15263807472

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

#include <stdlib.h>
#include <unistd.h>

#include "alloc-util.h"
#include "errno-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "log.h"
#include "path-util.h"
#include "random-util.h"
#include "string-util.h"
#include "sync-util.h"
#include "tmpfile-util.h"
#include "umask-util.h"

static int fopen_temporary_internal(int dir_fd, const char *path, FILE **ret_file) {
        _cleanup_fclose_ FILE *f = NULL;
        _cleanup_close_ int fd = -EBADF;
        int r;

        assert(dir_fd >= 0 || dir_fd == AT_FDCWD);
        assert(path);

        fd = openat(dir_fd, path, O_CLOEXEC|O_NOCTTY|O_RDWR|O_CREAT|O_EXCL, 0600);
        if (fd < 0)
                return -errno;

        /* This assumes that returned FILE object is short-lived and used within the same single-threaded
         * context and never shared externally, hence locking is not necessary. */

        r = take_fdopen_unlocked(&fd, "w", &f);
        if (r < 0) {
                (void) unlinkat(dir_fd, path, 0);
                return r;
        }

        if (ret_file)
                *ret_file = TAKE_PTR(f);

        return 0;
}

int fopen_temporary_at(int dir_fd, const char *path, FILE **ret_file, char **ret_path) {
        _cleanup_free_ char *t = NULL;
        int r;

        assert(dir_fd >= 0 || dir_fd == AT_FDCWD);
        assert(path);

        r = tempfn_random(path, NULL, &t);
        if (r < 0)
                return r;

        r = fopen_temporary_internal(dir_fd, t, ret_file);
        if (r < 0)
                return r;

        if (ret_path)
                *ret_path = TAKE_PTR(t);

        return 0;
}

int fopen_temporary_child_at(int dir_fd, const char *path, FILE **ret_file, char **ret_path) {
        _cleanup_free_ char *t = NULL;
        int r;

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

        if (!path) {
                r = tmp_dir(&path);
                if (r < 0)
                        return r;
        }

        r = tempfn_random_child(path, NULL, &t);
        if (r < 0)
                return r;

        r = fopen_temporary_internal(dir_fd, t, ret_file);
        if (r < 0)
                return r;

        if (ret_path)
                *ret_path = TAKE_PTR(t);

        return 0;
}

/* This is much like mkostemp() but is subject to umask(). */
int mkostemp_safe(char *pattern) {
        assert(pattern);
        BLOCK_WITH_UMASK(0077);
        return RET_NERRNO(mkostemp(pattern, O_CLOEXEC));
}

int fmkostemp_safe(char *pattern, const char *mode, FILE **ret_f) {
        _cleanup_close_ int fd = -EBADF;
        FILE *f;

        fd = mkostemp_safe(pattern);
        if (fd < 0)
                return fd;

        f = take_fdopen(&fd, mode);
        if (!f)
                return -errno;

        *ret_f = f;
        return 0;
}

void unlink_tempfilep(char (*p)[]) {
        assert(p);

        /* If the file is created with mkstemp(), it will (almost always) change the suffix.
         * Treat this as a sign that the file was successfully created. We ignore both the rare case
         * where the original suffix is used and unlink failures. */

        if (!endswith(*p, ".XXXXXX"))
                (void) unlink(*p);
}

static int tempfn_build(const char *p, const char *pre, const char *post, bool child, char **ret) {
        _cleanup_free_ char *d = NULL, *fn = NULL, *nf = NULL, *result = NULL;
        size_t len_pre, len_post, len_add;
        int r;

        assert(p);
        assert(ret);

