Use realpath(). The realpath() function shall derive, from the pathname pointed to by file_name, an absolute pathname that names the same file, whose resolution does not involve ‘.‘, ‘..‘, or symbolic links. The generated pathname shall be stored as a null-terminated string, up to a maximum of {PATH_MAX} bytes, in the buffer pointed to by … Read more
You can actually skip the if, even though Apple’s docs say that the directory must not exist, that is only true if you are passing withIntermediateDirectories:NO That puts it down to one call. The next step is to capture any errors: NSError * error = nil; [[NSFileManager defaultManager] createDirectoryAtPath:bundlePath withIntermediateDirectories:YES attributes:nil error:&error]; if (error != … Read more
I’d like to suggest a solution that differs from the old one. Note that the old one uses the deprecated returning. By the way, it’s anyway specific to Rails, and you didn’t explicitly mention Rails in your question (only as a tag). Also, the existing solution fails to encode .doc.pdf into _doc.pdf, as you requested. … Read more
Here’s sample code that returns a unique File Index. ApproachA() is what I came up with after a bit of research. ApproachB() is thanks to information in the links provided by Mattias and Rubens. Given a specific file, both approaches return the same file index (during my basic testing). Some caveats from MSDN: Support for … Read more
Just to shed some more light on this for internet passer-bys. Yes, the OP answered his own question at the very end. You should never store absolute URLs for files in your documents directory and doing so may cause data loss. This is because when you update an app, by changing its version # in … Read more
You might do it like this, without much hassle: # kpartx -v -a logging-test.img add map loop0p1 (251:0): 0 497664 linear /dev/loop0 2048 add map loop0p2 (251:1): 0 66605058 linear /dev/loop0 501758 add map loop0p5 (251:2): 0 66605056 251:1 2 # ls /dev/mapper/ control loop0p1 loop0p2 loop0p5 # mount /dev/mapper/loop0p1 /mnt/test # mount | grep … Read more
It depends on what filesystem, for example /system and /data are yaffs2 while /sdcard is vfat. This is the output of mount: rootfs / rootfs ro 0 0 tmpfs /dev tmpfs rw,mode=755 0 0 devpts /dev/pts devpts rw,mode=600 0 0 proc /proc proc rw 0 0 sysfs /sys sysfs rw 0 0 tmpfs /sqlite_stmt_journals tmpfs … Read more
To really understand the ephemeral filesystem, you need to understand what a dyno is. You can read more about how dynos work. In a nutshell, though, a process runs on Heroku in a virtual machine with its own filesystem. That virtual machine can stop for a number of reasons, taking the filesystem along with it. … Read more
You can use the FileInfo constructor. It will throw a ArgumentException if “The file name is empty, contains only white spaces, or contains invalid characters.” It can also throw SecurityException or UnauthorizedAccessException, which I think you can ignore if you’re only concerned about format. Another option is to check against Path.GetInvalidPathChars directly. E.g.: boolean possiblePath … Read more
If you can’t/don’t want to keep the file contents in memory but want an atomic rewrite as noted in the other suggestions, you can first copy the original file to a temp directory to a unique path (Apple’s documentation suggests using a temporary directory), then use NSFileManager’s -replaceItemAtURL:withItemAtURL:backupItemName:options:resultingItemURL:error: According to the reference documentation, this method … Read more