1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #define MAKE_SET(s) ((Set*) s)
33 #define MAKE_FDSET(s) ((FDSet*) s)
35 /* Make sure we can distuingish fd 0 and NULL */
36 #define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
37 #define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
39 FDSet *fdset_new(void) {
40 return MAKE_FDSET(set_new(trivial_hash_func, trivial_compare_func));
43 void fdset_free(FDSet *s) {
46 while ((p = set_steal_first(MAKE_SET(s)))) {
47 /* Valgrind's fd might have ended up in this set here,
48 * due to fdset_new_fill(). We'll ignore all failures
49 * here, so that the EBADFD that valgrind will return
50 * us on close() doesn't influence us */
52 /* log_warning("Closing left-over fd %i", PTR_TO_FD(p)); */
53 close_nointr(PTR_TO_FD(p));
56 set_free(MAKE_SET(s));
59 int fdset_put(FDSet *s, int fd) {
63 return set_put(MAKE_SET(s), FD_TO_PTR(fd));
66 int fdset_put_dup(FDSet *s, int fd) {
72 if ((copy = fcntl(fd, F_DUPFD_CLOEXEC, 3)) < 0)
75 if ((r = fdset_put(s, copy)) < 0) {
76 close_nointr_nofail(copy);
83 bool fdset_contains(FDSet *s, int fd) {
87 return !!set_get(MAKE_SET(s), FD_TO_PTR(fd));
90 int fdset_remove(FDSet *s, int fd) {
94 return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT;
97 int fdset_new_fill(FDSet **_s) {
105 /* Creates an fdsets and fills in all currently open file
108 if (!(d = opendir("/proc/self/fd")))
111 if (!(s = fdset_new())) {
116 while ((de = readdir(d))) {
119 if (ignore_file(de->d_name))
122 if ((r = safe_atoi(de->d_name, &fd)) < 0)
131 if ((r = fdset_put(s, fd)) < 0)
142 /* We won't close the fds here! */
144 set_free(MAKE_SET(s));
149 int fdset_cloexec(FDSet *fds, bool b) {
156 SET_FOREACH(p, MAKE_SET(fds), i)
157 if ((r = fd_cloexec(PTR_TO_FD(p), b)) < 0)