/self/attr/current", SMACK_RUN_LABEL, 0);
        if (r < 0)
                log_warning_errno(r, "Failed to set SMACK label \"" SMACK_RUN_LABEL "\" on self: %m");
        r = write_string_file("/sys/fs/smackfs/ambient", SMACK_RUN_LABEL, 0);
        if (r < 0)
                log_warning_errno(r, "Failed to set SMACK ambient label \"" SMACK_RUN_LABEL "\": %m");
        r = write_string_file("/sys/fs/smackfs/netlabel",
                              "0.0.0.0/0 " SMACK_RUN_LABEL, 0);
        if (r < 0)
                log_warning_errno(r, "Failed to set SMACK netlabel rule \"0.0.0.0/0 " SMACK_RUN_LABEL "\": %m");
        r = write_string_file("/sys/fs/smackfs/netlabel", "127.0.0.1 -CIPSO", 0);
        if (r < 0)
                log_warning_errno(r, "Failed to set SMACK netlabel rule \"127.0.0.1 -CIPSO\": %m");
#endif

        r = write_cipso2_rules("/etc/smack/cipso.d/");
        switch(r) {
        case -ENOENT:
                log_debug("Smack/CIPSO is not enabled in the kernel.");
                return 0;
        case ENOENT:
                log_debug("Smack/CIPSO access rules directory '/etc/smack/cipso.d/' not found");
                break;
        case 0:
                log_info("Successfully loaded Smack/CIPSO policies.");
                break;
        default:
                log_warning_errno(r, "Failed to load Smack/CIPSO access rules, ignoring: %m");
                break;
        }

        r = write_netlabel_rules("/etc/smack/netlabel.d/");
        switch(r) {
        case -ENOENT:
                log_debug("Smack/CIPSO is not enabled in the kernel.");
                return 0;
        case ENOENT:
                log_debug("Smack network host rules directory '/etc/smack/netlabel.d/' not found");
                break;
        case 0:
                log_info("Successfully loaded Smack network host rules.");
                break;
        default:
                log_warning_errno(r, "Failed to load Smack network host rules: %m, ignoring.");
                break;
        }

        r = write_onlycap_list();
        switch(r) {
        case -ENOENT:
                log_debug("Smack is not enabled in the kernel.");
                break;
        case ENOENT:
                log_debug("Smack onlycap list file '/etc/smack/onlycap' not found");
                break;
        case 0:
                log_info("Successfully wrote Smack onlycap list.");
                break;
        default:
                log_emergency_errno(r, "Failed to write Smack onlycap list.");
                return r;
        }

        *loaded_policy = true;

#endif

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
ffbd2c4d	2	/***
ffbd2c4d NC	3	Copyright (C) 2013 Intel Corporation
	4	Authors:
	5	Nathaniel Chen <nathaniel.chen@intel.com>
ffbd2c4d NC	6	***/
ffbd2c4d NC	7
07630cea	8	#include <dirent.h>
ffbd2c4d	9	#include <errno.h>
ffbd2c4d	10	#include <fcntl.h>
07630cea	11	#include <stdio.h>
0d536673	12	#include <stdio_ext.h>
07630cea LP	13	#include <stdlib.h>
07630cea LP	14	#include <string.h>
ffbd2c4d	15
b5efdb8a	16	#include "alloc-util.h"
