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logind: use open_terminal() instead of open()

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The open_terminal() function adds retries in case a terminal
is in the process of being closed when we open it, and should
generally be used to open a terminal. We especially need it
for code that a subsequent commit adds that reopens the terminal
at session shut-down time; such races would be more likely in
that case.

Found by Ray Strode.
This commit is contained in:
Owen W. Taylor 2015-08-18 14:41:24 -04:00
parent 9a877fd409
commit 2235695335
1 changed files with 1 additions and 1 deletions
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2
src/login/logind-session.c
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@ -986,7 +986,7 @@ static int session_open_vt(Session *s) {
return s->vtfd;
sprintf(path, "/dev/tty%u", s->vtnr);
s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
s->vtfd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
if (s->vtfd < 0)
return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id);