Command does not return results in SWIFT

Question

I'm trying to run a command line tool and taking the result. I checked it in terminal:

/usr/bin/exiftool -filename -directory -createdate -model "/Users/dirk/Desktop\" -t -S -q -r -f >"RenamerOutfile0.txt"

This runs fine and delivers result in file. Using SWIFT I tried this:

let task = NSTask()
task.launchPath = "/usr/bin/exiftool"
task.arguments = ["-filename -directory -createdate -model \"/Users/dirk/Desktop\" -t -S -q -r -f"]
let pipe = NSPipe()
task.standardOutput = pipe
task.launch()

let data = pipe.fileHandleForReading.readDataToEndOfFile()

Unfortunatly nothing happens. data is assigned 0 byte - no result. If I insert the redirection to file no file is created. Any idea what's the difference in calling the tool from terminal than with this task?

use: `["-filename", "-directory", "-createdate" ...]` e.g. array of args. also you probably want convert the data to plain String. — clt60, Jun 10 '15 at 22:51
I added:task.arguments = ["-filename", "-directory", "-createdate", "-model", "\"/Users/dirk/Desktop\"", "-t", "-S", "-q", "-r", "-f"] later on I want to use let output: String = NSString(data: data, encoding: NSUTF8StringEncoding)!.stringByAppendingString("") but data is still 0 bytes long. — Peter71, Jun 11 '15 at 07:41
Couldn't format my text, because I was too slow! :-) 5 min limit — Peter71, Jun 11 '15 at 07:46

score 0 · Answer 1 · answered Jun 11 '15 at 09:16

I found a workaround:

let x = system("/usr/bin/exiftool -filename -directory -createdate -model \"/Users/dirk/Desktop\" -t -S -q -r -f >\"/var/tmp/RenamerOutfile0.txt\"")

This works fine. Maybe because I added the path /var/tmp for output file? Doesn't matter! :-)

Command does not return results in SWIFT

1 Answers1