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* Make nix-env --dry-run print the paths to be substituted correctly

again.  (After the previous substituter mechanism refactoring I
  didn't update the code that obtains the references of substitutable
  paths.)  This required some refactoring: the substituter programs
  are now kept running and receive/respond to info requests via
  stdin/stdout.
This commit is contained in:
Eelco Dolstra 2008-08-02 12:54:35 +00:00
parent fc691e1cbd
commit 3c92ea399d
14 changed files with 338 additions and 272 deletions

View file

@ -245,6 +245,10 @@ void killUser(uid_t uid);
string runProgram(Path program, bool searchPath = false,
const Strings & args = Strings());
/* Close all file descriptors except stdin, stdout, stderr, and those
listed in the given set. Good practice in child processes. */
void closeMostFDs(const set<int> & exceptions);
/* Wrapper around _exit() on Unix and ExitProcess() on Windows. (On
Cygwin, _exit() doesn't seem to do the right thing.) */
void quickExit(int status);