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Use special values SIGCONT_FG and SIGCONT_BG instead of SIGUSR1 and

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SIGUSR2 to indicate whether the child should be continued in the
foreground or background.
This commit is contained in:
Todd C. Miller
2011-02-03 09:59:41 -05:00
parent 34a087acf6
commit 2959d5dadd
2 changed files with 12 additions and 5 deletions
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11
src/exec_pty.c
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@@ -271,7 +271,8 @@ check_foreground(void)
/*
* Suspend sudo if the underlying command is suspended.
* Returns SIGUSR1 if the child should be resume in foreground else SIGUSR2.
* Returns SIGCONT_FG if the child should be resume in the
* foreground or SIGCONT_BG if it is a background process.
*/
int
suspend_parent(int signo)
@@ -295,7 +296,7 @@ suspend_parent(int signo)
} while (!n && errno == EINTR);
ttymode = TERM_RAW;
}
rval = SIGUSR1; /* resume child in foreground */
rval = SIGCONT_FG; /* resume child in foreground */
break;
}
ttymode = TERM_RAW;
@@ -342,7 +343,7 @@ suspend_parent(int signo)
}
sigaction(signo, &osa, NULL);
rval = ttymode == TERM_RAW ? SIGUSR1 : SIGUSR2;
rval = ttymode == TERM_RAW ? SIGCONT_FG : SIGCONT_BG;
break;
}
@@ -709,14 +710,14 @@ deliver_signal(pid_t pid, int signo)
case SIGALRM:
terminate_child(pid, TRUE);
break;
case SIGUSR1:
case SIGCONT_FG:
/* foreground process, grant it controlling tty. */
do {
status = tcsetpgrp(io_fds[SFD_SLAVE], pid);
} while (status == -1 && errno == EINTR);
killpg(pid, SIGCONT);
break;
case SIGUSR2:
case SIGCONT_BG:
/* background process, I take controlling tty. */
do {
status = tcsetpgrp(io_fds[SFD_SLAVE], getpid());