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158b208dfd
If an application using libtevent starts a new process the epoll file descriptor is leaked to the new process if the event context is not freed explicitly. By setting FD_CLOEXEC this is not needed anymore. Signed-off-by: Simo Sorce <idra@samba.org>
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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Unix SMB/CIFS implementation.
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Copyright (C) Andrew Tridgell 2005
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Copyright (C) Jelmer Vernooij 2005
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** NOTE! The following LGPL license applies to the tevent
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** library. This does NOT imply that all of Samba is released
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** under the LGPL
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "talloc.h"
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#include "tevent.h"
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#include "tevent_internal.h"
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#include "tevent_util.h"
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#include <fcntl.h>
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/**
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return the number of elements in a string list
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*/
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size_t ev_str_list_length(const char **list)
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{
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size_t ret;
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for (ret=0;list && list[ret];ret++) /* noop */ ;
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return ret;
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}
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/**
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add an entry to a string list
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*/
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const char **ev_str_list_add(const char **list, const char *s)
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{
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size_t len = ev_str_list_length(list);
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const char **ret;
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ret = talloc_realloc(NULL, list, const char *, len+2);
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if (ret == NULL) return NULL;
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ret[len] = talloc_strdup(ret, s);
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if (ret[len] == NULL) return NULL;
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ret[len+1] = NULL;
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return ret;
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}
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/**
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Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
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else
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if SYSV use O_NDELAY
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if BSD use FNDELAY
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**/
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int ev_set_blocking(int fd, bool set)
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{
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int val;
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#ifdef O_NONBLOCK
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#define FLAG_TO_SET O_NONBLOCK
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#else
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#ifdef SYSV
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#define FLAG_TO_SET O_NDELAY
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#else /* BSD */
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#define FLAG_TO_SET FNDELAY
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#endif
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#endif
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if((val = fcntl(fd, F_GETFL, 0)) == -1)
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return -1;
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if(set) /* Turn blocking on - ie. clear nonblock flag */
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val &= ~FLAG_TO_SET;
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else
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val |= FLAG_TO_SET;
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return fcntl( fd, F_SETFL, val);
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#undef FLAG_TO_SET
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}
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bool ev_set_close_on_exec(int fd)
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{
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#ifdef FD_CLOEXEC
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int val;
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val = fcntl(fd, F_GETFD, 0);
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if (val >= 0) {
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val |= FD_CLOEXEC;
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val = fcntl(fd, F_SETFD, val);
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if (val != -1) {
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return true;
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}
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}
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#endif
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return false;
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}
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