15263807472

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <stdlib.h>

#include "alloc-util.h"
#include "chase.h"
#include "dirent-util.h"
#include "env-file.h"
#include "errno-util.h"
#include "fd-util.h"
#include "fs-util.h"
#include "glyph-util.h"
#include "log.h"
#include "os-util.h"
#include "path-util.h"
#include "stat-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "time-util.h"
#include "utf8.h"
#include "xattr-util.h"

static const char* const image_class_table[_IMAGE_CLASS_MAX] = {
        [IMAGE_MACHINE]  = "machine",
        [IMAGE_PORTABLE] = "portable",
        [IMAGE_SYSEXT]   = "sysext",
        [IMAGE_CONFEXT]  = "confext",
};

DEFINE_STRING_TABLE_LOOKUP(image_class, ImageClass);

/* Helper struct for naming simplicity and reusability */
static const struct {
        const char *release_file_directory;
        const char *release_file_path_prefix;
} image_class_release_info[_IMAGE_CLASS_MAX] = {
        [IMAGE_SYSEXT] = {
                .release_file_directory = "/usr/lib/extension-release.d/",
                .release_file_path_prefix = "/usr/lib/extension-release.d/extension-release.",
        },
        [IMAGE_CONFEXT] = {
                .release_file_directory = "/etc/extension-release.d/",
                .release_file_path_prefix = "/etc/extension-release.d/extension-release.",
        }
};

bool image_name_is_valid(const char *s) {
        if (!filename_is_valid(s))
                return false;

        if (string_has_cc(s, NULL))
                return false;

        if (!utf8_is_valid(s))
                return false;

        /* Temporary files for atomically creating new files */
        if (startswith(s, ".#"))
                return false;

        return true;
}

int path_extract_image_name(const char *path, char **ret) {
        _cleanup_free_ char *fn = NULL;
        int r;

        assert(path);
        assert(ret);

        /* Extract last component from path, without any "/" suffixes. */
        r = path_extract_filename(path, &fn);
        if (r < 0)
                return r;
        if (r != O_DIRECTORY) {
                /* Chop off any image suffixes we recognize (unless we already know this must refer to some dir) */
                char *m = ENDSWITH_SET(fn, ".sysext.raw", ".confext.raw", ".raw");
                if (m)
                        *m = 0;
        }

        /* Truncate the version/counting suffixes */
        fn[strcspn(fn, "_+")] = 0;

        if (!image_name_is_valid(fn))
                return -EINVAL;

        *ret = TAKE_PTR(fn);
        return 0;
}

int path_is_extension_tree(ImageClass image_class, const char *path, const char *extension, bool relax_extension_release_check) {
        int r;

        assert(path);

        /* Does the path exist at all? If not, generate an error immediately. This is useful so that a missing root dir
         * always results in -ENOENT, and we can properly distinguish the case where the whole root doesn't exist from
         * the case where just the os-release file is missing. */
        r = access_nofollow(path, F_OK);
        if (r < 0)
                return r;

        /* We use /usr/lib/extension-release.d/extension-release[.NAME] as flag for something being a system extension,
         * /etc/extension-release.d/extension-release[.NAME] as flag for something being a system configuration, and finally,
         * and {/etc|/usr/lib}/os-release as a flag for something being an OS (when not an extension). */
        r = open_extension_release(path, image_class, extension, relax_extension_release_check, NULL, NULL);
        if (r == -ENOENT) /* We got nothing */
                return 0;
        if (r < 0)
                return r;

        return 1;
}

static int extension_release_strict_xattr_value(int extension_release_fd, const char *extension_release_dir_path, const char *filename) {
        int r;

        assert(extension_release_fd >= 0);
        assert(extension_release_dir_path);
        assert(filename);

        /* No xattr or cannot parse it? Then skip this. */
        r = getxattr_at_bool(extension_release_fd, /* path= */ NULL, "user.extension-release.strict", /* at_flags= */ 0);
        if (ERRNO_IS_NEG_XATTR_ABSENT(r))
                return log_debug_errno(r, "%s/%s does not have user.extension-release.strict xattr, ignoring.",
                                       extension_release_dir_path, filename);
        if (r < 0)
                return log_debug_errno(r, "%s/%s: Failed to read 'user.extension-release.strict' extended attribute from file, ignoring: %m",
                                       extension_release_dir_path, filename);

