#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
-#include "hexdecoct.h"
#include "log.h"
#include "macro.h"
#include "missing.h"
#include "parse-util.h"
#include "path-util.h"
#include "process-util.h"
-#include "random-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
-#include "time-util.h"
-#include "umask-util.h"
+#include "tmpfile-util.h"
#include "utf8.h"
#define READ_FULL_BYTES_MAX (4U*1024U*1024U)
return search_and_fopen_internal(path, mode, root, s, _f);
}
-int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
- FILE *f;
- char *t;
- int r, fd;
-
- assert(path);
- assert(_f);
- assert(_temp_path);
-
- r = tempfn_xxxxxx(path, NULL, &t);
- if (r < 0)
- return r;
-
- fd = mkostemp_safe(t);
- if (fd < 0) {
- free(t);
- return -errno;
- }
-
- f = fdopen(fd, "we");
- if (!f) {
- unlink_noerrno(t);
- free(t);
- safe_close(fd);
- return -errno;
- }
-
- *_f = f;
- *_temp_path = t;
-
- return 0;
-}
-
int fflush_and_check(FILE *f) {
assert(f);
return 0;
}
-/* This is much like mkostemp() but is subject to umask(). */
-int mkostemp_safe(char *pattern) {
- _cleanup_umask_ mode_t u = 0;
- int fd;
-
- assert(pattern);
-
- u = umask(077);
-
- fd = mkostemp(pattern, O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- return fd;
-}
-
-int fmkostemp_safe(char *pattern, const char *mode, FILE **ret_f) {
- int fd;
- FILE *f;
-
- fd = mkostemp_safe(pattern);
- if (fd < 0)
- return fd;
-
- f = fdopen(fd, mode);
- if (!f) {
- safe_close(fd);
- return -errno;
- }
-
- *ret_f = f;
- return 0;
-}
-
-int tempfn_xxxxxx(const char *p, const char *extra, char **ret) {
- const char *fn;
- char *t;
-
- assert(ret);
-
- if (isempty(p))
- return -EINVAL;
- if (path_equal(p, "/"))
- return -EINVAL;
-
- /*
- * Turns this:
- * /foo/bar/waldo
- *
- * Into this:
- * /foo/bar/.#<extra>waldoXXXXXX
- */
-
- fn = basename(p);
- if (!filename_is_valid(fn))
- return -EINVAL;
-
- extra = strempty(extra);
-
- t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1);
- if (!t)
- return -ENOMEM;
-
- strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX");
-
- *ret = path_simplify(t, false);
- return 0;
-}
-
-int tempfn_random(const char *p, const char *extra, char **ret) {
- const char *fn;
- char *t, *x;
- uint64_t u;
- unsigned i;
-
- assert(ret);
-
- if (isempty(p))
- return -EINVAL;
- if (path_equal(p, "/"))
- return -EINVAL;
-
- /*
- * Turns this:
- * /foo/bar/waldo
- *
- * Into this:
- * /foo/bar/.#<extra>waldobaa2a261115984a9
- */
-
- fn = basename(p);
- if (!filename_is_valid(fn))
- return -EINVAL;
-
- extra = strempty(extra);
-
- t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1);
- if (!t)
- return -ENOMEM;
-
- x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn);
-
- u = random_u64();
- for (i = 0; i < 16; i++) {
- *(x++) = hexchar(u & 0xF);
- u >>= 4;
- }
-
- *x = 0;
-
- *ret = path_simplify(t, false);
- return 0;
-}
-
-int tempfn_random_child(const char *p, const char *extra, char **ret) {
- char *t, *x;
- uint64_t u;
- unsigned i;
- 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;
- }
-
- extra = strempty(extra);
-
- t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1);
- if (!t)
- return -ENOMEM;
-
- if (isempty(p))
- x = stpcpy(stpcpy(t, ".#"), extra);
- else
- x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra);
-
- u = random_u64();
- for (i = 0; i < 16; i++) {
- *(x++) = hexchar(u & 0xF);
- u >>= 4;
- }
-
- *x = 0;
-
- *ret = path_simplify(t, false);
- return 0;
-}
-
int write_timestamp_file_atomic(const char *fn, usec_t n) {
char ln[DECIMAL_STR_MAX(n)+2];
return fputs(s, f);
}
-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(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 a the tempoary 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(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 = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640);
- if (fd < 0)
- return -errno;
-
- *ret_path = TAKE_PTR(tmp);
-
- return fd;
-}
-
int open_serialization_fd(const char *ident) {
int fd;
return fd;
}
-int link_tmpfile(int fd, const char *path, const char *target) {
- int r;
-
- assert(fd >= 0);
- 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.
- *
- * Note that in both cases we will not replace existing files. This is because linkat() does not support this
- * operation currently (renameat2() does), and there is no nice way to emulate this. */
-
- if (path) {
- r = rename_noreplace(AT_FDCWD, path, AT_FDCWD, target);
- if (r < 0)
- return r;
- } else {
- char proc_fd_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1];
-
- xsprintf(proc_fd_path, "/proc/self/fd/%i", fd);
-
- if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0)
- return -errno;
- }
-
- return 0;
-}
-
int read_nul_string(FILE *f, char **ret) {
_cleanup_free_ char *x = NULL;
size_t allocated = 0, n = 0;
return 0;
}
-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 = strjoin(tmp, "/XXXXXX");
- }
- if (!p)
- return -ENOMEM;
-
- if (!mkdtemp(p))
- return -errno;
-
- *ret = TAKE_PTR(p);
- return 0;
-}
-
DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, funlockfile);
int read_line(FILE *f, size_t limit, char **ret) {
projects / thirdparty / systemd.git / blobdiff