diff options
| author | David Kalnischkies <kalnischkies@gmail.com> | 2013-08-13 18:18:15 +0200 |
|---|---|---|
| committer | David Kalnischkies <kalnischkies@gmail.com> | 2013-08-16 11:12:03 +0200 |
| commit | 48498443e74b2a7e089709b954c50b7df374684b (patch) | |
| tree | c75bd81c895e9f9e381156712ace83bb18d3b642 /apt-pkg/deb/dpkgpm.cc | |
| parent | 4b2803b8ff72b0c865c6539b2f99abea5ceee4c6 (diff) | |
allow Pre-Install-Pkgs hooks to get info over an FD != stdin
This adds ::InfoFD option alongside the ::Version one to request sending
the information to the specified FD, by default it is STDIN as it was
the case before.
The environment variable APT_HOOK_INFO_FD contains the FD the data is on as
a confirmation that the APT version used understood the request.
Allowing the hook to choose the FD is needed/helpful e.g. for shellscripts
which have a hard time accessing FDs above 9 (as >= 10 are usually used
internally by them)
Closes: #671728
Diffstat (limited to 'apt-pkg/deb/dpkgpm.cc')
| -rw-r--r-- | apt-pkg/deb/dpkgpm.cc | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index 959d06455..4b5467eff 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -382,24 +382,32 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos); unsigned int Version = _config->FindI(OptSec+"::Version",1); + unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO); // Create the pipes int Pipes[2]; if (pipe(Pipes) != 0) return _error->Errno("pipe","Failed to create IPC pipe to subprocess"); - SetCloseExec(Pipes[0],true); + if (InfoFD != (unsigned)Pipes[0]) + SetCloseExec(Pipes[0],true); + else + _config->Set("APT::Keep-Fds::", Pipes[0]); SetCloseExec(Pipes[1],true); - + // Purified Fork for running the script - pid_t Process = ExecFork(); + pid_t Process = ExecFork(); if (Process == 0) { // Setup the FDs - dup2(Pipes[0],STDIN_FILENO); + dup2(Pipes[0], InfoFD); SetCloseExec(STDOUT_FILENO,false); - SetCloseExec(STDIN_FILENO,false); + SetCloseExec(STDIN_FILENO,false); SetCloseExec(STDERR_FILENO,false); + string hookfd; + strprintf(hookfd, "%d", InfoFD); + setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1); + dpkgChrootDirectory(); const char *Args[4]; Args[0] = "/bin/sh"; @@ -409,6 +417,8 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) execv(Args[0],(char **)Args); _exit(100); } + if (InfoFD == (unsigned)Pipes[0]) + _config->Clear("APT::Keep-Fds", Pipes[0]); close(Pipes[0]); FILE *F = fdopen(Pipes[1],"w"); if (F == 0) |