        /* Explicitly set to request strict matching? Skip it. */
        if (r > 0) {
                log_debug("%s/%s: 'user.extension-release.strict' attribute is true, ignoring file.",
                          extension_release_dir_path, filename);
                return true;
        }

        log_debug("%s/%s: 'user.extension-release.strict' attribute is false%s",
                  extension_release_dir_path, filename,
                  glyph(GLYPH_ELLIPSIS));

        return false;
}

int open_os_release_at(int rfd, char **ret_path, int *ret_fd) {
        const char *e;
        int r;

        assert(rfd >= 0 || rfd == AT_FDCWD);

        e = secure_getenv("SYSTEMD_OS_RELEASE");
        if (e)
                return chaseat(rfd, e, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);

        FOREACH_STRING(path, "/etc/os-release", "/usr/lib/os-release") {
                r = chaseat(rfd, path, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);
                if (r != -ENOENT)
                        return r;
        }

        return -ENOENT;
}

int open_os_release(const char *root, char **ret_path, int *ret_fd) {
        _cleanup_close_ int rfd = -EBADF, fd = -EBADF;
        _cleanup_free_ char *p = NULL;
        int r;

        rfd = open(empty_to_root(root), O_CLOEXEC | O_DIRECTORY | O_PATH);
        if (rfd < 0)
                return -errno;

        r = open_os_release_at(rfd, ret_path ? &p : NULL, ret_fd ? &fd : NULL);
        if (r < 0)
                return r;

        if (ret_path) {
                r = chaseat_prefix_root(p, root, ret_path);
                if (r < 0)
                        return r;
        }

        if (ret_fd)
                *ret_fd = TAKE_FD(fd);

        return 0;
}

int open_extension_release_at(
                int rfd,
                ImageClass image_class,
                const char *extension,
                bool relax_extension_release_check,
                char **ret_path,
                int *ret_fd) {

        _cleanup_free_ char *dir_path = NULL, *path_found = NULL;
        _cleanup_close_ int fd_found = -EBADF;
        _cleanup_closedir_ DIR *dir = NULL;
        bool found = false;
        const char *p;
        int r;

        assert(rfd >= 0 || rfd == AT_FDCWD);
        assert(!extension || (image_class >= 0 && image_class < _IMAGE_CLASS_MAX));

        if (!extension)
                return open_os_release_at(rfd, ret_path, ret_fd);

        if (!IN_SET(image_class, IMAGE_SYSEXT, IMAGE_CONFEXT))
                return -EINVAL;

        if (!image_name_is_valid(extension))
                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "The extension name %s is invalid.", extension);

        p = strjoina(image_class_release_info[image_class].release_file_path_prefix, extension);
        r = chaseat(rfd, p, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);
        log_full_errno_zerook(LOG_DEBUG, MIN(r, 0), "Checking for %s: %m", p);
        if (r != -ENOENT)
                return r;

        /* Cannot find the expected extension-release file? The image filename might have been mangled on
         * deployment, so fallback to checking for any file in the extension-release.d directory, and return
         * the first one with a user.extension-release xattr instead. The user.extension-release.strict
         * xattr is checked to ensure the author of the image considers it OK if names do not match. */

        p = image_class_release_info[image_class].release_file_directory;
        r = chase_and_opendirat(rfd, p, CHASE_AT_RESOLVE_IN_ROOT, &dir_path, &dir);
        if (r < 0)
                return log_debug_errno(r, "Cannot open %s, ignoring: %m", p);

        FOREACH_DIRENT(de, dir, return -errno) {
                _cleanup_close_ int fd = -EBADF;
                const char *image_name;

                if (!IN_SET(de->d_type, DT_REG, DT_UNKNOWN))
                        continue;

                image_name = startswith(de->d_name, "extension-release.");
                if (!image_name)
                        continue;

                if (!image_name_is_valid(image_name)) {
                        log_debug("%s/%s is not a valid release file name, ignoring.", dir_path, de->d_name);
                        continue;
                }

                /* We already chased the directory, and checked that this is a real file, so we shouldn't
                 * fail to open it. */
                fd = openat(dirfd(dir), de->d_name, O_PATH|O_CLOEXEC|O_NOFOLLOW);
                if (fd < 0)
                        return log_debug_errno(errno, "Failed to open release file %s/%s: %m", dir_path, de->d_name);

                /* Really ensure it is a regular file after we open it. */
                r = fd_verify_regular(fd);
                if (r < 0) {
                        log_debug_errno(r, "%s/%s is not a regular file, ignoring: %m", dir_path, de->d_name);
                        continue;
                }

                if (!relax_extension_release_check) {
                        _cleanup_free_ char *base_extension = NULL;