        /*
         * Turns this:
         *         /foo/bar/waldo
         *
         * Into this :
         *         /foo/bar/waldo/.#<pre><post> (child == true)
         *         /foo/bar/.#<pre>waldo<post> (child == false)
         */

        if (pre && strchr(pre, '/'))
                return -EINVAL;

        if (post && strchr(post, '/'))
                return -EINVAL;

        len_pre = strlen_ptr(pre);
        len_post = strlen_ptr(post);
        /* NAME_MAX is counted *without* the trailing NUL byte. */
        if (len_pre > NAME_MAX - STRLEN(".#") ||
            len_post > NAME_MAX - STRLEN(".#") - len_pre)
                return -EINVAL;

        len_add = len_pre + len_post + STRLEN(".#");

        if (child) {
                d = strdup(p);
                if (!d)
                        return -ENOMEM;
        } else {
                r = path_extract_directory(p, &d);
                if (r < 0 && r != -EDESTADDRREQ) /* EDESTADDRREQ → No directory specified, just a filename */
                        return r;

                r = path_extract_filename(p, &fn);
                if (r < 0)
                        return r;

                if (strlen(fn) > NAME_MAX - len_add)
                        /* We cannot simply prepend and append strings to the filename. Let's truncate the filename. */
                        fn[NAME_MAX - len_add] = '\0';
        }

        nf = strjoin(".#", strempty(pre), strempty(fn), strempty(post));
        if (!nf)
                return -ENOMEM;

        if (d) {
                if (!path_extend(&d, nf))
                        return -ENOMEM;

                result = path_simplify(TAKE_PTR(d));
        } else
                result = TAKE_PTR(nf);

        if (!path_is_valid(result)) /* New path is not valid? (Maybe because too long?) Refuse. */
                return -EINVAL;

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

int tempfn_xxxxxx(const char *p, const char *extra, char **ret) {
        /*
         * Turns this:
         *         /foo/bar/waldo
         *
         * Into this:
         *         /foo/bar/.#<extra>waldoXXXXXX
         */

        return tempfn_build(p, extra, "XXXXXX", /* child = */ false, ret);
}

int tempfn_random(const char *p, const char *extra, char **ret) {
        _cleanup_free_ char *s = NULL;

        assert(p);
        assert(ret);

        /*
         * Turns this:
         *         /foo/bar/waldo
         *
         * Into this:
         *         /foo/bar/.#<extra>waldobaa2a261115984a9
         */

        if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)
                return -ENOMEM;

        return tempfn_build(p, extra, s, /* child = */ false, ret);
}

int tempfn_random_child(const char *p, const char *extra, char **ret) {
        _cleanup_free_ char *s = NULL;
        int r;

        assert(ret);

        /* Turns this:
         *         /foo/bar/waldo
         * Into this:
         *         /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
         */

        if (!p) {
                r = tmp_dir(&p);
                if (r < 0)
                        return r;
        }

        if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)
                return -ENOMEM;

        return tempfn_build(p, extra, s, /* child = */ true, ret);
}

int open_tmpfile_unlinkable(const char *directory, int flags) {
        char *p;
        int fd, r;

        if (!directory) {
                r = tmp_dir(&directory);
                if (r < 0)
                        return r;
        } else if (isempty(directory))
                return -EINVAL;

        /* Returns an unlinked temporary file that cannot be linked into the file system anymore */

        /* Try O_TMPFILE first, if it is supported */
        fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR);
        if (fd >= 0)
                return fd;

        /* Fall back to unguessable name + unlinking */
        p = strjoina(directory, "/systemd-tmp-XXXXXX");

        fd = mkostemp_safe(p);
        if (fd < 0)
                return fd;

        (void) unlink(p);

        return fd;
}

int open_tmpfile_linkable_at(int dir_fd, const char *target, int flags, char **ret_path) {
        _cleanup_free_ char *tmp = NULL;
        int r, fd;

        assert(target);
        assert(ret_path);

        /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */
        assert((flags & O_EXCL) == 0);

