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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /dirent/scandir.c
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initial import
Diffstat (limited to 'dirent/scandir.c')
-rw-r--r--dirent/scandir.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/dirent/scandir.c b/dirent/scandir.c
new file mode 100644
index 0000000000..6794eadf0d
--- /dev/null
+++ b/dirent/scandir.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <dirent.h>
+#include <stdlib.h>
+
+int
+DEFUN(scandir, (dir, namelist, select, cmp),
+ CONST char *dir AND
+ struct dirent ***namelist AND
+ int EXFUN((*select), (struct dirent *)) AND
+ int EXFUN((*cmp), (CONST PTR, CONST PTR)))
+{
+ DIR *dp = opendir (dir);
+ struct dirent **v = NULL;
+ size_t vsize = 0, i;
+ struct dirent *d;
+ int save;
+
+ if (dp == NULL)
+ return -1;
+
+ save = errno;
+ errno = 0;
+
+ i = 0;
+ while ((d = readdir (dp)) != NULL)
+ if (select == NULL || (*select) (d))
+ {
+ if (i == vsize)
+ {
+ struct dirent **new;
+ if (vsize == 0)
+ vsize = 10;
+ else
+ vsize *= 2;
+ new = (struct dirent **) realloc (v, vsize * sizeof (*v));
+ if (new == NULL)
+ {
+ lose:
+ errno = ENOMEM;
+ break;
+ }
+ v = new;
+ }
+
+ v[i] = (struct dirent *) malloc (sizeof (**v));
+ if (v[i] == NULL)
+ goto lose;
+
+ *v[i++] = *d;
+ }
+
+ if (errno != 0)
+ {
+ save = errno;
+ (void) closedir (dp);
+ while (i > 0)
+ free (v[--i]);
+ free (v);
+ errno = save;
+ return -1;
+ }
+
+ (void) closedir (dp);
+ errno = save;
+
+ /* Sort the list if we have a comparison function to sort with. */
+ if (cmp != NULL)
+ qsort (v, i, sizeof (*v), cmp);
+ *namelist = v;
+ return i;
+}