Ensure that the TTY file descriptor is greater than or equal to 10 so that
it doesn't interfere with the user's redirections. PR: 47136 MFC after: 1 week
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=109927
@ -126,9 +126,22 @@ setjobctl(int on)
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i = 0;
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while (i <= 2 && !isatty(i))
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i++;
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if (i > 2 || (ttyfd = dup(i)) < 0)
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if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0)
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goto out;
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}
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if (ttyfd < 10) {
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/*
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* Keep our TTY file descriptor out of the way of
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* the user's redirections.
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*/
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if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) {
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close(ttyfd);
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ttyfd = -1;
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goto out;
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}
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close(ttyfd);
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ttyfd = i;
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}
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if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) {
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close(ttyfd);
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ttyfd = -1;
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