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Might as well run a VM with Linux if you're going to use Cygwin for that. With MSYS2, I frankly don't see a good reason to do that. Note that there are MinGW-w64 cross-compilers that run on Cygwin.
CYGWIN TUTORIAL YO CODE
This is best compared to MSVC, which also produces native code using the Win32 API.
CYGWIN TUTORIAL YO SOFTWARE
winpthreads, the unistd.h headers and some other bits), but you cannot compile POSIX software with this. It contains a tiny POSIX compatibility layer (through e.g.
CYGWIN TUTORIAL YO WINDOWS
MinGW(-w64): A native Windows port of the GCC compiler, including Win32 API headers and libs.
CYGWIN TUTORIAL YO INSTALL
Note that MSYS2 strives for much more and contains a full-blown package management system so you can easily install MinGW-w64 libraries and tools. You are not meant to build MSYS applications at all. Its main goal is to provide a shell so you can run autotools configure scripts. MSYS(2): a fork of Cygwin which has path translation magic to make native Windows programs work nicely with it. It comes with GCC, and to some extent, you can call the Win32 API from within Cygwin, although I'm not sure that is meant to happen or work at all. It provides a POSIX C runtime built on top of Windows so you can compile most Unix software to run on top of it. Without the sleep calls, the timing could go either way (I get about half/half under Linux, a different kernel might make one timing a lot more likely than the other).Cygwin: think of it as an OS. UNIX Tutorial Five 5.1 File system security (access rights) In your unixstuff directory, type ls -l (l for long listing) You will see that you now get lots of details about the contents of your directory, similar to the example below. Since the process that had this pipe open for reading ( echo yo) exited a second ago, the attempt to write to the pipe fails with SIGPIPE (signal 13, which the shell reports as 128+signal_number).Īs G-Man explains, whether hi is displayed in the second case depends on whether tee tries to write to its standard output or its file argument first.
tee reads hi from its input, and attempts to write it both to the terminal (its standard output) and the pipe resulting from >(…) passed as an argument. One second later, sleep 1 exits and tee starts. In parallel with the previous bullet point, echo yo prints yo and exits. The three commands echo hi, echo yo and sleep 1 are started in parallel. In the second variation, I force echo yo to terminate before tee, by forcing it to terminate before tee starts. One second later, sleep 1 finishes, and echo yo is executed. Since tee returned 0, the status of the pipeline is 0. From bash's perspective, both sides of the pipe have exited, so the command is over. It has written all of its data out, so it exits. tee notices that it has reached he end of its input file. In parallel with the previous bullet point, echo hi exits, which closes the write end of the | pipe. This results in one copy of hi printed to the terminal, and one copy in the buffer of the >(…) pipe. tee reads from the pipe and writes to both its standard output and its command line argument, which is another pipe created by >(…). echo hi writes hi to its output (the | pipe). The three commands echo hi, sleep 1 echo yo and tee are started in parallel. The command in the process substitution sleep 1 echo yo is executed in parallel with the commands outside, and bash doesn't wait for it to finish. Notice what's happening in the first variation? $ bash -c 'echo hi | tee >(sleep 1 echo yo) echo $?' To visualize what's going on, compare the following two variations: bash -c 'echo hi | tee >(sleep 1 echo yo) echo $?'īash -c 'wait_and_tee () Įcho hi | wait_and_tee >(echo yo) echo $?' So it doesn’t get a chance to read and write world. In my enhanced example, tee dies when it writes hello to the pipe, So it manages to write hi to the screen before it dies. Whereas, the version of tee on Linux and Cygwin Tee gets the pipe failure on its very first write. So, in your example ( echo hi | tee >(echo yo)), Writes to the file(s) on the command line first, and then its stdout. When it writes to a pipe with no process at the other end, The process writes yo to the stdout and immediately exits. Writing all the data it reads from its stdin to the pipe. The process sits there and reads from stdin until it gets an EOF. That other commands on the command line (in this case, tee)Ĭan open and write to. The standard input of command is connected to a pathname $ (echo hello sleep 1 echo world) | tee >(echo yo) To turn it into something other people will be able to reproduce: $ (echo hello sleep 1 echo world) | tee >(cat) CYGWIN TUTORIAL YO HOW TO
I think I’ve figured out how to tweak your experience
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