Reuse sss_open_cloexec at other places in code.

Functions open_cloexec and openat_cloexec were renamed with prefix
"sss_" and moved to separete file. Replacing duplicated code of
function sss_open_cloexec everywhere in the source code.

https://fedorahosted.org/sssd/ticket/1794

2 files changed, 93 insertions, 0 deletions

diff --git a/src/util/io.c b/src/util/io.c
new file mode 100644
index 00000000..e07a18c5
--- /dev/null
+++ b/src/util/io.c
@@ -0,0 +1,90 @@
+/*
+    SSSD
+
+    compact.c
+
+    Authors:
+        Lukas Slebodnik <lslebodn@redhat.com>
+
+    Copyright (C) 2012 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "util/util.h"
+
+int sss_open_cloexec(const char *pathname, int flags, int *ret)
+{
+    int fd;
+    int oflags;
+
+    oflags = flags;
+#ifdef O_CLOEXEC
+    oflags |= O_CLOEXEC;
+#endif
+
+    errno = 0;
+    fd = open(pathname, oflags);
+    if (fd == -1) {
+        if (ret) {
+            *ret = errno;
+        }
+        return -1;
+    }
+
+#ifndef O_CLOEXEC
+    int v;
+
+    v = fcntl(fd, F_GETFD, 0);
+    /* we ignore an error, it's not fatal and there is nothing we
+     * can do about it anyways */
+    (void)fcntl(fd, F_SETFD, v | FD_CLOEXEC);
+#endif
+
+    return fd;
+}
+
+int sss_openat_cloexec(int dir_fd, const char *pathname, int flags, int *ret)
+{
+    int fd;
+    int oflags;
+
+    oflags = flags;
+#ifdef O_CLOEXEC
+    oflags |= O_CLOEXEC;
+#endif
+
+    errno = 0;
+    fd = openat(dir_fd, pathname, oflags);
+    if (fd == -1) {
+        if (ret) {
+            *ret = errno;
+        }
+        return -1;
+    }
+
+#ifndef O_CLOEXEC
+    int v;
+
+    v = fcntl(fd, F_GETFD, 0);
+    /* we ignore an error, it's not fatal and there is nothing we
+     * can do about it anyways */
+    (void)fcntl(fd, F_SETFD, v | FD_CLOEXEC);
+#endif
+
+    return fd;
+}
diff --git a/src/util/util.h b/src/util/util.h
index 8afb3bc9..d5ff9bb0 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -584,6 +584,9 @@ errno_t sssd_domain_init(TALLOC_CTX *mem_ctx,
 /* from util_lock.c */
 errno_t sss_br_lock_file(int fd, size_t start, size_t len,
                          int num_tries, useconds_t wait);
+/* from io.c */
+int sss_open_cloexec(const char *pathname, int flags, int *ret);
+int sss_openat_cloexec(int dir_fd, const char *pathname, int flags, int *ret);
 
 /* Endianness-compatibility for systems running older versions of glibc */