        /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in
         * which case "ret_path" will be returned as NULL. If not possible the temporary path name used is returned in
         * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */

        fd = open_parent_at(dir_fd, target, O_TMPFILE|flags, 0640);
        if (fd >= 0) {
                *ret_path = NULL;
                return fd;
        }

        log_debug_errno(fd, "Failed to use O_TMPFILE for %s: %m", target);

        r = tempfn_random(target, NULL, &tmp);
        if (r < 0)
                return r;

        fd = openat(dir_fd, tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640);
        if (fd < 0)
                return -errno;

        *ret_path = TAKE_PTR(tmp);

        return fd;
}

int fopen_tmpfile_linkable_at(int dir_fd, const char *target, int flags, char **ret_path, FILE **ret_file) {
        _cleanup_free_ char *path = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        _cleanup_close_ int fd = -EBADF;

        assert(target);
        assert(ret_file);
        assert(ret_path);

        fd = open_tmpfile_linkable_at(dir_fd, target, flags, &path);
        if (fd < 0)
                return fd;

        f = take_fdopen(&fd, "w");
        if (!f)
                return -ENOMEM;

        *ret_path = TAKE_PTR(path);
        *ret_file = TAKE_PTR(f);
        return 0;
}

int link_tmpfile_at(int fd, int dir_fd, const char *path, const char *target, LinkTmpfileFlags flags) {
        int r;

        assert(fd >= 0);
        assert(dir_fd >= 0 || dir_fd == AT_FDCWD);
        assert(target);

        /* Moves a temporary file created with open_tmpfile() above into its final place. If "path" is NULL
         * an fd created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE
         * is not supported on the directory, and renameat2() is used instead. */

        if (FLAGS_SET(flags, LINK_TMPFILE_SYNC) && fsync(fd) < 0)
                return -errno;

        if (path) {
                if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))
                        r = RET_NERRNO(renameat(dir_fd, path, dir_fd, target));
                else
                        r = rename_noreplace(dir_fd, path, dir_fd, target);
        } else {
                if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))
                        r = linkat_replace(fd, /* oldpath= */ NULL, dir_fd, target);
                else
                        r = link_fd(fd, dir_fd, target);
        }
        if (r < 0)
                return r;

        if (FLAGS_SET(flags, LINK_TMPFILE_SYNC)) {
                r = fsync_full(fd);
                if (r < 0)
                        return r;
        }

        return 0;
}

int flink_tmpfile_at(FILE *f, int dir_fd, const char *path, const char *target, LinkTmpfileFlags flags) {
        int fd, r;

        assert(f);
        assert(target);

        fd = fileno(f);
        if (fd < 0) /* Not all FILE* objects encapsulate fds */
                return -EBADF;

        r = fflush_and_check(f);
        if (r < 0)
                return r;

        return link_tmpfile_at(fd, dir_fd, path, target, flags);
}

int mkdtemp_malloc(const char *template, char **ret) {
        _cleanup_free_ char *p = NULL;
        int r;

        assert(ret);

        if (template)
                p = strdup(template);
        else {
                const char *tmp;

                r = tmp_dir(&tmp);
                if (r < 0)
                        return r;

                p = path_join(tmp, "XXXXXX");
        }
        if (!p)
                return -ENOMEM;

        if (!mkdtemp(p))
                return -errno;

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

int mkdtemp_open(const char *template, int flags, char **ret) {
        _cleanup_free_ char *p = NULL;
        int fd, r;

        r = mkdtemp_malloc(template, &p);
        if (r < 0)
                return r;

        fd = RET_NERRNO(open(p, O_DIRECTORY|O_CLOEXEC|flags));
        if (fd < 0) {
                (void) rmdir(p);
                return fd;
        }

        if (ret)
                *ret = TAKE_PTR(p);

