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(NULL));
44 int fdset_new_array(FDSet **ret, int *fds, unsigned n_fds) {
55 for (i = 0; i < n_fds; i++) {
57 r = fdset_put(s, fds[i]);
59 set_free(MAKE_SET(s));
68 FDSet* fdset_free(FDSet *s) {
71 while ((p = set_steal_first(MAKE_SET(s)))) {
72 /* Valgrind's fd might have ended up in this set here,
73 * due to fdset_new_fill(). We'll ignore all failures
74 * here, so that the EBADFD that valgrind will return
75 * us on close() doesn't influence us */
77 /* When reloading duplicates of the private bus
78 * connection fds and suchlike are closed here, which
79 * has no effect at all, since they are only
80 * duplicates. So don't be surprised about these log
83 log_debug("Closing left-over fd %i", PTR_TO_FD(p));
84 close_nointr(PTR_TO_FD(p));
87 set_free(MAKE_SET(s));
91 int fdset_put(FDSet *s, int fd) {
95 return set_put(MAKE_SET(s), FD_TO_PTR(fd));
98 int fdset_consume(FDSet *s, int fd) {
104 r = fdset_put(s, fd);
111 int fdset_put_dup(FDSet *s, int fd) {
117 copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
121 r = fdset_put(s, copy);
130 bool fdset_contains(FDSet *s, int fd) {
134 return !!set_get(MAKE_SET(s), FD_TO_PTR(fd));
137 int fdset_remove(FDSet *s, int fd) {
141 return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT;
144 int fdset_new_fill(FDSet **_s) {
145 _cleanup_closedir_ DIR *d = NULL;
152 /* Creates an fdset and fills in all currently open file
155 d = opendir("/proc/self/fd");
165 while ((de = readdir(d))) {
168 if (hidden_file(de->d_name))
171 r = safe_atoi(de->d_name, &fd);
181 r = fdset_put(s, fd);
191 /* We won't close the fds here! */
193 set_free(MAKE_SET(s));
198 int fdset_cloexec(FDSet *fds, bool b) {
205 SET_FOREACH(p, MAKE_SET(fds), i)
206 if ((r = fd_cloexec(PTR_TO_FD(p), b)) < 0)
212 int fdset_new_listen_fds(FDSet **_s, bool unset) {
218 /* Creates an fdset and fills in all passed file descriptors */
226 n = sd_listen_fds(unset);
227 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
228 r = fdset_put(s, fd);
239 set_free(MAKE_SET(s));
244 int fdset_close_others(FDSet *fds) {
250 j = 0, m = fdset_size(fds);
251 a = alloca(sizeof(int) * m);
252 SET_FOREACH(e, MAKE_SET(fds), i)
253 a[j++] = PTR_TO_FD(e);
257 return close_all_fds(a, j);
260 unsigned fdset_size(FDSet *fds) {
261 return set_size(MAKE_SET(fds));
264 bool fdset_isempty(FDSet *fds) {
265 return set_isempty(MAKE_SET(fds));
268 int fdset_iterate(FDSet *s, Iterator *i) {
271 p = set_iterate(MAKE_SET(s), i);
278 int fdset_steal_first(FDSet *fds) {
281 p = set_steal_first(MAKE_SET(fds));