On Aug 15, 9:33pm, idler...@fastmail.fm ("Ian D. Leroux") wrote:
-- Subject: Re: Fixing swap1_stop
| On Tue, 15 Aug 2017 02:11:37 -0400 chris...@zoulas.com (Christos
| Zoulas) wrote:
|
| > On Aug 14, 10:50am, idler...@fastmail.fm ("Ian D. Leroux") wrote:
| > -- Subject: Re: Fixing swap1_stop
| >
| > | Any preferences for a conveniently-parseable format? My first
| > | instinct is to simply drop the spacer words ("on", "type"),
| > | systematically shquote() the device and mount-point and
| > | space-separate the flags. That would look like:
| > |
| > | '/dev/wd0a' '/' ffs synchronous local
| > | 'tmpfs' '/var/shm' tmpfs nosuid local
| >
| > The flags can be complicated (see source code)
| >
| > | That's directly parseable in shell (first three fields are device,
| > | mount point and fstype, any leftovers are individual flags) and
| > | doesn't require the design of another date-style formatting
| > | language. Are there other, better ideas?
| >
| > We can specify a format with % escapes for each field...
|
| I was hoping to avoid being guilty of yet another printf-style
| mini-language. But I don't currently have any better ideas, so let's
| work this one out. The filesystem, mount point and device get an
| escape each (say %f, %m and %d respectively). How should the flags be
| handled? One escape for the whole comma-separate flag string (as in
| the current output)? That's easy to implement and manageable to work
| with, since the flag names are well-behaved single words that are not
| under user control, so they could be parsed with shell globs, something
| like:
|
| FLAGS=$(mount -F '%F')
| case $FLAGS in
| *local*) # do local filesystem stuff
| ;;
| *nosuid*)
| ;;
| esac
|
| Alternatively, each flag could get its own % escape (perhaps one that
| expands to "yes" or "no"), but that makes it harder to write a format
| string that reproduces the default output.
|
| I don't currently have a use for extracting the flag information (since
| my immediate interest is just in getting a reliable mount point name),
| so I'm not sure which format is most useful in practice.
Lets put all the flags together as a comma separated list?
christos