a0956174	17	#include "dirent-util.h"
3ffd4af2	18	#include "fd-util.h"
8b197c3a	19	#include "fileio.h"
ffbd2c4d	20	#include "log.h"
07630cea	21	#include "macro.h"
3ffd4af2	22	#include "smack-setup.h"
07630cea LP	23	#include "string-util.h"
07630cea LP	24	#include "util.h"
ffbd2c4d	25
f9fa32f0	26	#if ENABLE_SMACK
2b3e18de	27
6656aefb WC	28	static int write_access2_rules(const char* srcdir) {
6656aefb WC	29	_cleanup_close_ int load2_fd = -1, change_fd = -1;
ffbd2c4d NC	30	_cleanup_closedir_ DIR *dir = NULL;
	31	struct dirent *entry;
	32	char buf[NAME_MAX];
	33	int dfd = -1;
a4783bd1	34	int r = 0;
ffbd2c4d	35
6656aefb WC	36	load2_fd = open("/sys/fs/smackfs/load2", O_RDWR\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	37	if (load2_fd < 0) {
	38	if (errno != ENOENT)
	39	log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/load2': %m");
	40	return -errno; /* negative error */
	41	}
	42
	43	change_fd = open("/sys/fs/smackfs/change-rule", O_RDWR\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	44	if (change_fd < 0) {
a4783bd1	45	if (errno != ENOENT)
6656aefb	46	log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/change-rule': %m");
a4783bd1	47	return -errno; /* negative error */
ffbd2c4d NC	48	}
ffbd2c4d NC	49
6656aefb	50	/* write rules to load2 or change-rule from every file in the directory */
a4783bd1	51	dir = opendir(srcdir);
ffbd2c4d	52	if (!dir) {
a4783bd1	53	if (errno != ENOENT)
6656aefb	54	log_warning_errno(errno, "Failed to opendir '%s': %m", srcdir);
a4783bd1	55	return errno; /* positive on purpose */
ffbd2c4d NC	56	}
	57
	58	dfd = dirfd(dir);
fea7838e	59	assert(dfd >= 0);
ffbd2c4d NC	60
ffbd2c4d NC	61	FOREACH_DIRENT(entry, dir, return 0) {
a4783bd1	62	int fd;
ffbd2c4d	63	_cleanup_fclose_ FILE *policy = NULL;
ffbd2c4d	64
6656aefb WC	65	if (!dirent_is_file(entry))
	66	continue;
	67
a4783bd1 ZJS	68	fd = openat(dfd, entry->d_name, O_RDONLY\|O_CLOEXEC);
	69	if (fd < 0) {
	70	if (r == 0)
	71	r = -errno;
6656aefb	72	log_warning_errno(errno, "Failed to open '%s': %m", entry->d_name);
ffbd2c4d NC	73	continue;
	74	}
	75
a4783bd1	76	policy = fdopen(fd, "re");
ffbd2c4d	77	if (!policy) {
a4783bd1 ZJS	78	if (r == 0)
a4783bd1 ZJS	79	r = -errno;
03e334a1	80	safe_close(fd);
6656aefb	81	log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
ffbd2c4d NC	82	continue;
	83	}
	84
ffbd2c4d	85	/* load2 write rules in the kernel require a line buffered stream */
fea7838e	86	FOREACH_LINE(buf, policy,
6656aefb WC	87	log_error_errno(errno, "Failed to read line from '%s': %m",
	88	entry->d_name)) {
	89
	90	_cleanup_free_ char sbj = NULL, obj = NULL, acc1 = NULL, acc2 = NULL;
	91
459aafc6	92	if (isempty(truncate_nl(buf)) \|\| strchr(COMMENTS, *buf))
6656aefb WC	93	continue;
	94
	95	/* if 3 args -> load rule : subject object access1 */
	96	/* if 4 args -> change rule : subject object access1 access2 */
	97	if (sscanf(buf, "%ms %ms %ms %ms", &sbj, &obj, &acc1, &acc2) < 3) {
	98	log_error_errno(errno, "Failed to parse rule '%s' in '%s', ignoring.", buf, entry->d_name);
	99	continue;
	100	}
	101
