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In computing, touch is a command used to update the access date and/or modification date of a computer file or directory. It is included in Unix and Unix-like operating systems , TSC 's FLEX , [ 1 ] Digital Research / Novell DR DOS , the AROS shell, [ 2 ] the Microware OS-9 shell, [ 3 ] and ReactOS . [ 4 ]
MAC times are pieces of file system metadata which record when certain events pertaining to a computer file occurred most recently. The events are usually described as "modification" (the data in the file was modified), "access" (some part of the file was read), and "metadata change" (the file's permissions or ownership were modified), although the acronym is derived from the "mtime", "atime ...
An issue in the Mac version of Sierra's Creative Interpreter (Mac SCI) would cause the game to "lock-up" when attempting to handle a delay due to a problem involving an overflow. Mac SCI would attempt to use the date to determine how long a delay should last by getting the current time in seconds since 1 January 1904, the Macintosh epoch (see ...
Trusted timestamping is the process of securely keeping track of the creation and modification time of a document. Security here means that no one—not even the owner of the document—should be able to change it once it has been recorded provided that the timestamper's integrity is never compromised.
As of MySQL 8.0.28, released in January 2022, the functions FROM_UNIXTIME(), UNIX_TIMESTAMP(), and CONVERT_TZ() handle 64-bit values on platforms that support them. This includes 64-bit versions of Linux, macOS, and Windows. [32] [33] In older versions, built-in functions like UNIX_TIMESTAMP() will return 0 after 03:14:07 UTC on 19 January 2038 ...
Reference Timestamp (64-bits) 20 160 24 192 Origin Timestamp (64-bits) 28 224 32 256 Receive Timestamp (64-bits) 36 288 40 320 Transmit Timestamp (64-bits) 44 352 48 384 Optional: Extension Field(s) (n * 32 bits) 52 416 Optional: Key Identifier (If a MAC is present) 56 448 Optional: Message Digest (dgst) (If a MAC is present) 60 480 64 512 68 544
Over time, this could lead to file system fragmentation, slowing access to the disk. Apple Pascal attempted to rectify this by saving only to consecutive blocks on the disk. [9] Other innovations introduced in the file system included the introduction of a timestamp feature. Previously only a file's name, basic type, and size would be shown.
The character variants work with any system language. [9] Also while Spotlight is not enabled on the server version of Tiger, [10] it is on the server release of Leopard. [11] In addition, where Spotlight in Tiger had a unique and separate window design, Spotlight in Leopard now shares windows with the Finder, allowing for a more unified GUI.