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qrexec: create stdin/out/err as sockets instead of pipes

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Instead of pipes, stdin/out/err are created as sockets. This allows
qrexec-agent/daemon to decide to use some of them bidirectional. This is
up to qrexec-agent/daemon, such socket can still be used as
unidirectional channel.

The main reason for this feature is to use USBIP over qrexec, which
require single socket.
This commit is contained in:
Marek Marczykowski-Górecki 2014-10-31 03:53:15 +01:00
parent 82b19d3283
commit 1b5533ae10
1 changed files with 6 additions and 2 deletions
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8
qrexec-lib/exec.c
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@ -19,6 +19,8 @@
* *
*/ */
#include <sys/socket.h>
#include <sys/types.h>
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <stdio.h> #include <stdio.h>
@ -49,8 +51,10 @@ void do_fork_exec(const char *cmdline, int *pid, int *stdin_fd, int *stdout_fd,
{ {
int inpipe[2], outpipe[2], errpipe[2]; int inpipe[2], outpipe[2], errpipe[2];
if (pipe(inpipe) || pipe(outpipe) || (stderr_fd && pipe(errpipe))) { if (socketpair(AF_UNIX, SOCK_STREAM, 0, inpipe) ||
perror("pipe"); socketpair(AF_UNIX, SOCK_STREAM, 0, outpipe) ||
(stderr_fd && socketpair(AF_UNIX, SOCK_STREAM, 0, errpipe))) {
perror("socketpair");
exit(1); exit(1);
} }
switch (*pid = fork()) { switch (*pid = fork()) {