// Parse the supplied command-line arguments from a mount(8) invocation on OS X
// or Linux.
func parseArgs(
args []string) (
device string,
mountPoint string,
opts map[string]string,
err error) {
opts = make(map[string]string)
// Process each argument in turn.
positionalCount := 0
for i, s := range args {
switch {
// Skip the program name.
case i == 0:
continue
// "-o" is illegal only when at the end. We handle its argument in the case
// below.
case s == "-o":
if i == len(args)-1 {
err = fmt.Errorf("Unexpected -o at end of args.")
return
}
// Is this an options string following a "-o"?
case i > 0 && args[i-1] == "-o":
err = mount.ParseOptions(opts, s)
if err != nil {
err = fmt.Errorf("ParseOptions(%q): %v", s, err)
return
}
// Is this the device?
case positionalCount == 0:
device = s
positionalCount++
// Is this the mount point?
case positionalCount == 1:
mountPoint = s
positionalCount++
default:
err = fmt.Errorf("Unexpected arg %d: %q", i, s)
return
}
}
return
}
// Add the flags accepted by run to the supplied flag set, returning the
// variables into which the flags will parse.
func populateFlags(c *cli.Context) (flags *flagStorage) {
flags = &flagStorage{
// File system
MountOptions: make(map[string]string),
DirMode: os.FileMode(c.Int("dir-mode")),
FileMode: os.FileMode(c.Int("file-mode")),
Uid: int64(c.Int("uid")),
Gid: int64(c.Int("gid")),
// GCS,
KeyFile: c.String("key-file"),
EgressBandwidthLimitBytesPerSecond: c.Float64("limit-bytes-per-sec"),
OpRateLimitHz: c.Float64("limit-ops-per-sec"),
// Tuning,
StatCacheTTL: c.Duration("stat-cache-ttl"),
TypeCacheTTL: c.Duration("type-cache-ttl"),
GCSChunkSize: uint64(c.Int("gcs-chunk-size")),
TempDir: c.String("temp-dir"),
TempDirLimit: int64(c.Int("temp-dir-bytes")),
ImplicitDirs: c.Bool("implicit-dirs"),
// Debugging,
DebugCPUProfile: c.Bool("debug_cpu_profile"),
DebugFuse: c.Bool("debug_fuse"),
DebugGCS: c.Bool("debug_gcs"),
DebugHTTP: c.Bool("debug_http"),
DebugInvariants: c.Bool("debug_invariants"),
DebugMemProfile: c.Bool("debug_mem_profile"),
}
// Handle the repeated "-o" flag.
for _, o := range c.StringSlice("o") {
mountpkg.ParseOptions(flags.MountOptions, o)
}
return
}