	102	if (write(isempty(acc2) ? load2_fd : change_fd, buf, strlen(buf)) < 0) {
a4783bd1	103	if (r == 0)
6656aefb WC	104	r = -errno;
	105	log_error_errno(errno, "Failed to write '%s' to '%s' in '%s'",
	106	buf, isempty(acc2) ? "/sys/fs/smackfs/load2" : "/sys/fs/smackfs/change-rule", entry->d_name);
a4783bd1	107	}
6656aefb WC	108	}
	109	}
	110
	111	return r;
	112	}
	113
	114	static int write_cipso2_rules(const char* srcdir) {
	115	_cleanup_close_ int cipso2_fd = -1;
	116	_cleanup_closedir_ DIR *dir = NULL;
	117	struct dirent *entry;
	118	char buf[NAME_MAX];
	119	int dfd = -1;
	120	int r = 0;
	121
	122	cipso2_fd = open("/sys/fs/smackfs/cipso2", O_RDWR\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	123	if (cipso2_fd < 0) {
	124	if (errno != ENOENT)
	125	log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/cipso2': %m");
	126	return -errno; /* negative error */
	127	}
	128
	129	/* write rules to cipso2 from every file in the directory */
	130	dir = opendir(srcdir);
	131	if (!dir) {
	132	if (errno != ENOENT)
	133	log_warning_errno(errno, "Failed to opendir '%s': %m", srcdir);
	134	return errno; /* positive on purpose */
	135	}
	136
	137	dfd = dirfd(dir);
	138	assert(dfd >= 0);
	139
	140	FOREACH_DIRENT(entry, dir, return 0) {
	141	int fd;
	142	_cleanup_fclose_ FILE *policy = NULL;
	143
	144	if (!dirent_is_file(entry))
	145	continue;
	146
	147	fd = openat(dfd, entry->d_name, O_RDONLY\|O_CLOEXEC);
	148	if (fd < 0) {
	149	if (r == 0)
	150	r = -errno;
	151	log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
	152	continue;
	153	}
	154
	155	policy = fdopen(fd, "re");
	156	if (!policy) {
	157	if (r == 0)
	158	r = -errno;
	159	safe_close(fd);
	160	log_error_errno(errno, "Failed to open '%s': %m", entry->d_name);
	161	continue;
	162	}
	163
	164	/* cipso2 write rules in the kernel require a line buffered stream */
	165	FOREACH_LINE(buf, policy,
	166	log_error_errno(errno, "Failed to read line from '%s': %m",
	167	entry->d_name)) {
	168
459aafc6	169	if (isempty(truncate_nl(buf)) \|\| strchr(COMMENTS, *buf))
6656aefb WC	170	continue;
	171
	172	if (write(cipso2_fd, buf, strlen(buf)) < 0) {
a4783bd1 ZJS	173	if (r == 0)
a4783bd1 ZJS	174	r = -errno;
6656aefb WC	175	log_error_errno(errno, "Failed to write '%s' to '/sys/fs/smackfs/cipso2' in '%s'",
6656aefb WC	176	buf, entry->d_name);
a4783bd1 ZJS	177	break;
a4783bd1 ZJS	178	}
ffbd2c4d NC	179	}
	180	}
	181
6656aefb	182	return r;
a4783bd1 ZJS	183	}
a4783bd1 ZJS	184
ae176752 CS	185	static int write_netlabel_rules(const char* srcdir) {
	186	_cleanup_fclose_ FILE *dst = NULL;
	187	_cleanup_closedir_ DIR *dir = NULL;
	188	struct dirent *entry;
	189	char buf[NAME_MAX];
	190	int dfd = -1;
	191	int r = 0;
	192
	193	dst = fopen("/sys/fs/smackfs/netlabel", "we");
	194	if (!dst) {
	195	if (errno != ENOENT)
	196	log_warning_errno(errno, "Failed to open /sys/fs/smackfs/netlabel: %m");
	197	return -errno; /* negative error */
	198	}
	199
	200	/* write rules to dst from every file in the directory */
	201	dir = opendir(srcdir);
	202	if (!dir) {
	203	if (errno != ENOENT)