                        r = path_extract_image_name(extension, &base_extension);
                        if (r < 0) {
                                log_debug_errno(r, "Failed to extract image name from %s, ignoring: %m", extension);
                                continue;
                        }

                        if (!streq(image_name, base_extension) &&
                            extension_release_strict_xattr_value(fd, dir_path, image_name) != 0)
                                continue;
                }

                /* We already found what we were looking for, but there's another candidate? We treat this as
                 * an error, as we want to enforce that there are no ambiguities in case we are in the
                 * fallback path. */
                if (found)
                        return -ENOTUNIQ;

                found = true;

                if (ret_fd)
                        fd_found = TAKE_FD(fd);

                if (ret_path) {
                        path_found = path_join(dir_path, de->d_name);
                        if (!path_found)
                                return -ENOMEM;
                }
        }
        if (!found)
                return -ENOENT;

        if (ret_fd)
                *ret_fd = TAKE_FD(fd_found);
        if (ret_path)
                *ret_path = TAKE_PTR(path_found);

        return 0;
}

int open_extension_release(
                const char *root,
                ImageClass image_class,
                const char *extension,
                bool relax_extension_release_check,
                char **ret_path,
                int *ret_fd) {

        _cleanup_close_ int rfd = -EBADF, fd = -EBADF;
        _cleanup_free_ char *p = NULL;
        int r;

        rfd = open(empty_to_root(root), O_CLOEXEC | O_DIRECTORY | O_PATH);
        if (rfd < 0)
                return -errno;

        r = open_extension_release_at(rfd, image_class, extension, relax_extension_release_check,
                                      ret_path ? &p : NULL, ret_fd ? &fd : NULL);
        if (r < 0)
                return r;

        if (ret_path) {
                r = chaseat_prefix_root(p, root, ret_path);
                if (r < 0)
                        return r;
        }

        if (ret_fd)
                *ret_fd = TAKE_FD(fd);

        return 0;
}

static int parse_extension_release_atv(
                int rfd,
                ImageClass image_class,
                const char *extension,
                bool relax_extension_release_check,
                va_list ap) {

        _cleanup_close_ int fd = -EBADF;
        _cleanup_free_ char *p = NULL;
        int r;

        assert(rfd >= 0 || rfd == AT_FDCWD);

        r = open_extension_release_at(rfd, image_class, extension, relax_extension_release_check, &p, &fd);
        if (r < 0)
                return r;

        return parse_env_file_fdv(fd, p, ap);
}

int parse_extension_release_at_sentinel(
                int rfd,
                ImageClass image_class,
                bool relax_extension_release_check,
                const char *extension,
                ...) {

        va_list ap;
        int r;

        assert(rfd >= 0 || rfd == AT_FDCWD);

        va_start(ap, extension);
        r = parse_extension_release_atv(rfd, image_class, extension, relax_extension_release_check, ap);
        va_end(ap);
        return r;
}

int parse_extension_release_sentinel(
                const char *root,
                ImageClass image_class,
                bool relax_extension_release_check,
                const char *extension,
                ...) {

        _cleanup_close_ int rfd = -EBADF;
        va_list ap;
        int r;

        rfd = open(empty_to_root(root), O_CLOEXEC | O_DIRECTORY | O_PATH);
        if (rfd < 0)
                return -errno;

        va_start(ap, extension);
        r = parse_extension_release_atv(rfd, image_class, extension, relax_extension_release_check, ap);
        va_end(ap);
        return r;
}

int load_os_release_pairs_with_prefix(const char *root, const char *prefix, char ***ret) {
        _cleanup_strv_free_ char **os_release_pairs = NULL, **os_release_pairs_prefixed = NULL;
        int r;

        r = load_os_release_pairs(root, &os_release_pairs);
        if (r < 0)
                return r;

        STRV_FOREACH_PAIR(p, q, os_release_pairs) {
                char *line;

                /* We strictly return only the four main ID fields and ignore the rest */
                if (!STR_IN_SET(*p, "ID", "VERSION_ID", "BUILD_ID", "VARIANT_ID"))
                        continue;

                ascii_strlower(*p);
                line = strjoin(prefix, *p, "=", *q);
                if (!line)
                        return -ENOMEM;
                r = strv_consume(&os_release_pairs_prefixed, line);
                if (r < 0)
                        return r;
        }

