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50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* Introduction to Non-Local Exits
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Copyright (C) 1991-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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, if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <setjmp.h>
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#include <stdlib.h>
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#include <stdio.h>
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jmp_buf main_loop;
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void
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abort_to_main_loop (int status)
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{
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longjmp (main_loop, status);
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}
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int
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main (void)
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{
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while (1)
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if (setjmp (main_loop))
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puts ("Back at main loop....");
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else
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do_command ();
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}
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void
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do_command (void)
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{
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char buffer[128];
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if (fgets (buffer, 128, stdin) == NULL)
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abort_to_main_loop (-1);
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else
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exit (EXIT_SUCCESS);
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}
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