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https://github.com/moby/moby.git
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62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
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package mount
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import (
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"strings"
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"syscall"
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)
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// Parse fstab type mount options into mount() flags
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// and device specific data
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func parseOptions(options string) (int, string) {
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var (
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flag int
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data []string
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)
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flags := map[string]struct {
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clear bool
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flag int
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}{
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"defaults": {false, 0},
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"ro": {false, syscall.MS_RDONLY},
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"rw": {true, syscall.MS_RDONLY},
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"suid": {true, syscall.MS_NOSUID},
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"nosuid": {false, syscall.MS_NOSUID},
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"dev": {true, syscall.MS_NODEV},
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"nodev": {false, syscall.MS_NODEV},
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"exec": {true, syscall.MS_NOEXEC},
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"noexec": {false, syscall.MS_NOEXEC},
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"sync": {false, syscall.MS_SYNCHRONOUS},
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"async": {true, syscall.MS_SYNCHRONOUS},
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"dirsync": {false, syscall.MS_DIRSYNC},
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"remount": {false, syscall.MS_REMOUNT},
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"mand": {false, syscall.MS_MANDLOCK},
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"nomand": {true, syscall.MS_MANDLOCK},
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"atime": {true, syscall.MS_NOATIME},
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"noatime": {false, syscall.MS_NOATIME},
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"diratime": {true, syscall.MS_NODIRATIME},
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"nodiratime": {false, syscall.MS_NODIRATIME},
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"bind": {false, syscall.MS_BIND},
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"rbind": {false, syscall.MS_BIND | syscall.MS_REC},
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"relatime": {false, syscall.MS_RELATIME},
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"norelatime": {true, syscall.MS_RELATIME},
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"strictatime": {false, syscall.MS_STRICTATIME},
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"nostrictatime": {true, syscall.MS_STRICTATIME},
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}
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for _, o := range strings.Split(options, ",") {
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// If the option does not exist in the flags table then it is a
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// data value for a specific fs type
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if f, exists := flags[o]; exists {
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if f.clear {
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flag &= ^f.flag
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} else {
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flag |= f.flag
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}
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} else {
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data = append(data, o)
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}
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}
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return flag, strings.Join(data, ",")
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}
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