diff options
Diffstat (limited to 'src/core/fdset.c')
| -rw-r--r-- | src/core/fdset.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/src/core/fdset.c b/src/core/fdset.c deleted file mode 100644 index fe918cd8cc..0000000000 --- a/src/core/fdset.c +++ /dev/null @@ -1,167 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <dirent.h> -#include <fcntl.h> -#include <unistd.h> - -#include "set.h" -#include "util.h" -#include "macro.h" -#include "fdset.h" - -#define MAKE_SET(s) ((Set*) s) -#define MAKE_FDSET(s) ((FDSet*) s) - -/* Make sure we can distuingish fd 0 and NULL */ -#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1) -#define PTR_TO_FD(p) (PTR_TO_INT(p)-1) - -FDSet *fdset_new(void) { - return MAKE_FDSET(set_new(trivial_hash_func, trivial_compare_func)); -} - -void fdset_free(FDSet *s) { - void *p; - - while ((p = set_steal_first(MAKE_SET(s)))) { - /* Valgrind's fd might have ended up in this set here, - * due to fdset_new_fill(). We'll ignore all failures - * here, so that the EBADFD that valgrind will return - * us on close() doesn't influence us */ - - /* When reloading duplicates of the private bus - * connection fds and suchlike are closed here, which - * has no effect at all, since they are only - * duplicates. So don't be surprised about these log - * messages. */ - - log_debug("Closing left-over fd %i", PTR_TO_FD(p)); - close_nointr(PTR_TO_FD(p)); - } - - set_free(MAKE_SET(s)); -} - -int fdset_put(FDSet *s, int fd) { - assert(s); - assert(fd >= 0); - - return set_put(MAKE_SET(s), FD_TO_PTR(fd)); -} - -int fdset_put_dup(FDSet *s, int fd) { - int copy, r; - - assert(s); - assert(fd >= 0); - - if ((copy = fcntl(fd, F_DUPFD_CLOEXEC, 3)) < 0) - return -errno; - - if ((r = fdset_put(s, copy)) < 0) { - close_nointr_nofail(copy); - return r; - } - - return copy; -} - -bool fdset_contains(FDSet *s, int fd) { - assert(s); - assert(fd >= 0); - - return !!set_get(MAKE_SET(s), FD_TO_PTR(fd)); -} - -int fdset_remove(FDSet *s, int fd) { - assert(s); - assert(fd >= 0); - - return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT; -} - -int fdset_new_fill(FDSet **_s) { - DIR *d; - struct dirent *de; - int r = 0; - FDSet *s; - - assert(_s); - - /* Creates an fdsets and fills in all currently open file - * descriptors. */ - - if (!(d = opendir("/proc/self/fd"))) - return -errno; - - if (!(s = fdset_new())) { - r = -ENOMEM; - goto finish; - } - - while ((de = readdir(d))) { - int fd = -1; - - if (ignore_file(de->d_name)) - continue; - - if ((r = safe_atoi(de->d_name, &fd)) < 0) - goto finish; - - if (fd < 3) - continue; - - if (fd == dirfd(d)) - continue; - - if ((r = fdset_put(s, fd)) < 0) - goto finish; - } - - r = 0; - *_s = s; - s = NULL; - -finish: - closedir(d); - - /* We won't close the fds here! */ - if (s) - set_free(MAKE_SET(s)); - - return r; -} - -int fdset_cloexec(FDSet *fds, bool b) { - Iterator i; - void *p; - int r; - - assert(fds); - - SET_FOREACH(p, MAKE_SET(fds), i) - if ((r = fd_cloexec(PTR_TO_FD(p), b)) < 0) - return r; - - return 0; -} |