        *ret = TAKE_PTR(os_release_pairs_prefixed);

        return 0;
}

int load_extension_release_pairs(const char *root, ImageClass image_class, const char *extension, bool relax_extension_release_check, char ***ret) {
        _cleanup_close_ int fd = -EBADF;
        _cleanup_free_ char *p = NULL;
        int r;

        r = open_extension_release(root, image_class, extension, relax_extension_release_check, &p, &fd);
        if (r < 0)
                return r;

        return load_env_file_pairs_fd(fd, p, ret);
}

int os_release_support_ended(const char *support_end, bool quiet, usec_t *ret_eol) {
        _cleanup_free_ char *_support_end_alloc = NULL;
        int r;

        if (!support_end) {
                /* If the caller has the variably handy, they can pass it in. If not, we'll read it
                 * ourselves. */

                r = parse_os_release(NULL,
                                     "SUPPORT_END", &_support_end_alloc);
                if (r < 0 && r != -ENOENT)
                        return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, r,
                                              "Failed to read os-release file, ignoring: %m");

                support_end = _support_end_alloc;
        }

        if (isempty(support_end)) { /* An empty string is a explicit way to say "no EOL exists" */
                if (ret_eol)
                        *ret_eol = USEC_INFINITY;

                return false;  /* no end date defined */
        }

        struct tm tm = {};
        const char *k = strptime(support_end, "%Y-%m-%d", &tm);
        if (!k || *k)
                return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, SYNTHETIC_ERRNO(EINVAL),
                                      "Failed to parse SUPPORT_END= from os-release file, ignoring: %s", support_end);

        usec_t eol;
        r = mktime_or_timegm_usec(&tm, /* utc= */ true, &eol);
        if (r < 0)
                return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, r,
                                      "Failed to convert SUPPORT_END= time from os-release file, ignoring: %m");

        if (ret_eol)
                *ret_eol = eol;

        return now(CLOCK_REALTIME) > eol;
}

const char* os_release_pretty_name(const char *pretty_name, const char *name) {
        /* Distills a "pretty" name to show from os-release data. First argument is supposed to be the
         * PRETTY_NAME= field, the second one the NAME= field. This function is trivial, of course, and
         * exists mostly to ensure we use the same logic wherever possible. */

        return empty_to_null(pretty_name) ?:
                empty_to_null(name) ?: "Linux";
}

