Is ninja actually minding STDERR?
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Kevin Ingwersen (Ingwie Phoenix)
Nov 9, 2014, 8:47:05 PM11/9/14
to ninja-build
Hey.
While writing on a program that needs to execute child processes, I had to look into Ninja’s code to find a more…cross-platform method. But that brought to my attention, that many people, like on StackOverflow, suggest to just use a redirection instead of creating a pipe for STDOUT and STDERR. I wanted to know, if Ninja actually uses two different pipes or just redirects STDERR into STDOUT and only checks failure on the exit status?
Would be nice to know, since I didn’t find the relative part in the code yet, nly just got thru reading sub_process.cc…
Kind regards, Ingwie
While writing on a program that needs to execute child processes, I had to look into Ninja’s code to find a more…cross-platform method. But that brought to my attention, that many people, like on StackOverflow, suggest to just use a redirection instead of creating a pipe for STDOUT and STDERR. I wanted to know, if Ninja actually uses two different pipes or just redirects STDERR into STDOUT and only checks failure on the exit status?
Would be nice to know, since I didn’t find the relative part in the code yet, nly just got thru reading sub_process.cc…
Kind regards, Ingwie
Evan Martin
Nov 9, 2014, 9:49:39 PM11/9/14
to Ingwie Phoenix, ninja-build
https://github.com/martine/ninja/blob/master/src/subprocess-posix.cc
Search for dup2. FD 1 is stdout, fd 2 is stderr.
brevity due to phone
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