	204	log_warning_errno(errno, "Failed to opendir %s: %m", srcdir);
	205	return errno; /* positive on purpose */
	206	}
	207
	208	dfd = dirfd(dir);
	209	assert(dfd >= 0);
	210
	211	FOREACH_DIRENT(entry, dir, return 0) {
	212	int fd;
	213	_cleanup_fclose_ FILE *policy = NULL;
	214
	215	fd = openat(dfd, entry->d_name, O_RDONLY\|O_CLOEXEC);
	216	if (fd < 0) {
	217	if (r == 0)
	218	r = -errno;
	219	log_warning_errno(errno, "Failed to open %s: %m", entry->d_name);
	220	continue;
	221	}
	222
	223	policy = fdopen(fd, "re");
	224	if (!policy) {
	225	if (r == 0)
	226	r = -errno;
	227	safe_close(fd);
	228	log_error_errno(errno, "Failed to open %s: %m", entry->d_name);
	229	continue;
	230	}
	231
0d536673 LP	232	(void) __fsetlocking(policy, FSETLOCKING_BYCALLER);
0d536673 LP	233
ae176752 CS	234	/* load2 write rules in the kernel require a line buffered stream */
ae176752 CS	235	FOREACH_LINE(buf, policy,
0d536673 LP	236	log_error_errno(errno, "Failed to read line from %s: %m", entry->d_name)) {
	237
	238	int q;
	239
	240	if (!fputs(buf, dst)) {
ae176752 CS	241	if (r == 0)
	242	r = -EINVAL;
	243	log_error_errno(errno, "Failed to write line to /sys/fs/smackfs/netlabel");
	244	break;
	245	}
0d536673 LP	246	q = fflush_and_check(dst);
0d536673 LP	247	if (q < 0) {
ae176752	248	if (r == 0)
0d536673 LP	249	r = q;
0d536673 LP	250	log_error_errno(q, "Failed to flush writes to /sys/fs/smackfs/netlabel: %m");
ae176752 CS	251	break;
	252	}
	253	}
	254	}
	255
7f508f2c	256	return r;
ae176752 CS	257	}
ae176752 CS	258
217f95db WC	259	static int write_onlycap_list(void) {
	260	_cleanup_close_ int onlycap_fd = -1;
	261	_cleanup_free_ char *list = NULL;
	262	_cleanup_fclose_ FILE *f = NULL;
	263	size_t len = 0, allocated = 0;
	264	char buf[LINE_MAX];
	265	int r;
	266
	267	f = fopen("/etc/smack/onlycap", "re");
	268	if (!f) {
	269	if (errno != ENOENT)
	270	log_warning_errno(errno, "Failed to read '/etc/smack/onlycap'");
	271	return errno == ENOENT ? ENOENT : -errno;
	272	}
	273
	274	FOREACH_LINE(buf, f, return -errno) {
	275	size_t l;
	276
	277	if (isempty(truncate_nl(buf)) \|\| strchr(COMMENTS, *buf))
	278	continue;
	279
	280	l = strlen(buf);
	281	if (!GREEDY_REALLOC(list, allocated, len + l + 1))
	282	return log_oom();
	283
	284	stpcpy(list + len, buf)[0] = ' ';
	285	len += l + 1;
	286	}
	287
	288	if (!len)
	289	return 0;
	290
	291	list[len - 1] = 0;
	292
	293	onlycap_fd = open("/sys/fs/smackfs/onlycap", O_WRONLY\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	294	if (onlycap_fd < 0) {
	295	if (errno != ENOENT)
	296	log_warning_errno(errno, "Failed to open '/sys/fs/smackfs/onlycap'");
	297	return -errno; /* negative error */
	298	}
	299
	300	r = write(onlycap_fd, list, len);
	301	if (r < 0)
	302	return log_error_errno(errno, "Failed to write onlycap list(%s) to '/sys/fs/smackfs/onlycap'", list);
	303
	304	return 0;
	305	}
	306
2b3e18de	307	#endif
ffbd2c4d	308
8a188de9	309	int mac_smack_setup(bool *loaded_policy) {
2b3e18de	310
f9fa32f0	311	#if ENABLE_SMACK
2b3e18de	312
a4783bd1 ZJS	313	int r;
a4783bd1 ZJS	314
e49d3c01 ŁS	315	assert(loaded_policy);
e49d3c01 ŁS	316
