X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/c9034b42ab8da606fc0214dbad54025fc4b586af..fa321bf3dbf363879cfc799b6c1cc4e5af50ffd8:/apt-pkg/deb/dpkgpm.cc diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index e1e26e903..8123a7aba 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -45,8 +46,8 @@ using namespace std; // --------------------------------------------------------------------- /* */ pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) - : pkgPackageManager(Cache), dpkgbuf_pos(0), PackagesDone(0), - PackagesTotal(0), term_out(NULL) + : pkgPackageManager(Cache), dpkgbuf_pos(0), + term_out(NULL), PackagesDone(0), PackagesTotal(0) { } /*}}}*/ @@ -96,68 +97,6 @@ bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge) return true; } /*}}}*/ -// DPkgPM::RunScripts - Run a set of scripts /*{{{*/ -// --------------------------------------------------------------------- -/* This looks for a list of script sto run from the configuration file, - each one is run with system from a forked child. */ -bool pkgDPkgPM::RunScripts(const char *Cnf) -{ - Configuration::Item const *Opts = _config->Tree(Cnf); - if (Opts == 0 || Opts->Child == 0) - return true; - Opts = Opts->Child; - - // Fork for running the system calls - pid_t Child = ExecFork(); - - // This is the child - if (Child == 0) - { - if (chdir("/tmp/") != 0) - _exit(100); - - unsigned int Count = 1; - for (; Opts != 0; Opts = Opts->Next, Count++) - { - if (Opts->Value.empty() == true) - continue; - - if (system(Opts->Value.c_str()) != 0) - _exit(100+Count); - } - _exit(0); - } - - // Wait for the child - int Status = 0; - while (waitpid(Child,&Status,0) != Child) - { - if (errno == EINTR) - continue; - return _error->Errno("waitpid","Couldn't wait for subprocess"); - } - - // Restore sig int/quit - signal(SIGQUIT,SIG_DFL); - signal(SIGINT,SIG_DFL); - - // Check for an error code. - if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) - { - unsigned int Count = WEXITSTATUS(Status); - if (Count > 100) - { - Count -= 100; - for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--); - _error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str()); - } - - return _error->Error("Sub-process returned an error code"); - } - - return true; -} - /*}}}*/ // DPkgPM::SendV2Pkgs - Send version 2 package info /*{{{*/ // --------------------------------------------------------------------- /* This is part of the helper script communication interface, it sends @@ -335,7 +274,6 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) return true; } - /*}}}*/ // DPkgPM::DoStdin - Read stdin and pass to slave pty /*{{{*/ // --------------------------------------------------------------------- @@ -343,9 +281,12 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) */ void pkgDPkgPM::DoStdin(int master) { - char input_buf[256] = {0,}; - int len = read(0, input_buf, sizeof(input_buf)); - write(master, input_buf, len); + unsigned char input_buf[256] = {0,}; + ssize_t len = read(0, input_buf, sizeof(input_buf)); + if (len) + write(master, input_buf, len); + else + stdin_is_dev_null = true; } /*}}}*/ // DPkgPM::DoTerminalPty - Read the terminal pty and write log /*{{{*/ @@ -355,10 +296,18 @@ void pkgDPkgPM::DoStdin(int master) */ void pkgDPkgPM::DoTerminalPty(int master) { - char term_buf[1024] = {0,}; + unsigned char term_buf[1024] = {0,0, }; - int len=read(master, term_buf, sizeof(term_buf)); - if(len <= 0) + ssize_t len=read(master, term_buf, sizeof(term_buf)); + if(len == -1 && errno == EIO) + { + // this happens when the child is about to exit, we + // give it time to actually exit, otherwise we run + // into a race + usleep(500000); + return; + } + if(len <= 0) return; write(1, term_buf, len); if(term_out) @@ -538,6 +487,27 @@ bool pkgDPkgPM::CloseLog() return true; } +/*{{{*/ +// This implements a racy version of pselect for those architectures +// that don't have a working implementation. +// FIXME: Probably can be removed on Lenny+1 +static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds, + fd_set *exceptfds, const struct timespec *timeout, + const sigset_t *sigmask) +{ + sigset_t origmask; + struct timeval tv; + int retval; + + tv.tv_sec = timeout->tv_sec; + tv.tv_usec = timeout->tv_nsec/1000; + + sigprocmask(SIG_SETMASK, sigmask, &origmask); + retval = select(nfds, readfds, writefds, exceptfds, &tv); + sigprocmask(SIG_SETMASK, &origmask, 0); + return retval; +} +/*}}}*/ // DPkgPM::Go - Run the sequence /*{{{*/ // --------------------------------------------------------------------- @@ -613,6 +583,8 @@ bool pkgDPkgPM::Go(int OutStatusFd) } } + stdin_is_dev_null = false; + // create log OpenLog(); @@ -796,7 +768,7 @@ bool pkgDPkgPM::Go(int OutStatusFd) /* No Job Control Stop Env is a magic dpkg var that prevents it from using sigstop */ - putenv("DPKG_NO_TSTP=yes"); + putenv((char *)"DPKG_NO_TSTP=yes"); execvp(Args[0],(char **)Args); cerr << "Could not exec dpkg!" << endl; _exit(100); @@ -819,7 +791,12 @@ bool pkgDPkgPM::Go(int OutStatusFd) // setups fds fd_set rfds; - struct timeval tv; + struct timespec tv; + sigset_t sigmask; + sigset_t original_sigmask; + sigemptyset(&sigmask); + sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask); + int select_ret; while ((res=waitpid(Child,&Status, WNOHANG)) != Child) { if(res < 0) { @@ -834,16 +811,20 @@ bool pkgDPkgPM::Go(int OutStatusFd) signal(SIGINT,old_SIGINT); return _error->Errno("waitpid","Couldn't wait for subprocess"); } - // wait for input or output here FD_ZERO(&rfds); - FD_SET(0, &rfds); + if (!stdin_is_dev_null) + FD_SET(0, &rfds); FD_SET(_dpkgin, &rfds); if(master >= 0) FD_SET(master, &rfds); tv.tv_sec = 1; - tv.tv_usec = 0; - select_ret = select(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv); + tv.tv_nsec = 0; + select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL, + &tv, &original_sigmask); + if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS)) + select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL, + NULL, &tv, &original_sigmask); if (select_ret == 0) continue; else if (select_ret < 0 && errno == EINTR) @@ -867,8 +848,11 @@ bool pkgDPkgPM::Go(int OutStatusFd) signal(SIGQUIT,old_SIGQUIT); signal(SIGINT,old_SIGINT); - if(master >= 0 && slave >= 0) + if(master >= 0) + { tcsetattr(0, TCSAFLUSH, &tt); + close(master); + } // Check for an error code. if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) @@ -938,9 +922,9 @@ void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg) if (Pkg.end() == true) return; pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg); - pkgver = Ver.VerStr(); if (Ver.end() == true) return; + pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr(); pkgRecords Recs(Cache); pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList()); srcpkgname = Parse.SourcePkg();