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git.ipfire.org Git - people/ms/systemd.git/blob - fdset.c
1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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
));
150 int fdset_cloexec(FDSet
*fds
, bool b
) {
157 SET_FOREACH(p
, MAKE_SET(fds
), i
)
158 if ((r
= fd_cloexec(PTR_TO_FD(p
), b
)) < 0)