68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2017-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <unistd.h>
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#include <stdlib.h>
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#include <assert.h>
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static void
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daemon_main (void)
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{
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}
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int
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main ()
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{
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pid_t child;
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alarm (60);
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/* Normally we're a progress group leader at this point, so can't
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create a session. Fork so the child can create a new
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session. */
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child = fork ();
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if (child == -1)
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return 1;
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else if (child != 0)
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return 0;
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else
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{
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/* In child. Switch to a new session. */
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pid_t session = setsid ();
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if (session == -1)
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return 1;
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/* Fork again, so that the grand child (what we want to debug)
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can't accidentally acquire a controlling terminal, because
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it's not a session leader. We're not opening any file here,
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but this is representative of what daemons do. */
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child = fork ();
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if (child == -1)
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return 1;
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else if (child != 0)
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return 0;
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/* In grandchild. */
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daemon_main ();
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while (1)
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sleep (1);
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}
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return 0;
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}
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