+ if (!f) {
+ if (errno == ENOENT)
+ return -ESRCH;
+ else if (errno != EPERM && errno != EACCES)
+ return -errno;
+ } else {
+ char line[LINE_MAX];
+
+ FOREACH_LINE(line, f, return -errno) {
+ truncate_nl(line);
+
+ if (missing & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID)) {
+ p = startswith(line, "Uid:");
+ if (p) {
+ unsigned long uid, euid, suid, fsuid;
+
+ p += strspn(p, WHITESPACE);
+ if (sscanf(p, "%lu %lu %lu %lu", &uid, &euid, &suid, &fsuid) != 4)
+ return -EIO;
+
+ c->uid = (uid_t) uid;
+ c->euid = (uid_t) euid;
+ c->suid = (uid_t) suid;
+ c->fsuid = (uid_t) fsuid;
+ c->mask |= missing & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID);
+ continue;
+ }
+ }
+
+ if (missing & (SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID)) {
+ p = startswith(line, "Gid:");
+ if (p) {
+ unsigned long gid, egid, sgid, fsgid;
+
+ p += strspn(p, WHITESPACE);
+ if (sscanf(p, "%lu %lu %lu %lu", &gid, &egid, &sgid, &fsgid) != 4)
+ return -EIO;
+
+ c->gid = (gid_t) gid;
+ c->egid = (gid_t) egid;
+ c->sgid = (gid_t) sgid;
+ c->fsgid = (gid_t) fsgid;
+ c->mask |= missing & (SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID);
+ continue;
+ }
+ }