Darwin is the name of the UNIX layer underlying Mac OS X and iOS. It contains elements from FreeBSD, NetBSD and if you install the optional Developer Tools, GNU user-land tools.

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GCC: set architecture to pass to linker

GNU C compiler passes the wrong architecture name to the linker. For example gcc helloworld.i throws the error ld: unknown/unsupported architecture name: -arch arm. After some experimenting with LD, ...
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OSX/Darwin ACL Format

In OS X, if you want to view the ACL information on a file, you can do so with the -e option of `ls. $ ls -lde app/cache drwxrwxr-x+ 7 alanstorm staff 238 Apr 1 10:02 app/cache 0: user:alanstorm ...
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In OS X Darwin, why can I interfere with text input across user sessions using cat?

OS X Darwin: Disrupting Terminal Sessions Across User Identities How, in Brief: with cat < /dev/ttys_, in Terminal. My Question This OS X 10.9.2 Darwin behaviour seems odd to me, and I would ...
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cgroups analogue in Darwin

Is there an analogue to cgroups in Darwin for preventing processes from escaping from the control / monitoring of its parent process by means of fork()? If yes, what is it? For some background, ...
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cat /dev/null > file.log does not truncate large file in Darwin

In the past, on linux systems, I've been able to truncate large, open log files (that is, a file that is being actively written to by a process) using cat /dev/null > file.log. However, on 10.9 ...
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Shorter timeout on I/O errors MacOS X

How do you set a shorter timeout value for read/write I/O errors on MacOSX? We tend to get a few semicrashed disks and want to rsync the contents to a secure location, but when the file subsystem ...
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Why does “User Contributed Perl Documentation” show up when I look for 'man' pages

When I man -f <some string> in addition to the expected Unix man pages, I get a bunch of odd looking entries that all have the header "User Contributed Perl Documentation". For example man ...
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How do the various configuration files determine MANPATH on Darwin?

On Darwin (12.2.0, OS X 10.8.2, bash 3.2.48(1)) my MANPATH appears to be determined by my PATH rather than by the various configuration files associated with man and the man path, /etc/manpaths, ...
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What is Darwin's 'private' directory for?

Darwin has a private directory that I don't see in the Unix documentation I've found. Is that a Mac-specific directory? What is it for? Is it preserved between system upgrades?
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lpstat and localization under Mac OS X

How to force "lpstat" utility to show output messages in English under localized Mac OS X (version 10.6)? Example: lpstat -v Shows in Dutch: apparaat voor Samsung_SCX_4300_Series: usb://..... I ...
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Why does cd // work? [duplicate]

Possible Duplicate: unix, difference between path starting with '/' and '//' On my Mac OS X Lion box, with Bash: $ cd // $ pwd // $ ls Applications System cores ...
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Where can I find a download of Darwin from Apple?

Where can I find a ISO download of Darwin? I downloaded Darwin at one time (even after they stopped releasing the ISOs) off of Apple's website. Unfortunately, I have no idea where the link went. I had ...
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Installing Aqua interface on Darwin

Is is possible to install the Aqua GUI on top of Darwin? I was researching this about a year and a half ago and I don't remember much about what I found out. I also was not the main person in charge ...
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What features does Darwin have that other Unixes don't, or vice versa?

Does Darwin have any features that are specific to it? Do other Unixe(s) have features that Darwin lacks?