1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3	#include <stdlib.h>
4
5	#include "alloc-util.h"
6	#include "chase.h"
7	#include "dirent-util.h"
8	#include "env-file.h"
9	#include "errno-util.h"
10	#include "fd-util.h"
11	#include "fs-util.h"
12	#include "glyph-util.h"
13	#include "log.h"
14	#include "os-util.h"
15	#include "path-util.h"
16	#include "stat-util.h"
17	#include "string-table.h"
18	#include "string-util.h"
19	#include "strv.h"
20	#include "time-util.h"
21	#include "utf8.h"
22	#include "xattr-util.h"
23
24	static const char* const image_class_table[_IMAGE_CLASS_MAX] = {
25	[IMAGE_MACHINE] = "machine",
26	[IMAGE_PORTABLE] = "portable",
27	[IMAGE_SYSEXT] = "sysext",
28	[IMAGE_CONFEXT] = "confext",
29	};
30
31	DEFINE_STRING_TABLE_LOOKUP(image_class, ImageClass);	212✔
32
33	/* Helper struct for naming simplicity and reusability */
34	static const struct {
35	const char *release_file_directory;
36	const char *release_file_path_prefix;
37	} image_class_release_info[_IMAGE_CLASS_MAX] = {
38	[IMAGE_SYSEXT] = {
39	.release_file_directory = "/usr/lib/extension-release.d/",
40	.release_file_path_prefix = "/usr/lib/extension-release.d/extension-release.",
41	},
42	[IMAGE_CONFEXT] = {
43	.release_file_directory = "/etc/extension-release.d/",
44	.release_file_path_prefix = "/etc/extension-release.d/extension-release.",
45	}
46	};
47
48	bool image_name_is_valid(const char *s) {	24,611✔
49	if (!filename_is_valid(s))	24,611✔
50	return false;
51
52	if (string_has_cc(s, NULL))	19,426✔
53	return false;
54
55	if (!utf8_is_valid(s))	19,426✔
56	return false;
57
58	/* Temporary files for atomically creating new files */
59	if (startswith(s, ".#"))	19,426✔
60	return false;	1✔
61
62	return true;
63	}
64
65	int path_extract_image_name(const char path, char *ret) {	6,778✔
66	_cleanup_free_ char *fn = NULL;	6,778✔
67	int r;	6,778✔
68
69	assert(path);	6,778✔
70	assert(ret);	6,778✔
71
72	/* Extract last component from path, without any "/" suffixes. */
73	r = path_extract_filename(path, &fn);	6,778✔
74	if (r < 0)	6,778✔
75	return r;
76	if (r != O_DIRECTORY) {	6,778✔
77	/* Chop off any image suffixes we recognize (unless we already know this must refer to some dir) */
78	char *m = ENDSWITH_SET(fn, ".sysext.raw", ".confext.raw", ".raw");	6,778✔
79	if (m)	6,778✔
80	*m = 0;	3,339✔
81	}
82
83	/* Truncate the version/counting suffixes */
84	fn[strcspn(fn, "_+")] = 0;	6,778✔
85
86	if (!image_name_is_valid(fn))	6,778✔
87	return -EINVAL;
88
89	*ret = TAKE_PTR(fn);	6,778✔
90	return 0;	6,778✔
91	}
92
93	int path_is_extension_tree(ImageClass image_class, const char path, const char extension, bool relax_extension_release_check) {	257✔
94	int r;	257✔
95
96	assert(path);	257✔
97
98	/* Does the path exist at all? If not, generate an error immediately. This is useful so that a missing root dir
99	* always results in -ENOENT, and we can properly distinguish the case where the whole root doesn't exist from
100	* the case where just the os-release file is missing. */
101	r = access_nofollow(path, F_OK);	257✔
102	if (r < 0)	257✔
103	return r;
104
105	/* We use /usr/lib/extension-release.d/extension-release[.NAME] as flag for something being a system extension,
106	* /etc/extension-release.d/extension-release[.NAME] as flag for something being a system configuration, and finally,
107	* and {/etc\|/usr/lib}/os-release as a flag for something being an OS (when not an extension). */
108	r = open_extension_release(path, image_class, extension, relax_extension_release_check, NULL, NULL);	256✔
109	if (r == -ENOENT) /* We got nothing */	256✔
110	return 0;
111	if (r < 0)	207✔
UNCOV 112	return r;	×
113
114	return 1;
115	}
116
117	static int extension_release_strict_xattr_value(int extension_release_fd, const char extension_release_dir_path, const char filename) {	579✔
118	int r;	579✔
119
120	assert(extension_release_fd >= 0);	579✔
121	assert(extension_release_dir_path);	579✔
122	assert(filename);	579✔
123
124	/* No xattr or cannot parse it? Then skip this. */
