fix for fdflags loadable builtin; new strptime loadable builtin; enable -f doesn't fall back to current directory if using BASH_LOADABLES_PATH; new operator for rl_complete_internal that just dumps possible completions

2026-07-09 05:00:49 +02:00 · 2023-11-24 12:39:17 -05:00
parent f491b93350
commit 55a224da44
35 changed files with 1613 additions and 1078 deletions
@@ -0,0 +1,80 @@
+/* Copyright (C) 2023 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <config.h>
+#include <unistd.h>
+#include <errno.h>
+
+#if defined (HAVE_BRK) && !defined (HAVE_SBRK)
+
+static void *initialbrk;
+static void *curbrk;
+
+static int
+brkinit (void)
+{
+  if (initialbrk == 0)
+    {
+      void *b;
+
+      b = brk (NULL);
+      if (b == (void *)-1)
+	return -1;
+      initialbrk = curbrk = b;
+    }
+  return (0);
+}
+
+/* sbrk(3) implementation in terms of brk(2). Good enough for malloc to use. */
+void *
+sbrk (intptr_t incr)
+{
+  void *newbrk, *oldbrk;
+
+  if (initialbrk == 0 && initbrk () == -1)
+    {
+      errno = ENOMEM;
+      return (void *)-1;
+    }
+
+  if (incr == 0)
+    return curbrk;
+
+  /* bounds checking, overflow */
+  if ((incr > 0 && (uintptr_t) curbrk + incr < (uintptr_t) curbrk) ||
+      (incr < 0 && (uintptr_t) curbrk + incr > (uintptr_t) curbrk))
+    {
+      errno = ENOMEM;
+      return (void *)-1;
+    }
+
+  newbrk = curbrk + incr;  
+  if (newbrk < initialbrk)
+    {
+      errno = EINVAL;
+      return (void *)-1;
+    }
+
+  if (brk (newbrk) == (void *)-1)
+    return (void *)-1;		/* preserve errno */
+
+  oldbrk = curbrk;
+  curbrk = newbrk;
+
+  return (oldbrk);
+}
+#endif /* HAVE_BRK && !HAVE_SBRK */