14554080340

Committed 19 Apr 2025 11:46AM UTC coverage: 72.101% (-0.03%) from 72.13%

Build # 14554080340

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web-flow

Commit Message

Add two new paragraphs to coding style about header files (#37188)

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92.23

/src/basic/tmpfile-util.c

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

#include <sys/mman.h>

#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "hexdecoct.h"
#include "log.h"
#include "macro.h"
#include "memfd-util.h"
#include "missing_fcntl.h"
#include "missing_syscall.h"
#include "path-util.h"
#include "process-util.h"
#include "random-util.h"
#include "stat-util.h"
#include "stdio-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(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(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(FILE *f, 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(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 <sys/mman.h>
4
5	#include "alloc-util.h"
6	#include "fd-util.h"
7	#include "fileio.h"
8	#include "fs-util.h"
9	#include "hexdecoct.h"
10	#include "log.h"
11	#include "macro.h"
12	#include "memfd-util.h"
13	#include "missing_fcntl.h"
14	#include "missing_syscall.h"
15	#include "path-util.h"
16	#include "process-util.h"
17	#include "random-util.h"
18	#include "stat-util.h"
19	#include "stdio-util.h"
20	#include "string-util.h"
21	#include "sync-util.h"
22	#include "tmpfile-util.h"
23	#include "umask-util.h"
24
25	static int fopen_temporary_internal(int dir_fd, const char path, FILE *ret_file) {	162,552✔
26	_cleanup_fclose_ FILE *f = NULL;	162,552✔
27	_cleanup_close_ int fd = -EBADF;	162,552✔
28	int r;	162,552✔
29
30	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	162,552✔
31	assert(path);	162,552✔
32
33	fd = openat(dir_fd, path, O_CLOEXEC\|O_NOCTTY\|O_RDWR\|O_CREAT\|O_EXCL, 0600);	162,552✔
34	if (fd < 0)	162,552✔
35	return -errno;	1✔
36
37	/* This assumes that returned FILE object is short-lived and used within the same single-threaded
38	* context and never shared externally, hence locking is not necessary. */
39
40	r = take_fdopen_unlocked(&fd, "w", &f);	162,551✔
41	if (r < 0) {	162,551✔
42	(void) unlinkat(dir_fd, path, 0);	×
43	return r;	×
44	}
45
46	if (ret_file)	162,551✔
47	*ret_file = TAKE_PTR(f);	162,551✔
48
49	return 0;
50	}
51
52	int fopen_temporary_at(int dir_fd, const char path, FILE ret_file, char *ret_path) {	162,550✔
53	_cleanup_free_ char *t = NULL;	162,550✔
54	int r;	162,550✔
55
56	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	162,550✔
57	assert(path);	162,550✔
58
59	r = tempfn_random(path, NULL, &t);	162,550✔
60	if (r < 0)	162,550✔
61	return r;
62
63	r = fopen_temporary_internal(dir_fd, t, ret_file);	162,550✔
64	if (r < 0)	162,550✔
65	return r;
66
67	if (ret_path)	162,549✔
68	*ret_path = TAKE_PTR(t);	162,549✔
69
70	return 0;
71	}
72
73	int fopen_temporary_child_at(int dir_fd, const char path, FILE ret_file, char *ret_path) {	2✔
74	_cleanup_free_ char *t = NULL;	2✔
75	int r;	2✔
76
77	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	2✔
78
79	if (!path) {	2✔
80	r = tmp_dir(&path);	1✔
81	if (r < 0)	1✔
82	return r;
83	}
84
85	r = tempfn_random_child(path, NULL, &t);	2✔