125	r = getxattr_at_bool(extension_release_fd, /* path= / NULL, "user.extension-release.strict", / at_flags= */ 0);	579✔
126	if (ERRNO_IS_NEG_XATTR_ABSENT(r))	579✔
127	return log_debug_errno(r, "%s/%s does not have user.extension-release.strict xattr, ignoring.",	56✔
128	extension_release_dir_path, filename);
129	if (r < 0)	523✔
UNCOV 130	return log_debug_errno(r, "%s/%s: Failed to read 'user.extension-release.strict' extended attribute from file, ignoring: %m",	×
131	extension_release_dir_path, filename);
132
133	/* Explicitly set to request strict matching? Skip it. */
134	if (r > 0) {	523✔
UNCOV 135	log_debug("%s/%s: 'user.extension-release.strict' attribute is true, ignoring file.",	×
136	extension_release_dir_path, filename);
UNCOV 137	return true;	×
138	}
139
140	log_debug("%s/%s: 'user.extension-release.strict' attribute is false%s",	1,046✔
141	extension_release_dir_path, filename,
142	glyph(GLYPH_ELLIPSIS));
143
144	return false;
145	}
146
147	int open_os_release_at(int rfd, char *ret_path, int ret_fd) {	2,155✔
148	const char *e;	2,155✔
149	int r;	2,155✔
150
151	assert(rfd >= 0 \|\| rfd == AT_FDCWD);	2,155✔
152
153	e = secure_getenv("SYSTEMD_OS_RELEASE");	2,155✔
154	if (e)	2,155✔
155	return chaseat(rfd, e, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);	12✔
156
157	FOREACH_STRING(path, "/etc/os-release", "/usr/lib/os-release") {	2,635✔
158	r = chaseat(rfd, path, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);	2,433✔
159	if (r != -ENOENT)	2,433✔
160	return r;	1,941✔
161	}
162
163	return -ENOENT;	202✔
164	}
165
166	int open_os_release(const char root, char ret_path, int ret_fd) {	1,240✔
167	_cleanup_close_ int rfd = -EBADF, fd = -EBADF;	1,240✔
168	_cleanup_free_ char *p = NULL;	1,240✔
169	int r;	1,240✔
170
171	rfd = open(empty_to_root(root), O_CLOEXEC \| O_DIRECTORY \| O_PATH);	1,240✔
172	if (rfd < 0)	1,240✔
UNCOV 173	return -errno;	×
174
175	r = open_os_release_at(rfd, ret_path ? &p : NULL, ret_fd ? &fd : NULL);	1,273✔
176	if (r < 0)	1,240✔
177	return r;
178
179	if (ret_path) {	1,236✔
180	r = chaseat_prefix_root(p, root, ret_path);	1,207✔
181	if (r < 0)	1,207✔
182	return r;
183	}
184
185	if (ret_fd)	1,236✔
186	*ret_fd = TAKE_FD(fd);	1,236✔
187
188	return 0;
189	}
190
191	int open_extension_release_at(	2,636✔
192	int rfd,
193	ImageClass image_class,
194	const char *extension,
195	bool relax_extension_release_check,
196	char **ret_path,
197	int *ret_fd) {
198
199	_cleanup_free_ char dir_path = NULL, path_found = NULL;	2,636✔
200	_cleanup_close_ int fd_found = -EBADF;	2,636✔
201	_cleanup_closedir_ DIR *dir = NULL;	2,636✔
202	bool found = false;	2,636✔
203	const char *p;	2,636✔
204	int r;	2,636✔
205
206	assert(rfd >= 0 \|\| rfd == AT_FDCWD);	2,636✔
207	assert(!extension \|\| (image_class >= 0 && image_class < _IMAGE_CLASS_MAX));	2,636✔
208
209	if (!extension)	2,636✔
210	return open_os_release_at(rfd, ret_path, ret_fd);	915✔
211
212	if (!IN_SET(image_class, IMAGE_SYSEXT, IMAGE_CONFEXT))	1,721✔
213	return -EINVAL;
214
215	if (!image_name_is_valid(extension))	1,721✔
UNCOV 216	return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "The extension name %s is invalid.", extension);	×
217
218	p = strjoina(image_class_release_info[image_class].release_file_path_prefix, extension);	8,605✔
219	r = chaseat(rfd, p, CHASE_AT_RESOLVE_IN_ROOT, ret_path, ret_fd);	1,721✔
220	log_full_errno_zerook(LOG_DEBUG, MIN(r, 0), "Checking for %s: %m", p);	1,721✔
221	if (r != -ENOENT)	1,721✔
222	return r;
223
224	/* Cannot find the expected extension-release file? The image filename might have been mangled on
225	* deployment, so fallback to checking for any file in the extension-release.d directory, and return
226	* the first one with a user.extension-release xattr instead. The user.extension-release.strict
227	* xattr is checked to ensure the author of the image considers it OK if names do not match. */
228
229	p = image_class_release_info[image_class].release_file_directory;	857✔
230	r = chase_and_opendirat(rfd, p, CHASE_AT_RESOLVE_IN_ROOT, &dir_path, &dir);	857✔
231	if (r < 0)	857✔
