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Some platforms (notably, the BSDs) have a more efficient implementation called

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closefrom(3).


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@168522 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2009-01-12 23:06:12 +00:00
parent a8930194f4
commit fd3cb90841
4 changed files with 18 additions and 5 deletions
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13
main/app.c
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@@ -33,6 +33,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <regex.h>
#include <sys/file.h> /* added this to allow to compile, sorry! */
#include <signal.h>
#include <sys/time.h> /* for getrlimit(2) */
#include <sys/resource.h> /* for getrlimit(2) */
#include <stdlib.h> /* for closefrom(3) */
#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
#include "asterisk/channel.h"
@@ -1839,18 +1842,24 @@ int ast_get_encoded_str(const char *stream, char *result, size_t result_size)
void ast_close_fds_above_n(int n)
{
#ifdef HAVE_CLOSEFROM
closefrom(n + 1);
#else
int x, null;
struct rlimit rl;
getrlimit(RLIMIT_NOFILE, &rl);
null = open("/dev/null", O_RDONLY);
for (x = n + 1; x <= (null >= 8192 ? null : 8192); x++) {
for (x = n + 1; x < rl.rlim_max; x++) {
if (x != null) {
/* Side effect of dup2 is that it closes any existing fd without error.
* This prevents valgrind and other debugging tools from sending up
* false error reports. */
dup2(null, x);
while (dup2(null, x) < 0 && errno == EINTR);
close(x);
}
}
close(null);
#endif
}
int ast_safe_fork(int stop_reaper)