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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include "sd-daemon.h"
33 #define MAKE_SET(s) ((Set*) s)
34 #define MAKE_FDSET(s) ((FDSet*) s)
36 /* Make sure we can distuingish fd 0 and NULL */
37 #define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
38 #define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
40 FDSet *fdset_new(void) {
41 return MAKE_FDSET(set_new(trivial_hash_func, trivial_compare_func));
44 void fdset_free(FDSet *s) {
47 while ((p = set_steal_first(MAKE_SET(s)))) {
48 /* Valgrind's fd might have ended up in this set here,
49 * due to fdset_new_fill(). We'll ignore all failures
50 * here, so that the EBADFD that valgrind will return
51 * us on close() doesn't influence us */
53 /* When reloading duplicates of the private bus
54 * connection fds and suchlike are closed here, which
55 * has no effect at all, since they are only
56 * duplicates. So don't be surprised about these log
59 log_debug("Closing left-over fd %i", PTR_TO_FD(p));
60 close_nointr(PTR_TO_FD(p));
63 set_free(MAKE_SET(s));
66 int fdset_put(FDSet *s, int fd) {
70 return set_put(MAKE_SET(s), FD_TO_PTR(fd));
73 int fdset_put_dup(FDSet *s, int fd) {
79 copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
83 r = fdset_put(s, copy);
85 close_nointr_nofail(copy);
92 bool fdset_contains(FDSet *s, int fd) {
96 return !!set_get(MAKE_SET(s), FD_TO_PTR(fd));
99 int fdset_remove(FDSet *s, int fd) {
103 return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT;
106 int fdset_new_fill(FDSet **_s) {
114 /* Creates an fdset and fills in all currently open file
117 d = opendir("/proc/self/fd");
127 while ((de = readdir(d))) {
130 if (ignore_file(de->d_name))
133 r = safe_atoi(de->d_name, &fd);
143 r = fdset_put(s, fd);
155 /* We won't close the fds here! */
157 set_free(MAKE_SET(s));
162 int fdset_cloexec(FDSet *fds, bool b) {
169 SET_FOREACH(p, MAKE_SET(fds), i)
170 if ((r = fd_cloexec(PTR_TO_FD(p), b)) < 0)
176 int fdset_new_listen_fds(FDSet **_s, bool unset) {
182 /* Creates an fdset and fills in all passed file descriptors */
190 n = sd_listen_fds(unset);
191 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
192 r = fdset_put(s, fd);
203 set_free(MAKE_SET(s));
208 int fdset_close_others(FDSet *fds) {
214 j = 0, m = fdset_size(fds);
215 a = alloca(sizeof(int) * m);
216 SET_FOREACH(e, MAKE_SET(fds), i)
217 a[j++] = PTR_TO_FD(e);
221 return close_all_fds(a, j);
224 unsigned fdset_size(FDSet *fds) {
225 return set_size(MAKE_SET(fds));
228 int fdset_iterate(FDSet *s, Iterator *i) {
231 p = set_iterate(MAKE_SET(s), i);