232	return log_debug_errno(r, "Cannot open %s, ignoring: %m", p);	324✔
233
234	FOREACH_DIRENT(de, dir, return -errno) {	2,188✔
235	_cleanup_close_ int fd = -EBADF;	4,291✔
236	const char *image_name;	589✔
237
238	if (!IN_SET(de->d_type, DT_REG, DT_UNKNOWN))	589✔
UNCOV 239	continue;	×
240
241	image_name = startswith(de->d_name, "extension-release.");	589✔
242	if (!image_name)	589✔
UNCOV 243	continue;	×
244
245	if (!image_name_is_valid(image_name)) {	589✔
UNCOV 246	log_debug("%s/%s is not a valid release file name, ignoring.", dir_path, de->d_name);	×
247	continue;	×
248	}
249
250	/* We already chased the directory, and checked that this is a real file, so we shouldn't
251	* fail to open it. */
252	fd = openat(dirfd(dir), de->d_name, O_PATH\|O_CLOEXEC\|O_NOFOLLOW);	589✔
253	if (fd < 0)	589✔
UNCOV 254	return log_debug_errno(errno, "Failed to open release file %s/%s: %m", dir_path, de->d_name);	×
255
256	/* Really ensure it is a regular file after we open it. */
257	r = fd_verify_regular(fd);	589✔
258	if (r < 0) {	589✔
UNCOV 259	log_debug_errno(r, "%s/%s is not a regular file, ignoring: %m", dir_path, de->d_name);	×
260	continue;	×
261	}
262
263	if (!relax_extension_release_check) {	589✔
264	_cleanup_free_ char *base_extension = NULL;	583✔
265
266	r = path_extract_image_name(extension, &base_extension);	583✔
267	if (r < 0) {	583✔
UNCOV 268	log_debug_errno(r, "Failed to extract image name from %s, ignoring: %m", extension);	×
269	continue;	×
270	}
271
272	if (!streq(image_name, base_extension) &&	1,162✔
273	extension_release_strict_xattr_value(fd, dir_path, image_name) != 0)	579✔
274	continue;	56✔
275	}
276
277	/* We already found what we were looking for, but there's another candidate? We treat this as
278	* an error, as we want to enforce that there are no ambiguities in case we are in the
279	* fallback path. */
280	if (found)	533✔
281	return -ENOTUNIQ;
282
283	found = true;	533✔
284
285	if (ret_fd)	533✔
286	fd_found = TAKE_FD(fd);	520✔
287
288	if (ret_path) {	533✔
289	path_found = path_join(dir_path, de->d_name);	519✔
290	if (!path_found)	519✔
291	return -ENOMEM;
292	}
293	}
294	if (!found)	533✔
295	return -ENOENT;
296
297	if (ret_fd)	533✔
298	*ret_fd = TAKE_FD(fd_found);	520✔
299	if (ret_path)	533✔
300	*ret_path = TAKE_PTR(path_found);	519✔
301
302	return 0;
303	}
304
305	int open_extension_release(	2,336✔
306	const char *root,
307	ImageClass image_class,
308	const char *extension,
309	bool relax_extension_release_check,
310	char **ret_path,
311	int *ret_fd) {
312
313	_cleanup_close_ int rfd = -EBADF, fd = -EBADF;	2,336✔
314	_cleanup_free_ char *p = NULL;	2,336✔
315	int r;	2,336✔
316
317	rfd = open(empty_to_root(root), O_CLOEXEC \| O_DIRECTORY \| O_PATH);	2,336✔
318	if (rfd < 0)	2,336✔
UNCOV 319	return -errno;	×
320
321	r = open_extension_release_at(rfd, image_class, extension, relax_extension_release_check,	2,936✔
322	ret_path ? &p : NULL, ret_fd ? &fd : NULL);
323	if (r < 0)	2,336✔
324	return r;
325
326	if (ret_path) {	1,820✔
327	r = chaseat_prefix_root(p, root, ret_path);	1,594✔
328	if (r < 0)	1,594✔
329	return r;
330	}
331
332	if (ret_fd)	1,820✔
333	*ret_fd = TAKE_FD(fd);	1,613✔
334
335	return 0;
336	}
337
338	static int parse_extension_release_atv(	300✔
339	int rfd,
340	ImageClass image_class,
341	const char *extension,
342	bool relax_extension_release_check,
343	va_list ap) {
344
345	_cleanup_close_ int fd = -EBADF;	300✔
346	_cleanup_free_ char *p = NULL;	300✔
347	int r;	300✔
348
349	assert(rfd >= 0 \|\| rfd == AT_FDCWD);	300✔
350
351	r = open_extension_release_at(rfd, image_class, extension, relax_extension_release_check, &p, &fd);	300✔
352	if (r < 0)	300✔
353	return r;
354
355	return parse_env_file_fdv(fd, p, ap);	293✔
356	}
357
358	int parse_extension_release_at_sentinel(	6✔
359	int rfd,
360	ImageClass image_class,
361	bool relax_extension_release_check,
362	const char *extension,
363	...) {
364
365	va_list ap;	6✔
366	int r;	6✔
367
368	assert(rfd >= 0 \|\| rfd == AT_FDCWD);	6✔
369
370	va_start(ap, extension);	6✔
371	r = parse_extension_release_atv(rfd, image_class, extension, relax_extension_release_check, ap);	6✔