86	if (r < 0)	2✔
87	return r;
88
89	r = fopen_temporary_internal(dir_fd, t, ret_file);	2✔
90	if (r < 0)	2✔
91	return r;
92
93	if (ret_path)	2✔
94	*ret_path = TAKE_PTR(t);	2✔
95
96	return 0;
97	}
98
99	/* This is much like mkostemp() but is subject to umask(). */
100	int mkostemp_safe(char *pattern) {	155✔
101	assert(pattern);	155✔
102	BLOCK_WITH_UMASK(0077);	155✔
103	return RET_NERRNO(mkostemp(pattern, O_CLOEXEC));	155✔
104	}
105
106	int fmkostemp_safe(char pattern, const char mode, FILE **ret_f) {	44✔
107	_cleanup_close_ int fd = -EBADF;	44✔
108	FILE *f;	44✔
109
110	fd = mkostemp_safe(pattern);	44✔
111	if (fd < 0)	44✔
112	return fd;
113
114	f = take_fdopen(&fd, mode);	44✔
115	if (!f)	44✔
116	return -errno;	×
117
118	*ret_f = f;	44✔
119	return 0;	44✔
120	}
121
122	void unlink_tempfilep(char (*p)[]) {	121✔
123	assert(p);	121✔
124
125	/* If the file is created with mkstemp(), it will (almost always) change the suffix.
126	* Treat this as a sign that the file was successfully created. We ignore both the rare case
127	* where the original suffix is used and unlink failures. */
128
129	if (!endswith(*p, ".XXXXXX"))	121✔
130	(void) unlink(*p);	119✔
131	}	121✔
132
133	static int tempfn_build(const char p, const char pre, const char post, bool child, char *ret) {	303,414✔
134	_cleanup_free_ char d = NULL, fn = NULL, nf = NULL, result = NULL;	303,414✔
135	size_t len_pre, len_post, len_add;	303,414✔
136	int r;	303,414✔
137
138	assert(p);	303,414✔
139	assert(ret);	303,414✔
140
141	/*
142	* Turns this:
143	* /foo/bar/waldo
144	*
145	* Into this :
146	* /foo/bar/waldo/.#<pre><post> (child == true)
147	* /foo/bar/.#<pre>waldo<post> (child == false)
148	*/
149
150	if (pre && strchr(pre, '/'))	303,414✔
151	return -EINVAL;
152
153	if (post && strchr(post, '/'))	303,411✔
154	return -EINVAL;
155
156	len_pre = strlen_ptr(pre);	303,411✔
157	len_post = strlen_ptr(post);	303,411✔
158	/* NAME_MAX is counted without the trailing NUL byte. */
159	if (len_pre > NAME_MAX - STRLEN(".#") \|\|	303,411✔
160	len_post > NAME_MAX - STRLEN(".#") - len_pre)	303,411✔
161	return -EINVAL;
162
163	len_add = len_pre + len_post + STRLEN(".#");	303,411✔
164
165	if (child) {	303,411✔
166	d = strdup(p);	1,956✔
167	if (!d)	1,956✔
168	return -ENOMEM;
169	} else {
170	r = path_extract_directory(p, &d);	301,455✔
171	if (r < 0 && r != -EDESTADDRREQ) /* EDESTADDRREQ → No directory specified, just a filename */	301,455✔
172	return r;
173
174	r = path_extract_filename(p, &fn);	301,447✔
175	if (r < 0)	301,447✔
176	return r;
177
178	if (strlen(fn) > NAME_MAX - len_add)	301,447✔
179	/* We cannot simply prepend and append strings to the filename. Let's truncate the filename. */
180	fn[NAME_MAX - len_add] = '\0';	4✔
181	}
182
183	nf = strjoin(".#", strempty(pre), strempty(fn), strempty(post));	606,692✔
184	if (!nf)	303,403✔
185	return -ENOMEM;
186
187	if (d) {	303,403✔
188	if (!path_extend(&d, nf))	302,866✔
189	return -ENOMEM;
190
191	result = path_simplify(TAKE_PTR(d));	302,866✔
192	} else
193	result = TAKE_PTR(nf);
194
195	if (!path_is_valid(result)) /* New path is not valid? (Maybe because too long?) Refuse. */	303,403✔
196	return -EINVAL;
197
198	*ret = TAKE_PTR(result);	303,400✔
199	return 0;	303,400✔
