From a6ae3d3df490e7a5a1c8324ba9dc2e63972b1529 Mon Sep 17 00:00:00 2001 From: Julian Andres Klode Date: Fri, 19 Aug 2016 13:00:33 +0200 Subject: Ignore SIGINT and SIGQUIT for Pre-Install hooks Instead of erroring out when receiving a SIGINT, let the child deal with it - we'll error out anyway if the child exits with an error or due to the signal. Also ignore SIGQUIT, as system() ignores it. This basically fixes Bug #832593, but: we are running the hooks via sh -c. Some shells exit with a signal error even if the command they are executing catches the signal and exits successfully. So far, this has been noticed on dash, which unfortunately, is our default shell. Example: $ cat trap.sh trap 'echo int' INT; sleep 10; exit 0 $ if dash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint FAIL: 130 $ if mksh -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint OK: 0 $ if bash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint OK: 0 --- apt-pkg/deb/dpkgpm.cc | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) (limited to 'apt-pkg/deb/dpkgpm.cc') diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index 54a8dffd7..5759e6ba5 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -417,7 +417,6 @@ bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version) bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) { bool result = true; - static bool interrupted = false; Configuration::Item const *Opts = _config->Tree(Cnf); if (Opts == 0 || Opts->Child == 0) @@ -425,9 +424,8 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) Opts = Opts->Child; sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN); - sighandler_t old_sigint = signal(SIGINT, [](int signum){ - interrupted = true; - }); + sighandler_t old_sigint = signal(SIGINT, SIG_IGN); + sighandler_t old_sigquit = signal(SIGQUIT, SIG_IGN); unsigned int Count = 1; for (; Opts != 0; Opts = Opts->Next, Count++) @@ -528,9 +526,7 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) } signal(SIGINT, old_sigint); signal(SIGPIPE, old_sigpipe); - - if (interrupted) - result = _error->Error("Interrupted"); + signal(SIGQUIT, old_sigquit); return result; } -- cgit v1.2.3