372	va_end(ap);	6✔
373	return r;	6✔
374	}
375
376	int parse_extension_release_sentinel(	294✔
377	const char *root,
378	ImageClass image_class,
379	bool relax_extension_release_check,
380	const char *extension,
381	...) {
382
383	_cleanup_close_ int rfd = -EBADF;	294✔
384	va_list ap;	294✔
385	int r;	294✔
386
387	rfd = open(empty_to_root(root), O_CLOEXEC \| O_DIRECTORY \| O_PATH);	294✔
388	if (rfd < 0)	294✔
UNCOV 389	return -errno;	×
390
391	va_start(ap, extension);	294✔
392	r = parse_extension_release_atv(rfd, image_class, extension, relax_extension_release_check, ap);	294✔
393	va_end(ap);	294✔
394	return r;	294✔
395	}
396
397	int load_os_release_pairs_with_prefix(const char root, const char prefix, char ***ret) {	222✔
398	_cleanup_strv_free_ char os_release_pairs = NULL, os_release_pairs_prefixed = NULL;	222✔
399	int r;	222✔
400
401	r = load_os_release_pairs(root, &os_release_pairs);	222✔
402	if (r < 0)	222✔
403	return r;
404
405	STRV_FOREACH_PAIR(p, q, os_release_pairs) {	2,664✔
406	char *line;	2,442✔
407
408	/* We strictly return only the four main ID fields and ignore the rest */
409	if (!STR_IN_SET(*p, "ID", "VERSION_ID", "BUILD_ID", "VARIANT_ID"))	2,442✔
410	continue;	1,998✔
411
412	ascii_strlower(*p);	444✔
413	line = strjoin(prefix, p, "=", q);	444✔
414	if (!line)	444✔
415	return -ENOMEM;
416	r = strv_consume(&os_release_pairs_prefixed, line);	444✔
417	if (r < 0)	444✔
418	return r;
419	}
420
421	*ret = TAKE_PTR(os_release_pairs_prefixed);	222✔
422
423	return 0;	222✔
424	}
425
426	int load_extension_release_pairs(const char root, ImageClass image_class, const char extension, bool relax_extension_release_check, char ***ret) {	1,013✔
427	_cleanup_close_ int fd = -EBADF;	1,013✔
428	_cleanup_free_ char *p = NULL;	1,013✔
429	int r;	1,013✔
430
431	r = open_extension_release(root, image_class, extension, relax_extension_release_check, &p, &fd);	1,013✔
432	if (r < 0)	1,013✔
433	return r;
434
435	return load_env_file_pairs_fd(fd, p, ret);	618✔
436	}
437
438	int os_release_support_ended(const char support_end, bool quiet, usec_t ret_eol) {	53✔
439	_cleanup_free_ char *_support_end_alloc = NULL;	53✔
440	int r;	53✔
441
442	if (!support_end) {	53✔
443	/* If the caller has the variably handy, they can pass it in. If not, we'll read it
444	* ourselves. */
445
446	r = parse_os_release(NULL,	50✔
447	"SUPPORT_END", &_support_end_alloc);
448	if (r < 0 && r != -ENOENT)	50✔
UNCOV 449	return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, r,	×
450	"Failed to read os-release file, ignoring: %m");
451
452	support_end = _support_end_alloc;	50✔
453	}
454
455	if (isempty(support_end)) { /* An empty string is a explicit way to say "no EOL exists" */	53✔
456	if (ret_eol)	50✔
UNCOV 457	*ret_eol = USEC_INFINITY;	×
458
459	return false; /* no end date defined */	50✔
460	}
461
462	struct tm tm = {};	3✔
463	const char *k = strptime(support_end, "%Y-%m-%d", &tm);	3✔
464	if (!k \|\| *k)	3✔
465	return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, SYNTHETIC_ERRNO(EINVAL),	1✔
466	"Failed to parse SUPPORT_END= from os-release file, ignoring: %s", support_end);
467
468	usec_t eol;	2✔
469	r = mktime_or_timegm_usec(&tm, /* utc= */ true, &eol);	2✔
470	if (r < 0)	2✔
UNCOV 471	return log_full_errno(quiet ? LOG_DEBUG : LOG_WARNING, r,	×
472	"Failed to convert SUPPORT_END= time from os-release file, ignoring: %m");
473
474	if (ret_eol)	2✔
UNCOV 475	*ret_eol = eol;	×
476
477	return now(CLOCK_REALTIME) > eol;	2✔
478	}
479
480	const char* os_release_pretty_name(const char pretty_name, const char name) {	48✔
481	/* Distills a "pretty" name to show from os-release data. First argument is supposed to be the
482	* PRETTY_NAME= field, the second one the NAME= field. This function is trivial, of course, and
483	* exists mostly to ensure we use the same logic wherever possible. */
484
485	return empty_to_null(pretty_name) ?:	48✔
486	empty_to_null(name) ?: "Linux";	6✔
487	}

systemd / systemd / 15263807472

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