101 lines
4.3 KiB
Diff
101 lines
4.3 KiB
Diff
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From 9040e15cd3cba546b47aeae0ea133afa1a6ad292 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Wed, 13 Nov 2019 10:32:30 +0100
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Subject: [PATCH] cryptsetup-generator: guess whether the keyfile argument is
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two items or one
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Fixes #13615.
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See the inline comment for documentation.
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(cherry picked from commit 32c6237a7c2e697d2fc4f3403319db16858fb8e3)
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Related: #1763155
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---
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src/cryptsetup/cryptsetup-generator.c | 45 ++++++++++++++++++---------
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1 file changed, 30 insertions(+), 15 deletions(-)
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diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c
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index a09983b576..4117930925 100644
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--- a/src/cryptsetup/cryptsetup-generator.c
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+++ b/src/cryptsetup/cryptsetup-generator.c
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@@ -54,17 +54,36 @@ static int split_keyspec(const char *keyspec, char **ret_keyfile, char **ret_key
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c = strrchr(keyspec, ':');
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if (c) {
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- keyfile = strndup(keyspec, c-keyspec);
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- keydev = strdup(c + 1);
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- if (!keyfile || !keydev)
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+ /* The keydev part has to be either an absolute path to device node (/dev/something,
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+ * /dev/foo/something, or even possibly /dev/foo/something:part), or a fstab device
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+ * specification starting with LABEL= or similar. The keyfile part has the same syntax.
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+ *
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+ * Let's try to guess if the second part looks like a keydev specification, or just part of a
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+ * filename with a colon. fstab_node_to_udev_node() will convert the fstab device syntax to
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+ * an absolute path. If we didn't get an absolute path, assume that it is just part of the
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+ * first keyfile argument. */
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+
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+ keydev = fstab_node_to_udev_node(c + 1);
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+ if (!keydev)
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return log_oom();
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- } else {
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+
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+ if (path_is_absolute(keydev))
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+ keyfile = strndup(keyspec, c-keyspec);
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+ else {
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+ log_debug("Keyspec argument contains a colon, but \"%s\" doesn't look like a device specification.\n"
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+ "Assuming that \"%s\" is a single device specification.",
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+ c + 1, keyspec);
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+ keydev = mfree(keydev);
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+ c = NULL;
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+ }
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+ }
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+
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+ if (!c)
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/* No keydev specified */
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keyfile = strdup(keyspec);
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- keydev = NULL;
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- if (!keyfile)
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- return log_oom();
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- }
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+
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+ if (!keyfile)
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+ return log_oom();
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*ret_keyfile = TAKE_PTR(keyfile);
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*ret_keydev = TAKE_PTR(keydev);
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@@ -73,7 +92,7 @@ static int split_keyspec(const char *keyspec, char **ret_keyfile, char **ret_key
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}
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static int generate_keydev_mount(const char *name, const char *keydev, const char *keydev_timeout, bool canfail, char **unit, char **mount) {
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- _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL;
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+ _cleanup_free_ char *u = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL;
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_cleanup_fclose_ FILE *f = NULL;
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int r;
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usec_t timeout_us;
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@@ -111,22 +130,18 @@ static int generate_keydev_mount(const char *name, const char *keydev, const cha
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if (r < 0)
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return r;
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- what = fstab_node_to_udev_node(keydev);
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- if (!what)
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- return -ENOMEM;
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-
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fprintf(f,
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"[Unit]\n"
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"DefaultDependencies=no\n\n"
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"[Mount]\n"
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"What=%s\n"
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"Where=%s\n"
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- "Options=ro%s\n", what, where, canfail ? ",nofail" : "");
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+ "Options=ro%s\n", keydev, where, canfail ? ",nofail" : "");
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if (keydev_timeout) {
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r = parse_sec_fix_0(keydev_timeout, &timeout_us);
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if (r >= 0) {
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- r = unit_name_from_path(what, ".device", &device_unit);
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+ r = unit_name_from_path(keydev, ".device", &device_unit);
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if (r < 0)
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return log_error_errno(r, "Failed to generate unit name: %m");
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