6656aefb	317	r = write_access2_rules("/etc/smack/accesses.d/");
a4783bd1 ZJS	318	switch(r) {
	319	case -ENOENT:
	320	log_debug("Smack is not enabled in the kernel.");
	321	return 0;
	322	case ENOENT:
6656aefb	323	log_debug("Smack access rules directory '/etc/smack/accesses.d/' not found");
a4783bd1 ZJS	324	return 0;
	325	case 0:
	326	log_info("Successfully loaded Smack policies.");
abbacb1d NC	327	break;
abbacb1d NC	328	default:
e53fc357	329	log_warning_errno(r, "Failed to load Smack access rules, ignoring: %m");
abbacb1d NC	330	return 0;
	331	}
	332
8b197c3a	333	#ifdef SMACK_RUN_LABEL
4c1fc3e4	334	r = write_string_file("/proc/self/attr/current", SMACK_RUN_LABEL, 0);
ae176752 CS	335	if (r < 0)
	336	log_warning_errno(r, "Failed to set SMACK label \"" SMACK_RUN_LABEL "\" on self: %m");
	337	r = write_string_file("/sys/fs/smackfs/ambient", SMACK_RUN_LABEL, 0);
	338	if (r < 0)
	339	log_warning_errno(r, "Failed to set SMACK ambient label \"" SMACK_RUN_LABEL "\": %m");
	340	r = write_string_file("/sys/fs/smackfs/netlabel",
	341	"0.0.0.0/0 " SMACK_RUN_LABEL, 0);
	342	if (r < 0)
	343	log_warning_errno(r, "Failed to set SMACK netlabel rule \"0.0.0.0/0 " SMACK_RUN_LABEL "\": %m");
	344	r = write_string_file("/sys/fs/smackfs/netlabel", "127.0.0.1 -CIPSO", 0);
	345	if (r < 0)
	346	log_warning_errno(r, "Failed to set SMACK netlabel rule \"127.0.0.1 -CIPSO\": %m");
8b197c3a AK	347	#endif
8b197c3a AK	348
6656aefb	349	r = write_cipso2_rules("/etc/smack/cipso.d/");
abbacb1d NC	350	switch(r) {
	351	case -ENOENT:
	352	log_debug("Smack/CIPSO is not enabled in the kernel.");
	353	return 0;
	354	case ENOENT:
6656aefb	355	log_debug("Smack/CIPSO access rules directory '/etc/smack/cipso.d/' not found");
ae176752	356	break;
abbacb1d NC	357	case 0:
abbacb1d NC	358	log_info("Successfully loaded Smack/CIPSO policies.");
b9289d4c	359	break;
a4783bd1	360	default:
e53fc357	361	log_warning_errno(r, "Failed to load Smack/CIPSO access rules, ignoring: %m");
ae176752 CS	362	break;
	363	}
	364
	365	r = write_netlabel_rules("/etc/smack/netlabel.d/");
	366	switch(r) {
	367	case -ENOENT:
	368	log_debug("Smack/CIPSO is not enabled in the kernel.");
a4783bd1	369	return 0;
ae176752 CS	370	case ENOENT:
	371	log_debug("Smack network host rules directory '/etc/smack/netlabel.d/' not found");
	372	break;
	373	case 0:
	374	log_info("Successfully loaded Smack network host rules.");
	375	break;
	376	default:
	377	log_warning_errno(r, "Failed to load Smack network host rules: %m, ignoring.");
	378	break;
a4783bd1	379	}
2b3e18de	380
217f95db WC	381	r = write_onlycap_list();
	382	switch(r) {
	383	case -ENOENT:
	384	log_debug("Smack is not enabled in the kernel.");
	385	break;
	386	case ENOENT:
	387	log_debug("Smack onlycap list file '/etc/smack/onlycap' not found");
	388	break;
	389	case 0:
	390	log_info("Successfully wrote Smack onlycap list.");
	391	break;
	392	default:
	393	log_emergency_errno(r, "Failed to write Smack onlycap list.");
	394	return r;
	395	}
	396
e49d3c01 ŁS	397	*loaded_policy = true;
e49d3c01 ŁS	398
2b3e18de KL	399	#endif
	400
	401	return 0;
ffbd2c4d	402	}