+ return t;
+}
+
+bool ignore_file(const char *filename) {
+ assert(filename);
+
+ return
+ filename[0] == '.' ||
+ endswith(filename, "~") ||
+ endswith(filename, ".rpmnew") ||
+ endswith(filename, ".rpmsave") ||
+ endswith(filename, ".rpmorig") ||
+ endswith(filename, ".dpkg-old") ||
+ endswith(filename, ".dpkg-new") ||
+ endswith(filename, ".swp");
+}
+
+int fd_nonblock(int fd, bool nonblock) {
+ int flags;
+
+ assert(fd >= 0);
+
+ if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
+ return -errno;
+
+ if (nonblock)
+ flags |= O_NONBLOCK;
+ else
+ flags &= ~O_NONBLOCK;
+
+ if (fcntl(fd, F_SETFL, flags) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int fd_cloexec(int fd, bool cloexec) {
+ int flags;
+
+ assert(fd >= 0);
+
+ if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
+ return -errno;
+
+ if (cloexec)
+ flags |= FD_CLOEXEC;
+ else
+ flags &= ~FD_CLOEXEC;
+
+ if (fcntl(fd, F_SETFD, flags) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int close_all_fds(const int except[], unsigned n_except) {
+ DIR *d;
+ struct dirent *de;
+ int r = 0;
+
+ if (!(d = opendir("/proc/self/fd")))
+ return -errno;
+
+ while ((de = readdir(d))) {
+ int fd = -1;
+
+ if (de->d_name[0] == '.')
+ continue;
+
+ if ((r = safe_atoi(de->d_name, &fd)) < 0)
+ goto finish;
+
+ if (fd < 3)
+ continue;
+
+ if (fd == dirfd(d))
+ continue;
+
+ if (except) {
+ bool found;
+ unsigned i;
+
+ found = false;
+ for (i = 0; i < n_except; i++)
+ if (except[i] == fd) {
+ found = true;
+ break;
+ }
+
+ if (found)
+ continue;
+ }
+
+ if ((r = close_nointr(fd)) < 0) {
+ /* Valgrind has its own FD and doesn't want to have it closed */
+ if (errno != EBADF)
+ goto finish;
+ }
+ }
+
+ r = 0;
+
+finish:
+ closedir(d);
+ return r;
+}
+
+bool chars_intersect(const char *a, const char *b) {
+ const char *p;
+
+ /* Returns true if any of the chars in a are in b. */
+ for (p = a; *p; p++)
+ if (strchr(b, *p))
+ return true;
+
+ return false;
+}
+
+char *format_timestamp(char *buf, size_t l, usec_t t) {
+ struct tm tm;
+ time_t sec;
+
+ assert(buf);
+ assert(l > 0);
+
+ if (t <= 0)
+ return NULL;
+
+ sec = (time_t) t / USEC_PER_SEC;
+
+ if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
+ return NULL;
+
+ return buf;