Adding debian version 2:2.6.1-4~deb12u2.debian/2%2.6.1-4_deb12u2debian

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 286 insertions, 0 deletions

diff --git a/debian/scripts/passdev.c b/debian/scripts/passdev.c
new file mode 100644
index 0000000..845ccae
--- /dev/null
+++ b/debian/scripts/passdev.c
@@ -0,0 +1,286 @@
+/*
+ * passdev.c - waits for a given device to appear, mounts it and reads a
+ *             key from it which is piped to stdout.
+ *
+ * Copyright (C) 2008   David Härdeman <david@hardeman.nu>
+ *
+ * This package 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 package 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 package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+
+#define _DEFAULT_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/mount.h>
+
+static bool do_debug = false;
+
+static void
+debug(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (!do_debug)
+		return;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+static bool
+do_mount(const char *device, const char *dir)
+{
+	pid_t pid;
+	int status;
+	char *fstypes[] = { "ext4", "ext3", "ext2", "vfat", "btrfs", "reiserfs", "xfs", "jfs", "ntfs", "iso9660", "udf" };
+	int fsindex;
+
+	if (!device || !dir)
+		return false;
+
+	for (fsindex = 0;
+	     fsindex < (sizeof(fstypes) / sizeof(fstypes[0]));
+	     fsindex++)
+	{
+		pid = fork();
+		if (pid < 0) {
+			/* Error */
+			return false;
+		} else if (pid > 0) {
+			/* We're in the parent process */
+			do {
+				waitpid(pid, &status, 0);
+			} while (!WIFEXITED(status) && !WIFSIGNALED(status));
+			if (WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS)
+				return true;
+
+			/* Let's try another fstype */
+			continue;
+		} else {
+			/* We're in the child process */
+			debug("Mounting %s at %s\n", device, dir);
+			close(STDIN_FILENO);
+			close(STDOUT_FILENO);
+			close(STDERR_FILENO);
+			open("/dev/null", O_RDONLY, 0);
+			open("/dev/null", O_WRONLY, 0);
+			open("/dev/null", O_WRONLY, 0);
+			execl("/bin/mount", "/bin/mount", "-n", "-t",
+			      fstypes[fsindex],
+			      /*"ext4,ext3,ext2,vfat,btrfs,reiserfs,xfs,jfs,ntfs,iso9660,udf",*/
+			      "-o", "noatime,nodiratime,nodev,noexec,nosuid,ro",
+			      device, dir, (char *)NULL);
+
+			/* If execl works, we won't end up here */
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	/* We've tried all fstypes with no luck */
+	return false;
+}
+
+int
+main(int argc, char **argv, char **envp)
+{
+	char *debugval;
+	char *devpath;
+	char *filepath;
+	struct stat st;
+	char *tmppath;
+	char tpath[] = "/tmp/passdev.XXXXXX";
+	char *keypath;
+	int fd;
+	size_t toread;
+	size_t bytesread;
+	char *keybuffer;
+	size_t towrite;
+	size_t byteswritten;
+	ssize_t bytes;
+	char *to;
+	int timeout = 0;
+	bool do_timeout = false;
+
+	/* We only take one argument */
+	if (argc != 2) {
+		fprintf(stderr, "Incorrect number of arguments\n");
+		goto error;
+	}
+
+	/* If DEBUG=1 is in the environment, enable debug messages */
+	debugval = getenv("DEBUG");
+	if (debugval && atoi(debugval) > 0)
+		do_debug = true;
+
+	/* Split string into device and path (and timeout) */
+	devpath = argv[1];
+	filepath = strchr(devpath, ':');
+	if (!filepath || !(*filepath) || !(*(filepath + 1))) {
+		fprintf(stderr, "Invalid key path\n");
