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authorMichael Vogt <michael.vogt@ubuntu.com>2007-07-03 21:38:32 +0200
committerMichael Vogt <michael.vogt@ubuntu.com>2007-07-03 21:38:32 +0200
commitd8cb4aa44573aca621110fda47d72bd682c0e3f4 (patch)
tree29c7ed1b74bf59c00f512a84af148aaf4a5bfd93 /apt-pkg/deb
parent6724d2173133f24bc8a3875c13513761f9340627 (diff)
* first (raw and ineffient) implementation
Diffstat (limited to 'apt-pkg/deb')
-rw-r--r--apt-pkg/deb/dpkgpm.cc77
1 files changed, 71 insertions, 6 deletions
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index e5506d3bf..9ca519acd 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -25,6 +25,11 @@
#include <sstream>
#include <map>
+#include <termios.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <pty.h>
+
#include <config.h>
#include <apti18n.h>
/*}}}*/
@@ -516,7 +521,24 @@ bool pkgDPkgPM::Go(int OutStatusFd)
it doesn't die but we do! So we must also ignore it */
sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
-
+
+ struct termios tt;
+ struct winsize win;
+ int master;
+ int slave;
+
+ tcgetattr(0, &tt);
+ ioctl(0, TIOCGWINSZ, (char *)&win);
+ if (openpty(&master, &slave, NULL, &tt, &win) < 0) {
+ fprintf(stderr, _("openpty failed\n"));
+ }
+
+ struct termios rtt;
+ rtt = tt;
+ cfmakeraw(&rtt);
+ rtt.c_lflag &= ~ECHO;
+ tcsetattr(0, TCSAFLUSH, &rtt);
+
// Fork dpkg
pid_t Child;
_config->Set("APT::Keep-Fds::",fd[1]);
@@ -525,8 +547,16 @@ bool pkgDPkgPM::Go(int OutStatusFd)
// This is the child
if (Child == 0)
{
+ setsid();
+ ioctl(slave, TIOCSCTTY, 0);
+ close(master);
+ dup2(slave, 0);
+ dup2(slave, 1);
+ dup2(slave, 2);
+ close(slave);
+
close(fd[0]); // close the read end of the pipe
-
+
if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
@@ -545,7 +575,8 @@ bool pkgDPkgPM::Go(int OutStatusFd)
if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
_exit(100);
}
-
+
+
/* No Job Control Stop Env is a magic dpkg var that prevents it
from using sigstop */
putenv("DPKG_NO_TSTP=yes");
@@ -567,11 +598,19 @@ bool pkgDPkgPM::Go(int OutStatusFd)
// the read buffers for the communication with dpkg
char line[1024] = {0,};
+
char buf[2] = {0,0};
+ char term_buf[2] = {0,0};
+ char input_buf[2] = {0,0};
// the result of the waitpid call
int res;
-
+ close(slave);
+ fcntl(0, F_SETFL, O_NONBLOCK);
+ fcntl(master, F_SETFL, O_NONBLOCK);
+ FILE *term_out = fopen("/var/log/dpkg-out.log","a");
+ chmod("/var/log/dpkg-out.log", 0600);
+
while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
if(res < 0) {
// FIXME: move this to a function or something, looks ugly here
@@ -585,18 +624,41 @@ bool pkgDPkgPM::Go(int OutStatusFd)
signal(SIGINT,old_SIGINT);
return _error->Errno("waitpid","Couldn't wait for subprocess");
}
+
+ // wait for input or output here
+
+ // FIXME: use select() instead of the rubish below
// read a single char, make sure that the read can't block
// (otherwise we may leave zombies)
+ int term_len = read(master, term_buf, 1);
+ int input_len = read(0, input_buf, 1);
int len = read(_dpkgin, buf, 1);
- // nothing to read, wait a bit for more
+ // see if we have any input that needs to go to the
+ // master pty
+ if(input_len > 0)
+ write(master, input_buf, 1);
+
+ // see if we have any output that needs to be echoed
+ // and written to the log
+ if(term_len > 0)
+ {
+ do
+ {
+ fwrite(term_buf, 1, 1, term_out);
+ write(1, term_buf, 1);
+ } while(read(master, term_buf, 1) > 0);
+ term_buf[0] = 0;
+ }
+
+ // nothing to read from dpkg , wait a bit for more
if(len <= 0)
{
usleep(1000);
continue;
}
-
+
// sanity check (should never happen)
if(strlen(line) >= sizeof(line)-10)
{
@@ -702,10 +764,13 @@ bool pkgDPkgPM::Go(int OutStatusFd)
line[0]=0;
}
close(_dpkgin);
+ fclose(term_out);
// Restore sig int/quit
signal(SIGQUIT,old_SIGQUIT);
signal(SIGINT,old_SIGINT);
+
+ tcsetattr(0, TCSAFLUSH, &tt);
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)