Great question Will. If it were my code I would definitely do this. However the problem is manifesting itself for my work with Dirk's great digest package here:
https://github.com/eddelbuettel/digest/blob/947b77e82b97024a874a808a4644be21fc329275/R/digest.R#L170-L173 So because file.access is saying the permissions aren't right, I get an error message from digest and can't create a hash. Knowing full well that this is some weird Windows thing but also knowing I am stuck in that environment, I wanted to figure where I was seeing a difference between those two functions before I went asked Dirk if he'd be interested in a change to that particular bit of code. On Fri, Feb 28, 2020 at 3:28 PM William Dunlap <wdun...@tibco.com> wrote: > > If file.access() says the file is unreadable but file() says it can be > opened, why don't you > just open the file and read it? You can use tryCatch to deal with problems > opening or > reading the file. > > Bill Dunlap > TIBCO Software > wdunlap tibco.com > > > On Fri, Feb 28, 2020 at 2:54 PM Sam Albers <tonightstheni...@gmail.com> wrote: >> >> Thanks Jeff. I am probably not explaining myself very well but my >> question under what circumstances would >> >> summary(file(remote_file, "rb"))$`can read` >> >> be different from: >> >> file.access(remote_file, 4) >> >> If my permissions were different across remote and local should that >> not be reflected in both of these functions? >> >> On Fri, Feb 28, 2020 at 2:37 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us> >> wrote: >> > >> > Dunno. They agree for me. Maybe look closer at all permissions via Windows >> > File Manager? >> > >> > On February 28, 2020 2:06:34 PM PST, Sam Albers >> > <tonightstheni...@gmail.com> wrote: >> > >Some additional follow-up: >> > > >> > >> summary(file(remote_file, "rb"))$`can read` >> > >[1] "yes" >> > > >> > >> summary(file(local_file, "rb"))$`can read` >> > >[1] "yes" >> > > >> > >compared to: >> > > >> > >> file.access(local_file, 4) >> > >local.R >> > > 0 >> > > >> > >> file.access(remote_file, 4) >> > >remote.R >> > > -1 >> > > >> > >Can anyone think why file.access and file would be contradicting each >> > >other? >> > > >> > >Sam >> > > >> > >On Fri, Feb 28, 2020 at 10:47 AM Sam Albers >> > ><tonightstheni...@gmail.com> wrote: >> > >> >> > >> Hi there, >> > >> >> > >> Looking for some help in diagnosing or developing a work around to a >> > >> problem I am having on a Windows machine. I am running R 3.6.2. >> > >> >> > >> I have two identical files, one stored locally and the other stored >> > >on >> > >> a network drive. >> > >> >> > >> For access: >> > >> >> > >> > file.access(local_file, 4) >> > >> local.R >> > >> 0 >> > >> >> > >> > file.access(remote_file, 4) >> > >> remote.R >> > >> -1 >> > >> >> > >> Also for file.info >> > >> >> > >> > file.info(local_file)$mode: >> > >> [1] "666" >> > >> >> > >> > file.info(remote_file)$mode: >> > >> [1] "666" >> > >> >> > >> Ok so I am access issues. Maybe they are ephemeral and I can change >> > >> the permissions: >> > >> >> > >> > Sys.chmod('remote.R', mode = '666') >> > >> > file.access(remote_file, 4) >> > >> remote.R >> > >> -1 >> > >> >> > >> Nope. I am thoroughly stumped and maybe can't make it any further >> > >> because of Windows. >> > >> >> > >> Downstream I am trying to use digest::digest to create a hash but >> > >> digest thinks we don't have permission because file.access is >> > >failing. >> > >> Any thoughts on how I can get file.access to return 0 for the >> > >remote.R >> > >> file? Any ideas? >> > >> >> > >> Thanks in advance, >> > >> >> > >> Sam >> > > >> > >______________________________________________ >> > >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> > >https://stat.ethz.ch/mailman/listinfo/r-help >> > >PLEASE do read the posting guide >> > >http://www.R-project.org/posting-guide.html >> > >and provide commented, minimal, self-contained, reproducible code. >> > >> > -- >> > Sent from my phone. Please excuse my brevity. >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
