It seems when su executes in a shell scripts, there is a timing race,
sometimes, su will receive a SIGTTOU when parent su tries to set child su's process group as foreground group, and su will be stopped unexpectly, ignoring SIGTTOU fixes the problem. Noticed by: fjoe
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=122013
@ -359,6 +359,8 @@ main(int argc, char *argv[])
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child_pid = fork();
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switch (child_pid) {
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default:
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sa.sa_handler = SIG_IGN;
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sigaction(SIGTTOU, &sa, NULL);
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close(fds[0]);
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setpgid(child_pid, child_pid);
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tcsetpgrp(1, child_pid);
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