        return fd;
}

1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3	#include <stdlib.h>
4	#include <unistd.h>
5
6	#include "alloc-util.h"
7	#include "errno-util.h"
8	#include "fd-util.h"
9	#include "fileio.h"
10	#include "fs-util.h"
11	#include "log.h"
12	#include "path-util.h"
13	#include "random-util.h"
14	#include "string-util.h"
15	#include "sync-util.h"
16	#include "tmpfile-util.h"
17	#include "umask-util.h"
18
19	static int fopen_temporary_internal(int dir_fd, const char path, FILE *ret_file) {	159,820✔
20	_cleanup_fclose_ FILE *f = NULL;	159,820✔
21	_cleanup_close_ int fd = -EBADF;	159,820✔
22	int r;	159,820✔
23
24	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	159,820✔
25	assert(path);	159,820✔
26
27	fd = openat(dir_fd, path, O_CLOEXEC\|O_NOCTTY\|O_RDWR\|O_CREAT\|O_EXCL, 0600);	159,820✔
28	if (fd < 0)	159,820✔
29	return -errno;	1✔
30
31	/* This assumes that returned FILE object is short-lived and used within the same single-threaded
32	* context and never shared externally, hence locking is not necessary. */
33
34	r = take_fdopen_unlocked(&fd, "w", &f);	159,819✔
35	if (r < 0) {	159,819✔
UNCOV 36	(void) unlinkat(dir_fd, path, 0);	×
UNCOV 37	return r;	×
38	}
39
40	if (ret_file)	159,819✔
41	*ret_file = TAKE_PTR(f);	159,819✔
42
43	return 0;
44	}
45
46	int fopen_temporary_at(int dir_fd, const char path, FILE ret_file, char *ret_path) {	159,818✔
47	_cleanup_free_ char *t = NULL;	159,818✔
48	int r;	159,818✔
49
50	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	159,818✔
51	assert(path);	159,818✔
52
53	r = tempfn_random(path, NULL, &t);	159,818✔
54	if (r < 0)	159,818✔
55	return r;
56
57	r = fopen_temporary_internal(dir_fd, t, ret_file);	159,818✔
58	if (r < 0)	159,818✔
59	return r;
60
61	if (ret_path)	159,817✔
62	*ret_path = TAKE_PTR(t);	159,817✔
63
64	return 0;
65	}
66
67	int fopen_temporary_child_at(int dir_fd, const char path, FILE ret_file, char *ret_path) {	2✔
68	_cleanup_free_ char *t = NULL;	2✔
69	int r;	2✔
70
71	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	2✔
72
73	if (!path) {	2✔
74	r = tmp_dir(&path);	1✔
75	if (r < 0)	1✔
76	return r;
77	}
78
79	r = tempfn_random_child(path, NULL, &t);	2✔
80	if (r < 0)	2✔
81	return r;
82
83	r = fopen_temporary_internal(dir_fd, t, ret_file);	2✔
84	if (r < 0)	2✔
85	return r;
86
87	if (ret_path)	2✔
88	*ret_path = TAKE_PTR(t);	2✔
89
90	return 0;
91	}
92
93	/* This is much like mkostemp() but is subject to umask(). */
94	int mkostemp_safe(char *pattern) {	155✔
95	assert(pattern);	155✔
96	BLOCK_WITH_UMASK(0077);	155✔
97	return RET_NERRNO(mkostemp(pattern, O_CLOEXEC));	155✔
98	}
99
100	int fmkostemp_safe(char pattern, const char mode, FILE **ret_f) {	44✔
101	_cleanup_close_ int fd = -EBADF;	44✔
102	FILE *f;	44✔
103
104	fd = mkostemp_safe(pattern);	44✔
105	if (fd < 0)	44✔
106	return fd;
107
108	f = take_fdopen(&fd, mode);	44✔
109	if (!f)	44✔
UNCOV 110	return -errno;	×
111
112	*ret_f = f;	44✔
113	return 0;	44✔
114	}
115
116	void unlink_tempfilep(char (*p)[]) {	121✔
117	assert(p);	121✔
118