200	}
201
202	int tempfn_xxxxxx(const char p, const char extra, char **ret) {	27✔
203	/*
204	* Turns this:
205	* /foo/bar/waldo
206	*
207	* Into this:
208	* /foo/bar/.#<extra>waldoXXXXXX
209	*/
210
211	return tempfn_build(p, extra, "XXXXXX", /* child = */ false, ret);	27✔
212	}
213
214	int tempfn_random(const char p, const char extra, char **ret) {	301,430✔
215	_cleanup_free_ char *s = NULL;	301,430✔
216
217	assert(p);	301,430✔
218	assert(ret);	301,430✔
219
220	/*
221	* Turns this:
222	* /foo/bar/waldo
223	*
224	* Into this:
225	* /foo/bar/.#<extra>waldobaa2a261115984a9
226	*/
227
228	if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)	301,430✔
229	return -ENOMEM;
230
231	return tempfn_build(p, extra, s, /* child = */ false, ret);	301,430✔
232	}
233
234	int tempfn_random_child(const char p, const char extra, char **ret) {	1,957✔
235	_cleanup_free_ char *s = NULL;	1,957✔
236	int r;	1,957✔
237
238	assert(ret);	1,957✔
239
240	/* Turns this:
241	* /foo/bar/waldo
242	* Into this:
243	* /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
244	*/
245
246	if (!p) {	1,957✔
247	r = tmp_dir(&p);	15✔
248	if (r < 0)	15✔
249	return r;
250	}
251
252	if (asprintf(&s, "%016" PRIx64, random_u64()) < 0)	1,957✔
253	return -ENOMEM;
254
255	return tempfn_build(p, extra, s, /* child = */ true, ret);	1,957✔
256	}
257
258	int open_tmpfile_unlinkable(const char *directory, int flags) {	6,368✔
259	char *p;	6,368✔
260	int fd, r;	6,368✔
261
262	if (!directory) {	6,368✔
263	r = tmp_dir(&directory);	7✔
264	if (r < 0)	7✔
265	return r;
266	} else if (isempty(directory))	6,361✔
267	return -EINVAL;
268
269	/* Returns an unlinked temporary file that cannot be linked into the file system anymore */
270
271	/* Try O_TMPFILE first, if it is supported */
272	fd = open(directory, flags\|O_TMPFILE\|O_EXCL, S_IRUSR\|S_IWUSR);	6,368✔
273	if (fd >= 0)	6,368✔
274	return fd;
275
276	/* Fall back to unguessable name + unlinking */
277	p = strjoina(directory, "/systemd-tmp-XXXXXX");	×
278
279	fd = mkostemp_safe(p);	×
280	if (fd < 0)	×
281	return fd;
282
283	(void) unlink(p);	×
284
285	return fd;	×
286	}
287
288	int open_tmpfile_linkable_at(int dir_fd, const char target, int flags, char *ret_path) {	2,743✔
289	_cleanup_free_ char *tmp = NULL;	2,743✔
290	int r, fd;	2,743✔
291
292	assert(target);	2,743✔
293	assert(ret_path);	2,743✔
294
295	/* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */
296	assert((flags & O_EXCL) == 0);	2,743✔
297
298	/* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in
299	* which case "ret_path" will be returned as NULL. If not possible the temporary path name used is returned in
300	* "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */
301
302	fd = open_parent_at(dir_fd, target, O_TMPFILE\|flags, 0640);	2,743✔
303	if (fd >= 0) {	2,743✔
304	*ret_path = NULL;	2,710✔
305	return fd;	2,710✔
306	}
307
308	log_debug_errno(fd, "Failed to use O_TMPFILE for %s: %m", target);	33✔
309
310	r = tempfn_random(target, NULL, &tmp);	33✔
311	if (r < 0)	33✔
312	return r;
313
314	fd = openat(dir_fd, tmp, O_CREAT\|O_EXCL\|O_NOFOLLOW\|O_NOCTTY\|flags, 0640);	33✔
315	if (fd < 0)	33✔
316	return -errno;	17✔
317
318	*ret_path = TAKE_PTR(tmp);	16✔
319
320	return fd;	16✔
321	}
322
