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1. #Mac os x shell script date in variables mac os x#
2. #Mac os x shell script date in variables code#
3. #Mac os x shell script date in variables plus#
4. #Mac os x shell script date in variables series#

However, it doesn't look like this is possible, so I will have to make due with my external dependency: a Ruby script. The syntax is as follows for the GNU/date and BSD/date command: date +FORMAT date +'FORMAT' date +'FORMATFORMAT' date +'FORMAT-FORMAT' An operand with a leading plus ( +) sign signals a user-defined format string which specifies the format in which to display the date and time. In other words, I want it to use some utility available in a vanilla installation of OS X and already on the path.

Here are some notes on how I set up a few Apples running OS X 10.3.

#Mac os x shell script date in variables mac os x#

What I mean is, I don't want my bash script to have to call any other script external to it. Getting Mac OS X 10.3 to Behave Almost Like my Linux Boxes (and other tweaks) Warning Much has changed since 10.3, so dont expect these to work (or be the best way to do things) on 10.4 (Tiger). So perhaps I should clarify what I mean by 'external dependency'. You can solve this portability problem by using the export builtin, as described in this section. As a matter of fact, I already have such a script, written in Ruby. A script written without the export statement may work on some versions of OS X, but will fail on others. Unless you have changed the default Mac OS X setup, you configure your shell by editing your /.tcshrc file. Table 7.2 lists the con-figuration files for the most common shells. I'm familiar with all three of these languages and could easily write a script that does what I want. To configure your shell, edit the appropriate configuration file(s). Several people have commented and responded that Ruby, Python, Perl, and the like come standard with OS X. By default the datetime format needs to be mmddHHMM ccyy. To set the date in shell using the date command line on Unix and macOS, you do not need any options.

Given that caveat, how does one do date math in a bash script on OS X? I've seen a post (on another site) where someone did the following: date -d "-1 day" The date command line allows you to also set your operating system date and time on Linux and Unix systems. However, it is worth noting that the date command can also be used to set the time on a computer.I realize I could whip up a little C or Ruby program to do this, but I want my script to have as few dependencies as possible. The date command isn’t used as much to set time any more, since most systems rely on a Network Time Protocol (NTP) server to supply date and time information. Shell functions should be defined in your /.bashprofile. This is similar to an alias, except that a shell function can be many lines long, and you may use the special variables 1 for the first argument, 2 for the second, and so on.

#Mac os x shell script date in variables series#

To grab the date formatted as such, the following command can be used:ĭate -j -f “%a %b %d %T %Z %Y” “`date`” “+%s” The term shell function applies to series of shell command lines. From that you can conclude that 10.0 had Darwin version 4 which makes sense, because it was the fourth release of NextSTEP, the operating system Mac OS X is based on. Mac OS X 10.2 Jaguar was the first release of Mac OS X to consistently report its Darwin Version as 6. Some of you will be using log analyzers that depend, for example, on unix epoch time. The Darwin Version is number that is increased on every major release of macOS. Now, in our shell script we can create files, add lines to files, etc, with the shortened date stamp.

#Mac os x shell script date in variables code#

If someone was able to point out what I am doing wrong I would be very thankful for your help The script below is the one that I use to log on and download a file list that I format into a command with another script to delete duplicate files Thanks very much Paul Below is the code I am using to log on and download a file list. Here we’re going to grab the current system date from ESX, OS X or Linux (or whatever OSen really) and then use a variable, currentdate, to put that date, formatted into a pretty standard format, YYYYMMDD:Ĭurrentdate=`date ”+%c%m%d” | awk ‘’` command but it breaks the script after the first iteration. In a script this can choose fairly challenging, especially in cases where you just need the date stamp without the time and time zone, etc. Mac OS X is a stunning technical achievement-a virtually crash-proof Unix core paired with the sleek Aqua interface, bringing style, usability, and stability to a new level. At a terminal prompt, it is really straight forward to grab the date, simply use the date command, with no arguments and you will get something similar to the following, including the day, date, time (with seconds), time zone and year: