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Fix compressed io log corruption in background mode by using _exit()

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instead of exit() to avoid flushing buffers twice.

Improved background mode support.  When not allocating a pty, the
command is run in its own process group.  This prevents write access
to the tty.  When running in a pty, stdin is not hooked up and we
never read from /dev/tty, which results in similar behavior.
This commit is contained in:
Todd C. Miller
2011-05-31 12:49:22 -04:00
parent 7199afec89
commit 3c9e5f28fc
2 changed files with 14 additions and 11 deletions
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14
src/exec_pty.c
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@@ -493,17 +493,21 @@ fork_pty(struct command_details *details, int sv[], int *maxfd)
/*
* Setup stdin/stdout/stderr for child, to be duped after forking.
* In background mode there is no stdin.
*/
io_fds[SFD_STDIN] = io_fds[SFD_SLAVE];
if (!ISSET(details->flags, CD_BACKGROUND))
io_fds[SFD_STDIN] = io_fds[SFD_SLAVE];
io_fds[SFD_STDOUT] = io_fds[SFD_SLAVE];
io_fds[SFD_STDERR] = io_fds[SFD_SLAVE];
/* Copy /dev/tty -> pty master */
if (io_fds[SFD_USERTTY] != -1) {
iobufs = io_buf_new(io_fds[SFD_USERTTY], io_fds[SFD_MASTER],
log_ttyin, iobufs);
/* Read from /dev/tty, write to pty master */
if (!ISSET(details->flags, CD_BACKGROUND)) {
iobufs = io_buf_new(io_fds[SFD_USERTTY], io_fds[SFD_MASTER],
log_ttyin, iobufs);
}
/* Copy pty master -> /dev/tty */
/* Read from pty master, write to /dev/tty */
iobufs = io_buf_new(io_fds[SFD_MASTER], io_fds[SFD_USERTTY],
log_ttyout, iobufs);