Ruby open external program

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Execute external program in ruby and wait for its execution Ask Question. Asked 10 years, 6 months ago.

Active 10 years, 6 months ago. Viewed 11k times. Add a comment. Active Oldest Votes. Jonathan Jonathan 3, 2 2 gold badges 19 19 silver badges 25 25 bronze badges. The 0xA is a hexadecimal code for the newline character. Printing data to the console using the kernel methods is a shortcut: a convenient way to print data. The following example shows a more formal way to print data to the terminal.

The new method returns a stream to which we can write data. The method takes a numeric file descriptor. We could also simply write 2. By opening it and writing to it, we write to a console. The sysopen method opens the given path, returning the underlying file descriptor number. It can be used to read input from the console.

The read method reads data from the standard input until it reaches the end of the file. When we launch a program without a parameter, the script reads data from the user. The gets method reads a line from the standard input. The data is assigned to the name variable. The data that we have read is printed to the console. We use interpolation to include the variable in the string.

In the following two scripts, we discuss the chomp method. It is a string method which removes white spaces from the end of the string. It is useful when doing input operations. The method name and usage comes from the Perl language. To get the correct answer, we need to remove the newline character. This is a job for the chomp method.

From the official Ruby documentation we learn that the IO class is the basis for all input and output in Ruby. The File class is the only subclass of the IO class. The two classes are closely related.

We used the above opened stream to write some data. The puts method can be used to write data to a file as well. Examples: dot is a command of graphviz. But if the image is stored in a DB or generated by the gnuplot Open3. If it is an array, the elements are passed to Process.

Example: Open3. Each cmd is a string or an array. Example: Run xeyes in 10 seconds. Collect error message of pdftops and lpr. Block form: Open3. A commandline string and a list of argument strings can be accepted as follows: Open3. And have been familiar with the system environment since DOS 2. I think we are saying the same thing in different ways here. Re RubyGems certs, they are only used for gem installation. OpenSSL does not use them unless you specifically write code to do so.

Although it was followed with many other posts, I believe my original post showed that that SU is not in any way blocking external apps from using SSL. But friday evening i found out that there is something bad with my?

I changed the method of calling my. SKP Launching external. Hello all :o I have a problem with my extension on Sketchup Can you reveal how you tried it?

Some new tests even more strange to me In my Application i have put a simple dialog message box at the startup. SU - ran Ruby 2. SU runs Ruby 2. Thanks Dan But what do you mean with that answer? You asked how there could be a difference.