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authorFlorian Weimer <fweimer@redhat.com>2016-04-29 09:33:07 +0200
committerFlorian Weimer <fweimer@redhat.com>2016-04-29 09:35:30 +0200
commit137fe72eca6923a00381a3ca9f0e7672c1f85e3f (patch)
treefc4a07ab79ee0f89a6b9d4141d9f4639c87f2f33 /manual/examples
parenta7657f3012765b9c2d80c7387d487fc5156d3bc2 (diff)
downloadglibc-137fe72eca6923a00381a3ca9f0e7672c1f85e3f.tar.gz
glob: Simplify the interface for the GLOB_ALTDIRFUNC callback gl_readdir
Previously, application code had to set up the d_namlen member if the target supported it, involving conditional compilation. After this change, glob will use the length of the string in d_name instead of d_namlen to determine the file name length. All glibc targets provide the d_type and d_ino members, and setting them as needed for gl_readdir is straightforward. Changing the behavior with regards to d_ino is left to a future cleanup.
Diffstat (limited to 'manual/examples')
-rw-r--r--manual/examples/mkdirent.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/manual/examples/mkdirent.c b/manual/examples/mkdirent.c
new file mode 100644
index 0000000000..f8400f46d7
--- /dev/null
+++ b/manual/examples/mkdirent.c
@@ -0,0 +1,42 @@
+/* Example for creating a struct dirent object for use with glob.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+
+ 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 2
+ 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, if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <dirent.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct dirent *
+mkdirent (const char *name)
+{
+ size_t dirent_size = offsetof (struct dirent, d_name) + 1;
+ size_t name_length = strlen (name);
+ size_t total_size = dirent_size + name_length;
+ if (total_size < dirent_size)
+ {
+ errno = ENOMEM;
+ return NULL;
+ }
+ struct dirent *result = malloc (total_size);
+ if (result == NULL)
+ return NULL;
+ result->d_type = DT_UNKNOWN;
+ result->d_ino = 1; /* Do not skip this entry. */
+ memcpy (result->d_name, name, name_length + 1);
+ return result;
+}