34 lines
1.2 KiB
C
34 lines
1.2 KiB
C
#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include <sys/vfs.h>
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#include "binfmt-util.h"
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#include "fileio.h"
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#include "missing_magic.h"
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#include "stat-util.h"
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int disable_binfmt(void) {
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int r;
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/* Flush out all rules. This is important during shutdown to cover for rules using "F", since those
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* might pin a file and thus block us from unmounting stuff cleanly.
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*
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* We are a bit careful here, since binfmt_misc might still be an autofs which we don't want to
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* trigger. */
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r = path_is_fs_type("/proc/sys/fs/binfmt_misc", BINFMTFS_MAGIC);
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if (r == 0 || r == -ENOENT) {
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log_debug("binfmt_misc is not mounted, not detaching entries.");
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return 0;
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}
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if (r < 0)
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return log_warning_errno(r, "Failed to determine whether binfmt_misc is mounted: %m");
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r = write_string_file("/proc/sys/fs/binfmt_misc/status", "-1", WRITE_STRING_FILE_DISABLE_BUFFER);
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if (r < 0)
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return log_warning_errno(r, "Failed to unregister binfmt_misc entries: %m");
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log_debug("Unregistered all remaining binfmt_misc entries.");
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return 0;
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}
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