1 files changed, 121 insertions, 0 deletions
diff --git a/usr/utils/nuke.c b/usr/utils/nuke.c
new file mode 100644
index 0000000..93a04af
--- /dev/null
+++ b/usr/utils/nuke.c
@@ -0,0 +1,121 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2004-2006 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Simple program which does the same thing as rm -rf, except it takes
+ * no options and can therefore not get confused by filenames starting
+ * with -.  Similarly, an empty list of inputs is assumed to mean don't
+ * do anything.
+ */
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+static const char *program;
+
+static int nuke(const char *what);
+
+static int nuke_dirent(int len, const char *dir, const char *name)
+{
+	int bytes = len + strlen(name) + 2;
+	char path[bytes];
+	int xlen;
+
+	xlen = snprintf(path, bytes, "%s/%s", dir, name);
+	assert(xlen < bytes);
+
+	return nuke(path);
+}
+
+/* Wipe the contents of a directory, but not the directory itself */
+static int nuke_dir(const char *what)
+{
+	int len = strlen(what);
+	DIR *dir;
+	struct dirent *d;
+	int err = 0;
+
+	dir = opendir(what);
+	if (!dir) {
+		/* EACCES means we can't read it.  Might be empty and removable;
+		   if not, the rmdir() in nuke() will trigger an error. */
+		return (errno == EACCES) ? 0 : errno;
+	}
+
+	while ((d = readdir(dir))) {
+		/* Skip . and .. */
+		if (d->d_name[0] == '.' &&
+		    (d->d_name[1] == '\0' ||
+		     (d->d_name[1] == '.' && d->d_name[2] == '\0')))
+			continue;
+
+		err = nuke_dirent(len, what, d->d_name);
+		if (err) {
+			closedir(dir);
+			return err;
+		}
+	}
+
+	closedir(dir);
+
+	return 0;
+}
+
+static int nuke(const char *what)
+{
+	int rv;
+	int err = 0;
+
+	rv = unlink(what);
+	if (rv < 0) {
+		if (errno == EISDIR) {
+			/* It's a directory. */
+			err = nuke_dir(what);
+			if (!err)
+				rmdir(what);
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int i;
+
+	program = argv[0];
+
+	for (i = 1; i < argc; i++)
+		nuke(argv[i]);
+
+	return 0;
+}