ext/posix: adding POSIX_SC_OPEN_MAX constant.

returns the number of file descriptors that a process can handle. e.g. useful after pcntl_fork() to close all the file descriptors up to that boundary. close GH-16681
php · Nov 2, 2024 · ca5fd05 · ca5fd05
1 parent cf5ded9
commit ca5fd05
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Showing 5 changed files with 20 additions and 1 deletion.
diff --git a/NEWS b/NEWS
@@ -25,6 +25,10 @@ PHP                                                                        NEWS
     its name to be reused. (David Carlier)
   . Added Iterable support for pgsql_copy_from. (David Carlier)
 
+- POSIX:
+  . Added POSIX_SC_OPEN_MAX constant to get the number of file descriptors
+    a process can handle. (David Carlier)
+
 - Random:
   . Moves from /dev/urandom usage to arc4random_buf on Haiku. (David Carlier)
 

diff --git a/UPGRADING b/UPGRADING
@@ -117,6 +117,9 @@ PHP 8.5 UPGRADE NOTES
 10. New Global Constants
 ========================================
 
+- POSIX:
+  . POSIX_SC_OPEN_MAX.
+
 ========================================
 11. Changes to INI File Handling
 ========================================

diff --git a/ext/posix/posix.stub.php b/ext/posix/posix.stub.php
@@ -303,6 +303,13 @@
  */
 const POSIX_PC_SYMLINK_MAX = UNKNOWN;
 #endif
+#ifdef _SC_OPEN_MAX
+/**
+ * @var int
+ * @cvalue _SC_OPEN_MAX
+ */
+const POSIX_SC_OPEN_MAX = UNKNOWN;
+#endif
 
 function posix_kill(int $process_id, int $signal): bool {}
 

diff --git a/ext/posix/posix_arginfo.h b/ext/posix/posix_arginfo.h
diff --git a/ext/posix/tests/posix_sysconf.phpt b/ext/posix/tests/posix_sysconf.phpt
@@ -7,8 +7,10 @@ posix
 var_dump(posix_sysconf(-1));
 var_dump(posix_errno() != 0);
 var_dump(posix_sysconf(POSIX_SC_NPROCESSORS_ONLN));
+var_dump(posix_sysconf(POSIX_SC_OPEN_MAX) >= 256);
 ?>
 --EXPECTF--
 int(-1)
 bool(false)
 int(%d)
+bool(true)