323	int fopen_tmpfile_linkable(const char target, int flags, char ret_path, FILE *ret_file) {	44✔
324	_cleanup_free_ char *path = NULL;	44✔
325	_cleanup_fclose_ FILE *f = NULL;	44✔
326	_cleanup_close_ int fd = -EBADF;	44✔
327
328	assert(target);	44✔
329	assert(ret_file);	44✔
330	assert(ret_path);	44✔
331
332	fd = open_tmpfile_linkable(target, flags, &path);	44✔
333	if (fd < 0)	44✔
334	return fd;
335
336	f = take_fdopen(&fd, "w");	44✔
337	if (!f)	44✔
338	return -ENOMEM;
339
340	*ret_path = TAKE_PTR(path);	44✔
341	*ret_file = TAKE_PTR(f);	44✔
342	return 0;	44✔
343	}
344
345	int link_tmpfile_at(int fd, int dir_fd, const char path, const char target, LinkTmpfileFlags flags) {	2,672✔
346	int r;	2,672✔
347
348	assert(fd >= 0);	2,672✔
349	assert(dir_fd >= 0 \|\| dir_fd == AT_FDCWD);	2,672✔
350	assert(target);	2,672✔
351
352	/* Moves a temporary file created with open_tmpfile() above into its final place. If "path" is NULL
353	* an fd created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE
354	* is not supported on the directory, and renameat2() is used instead. */
355
356	if (FLAGS_SET(flags, LINK_TMPFILE_SYNC) && fsync(fd) < 0)	2,672✔
357	return -errno;	×
358
359	if (path) {	2,672✔
360	if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))	16✔
361	r = RET_NERRNO(renameat(dir_fd, path, dir_fd, target));	×
362	else
363	r = rename_noreplace(dir_fd, path, dir_fd, target);	16✔
364	} else {
365	if (FLAGS_SET(flags, LINK_TMPFILE_REPLACE))	2,656✔
366	r = linkat_replace(fd, /* oldpath= */ NULL, dir_fd, target);	1,782✔
367	else
368	r = link_fd(fd, dir_fd, target);	874✔
369	}
370	if (r < 0)	2,672✔
371	return r;
372
373	if (FLAGS_SET(flags, LINK_TMPFILE_SYNC)) {	2,669✔
374	r = fsync_full(fd);	1,099✔
375	if (r < 0)	1,099✔
376	return r;	×
377	}
378
379	return 0;
380	}
381
382	int flink_tmpfile(FILE f, const char path, const char *target, LinkTmpfileFlags flags) {	44✔
383	int fd, r;	44✔
384
385	assert(f);	44✔
386	assert(target);	44✔
387
388	fd = fileno(f);	44✔
389	if (fd < 0) /* Not all FILE* objects encapsulate fds */	44✔
390	return -EBADF;
391
392	r = fflush_and_check(f);	44✔
393	if (r < 0)	44✔
394	return r;
395
396	return link_tmpfile(fd, path, target, flags);	44✔
397	}
398
399	int mkdtemp_malloc(const char template, char *ret) {	3,733✔
400	_cleanup_free_ char *p = NULL;	7,466✔
401	int r;	3,733✔
402
403	assert(ret);	3,733✔
404
405	if (template)	3,733✔
406	p = strdup(template);	3,656✔
407	else {
408	const char *tmp;	77✔
409
410	r = tmp_dir(&tmp);	77✔
411	if (r < 0)	77✔
412	return r;	×
413
414	p = path_join(tmp, "XXXXXX");	77✔
415	}
416	if (!p)	3,733✔
417	return -ENOMEM;
418
419	if (!mkdtemp(p))	3,733✔
420	return -errno;	×
421
422	*ret = TAKE_PTR(p);	3,733✔
423	return 0;	3,733✔
424	}
425
426	int mkdtemp_open(const char template, int flags, char *ret) {	36✔
427	_cleanup_free_ char *p = NULL;	36✔
428	int fd, r;	36✔
429
430	r = mkdtemp_malloc(template, &p);	36✔
431	if (r < 0)	36✔
432	return r;
433
434	fd = RET_NERRNO(open(p, O_DIRECTORY\|O_CLOEXEC\|flags));	36✔
435	if (fd < 0) {	×
436	(void) rmdir(p);	×
437	return fd;	×
438	}
439
440	if (ret)	36✔
441	*ret = TAKE_PTR(p);	36✔
442
443	return fd;
444	}

systemd / systemd / 14554080340

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