119	/* If the file is created with mkstemp(), it will (almost always) change the suffix.
120	* Treat this as a sign that the file was successfully created. We ignore both the rare case
121	* where the original suffix is used and unlink failures. */
122
123	if (!endswith(*p, ".XXXXXX"))	121✔
124	(void) unlink(*p);	119✔
125	}	121✔
126
127	static int tempfn_build(const char p, const char pre, const char post, bool child, char *ret) {	322,806✔
128	_cleanup_free_ char d = NULL, fn = NULL, nf = NULL, result = NULL;	322,806✔
129	size_t len_pre, len_post, len_add;	322,806✔
130	int r;	322,806✔
131
132	assert(p);	322,806✔
133	assert(ret);	322,806✔
134
135	/*
136	* Turns this:
137	* /foo/bar/waldo
138	*
139	* Into this :
140	* /foo/bar/waldo/.#<pre><post> (child == true)
141	* /foo/bar/.#<pre>waldo<post> (child == false)
142	*/
143
144	if (pre && strchr(pre, '/'))	322,806✔
145	return -EINVAL;
146
147	if (post && strchr(post, '/'))	322,803✔
148	return -EINVAL;
149
150	len_pre = strlen_ptr(pre);	322,803✔
151	len_post = strlen_ptr(post);	322,803✔
152	/* NAME_MAX is counted without the trailing NUL byte. */
153	if (len_pre > NAME_MAX - STRLEN(".#") \|\|	322,803✔
154	len_post > NAME_MAX - STRLEN(".#") - len_pre)	322,803✔
155	return -EINVAL;
156
157	len_add = len_pre + len_post + STRLEN(".#");	322,803✔
158
159	if (child) {	322,803✔
160	d = strdup(p);	1,970✔
161	if (!d)	1,970✔
162	return -ENOMEM;
163	} else {
164	r = path_extract_directory(p, &d);	320,833✔
165	if (r < 0 && r != -EDESTADDRREQ) /* EDESTADDRREQ → No directory specified, just a filename */	320,833✔
166	return r;
167
168	r = path_extract_filename(p, &fn);	320,825✔
169	if (r < 0)	320,825✔
170	return r;
171
172	if (strlen(fn) > NAME_MAX - len_add)	320,825✔
173	/* We cannot simply prepend and append strings to the filename. Let's truncate the filename. */
174	fn[NAME_MAX - len_add] = '\0';	4✔
175	}
176
177	nf = strjoin(".#", strempty(pre), strempty(fn), strempty(post));	645,476✔
178	if (!nf)	322,795✔
179	return -ENOMEM;
180
181	if (d) {	322,795✔
182	if (!path_extend(&d, nf))	322,257✔
183	return -ENOMEM;
184
185	result = path_simplify(TAKE_PTR(d));	322,257✔
186	} else
187	result = TAKE_PTR(nf);
188
189	if (!path_is_valid(result)) /* New path is not valid? (Maybe because too long?) Refuse. */	322,795✔
190	return -EINVAL;
191
192	*ret = TAKE_PTR(result);	322,792✔
193	return 0;	322,792✔
194	}
195
196	int tempfn_xxxxxx(const char p, const char extra, char **ret) {	27✔
197	/*
198	* Turns this:
199	* /foo/bar/waldo
200	*
201	* Into this:
202	* /foo/bar/.#<extra>waldoXXXXXX
203	*/
204
205	return tempfn_build(p, extra, "XXXXXX", /* child = */ false, ret);	27✔
206	}
207
208	int tempfn_random(const char p, const char extra, char **ret) {	320,808✔
209	_cleanup_free_ char *s = NULL;	320,808✔
210
211	assert(p);	320,808✔
212	assert(ret);	320,808✔
213
214	/*
215	* Turns this:
216	* /foo/bar/waldo
217	*
218	* Into this:
219	* /foo/bar/.#<extra>waldobaa2a261115984a9
220	*/
221
222	if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)	320,808✔
