51 lines
1.8 KiB
Diff
51 lines
1.8 KiB
Diff
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From 17206c059dc2e42e7081079b76eafda68cc9a5b8 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Tue, 26 Mar 2013 16:05:07 +0100
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Subject: [PATCH] libmount: fix user-mount by root for mount.<type> helpers
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Append options like "exec" "suid" and "dev" to mount.<type> helpers
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command line if the options are in fstab. This is relevant for root
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user who calls mount(8) for fstab entries with "user,exec" etc.
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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libmount/src/context_mount.c | 22 ++++++++++++++++++++++
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1 file changed, 22 insertions(+)
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diff --git a/libmount/src/context_mount.c b/libmount/src/context_mount.c
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index 00738b4..3b280ab 100644
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--- a/libmount/src/context_mount.c
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+++ b/libmount/src/context_mount.c
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@@ -275,6 +275,28 @@ static int generate_helper_optstr(struct libmnt_context *cxt, char **optstr)
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if (!*optstr)
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return -ENOMEM;
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+ if (cxt->user_mountflags & MNT_MS_USER) {
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+ /*
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+ * This is unnecessary for real user-mounts as mount.<type>
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+ * helpers have to always follow fstab rather than mount
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+ * options on command line.
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+ *
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+ * But if you call mount.<type> as root then the helper follows
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+ * command line. If there is (for example) "user,exec" in fstab
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+ * then we have to manually append the "exec" back to the options
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+ * string, bacause there is nothing like MS_EXEC (we have only
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+ * MS_NOEXEC in mount flags and we don't care about the original
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+ * mount string in libmount for VFS options).
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+ */
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+ if (!(cxt->mountflags & MS_NOEXEC))
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+ mnt_optstr_append_option(optstr, "exec", NULL);
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+ if (!(cxt->mountflags & MS_NOSUID))
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+ mnt_optstr_append_option(optstr, "suid", NULL);
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+ if (!(cxt->mountflags & MS_NODEV))
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+ mnt_optstr_append_option(optstr, "dev", NULL);
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+ }
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+
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+
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if (cxt->flags & MNT_FL_SAVED_USER)
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rc = mnt_optstr_set_option(optstr, "user", cxt->orig_user);
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if (rc)
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--
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1.8.1.4
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