+		goto error;
+	}
+	*filepath = '\0';
+	filepath++;
+	to = strchr(filepath, ':');
+	if (to && (*to) && (*(to + 1))) {
+		*to = '\0';
+		to++;
+		timeout = atoi(to);
+		if (timeout > 0)
+			do_timeout = true;
+	}
+	debug("Path is %p and filepath is %p\n", devpath, filepath);
+	if (do_timeout)
+		debug("Timeout is %i\n",timeout);
+
+	/* Wait until device is available */
+	if (access(devpath, F_OK)) {
+		debug("Waiting for %s\n", devpath);
+		while(access(devpath, F_OK)) {
+			sleep(1);
+			if (do_timeout) {
+				if (timeout <= 0)
+					break;
+				timeout--;
+			}
+		}
+	}
+
+	/* Make sure device is a blockdev */
+	if (stat(devpath, &st)) {
+		fprintf(stderr, "Unable to stat %s\n", devpath);
+		goto error;
+	} else if (!S_ISBLK(st.st_mode)) {
+		fprintf(stderr, "%s is no block device\n", devpath);
+		goto error;
+	}
+
+	/* Create a tmp dir where we mount the device */
+	tmppath = mkdtemp(tpath);
+	if (!tmppath) {
+		fprintf(stderr, "Failed to create temporary directory\n");
+		goto error;
+	}
+
+	/* Ok, mount it */
+	if (!do_mount(devpath, tmppath)) {
+		fprintf(stderr, "Failed to mount %s\n", devpath);
+		goto error_rmdir;
+	}
+
+	/* Generate the full path to the keyfile */
+	keypath = malloc(strlen(tmppath) + 1 + strlen(filepath) + 1);
+	if (!keypath) {
+		fprintf(stderr, "Failed to allocate memory\n");
+		goto error_umount;
+	}
+	sprintf(keypath, "%s/%s", tmppath, filepath);
+
+	/* Check that the keyfile exists */
+	if (access(keypath, F_OK)) {
+		fprintf(stderr, "Keyfile doesn't exist\n");
+		goto error_free;
+	}
+
+	/* Get the size of the keyfile */
+	if (stat(keypath, &st)) {
+		fprintf(stderr, "Unable to stat keyfile\n");
+		goto error_free;
+	}
+
+	/* Check the size of the keyfile */
+	if (st.st_size < 0) {
+		fprintf(stderr, "Invalid keyfile size\n");
+		goto error_free;
+	}
+	toread = (size_t)st.st_size;
+
+	/* Open the keyfile */
+	if ((fd = open(keypath, O_RDONLY)) < 0) {
+		fprintf(stderr, "Failed to open keyfile\n");
+		goto error_free;
+	}
+
+	/* Allocate a buffer for the keyfile contents */
+	keybuffer = malloc(toread);
+	if (!keybuffer) {
+		fprintf(stderr, "Failed to allocate memory\n");
+		goto error_close;
+		exit(EXIT_FAILURE);
+	}
+
+	/* Read the keyfile */
+	bytesread = 0;
+	while (bytesread < toread) {
+		bytes = read(fd, keybuffer + bytesread, toread - bytesread);
+		if (bytes <= 0) {
+			fprintf(stderr, "Failed to read entire key\n");
+			goto error_keybuffer;
+		}
+		bytesread += bytes;
+	}
+
+	/* Clean up */
+	close(fd);
+	free(keypath);
+	umount(tmppath);
+	rmdir(tmppath);
+
+	/* Write result */
+	byteswritten = 0;
+	towrite = toread;
+	while (byteswritten < towrite) {
+		bytes = write(STDOUT_FILENO, keybuffer + byteswritten,
+			      towrite - byteswritten);
+		if (bytes <= 0) {
+			fprintf(stderr, "Failed to write entire key\n");
+			memset(keybuffer, 0, toread);
+			free(keybuffer);
+			goto error;
+		}
+		byteswritten += bytes;
+	}
+
+	/* Clean up */
+	memset(keybuffer, 0, toread);
+	free(keybuffer);
+
+	/* Done */
+	exit(EXIT_SUCCESS);
+
+	/* Error handling */
+error_keybuffer:
+	memset(keybuffer, 0, toread);
+	free(keybuffer);
+error_close:
+	close(fd);
+error_free:
+	free(keypath);
+error_umount:
+	umount(tmppath);
+error_rmdir:
+	rmdir(tmppath);
+error:
+	exit(EXIT_FAILURE);
+}
+