1 files changed, 176 insertions, 0 deletions
diff --git a/udev/udev-util-file.c b/udev/udev-util-file.c
new file mode 100644
index 0000000000..84ff09e050
--- /dev/null
+++ b/udev/udev-util-file.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "udev.h"
+
+int create_path(struct udev *udev, const char *path)
+{
+	char p[UTIL_PATH_SIZE];
+	char *pos;
+	struct stat stats;
+	int ret;
+
+	util_strlcpy(p, path, sizeof(p));
+	pos = strrchr(p, '/');
+	if (pos == p || pos == NULL)
+		return 0;
+
+	while (pos[-1] == '/')
+		pos--;
+	pos[0] = '\0';
+
+	dbg(udev, "stat '%s'\n", p);
+	if (stat(p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
+		return 0;
+
+	if (create_path(udev, p) != 0)
+		return -1;
+
+	dbg(udev, "mkdir '%s'\n", p);
+	udev_selinux_setfscreatecon(udev, p, S_IFDIR|0755);
+	ret = mkdir(p, 0755);
+	udev_selinux_resetfscreatecon(udev);
+	if (ret == 0)
+		return 0;
+
+	if (errno == EEXIST)
+		if (stat(p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
+			return 0;
+	return -1;
+}
+
+int delete_path(struct udev *udev, const char *path)
+{
+	char p[UTIL_PATH_SIZE];
+	char *pos;
+	int retval;
+
+	strcpy (p, path);
+	pos = strrchr(p, '/');
+	if (pos == p || pos == NULL)
+		return 0;
+
+	while (1) {
+		*pos = '\0';
+		pos = strrchr(p, '/');
+
+		/* don't remove the last one */
+		if ((pos == p) || (pos == NULL))
+			break;
+
+		/* remove if empty */
+		retval = rmdir(p);
+		if (errno == ENOENT)
+			retval = 0;
+		if (retval) {
+			if (errno == ENOTEMPTY)
+				return 0;
+			err(udev, "rmdir(%s) failed: %m\n", p);
+			break;
+		}
+		dbg(udev, "removed '%s'\n", p);
+	}
+	return 0;
+}
+
+/* Reset permissions on the device node, before unlinking it to make sure,
+ * that permisions of possible hard links will be removed too.
+ */
+int unlink_secure(struct udev *udev, const char *filename)
+{
+	int retval;
+
+	retval = chown(filename, 0, 0);
+	if (retval)
+		err(udev, "chown(%s, 0, 0) failed: %m\n", filename);
+
+	retval = chmod(filename, 0000);
+	if (retval)
+		err(udev, "chmod(%s, 0000) failed: %m\n", filename);
+
+	retval = unlink(filename);
+	if (errno == ENOENT)
+		retval = 0;
+
+	if (retval)
+		err(udev, "unlink(%s) failed: %m\n", filename);
+
+	return retval;
+}
+
+int file_map(const char *filename, char **buf, size_t *bufsize)
+{
+	struct stat stats;
+	int fd;
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		return -1;
+	}
+
+	if (fstat(fd, &stats) < 0) {
+		close(fd);
+		return -1;
+	}
+
+	*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
+	if (*buf == MAP_FAILED) {
+		close(fd);
+		return -1;
+	}
+	*bufsize = stats.st_size;
+
+	close(fd);
+
+	return 0;
+}
+
+void file_unmap(void *buf, size_t bufsize)
+{
+	munmap(buf, bufsize);
+}
+
+/* return number of chars until the next newline, skip escaped newline */
+size_t buf_get_line(const char *buf, size_t buflen, size_t cur)
+{
+	int escape = 0;
+	size_t count;
+
+	for (count = cur; count < buflen; count++) {
+		if (!escape && buf[count] == '\n')
+			break;
+
+		if (buf[count] == '\\')
+			escape = 1;
+		else
+			escape = 0;
+	}
+
+	return count - cur;
+}