223	return -ENOMEM;
224
225	return tempfn_build(p, extra, s, /* child = */ false, ret);	320,808✔
226	}
227
228	int tempfn_random_child(const char p, const char extra, char **ret) {	1,971✔
229	_cleanup_free_ char *s = NULL;	1,971✔
230	int r;	1,971✔
231
232	assert(ret);	1,971✔
233
234	/* Turns this:
235	* /foo/bar/waldo
236	* Into this:
237	* /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
238	*/
239
240	if (!p) {	1,971✔
241	r = tmp_dir(&p);	15✔
242	if (r < 0)	15✔
243	return r;
244	}
245
246	if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)	1,971✔
247	return -ENOMEM;
248
249	return tempfn_build(p, extra, s, /* child = */ true, ret);	1,971✔
250	}
251
252	int open_tmpfile_unlinkable(const char *directory, int flags) {	6,377✔
253	char *p;	6,377✔
254	int fd, r;	6,377✔
255
256	if (!directory) {	6,377✔
257	r = tmp_dir(&directory);	7✔
258	if (r < 0)	7✔
259	return r;
260	} else if (isempty(directory))	6,370✔
261	return -EINVAL;
262
263	/* Returns an unlinked temporary file that cannot be linked into the file system anymore */
264
265	/* Try O_TMPFILE first, if it is supported */
266	fd = open(directory, flags\|O_TMPFILE\|O_EXCL, S_IRUSR\|S_IWUSR);	6,377✔
267	if (fd >= 0)	6,377✔
268	return fd;
269
270	/* Fall back to unguessable name + unlinking */
UNCOV 271	p = strjoina(directory, "/systemd-tmp-XXXXXX");	×
272
UNCOV 273	fd = mkostemp_safe(p);	×
UNCOV 274	if (fd < 0)	×
275	return fd;
276
UNCOV 277	(void) unlink(p);	×
278
UNCOV 279	return fd;	×
280	}
281
282	int open_tmpfile_linkable_at(int dir_fd, const char target, int flags, char *ret_path) {	6,953✔
283	_cleanup_free_ char *tmp = NULL;	6,953✔
284	int r, fd;	6,953✔
285
286	assert(target);	6,953✔
287	assert(ret_path);	6,953✔
288
289	/* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */
290	assert((flags & O_EXCL) == 0);	6,953✔
291
292	/* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in
293	* which case "ret_path" will be returned as NULL. If not possible the temporary path name used is returned in
294	* "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */
295
296	fd = open_parent_at(dir_fd, target, O_TMPFILE\|flags, 0640);	6,953✔
297	if (fd >= 0) {	6,953✔
298	*ret_path = NULL;	6,920✔
299	return fd;	6,920✔
300	}
301
302	log_debug_errno(fd, "Failed to use O_TMPFILE for %s: %m", target);	33✔
303
304	r = tempfn_random(target, NULL, &tmp);	33✔
305	if (r < 0)	33✔
306	return r;
307
308	fd = openat(dir_fd, tmp, O_CREAT\|O_EXCL\|O_NOFOLLOW\|O_NOCTTY\|flags, 0640);	33✔
309	if (fd < 0)	33✔
310	return -errno;	17✔
311
312	*ret_path = TAKE_PTR(tmp);	16✔
313
314	return fd;	16✔
315	}
316
317	int fopen_tmpfile_linkable_at(int dir_fd, const char target, int flags, char ret_path, FILE *ret_file) {	4,248✔
318	_cleanup_free_ char *path = NULL;	4,248✔
319	_cleanup_fclose_ FILE *f = NULL;	4,248✔
320	_cleanup_close_ int fd = -EBADF;	4,248✔
321
322	assert(target);	4,248✔
323	assert(ret_file);	4,248✔
324	assert(ret_path);	4,248✔
325
326	fd = open_tmpfile_linkable_at(dir_fd, target, flags, &path);	4,248✔
327	if (fd < 0)	4,248✔
328	return fd;
329
330	f = take_fdopen(&fd, "w");	4,248✔
331	if (!f)	4,248✔
332	return -ENOMEM;
333
334	*ret_path = TAKE_PTR(path);	4,248✔
335	*ret_file = TAKE_PTR(f);	4,248✔
336	return 0;	4,248✔
337	}
338
339	int link_tmpfile_at(int fd, int dir_fd, const char path, const char target, LinkTmpfileFlags flags) {	6,880✔
340	int r;	6,880✔
341
342	assert(fd >= 0);	6,880✔
343	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	6,880✔
344	assert(target);	6,880✔
345
346	/* Moves a temporary file created with open_tmpfile() above into its final place. If "path" is NULL
347	* an fd created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE
348	* is not supported on the directory, and renameat2() is used instead. */
349
350	if (FLAGS_SET(flags, LINK_TMPFILE_SYNC) && fsync(fd) < 0)	6,880✔
UNCOV 351	return -errno;	×
352
353	if (path) {	6,880✔
354	if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))	16✔
UNCOV 355	r = RET_NERRNO(renameat(dir_fd, path, dir_fd, target));	×
356	else
357	r = rename_noreplace(dir_fd, path, dir_fd, target);	16✔
358	} else {
359	if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))	6,864✔
360	r = linkat_replace(fd, /* oldpath= */ NULL, dir_fd, target);	5,988✔
361	else
362	r = link_fd(fd, dir_fd, target);	876✔
363	}
364	if (r < 0)	6,880✔
365	return r;
366
367	if (FLAGS_SET(flags, LINK_TMPFILE_SYNC)) {	6,877✔
368	r = fsync_full(fd);	1,385✔
369	if (r < 0)	1,385✔
UNCOV 370	return r;	×
371	}
372
373	return 0;
374	}
375
376	int flink_tmpfile_at(FILE f, int dir_fd, const char path, const char *target, LinkTmpfileFlags flags) {	4,248✔
377	int fd, r;	4,248✔
378
379	assert(f);	4,248✔
380	assert(target);	4,248✔
381
382	fd = fileno(f);	4,248✔
383	if (fd < 0) /* Not all FILE* objects encapsulate fds */	4,248✔
384	return -EBADF;
385
386	r = fflush_and_check(f);	4,248✔
387	if (r < 0)	4,248✔
388	return r;
389
390	return link_tmpfile_at(fd, dir_fd, path, target, flags);	4,248✔
391	}
392
393	int mkdtemp_malloc(const char template, char *ret) {	3,742✔
394	_cleanup_free_ char *p = NULL;	7,484✔
395	int r;	3,742✔
396
397	assert(ret);	3,742✔
398
399	if (template)	3,742✔
400	p = strdup(template);	3,665✔
401	else {
402	const char *tmp;	77✔
403
404	r = tmp_dir(&tmp);	77✔
405	if (r < 0)	77✔
UNCOV 406	return r;	×
407
408	p = path_join(tmp, "XXXXXX");	77✔
409	}
410	if (!p)	3,742✔
411	return -ENOMEM;
412
413	if (!mkdtemp(p))	3,742✔
UNCOV 414	return -errno;	×
415
416	*ret = TAKE_PTR(p);	3,742✔
417	return 0;	3,742✔
418	}
419
420	int mkdtemp_open(const char template, int flags, char *ret) {	36✔
421	_cleanup_free_ char *p = NULL;	36✔
422	int fd, r;	36✔
423
424	r = mkdtemp_malloc(template, &p);	36✔
425	if (r < 0)	36✔
426	return r;
427
428	fd = RET_NERRNO(open(p, O_DIRECTORY\|O_CLOEXEC\|flags));	36✔
UNCOV 429	if (fd < 0) {	×
UNCOV 430	(void) rmdir(p);	×
UNCOV 431	return fd;	×
432	}
433
434	if (ret)	36✔
435	*ret = TAKE_PTR(p);	36✔
436
437	return fd;
438	}

systemd / systemd / 15263807472

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